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August 2006

Catnic

Lintel Product Selector

August 2006
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9616 Catnic Lintel Brochure 2/8/06 12:40 Page 1

Catnic - The Name to

Build a Reputation On

Contents
Page Introduction
2 Leaders in Technical Innovation
3 Help When You Need It
4 Catnic Service Package
Lintel Guidelines
5 How to Select a Lintel
6 Catnic Lintel Benefits
10 Lintel Selector - Cavity Walls
11 Lintel Selector - All Products
12 Installing a Cavity Wall Lintel
13 Installing a Lintel Supporting Concrete Floors
Products
14 Cougar Open Back Lintels
24 Classic Combined Box Lintels
25 CXL Lintels
28 Cavity Wall Eaves Lintels
32 Timber Frame Lintels
35 Installing a Timber Frame Lintel
36 External Solid Wall Lintels
40 Internal Partition and Loadbearing Wall Lintels
Extended Range
46 Standard Arch Lintels
47 Bespoke Lintels
48 Fabricated Arch Lintels
49 Enquiry Form - Fabricated Arch Lintels
50 Fabricated Corner and Bay Lintels
51 Enquiry Form - Fabricated Bay Lintels
52 Corner Lintels
53 Enquiry Form - Bay and Corner Lintels
Accessories
55 Lintel Arch Centres
56 Stop Ends
57 Weep Vents and Soffit Cladding
Technical Specifications & Quality Assurances
58 Where to Use a Separate DPC
59 Quality Assurance
60 Technical Information
61 The Environment
62 Technical Specification & Glossary
63 Technical Enquiry Request Form
64 Notes Page
65 Other Catnic Products

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Catnic - Leaders in
Technical Innovation

Catnic has pioneered the steel lintel for more than three generations and designs,
manufactures and supplies the construction industry with technically superior
products. Catnics reputation has been earned through constant technical innovation
and leading the UK lintel market.

Catnic was the First: Corus

To develop the steel lintel in the UK and the first to An international company with steel at the heart of its
gain BBA Approval strategic focus, Corus has many operations worldwide
Manufacturer to employ the revolutionary two-part and is united by a strong corporate brand. The Corus
corrosion protection system on its lintel as a logo is a symbol of confidence and a mark
standard offering of quality and service.
To gain both BBA approval and the coveted Kitemark
to BS 5977 Corus is a customer focused, innovative solutions-driven
To incorporate a built-in Damp Proof Course into company, which manufactures, processes and
its lintels distributes metal products as well as providing design,
To provide a built-in plaster key technology and consultancy services.

Far from just leading, Catnic in fact has worked over the
years with the BSI to establish the standards for lintels
in this country, and continues to develop and invest in
improving on these standards with its extensive range of
products and unique features.

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Help When You Need It

Fully committed to providing first class
service support

Catnic is committed to providing the building industry Catnics sales and technical teams are dedicated to
with new and improved products, borne from investment matching the quality of our products with the excellence
in design and manufacturing technologies. of our service, from the professional voice at the end of
the telephone to our on-site consultation.
Catnic means:
The strongest brand in the industry Full service support for customers
A partnership approach to the way we work Catnic has been at the forefront of lintel design for over
Dedicated haulier - liveried lorries 35 years. Our reputation for exceptional quality and
Servicing builders, architects, specifiers technical expertise has ensured customers satisfaction
and merchants and loyalty in the products and services that we offer.
Committed to both national and independent
merchants Catnics team:
Investment in plant and machinery and the latest Are professional and experienced
technologies Are extensively trained
Continuously dedicated to research and development Have comprehensive product and industry knowledge
of the industry and our product offering Have a committed parent company who are Investors
in People Corus.
We hope that you will find this Lintel Product Selector
both useful and informative. Should you require any visit
our website
further assistance or information about our other
product ranges then please call us on 029 2033 7900. www. .com
om
w

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w.
c atnic.c

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Catnic Service Package

Unsurpassed technical service and support from
our experienced, helpful and friendly team

Technical support
Experienced engineers qualified in construction enable Catnic
to offer an advisory service to anyone engaged on building
projects, regardless of size, from a private house extension, to
a major housing development or commercial building.

Free scheduling service

CLASS The Catnic Lintel Advanced Scheduling System is
the most comprehensive, enviable lintel scheduling service
available. One concise document leaves no room for
confusion or misunderstanding. CLASS clearly provides:
A description of each lintel, its location, price and
The Catnic service package includes: delivery time
Experienced and dedicated team of lintel sales Guaranteed structural adequacy
representatives A site summary
Fully trained, professional internal customer support team
To access the benefits of CLASS free of charge, simply
for all your needs; from placing orders, to enquiring about
send your project drawings (dimensional plans, sections
prices or deliveries
and elevations), floor layout and roof carcass, (along with a
Comprehensive range of back-up literature from desk top
copy of the technical enquiry form in the back of this
technical guides, to pocket and installation guides
Product Selector) to our Technical team.
On-line help via Catnic.com
CAD details available on-line or CD-ROM providing
Design service for bespoke lintels
instant access to lintel drawings
In addition to its standard range, Catnic design and
Technical enquiry forms to accompany your drawings
manufacture a huge range of specials. The bespoke
ensuring necessary information is received and turned
range is designed and fabricated to satisfy features such as
around in a timely manner
long spans, chamfered brickwork, reduced toe lintels for
On-site sales and technical support when required
cant bricks, arched openings and other applications where
Technical hotline for all queries
non-standard construction is utilised. For further
Dedicated hauliers for all your deliveries
information please turn to page 46 of this guide.
Consultation at every stage of your job
Lintel scheduling and specification via CLASS Telephone Technical Services on
Extensive range of standard and bespoke lintels 029 2033 7900
or alternatively fax your enquiry on
029 2086 0135

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How to Select a Lintel

You need to know 3 things:
1 The wall construction 2 The length of lintel required 3 The load to be applied on the lintel
Once you have established each of the above, you will be able to choose the correct
lintel for your job by referring to the relevant tables in this guide

1. Wall Construction External Solid Wall 2. Lintel Length

Once you have determined your wall There are three forms The length of lintel required is
construction please refer to the lintel of lintel for external calculated by establishing the total
selector on page 11 solid walls: width of the structural opening and
single element adding 150mm (200mm for CXL
Cavity Wall
lintels for a single lintels) end bearing allowance for
If the construction is a
leaf of brickwork each end. For example, an 1800mm
cavity wall, see the
two-piece lintels shaped to carry structural opening will require a
Open Back lintel section
the two separate leaves of a 2100mm lintel (2200mm for CXL).
on page 14. You will
215mm fair face brick wall
need to know the cavity 3. Applied Load
box profile lintels which have a toe
wall dimensions to choose the All lintels are designed to carry a
for use in solid brick or block walls
correct lintel: specific safe working load (SWL).
from 200mm 215mm thick
the external leaf dimension If you are not skilled in the method
Lintels suitable for use in external
the cavity dimension including of load assessment, or the load has
solid wall constructions can be found
insulation not been supplied to you by a third
on page 36.
the internal leaf dimension party, then please contact Catnic
Also, please refer to the Lintel Internal Partition Technical Services on
Selector on page 10. and Load Bearing Wall 029 2033 7900 for advice.
Lintels for internal
Timber Frame Once you have established:
partitions and load
For timber frame constructions, you 1 your wall construction
bearing walls come in
need to know: 2 lintel length
three styles:
the external 3 applied load
corrugated lintels
leaf dimension you will be able to choose the
for non-load bearing applications
cavity dimension perfect Catnic lintel for your job by
channel section lintels for loadings
Once you have these referring to the relevant tables in this
involving floor joists or blockwork
dimensions, please refer to the Product Selector.
box profile lintels for heavier loads
Timber Frame lintels section on
including point loads and wider
page 32.
openings. These lintels are featured
on page 40.

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Cougar Open Back Lintels

The first lintel manufacturer to achieve both BBA
approval and the BSI Kitemark showing commitment
to quality has always been at the top of our agenda.

Fully insulated CFC &

HCFC - free full height
insulation maximises
thermal efficiency and
Part L compliant.

Built in Plaster key

Avoids the hazards of
working with mesh key.
The unique design of
perforated base plates
on CL/CU lintels
minimises cold bridging
without affecting
structural performance.

Built in DPC Conforms to NHBC required Product Benefits & Design Features
profile. No additional DPC is required in many Self - weight of lintel allows easy handling solutions
areas of the UK, making construction quicker Profile shape designed for use without a separate DPC,
and easier, giving extra peace of mind but also whilst providing additional support when required
saving on time and cost. Where a DPC is BBA and BSI kitemark certified products
required, the lintel profile is shaped to support Corrosion protected
the DPC during construction. Safe working lintel loads are provided throughout this
product selector with reference to various differential
loading arrangements which are common to traditional
cavity wall construction

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Superb Corrosion resistance High quality galvanised steel PLUS

black polyester powder coating.

1st corrosion protection layer galvanised steel

2nd corrosion protection layer black polyester coating

Catnic was the first to powder coat lintels in the industry,

and are the only manufacturer to employ the famous black
finish - as standard - on top of a galvanised base material,
with no additional premiums to be paid.

This double protection gives Catnic lintels inherent

Negligible cold bridging due to base design benefits over those offered by other manufacturers
Independently tested with appropriate finishes to using only pre-or post-galvanised steel techniques.
achieve 1 hour fire rating Both these processes rely on just one coating of zinc to
Efficient plaster key provide cathodic protection. The zinc protects the steel
Manufactured under a quality assurance system to but is itself liable to rust with aqueous solutions leaching
BS EN ISO 9001: 2000 from the building fabric, and therefore corrode.
Catnics black polyester coating process provides an
The cavity wall lintel range are structurally sound without the effective barrier against moisture or chemical attack
need for any base plate thus making them thermally efficient, leached from the masonry construction through
removing any doubt about the effect of cold bridging. using both systems.

The Black Lintel = Improved Corrosion Protection The protection system complies fully with the chemical and
Many Catnic lintels employ not one but two methods of physical test requirements outlined in Table 2 of BS5977:
protection against corrosion attack: the unique, PART 2: 1983 for lintels having their own built-in Damp
sophisticated Duplex double protection system. Proof Course (DPC).

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Catnic Lintels
Our rigid adherence to quality control and compliance
is your guarantee of technical superiority

Catnics Cougar Open Back (page 14) lintels are easy to Load ratios
use profiles allowing masonry to be built up continuously on Safe working loads, as defined by BS 5977: Part 2 for
both the inner and outer leaves saving time and cost on cavity wall lintels refer to uniform distributed loads
site. Cougars are fully insulated by moulding expanded applied in the inner to outer leaf ratios:
polystyrene bead into the CG style lintel, forming a ribbed
1:1 For lintels supporting masonry only
finish on the underside to provide a plaster key. The rigid
3:1 For lintels normally carrying timber floors
slotted base on CL & CU lintels provides plaster adhesion
5:1 For lintels normally carrying concrete floors
and avoids the hazards of working with mesh.
The CL & CU lintel range refers to uniformly distributed
Parts L1 & L2 of the Building Regulations loads in the ratio of 19:1 when non standard or unusual
Approved Documents loading conditions occur.
Catnics lintels comply with the amended Approved
Document L regulations. Catnics compliance illustrates their
position as technical leaders, always striving for continuous
improvement in more energy efficient construction practices.

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Material
Catnic Cougar and Classic lintels are manufactured from
high quality grade galvanised steel to BS EN 10327:2004
DX51D & Z275, with a black coloured polyester resin finish.

Damp Proof Course Quality control checks on the incoming steel include:
The design of Catnic Cougar open back and combined Dimensional tolerances
box lintels incorporates a built in DPC, and any water Mechanical properties
penetrating the cavity automatically transfers across the Thickness
sloping face of the lintel and is disposed of externally. In Quality of the galvanising
areas of sheltered to medium exposed weather conditions
there is no need to install a separate DPC. Quality control checks during manufacture include:
Dimensions
Quality Thickness
Catnic lintels are manufactured to the highest quality and Weld quality
are continually assessed both internally and by numerous Quality and accuracy of the black coating
external, independent organisations. All quality assurance Insulation
systems comply with BS EN ISO 9001: 2000.

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Lintel Selector - Cavity Walls

based on 102mm external leaf dimension

Inner Block size (mm) Cavity 50-65mm Page Cavity 70-85mm Page Cavity 90-105mm Page

CG50/100 18 CG70/100 20 CG90/100 22

CGH50/100 18 CGH70/100 20 CGH90/100 22
100mm

CLA50/100 - CLB50/100 CLA70/100 - CLB70/100 CLA90/100 - CLB90/100

18 20 22
CUB50/100 - CU50/100 CUB70/100 - CU70/100 CUB90/100 - CU90/100

CG50/100 18 CG70/100 20 CG90/100 22

CGH50/100 18 CGH70/100 20 CGH90/100 22
115mm

CLA50/100 - CLB50/100 CLA70/100 - CLB70/100 CLA90/100 - CLB90/100

18 20 22
CUB50/100 - CU50/100 CUB70/100 - CU70/100 CUB90/100 - CU90/100

CG50/125 19 CG70/125 21 CG90/125 23

CGH50/125 19 CGH70/125 21 CGH90/125 23
125mm

CLA50/125 - CLB50/125 CLA70/125 - CLB70/125 CLA90/125 - CLB90/125

19 21 23
CUB50/125 - CU50/125 CUB70/125 - CU70/125 CUB90/125 - CU90/125

CG50/125 19 CG70/125 21 CG90/125 23

CGH50/125 19 CGH70/125 21 CGH90/125 23
140mm

CLA50/125 - CLB50/125 CLA70/125 - CLB70/125 21 CLA90/125 - CLB90/125

19 23
CUB50/125 - CU50/125 CUB70/125 - CU70/125 CUB90/125 - CU90/125

Note:
The above table represents our standard stock range of cavity wall lintels. For any requirements that fall outside of these
parameters please contact Technical Services on 029 2033 7900 for advice on Catnics extensive range of special lintels

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Lintel Selector - All Products

Inner Leaf Cavity Outer Leaf Lintel Codes Application Page

100-115 50-65 102 CG50/100, CGH50/100, CLA50/100, Open Back Lintel 18

CLB50/100, CUB50/100, CU50/100 Open Back Lintel

125-140 50-65 102 CG50/125, CGH50/125, CLA50/125, Wide Inner Leaf Open Back Lintel 19

CLB50/125, CUB50/125, CU50/125 Wide Inner Leaf Open Back Lintel

100-115 70-85 102 CG70/100, CGH70/100, CLA70/100, Open Back Lintel 20

CLB70/100, CUB70/100, CU70/100 Open Back Lintel

125-140 70-85 102 CG70/125, CGH70/125, CLA70/125, Wide Inner Leaf Open Back Lintel 21

CLB70/125, CUB70/125, CU70/125 Wide Inner Leaf Open Back Lintel

100-115 90-105 102 CG90/100, CGH90/100, CLA90/100, Open Back Lintel 22

CLB90/100, CUB90/100, CU90/100 Open Back Lintel

125-140 90-105 102 CG90/125, CGH90/125, CLA90/125, Wide Inner Leaf Open Back Lintel 23

CLB90/125, CUB90/125, CU90/125 Wide Inner Leaf Open Back Lintel

100-115 50 140-150 CN42, CN99/124 Combined Box Lintel Wide Outer Leaf 24

100-115 50 102 CXL240 Extreme Heavy Duty Lintel 27

100-140 50-70 102 CXL265 Extreme Heavy Duty Lintel 27

100-140 70-90 102 CXL290 Extreme Heavy Duty Lintel 27

100-115 50-85 N/A CGE50/100 Open Back Eaves Lintel 30

125-140 50-85 N/A CGE50/125 Wide Inner Leaf Open Back Eaves Lintel 30

100-115 90-105 N/A CGE90/100 Open Back Eaves Lintel 30

125-140 90-105 N/A CGE90/125 Wide Inner Leaf Open Back Eaves Lintel 30

100 50-75 N/A CN55 Box Eaves Lintel 31

N/A 50-60 102 CTF5 Timber Frame Lintel 34

N/A 60-70 102 CTF6 Timber Frame Lintel 34

N/A 70-80 102 CTF7 Timber Frame Lintel 34

N/A 35-60 102 CN23 Timber Frame Lintel 34

N/A 200-215 CN71, CN81, CN99/394 External Solid Wall 38

N/A 102 CN48, CN49 External Solid Wall 39

N/A 102 CNZ94, CNZ95, CNZ96, CNZ97 External Solid Wall 39

N/A 215 CN50, CN51 External Solid Wall 39

75 N/A CN92 Internal Partition Lintel 42

100 N/A CN100, CN102 Internal Partition Lintel 42

100 N/A CN5X, CN6X, CN99/438 Internal Partition Lintel 42

140-150 N/A CN56X, CN66X, CN99/436 Internal Partition Lintel 43

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Installing a Cavity Wall Lintel

Ensure lintel is level along its length.

Ensure a nominal
150mm end bearing
Ensure lintel is
at each end.*
not damaged.

Ensure lintel is fully bedded

on bricklaying mortar.

Structural opening
or clear span.

Ensure lintel is level along its width.

In cavity walls, raise inner and outer leaves
supported by lintel together.

Masonry above lintels should be allowed

Ensure wall dimensions are correct.
to cure before applying floor or roof loads.

* For advice on installations where end bearings

Ensure that masonry overhang does not can be reduced to not less than 100mm, please
exceed 25mm. contact Catnic Technical Services Department
on 029 2033 7900.

Ensure no more than half the safe working load

(SWL) is carried by the outer leaf where the lintel
carries an external cavity wall. The wall should also
be restrained laterally near the top.
Inner Leaf Cavity Outer Leaf

Additional notes
Do Do not
Install a separate DPC in severe exposure conditions. Use damaged lintels
A Catnic Cougar Open Back or Classic Combined Box
Apply point loads without prior consultation. Where the
lintel with an additional DPC membrane installed in
loading or a substantial part of it is applied as
accordance with normal practice provides the best
concentrated loads, each concentrated load must be
possible protection (page 58)
supported over a length of lintel of not less than 200mm.
Locate the window/door frame so that the drip on the In such cases, the total loading must not produce
front of the lintel projects forward of the drip on the front bending moments or shear forces greater than those
of the frame. It is good building practice to insert a produced by the uniformly distributed loads specified in
flexible joint between the lintel and the top of the frame the relevant data tables
Ensure that timber floor joists and roof trusses have a Allow blockwork to overhang the lintel by more
full block depth between them and the lintel flange on than 25mm
Cougar Open Back Lintels
Apply concrete floor loads without ensuring that the total
Refer to the Catnic How to Install a Lintel Supporting loads are checked by a structural engineer, or by Catnic
Concrete Floors or the Steel Lintel Manufacturers Technical Services
Association guidelines (available on request) when using
Do not cut CG or CGH type lintels under any
Classic Combined Box or CL & CU Open Back Lintels to
circumstances
support concrete floors
Apply point loads directly on lintel flanges
Consider the use of our soffit cladding for all coastal
sites (refer to page 56 & 57)

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Installing a Lintel Supporting Concrete Floors

Block inner leaf

In addition to the cavity wall installation guide, please
read the following for installing concrete floors with
Catnic steel lintels. Concrete floor

Check that the correct lintel is being used according

to the manufacturers lintel schedule/design criteria

Bed the lintel on full blocks and allow mortar to cure

before applying concrete floor loads

Raise both leaves of cavity wall together and allow

masonry to cure sufficiently before applying heavy
loads. Alternatively prop the lintel if large loads are to
be applied to fresh masonry

Lintel
Brick outer leaf

Typical CU Lintel, supporting a concrete floor

When using the Catnic CL & CU Open back range

with concrete floors, always ensure that the
blockwork is built tight against the inner vertical face
of the lintel, and that a mortar joint is added to the
top of the blockwork so that the floor units have an
even spread over the inner flange of the lintel

Avoid shock loading lintels during the installation of

Continuous concrete floor units and also any sideways loading
solid infill
while being lifted into position
block
Precast flooring units should be laid on a mortar
bearing of the full inner leaf wall width and should
not be dragged over supports

Avoid loading newly laid floors with building materials

Lintels must be built-in as illustrated, ensuring that the
blockwork infill is well-jointed during construction and
Catnic CU Open Back Lintel compatible with the strength of the masonry above

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Cavity Wall Lintels

Two styles available for use in cavity wall construction:
Catnic Cougar Open Back lintels & CU lintels
incorporate insulation, built-in plaster key
and built-in DPC.

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Cougar Open Back Lintels

Typical applications
CG
Triangulated masonry load
Supporting uniformly distributed masonry load
Supporting uniformly distributed timber floor and
roof loads
Suitable for fair faced inner leaf masonry

CGH
As above plus:
Increased loading conditions CG Lintel
Uneven loading situations
Nominal point loading eg. stair trimmers, stud
partition supports, etc.

CL & CU
As above plus:
Supports concrete floors
Attic truss loads CU Lintel
Benefits
Larger span multiple truss loads
Materials used in Lintels
The CG, CGH, CL and CU ranges are formed from
Conditions of use
galvanised steel, then powder coated
Nominal 150mm end bearings
Both leaves are raised together
Integral insulation
One course of block prior to installation of floor/roof
Maximising thermal efficiency, minimising cold bridging
Refer to Installing a cavity wall lintel (page 12)

Note: For a definition of these terms see the Glossary Duplex corrosion protection
of Technical Terms on page 62 Ensures optimum durability and longevity

Easy-to-use open back profile

Allows masonry to be built up continuously on both
outer and inner leaf
Typical Catnic Cougar lintel over a timber window

Built-in DPC
Saves time in construction, and means cavity is easy to
clean without risk of damage to DPC (refer to page 58)

Built-in plaster key

With staggered slots applied to the inner flange and
ribbed underside of insulation (perforated steel
baseplate on CL and CU range)

Accessories
ArchCentres, Stop Ends, Cavity Weep Vents, Soffit
Cladding (refer to page 54)

NOTE: Whilst the above information is intended to offer general guidance regarding typical applications, it should not be considered as comprehensive. Requirements not fully covered
by the above should be referred to our technical services department for individual consideration.

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Suitability of cavity wall lintels to meet the stipulated

thermal performance requirements of Part L1 & L2
of the Building Regulations Approved Document.
Lintel Design Feature Requirement
1 Without base plate No restrictions on usage
2 With a perforated base plate Effective conductivity value of the steel must not
exceed 30W/mK
3 With a continuous solid base plate Internal steel soffit area to be suitably lined with insulation
of minimum R value of 0.34m2 K/W

To meet the bridging requirements on thermal issues is

dependent on the window frame position and the base
feature design.

1 Open Back Lintel (without base plate)

CG & CGH
Catnics standard range of open back lintels are
Partial (or Full Fill)
Insulation available with and without perforated steel base plates.
Inside face of window The unique design of the companys open back lintels
head to overlap inside 30 Min.
face of outer wall by incorporate a perforated steel base plate to help
30mm minimum
minimise cold bridging without affecting structural
Lightweight plaster or performance.
plasterboard

Catnic undertook its own assessment using a two

dimensional steady state heat flow analysis on the full
Sealant required to front and
back of window head standard range of cavity wall perforated lintels with the
window frame overlapping the cavity by 30mm.
2 Open Back Lintel (with perforated base plate) The results confirmed that the critical effective
CL & CU
conductivity value is not exceeded and that Catnics
Partial (or Full Fill) standard lintels offer complete compliance with the
Insulation
requirements of the Approved Documents.
Inside face of window
head to overlap inside 30 Min.
face of outer wall by For designs incorporating lintels with unperforated base
30mm minimum
Lightweight plaster or plates, suitable insulated lining is required.
plasterboard

For all applications a sealant should be provided at front

and back of the window frame to improve air tightness.
Sealant required to front and
back of window head

3 Open Back Lintel (with solid base plate)

Partial (or Full Fill)

Insulation

Inside face of window

head to overlap inside
face of outer wall by
30mm minimum 30 Min.

Lightweight plaster or
plasterboard

Insulated plasterboard
(Gyproc Thermal Board
LD or similar approved)
to soffit area

Sealant required to front and

back of window head

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Cavity Walls 100 48 95

100 48 95

Cougar Open Back

Continuous
nominal h solid infill
height (see h block
tables below)
For 50-65mm Cavity 100-115mm Inner Leaf
CG & CGH CL & CU

All ratios are shown inner to outer

CG50/100
Standard lengths (mm) 750-1500 1650-1800 1950-2100 2250-2400 2550-2700 2850-3000 3300-3900
SWL 1:1/3:1 (kN) 15 18 20 22 26 26 26
Weight (kg/m) 5.80 7.34 7.96 8.59 9.84 12.29 16.02
Nominal height h (mm) 140 140 160 180 220 220 220

CGH50/100
Standard lengths (mm) 900-1200 1350-1500 1650-1800 1950-2100
SWL 1:1/3:1 (kN) 23 29 34 40
Weight (kg/m) 9.5 11.1 14.2 16.2
Nominal height h (mm) 140 180 180 220

CLA50/100 CLB50/100 CUB50/100

Standard lengths (mm) 900-1800 1500-2100 2250-2400 900-2700 2850-3000
SWL 1:1/19:1 (kN) 29 44 40 58 47
Weight (kg/m) 10.47 13.09 13.09 15.95 15.95
Nominal height h (mm) 157 157 157 232 232

CU50/100
Standard lengths (mm) 2100-3000 3300-3900 4200-4800 Note: To achieve the CL & CU loading
figures indicated, lintels must be built-in
SWL 1:1/19:1 (kN) 74 47 29 as illustrated, ensuring that the blockwork
infill is well-jointed during construction and
Weight (kg/m) 19.4 19.4 19.4 compatible with the strength of the
masonry above.
Nominal height h (mm) 232 232 232

Standard lengths are available in increments of 150mm at lengths up to 3000mm, 300mm at lengths from 3000mm 4800mm (including 4575mm, but excluding 4500mm).
The SWL (safe working load) is based on the total UDL (uniform distributed load) over maximum span using 150mm end bearings.

Continuous
solid infill
Continuous block
solid infill
block

CG & CGH Lintels CL Lintel CU Lintel

Concrete Floor Loads

When using the Catnic CL and CU Open Back ranges with concrete floors, always ensure that the blockwork is built tight against the inner vertical face of the lintel, and that a mortar joint
is added to the top of the blockwork so that the floor units have an even spread over the inner flange of the lintel. For guidance on installation refer to page 13.

18 Lintel Product Selector

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Cavity Walls 125 48 95

125 48 95

Cougar Open Back Wide Inner Leaf

nominal Continuous
height (see h solid infill
h
tables below) block

For 50-65mm Cavity 125-140*mm Inner Leaf

CG & CGH CL & CU

All ratios are shown inner to outer

CG50/125*
Standard lengths (mm) 750-1200 1350-1800 1950-2400 2550-2700 2850-3000
SWL 1:1/3 :1 (kN) 12 17 20 26 26
Weight (kg/m) 6.3 7.78 9.03 12.87 16.55
Nominal height h (mm) 140 140 180 220 220

CGH50/125*
Standard lengths (mm) 900-1200 1350-1500 1650-1800 1950-2100
SWL 1:1/3 :1 (kN) 23 29 34 40
Weight (kg/m) 10.0 11.6 14.8 16.8
Nominal height h (mm) 140 180 180 220

CLA50/125 CLB50/125 CUB50/125

Standard lengths (mm) 900-1800 1500-2100 2250-2400 900-2700 2850-3000
SWL 1:1/19:1 (kN) 29 44 40 58 47
Weight (kg/m) 10.69 13.36 13.36 16.24 16.24
Nominal height h (mm) 157 157 157 232 232

CU50/125
Standard lengths (mm) 2100-3000 3300-3900 4200-4800 Note: To achieve the CL & CU loading
figures indicated, lintels must be built-in
SWL 1:1/19:1 (kN) 74 47 29 as illustrated, ensuring that the blockwork
infill is well-jointed during construction and
Weight (kg/m) 19.76 19.76 19.76 compatible with the strength of the
masonry above.
Nominal height h (mm) 232 232 232

Standard lengths are available in increments of 150mm at lengths up to 3000mm, 300mm at lengths from 3000mm 4800mm (including 4575mm, but excluding 4500mm).
The SWL (safe working load) is based on the total UDL (uniform distributed load) over maximum span using 150mm end bearings.

* For applications incorporating 140mm solid aggregate concrete blocks, contact our Technical Services Department on 029 2033 7900

Continuous
solid infill
Continuous block
solid infill
block

CG & CGH Lintels CL Lintel CU Lintel

Concrete Floor Loads

When using the Catnic CL & CU Open Back range with concrete floors, always ensure that the blockwork is built tight against the inner vertical face of the lintel, and that a mortar joint
is added to the top of the blockwork so that the floor units have an even spread over the inner flange of the lintel. For guidance on installation refer to page 13.

Lintel Product Selector 19

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Cavity Walls 100 68 95

100 68 95

Cougar Open Back

Continuous
solid infill
nominal h h
block
height (see
For 70-85mm Cavity 100-115mm Inner Leaf tables below)

CG & CGH CL & CU

All ratios are shown inner to outer

CG70/100
Standard lengths (mm) 750-1500 1650-1800 1950-2100 2250-2400 2550-2700 2850-3000 3300-3900
SWL 1:1/3 :1 (kN) 15 18 20 22 26 26 26
Weight (kg/m) 5.98 7.48 8.1 8.7 9.98 12.46 16.29
Nominal height h (mm) 140 140 160 180 220 220 220

CGH70/100
Standard lengths (mm) 900-1200 1350-1500 1650-1800 1950-2100
SWL 1:1/3 :1 (kN) 23 29 34 40
Weight (kg/m) 9.7 11.3 14.5 16.5
Nominal height h (mm) 140 180 180 220

CLA70/100 CLB70/100 CUB70/100

Standard lengths (mm) 900-1800 1500-2100 2250-2400 900-2700 2850-3000
SWL 1:1/19:1 (kN) 29 44 40 58 47
Weight (kg/m) 10.9 13.62 13.62 16.42 16.42
Nominal height h (mm) 157 157 157 232 232

CU70/100
Standard lengths (mm) 2100-3000 3300-3900 4200-4800 Note: To achieve the CL & CU loading
figures indicated, lintels must be built-in
SWL 1:1/19:1 (kN) 74 47 29 as illustrated, ensuring that the blockwork
infill is well-jointed during construction and
Weight (kg/m) 19.91 19.91 19.91 compatible with the strength of the
masonry above.
Nominal height h (mm) 232 232 232

Standard lengths are available in increments of 150mm at lengths up to 3000mm, 300mm at lengths from 3000mm 4800mm (including 4575mm, but excluding 4500mm).
The SWL (safe working load) is based on the total UDL (uniform distributed load) over maximum span using 150mm end bearings.

Continuous
solid infill
block
Continuous
solid infill
block

CG & CGH Lintels CL Lintel CU Lintel

Concrete Floor Loads

When using the Catnic CL and CU Open Back ranges with concrete floors, always ensure that the blockwork is built tight against the inner vertical face of the lintel, and that a mortar joint
is added to the top of the blockwork so that the floor units have an even spread over the inner flange of the lintel. For guidance on installation refer to page 13.

20 Lintel Product Selector

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Cavity Walls 125 68 95

125 68 95

Cougar Open Back Wide Inner Leaf

Continuous
nominal
h solid infill
height (see h
block
tables below)
For 70-85mm Cavity 125-140*mm Inner Leaf
CG & CGH CL & CU
All ratios are shown inner to outer

CG70/125*
Standard lengths (mm) 750-1200 1350-1800 1950-2400 2550-2700 2850-3000
SWL 1:1/3 :1 (kN) 12 17 20 26 26
Weight (kg/m) 6.33 7.95 9.18 13.07 16.9
Nominal height h (mm) 140 140 180 220 220

CGH70/125*
Standard lengths (mm) 900-1200 1350-1500 1650-1800 1950-2100
SWL 1:1/3 :1 (kN) 23 29 34 40
Weight (kg/m) 10.2 11.8 15.1 17.1
Nominal height h (mm) 140 180 180 220

CLA70/125 CLB70/125 CUB70/125

Standard lengths (mm) 900-1800 1500-2100 2250-2400 900-2700 2850-3000
SWL 1:1/19:1 (kN) 29 44 40 58 47
Weight (kg/m) 11.12 13.9 13.9 16.71 16.71
Nominal height h (mm) 157 157 157 232 232

CU70/125
Standard lengths (mm) 2100-3000 3300-3900 4200-4800 Note: To achieve the CL & CU loading
figures indicated, lintels must be built-in
SWL 1:1/19:1 (kN) 74 47 29 as illustrated, ensuring that the blockwork
infill is well-jointed during construction and
Weight (kg/m) 20.27 20.27 20.27 compatible with the strength of the
Nominal height h (mm) 232 232 232 masonry above.

Standard lengths are available in increments of 150mm at lengths up to 3000mm, 300mm at lengths from 3000mm 4800mm (including 4575mm, but excluding 4500mm).
The SWL (safe working load) is based on the total UDL (uniform distributed load) over maximum span using 150mm end bearings.

* For applications incorporating 140mm solid aggregate concrete blocks, contact our Technical Services Department on 029 2033 7900

Continuous
solid infill
Continuous block
solid infill
block

CG & CGH Lintels CL Lintel CU Lintel

Concrete Floor Loads

When using the Catnic CL and CU Open Back ranges with concrete floors, always ensure that the blockwork is built tight against the inner vertical face of the lintel, and that a mortar joint
is added to the top of the blockwork so that the floor units have an even spread over the inner flange of the lintel. For guidance on installation refer to page 13.

Lintel Product Selector 21

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Cavity Walls 100 88 95

100 88 95

Cougar Open Back

Continuous
nominal
h solid infill
height (see h
block
tables below)
For 90-105mm Cavity 100-115mm Inner Leaf
CG & CGH CL & CU
All ratios are shown inner to outer

CG90/100
Standard lengths (mm) 750-1500 1650-1800 1950-2100 2250-2400 2550-2700 2850-3000 3300-3900
SWL 1:1/3 :1 (kN) 15 18 20 22 26 26 26
Weight (kg/m) 6.13 7.63 8.26 8.88 10.15 12.96 16.6
Nominal height h (mm) 140 140 160 180 220 220 220

CGH90/100
Standard lengths (mm) 900-1200 1350-1500 1650-1800 1950-2100
SWL 1:1/3 :1 (kN) 23 29 34 40
Weight (kg/m) 10.0 11.6 14.8 16.8
Nominal height h (mm) 140 180 180 220

CLA90/100 CLB90/100 CUB90/100

Standard lengths (mm) 900-1800 1500-2100 2250-2400 900-2700 2850-3000
SWL 1:1/19:1 (kN) 29 44 40 58 47
Weight (kg/m) 11.24 14.05 14.05 16.93 16.93
Nominal height h (mm) 157 157 157 232 232

CU90/100
Standard lengths (mm) 2100-3000 3300-3900 4200-4800 Note: To achieve the CL & CU loading
figures indicated, lintels must be built-in
SWL 1:1/19:1 (kN) 74 47 29 as illustrated, ensuring that the blockwork
infill is well-jointed during construction and
Weight (kg/m) 20.48 20.48 20.48 compatible with the strength of the
Nominal height h (mm) 232 232 232 masonry above.

Standard lengths are available in increments of 150mm at lengths up to 3000mm, 300mm at lengths from 3000mm 4800mm (including 4575mm, but excluding 4500mm).
The SWL (safe working load) is based on the total UDL (uniform distributed load) over maximum span using 150mm end bearings.

Continuous
solid infill
block
Continuous
solid infill
block

CG & CGH Lintels CL Lintel CU Lintel

Concrete Floor Loads

When using the Catnic CL and CU Open Back ranges with concrete floors, always ensure that the blockwork is built tight against the inner vertical face of the lintel, and that a mortar joint
is added to the top of the blockwork so that the floor units have an even spread over the inner flange of the lintel. For guidance on installation refer to page 13.

22 Lintel Product Selector

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Cavity Walls
125 88 95

125 88 95

Cougar Open Back Wide Inner Leaf nominal

Continuous
height (see h
solid infill
tables below)
block

For 90-105mm Cavity 125-140*mm Inner Leaf

CG & CGH CL & CU

All ratios are shown inner to outer

CG90/125*
Standard lengths (mm) 750-1200 1350-1800 1950-2400 2550-2700 2850-3000
SWL 1:1/3:1 (kN) 12 17 20 26 26
Weight (kg/m) 6.5 8.13 9.36 13.28 17.2
Nominal height h (mm) 140 140 180 220 220

CGH90/125*
Standard lengths (mm) 900-1200 1350-1500 1650-1800 1950-2100
SWL 1:1/3:1 (kN) 23 29 34 40
Weight (kg/m) 10.4 12.0 15.4 17.4
Nominal height h (mm) 140 180 180 220

CLA90/125 CLB90/125 CUB90/125

Standard lengths (mm) 900-1800 1500-2100 2250-2400 900-2700 2850-3000
SWL 1:1/19:1 (kN) 29 44 40 58 47
Weight (kg/m) 11.46 14.32 14.32 17.22 17.22
Nominal height h (mm) 157 157 157 232 232

CU90/125
Standard lengths (mm) 2100-3000 3300-3900 4200-4800 Note: To achieve the CL & CU loading
figures indicated, lintels must be built-in
SWL 1:1/19:1 (kN) 74 47 29 as illustrated, ensuring that the blockwork
infill is well-jointed during construction and
Weight (kg/m) 20.85 20.85 20.85
compatible with the strength of the
Nominal height h (mm) 232 232 232 masonry above.

Standard lengths are available in increments of 150mm at lengths up to 3000mm, 300mm at lengths from 3000mm 4800mm (including 4575mm, but excluding 4500mm).
The SWL (safe working load) is based on the total UDL (uniform distributed load) over maximum span using 150mm end bearings.

* For applications incorporating 140mm solid aggregate concrete blocks, contact our Technical Services Department on 029 2033 7900

Continuous
solid infill
Continuous block
solid infill
block

CG & CGH Lintels CL Lintel CU Lintel

Concrete Floor Loads

When using the Catnic CL and CU Open Back ranges with concrete floors, always ensure that the blockwork is built tight against the inner vertical face of the lintel, and that a mortar joint
is added to the top of the blockwork so that the floor units have an even spread over the inner flange of the lintel. For guidance on installation refer to page 13.

Lintel Product Selector 23

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Lintel Selector - Box Lintels

The following classic range of lintels have been

superseded by the newly launched stocked lintel range,
which can be seen on pages 18-23. Price and delivery
of these lintels available on application.

CN3C - CN4C - CN7C - CN8C - CN11C - CN12C -

CN14C - CN43C - CN44C - CN57C - CN58C

For advice on a suitable lintel for your required

application and any further questions regarding the
range, please contact Catnic Technical Services
on 029 2033 7900

Classic Combined Box Wide Outer Leaf

For 140-150mm Outer Leaf 50mm Cavity 100-115mm Inner Leaf

CN42C
Standard lengths (mm) 750-4200
100 50 130
SWL 1:1/5:1 (kN) 29
Weight (kg/m) 20.5
nominal
h
height (see
Nominal height h (mm) 219 tables below)

Ixx (cm4) 1834

CN42
Zxx (cm3) 143
All ratios are shown inner to outer

Serviceability moment (kNm) 23.2

For 140-150mm Outer Leaf 75mm Cavity 100-115mm Inner Leaf

CN99/124C
Standard lengths (mm) 750-4200
100 70 130

SWL 1:1/5:1 (kN) 29

Weight (kg/m) 20.61 nominal
height (see h
tables below)
Nominal height h (mm) 219
Ixx (cm4) 1825 CN99/124

Zxx (cm3) 134 All ratios are shown inner to outer

Serviceability moment (kNm) 21.8

Standard lengths are available in increments of 150mm at lengths up to 3000mm, 300mm at lengths from 3000mm 4200mm
The SWL (safe working load) is based on the total UDL (uniform distributed load) over maximum span using 150mm end bearings.

24 Lintel Product Selector

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Cavity Wall CXL Fabricated Lintels

A range of lintels designed for use in cavity
wall construction for extreme loading
conditions.

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CXL Lintels

Lintels for extreme loads

Designed for external cavity walls when extreme loads
are imposed

Longer spans
High loads at longer spans

Varying widths
Suits a variety of wall widths with special widths
on application

Material used Built-in plaster key

Supplied in post galvanised finish. Lintels manufactured As an optional extra, CXL lintels can be supplied with
from a universal beam section and 6.0mm structural expanded metal mesh secured to the base plate.
grade steel plate Grade S275 to BSEN 10025:2004
and hot dip galvanised after manufacture to BSEN Load ratios
ISO1461:1999. To achieve the loading figures shown, the lintel must
be laterally restrained and have 200mm end bearing
Standard increment lengths supports and inner to outer load ratios between
Overall lengths are available in 150mm increments for 5:1 and 19:1.
lengths up to 3000mm, and in 300mm increments for
lengths from 3000mm to 6600mm. For longer lengths Separate DPC
to support heavy loads, please refer to our Technical A separate flexible DPC must be installed during
Services Department on 029 2033 7900. construction.

Applications

Lintel codes Inner Leaf Cavity Outer Leaf

CXL240 100-115 50 102
CXL265 125-140 50 102
CXL265 100-115 70 102
CXL290 125-140 70 102
CXL290 100-115 90 102
Note: For other cavity wall constructions please contact our Technical Services
Department on 029 2033 7900.

26 Lintel Product Selector

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Cavity Walls
133 133 133

213 6 213 6 213 6

6 6 6
234 259 284

For 50mm Cavity 100-115mm Inner Leaf 240 265 290

CXL240 CXL265 CXL290

CXL240
Standard lengths (mm) 2100-3000 3300-4800 5100 5400 5700 6000 6300 6600
SWL 5:1/19:1(kN) 88 83 78 71 64 56 52 47
Weight (kg/m) 41.1 41.1 41.1 41.1 41.1 41.1 41.1 41.1
Ixx (cm ) 4
4051 4051 4051 4051 4051 4051 4051 4051
Zxx (cm3) 303 303 303 303 303 303 303 303
Serviceability moment (kNm) 50 50 50 50 50 50 50 50
Allowable reaction (kN) 68 68 68 68 68 68 68 68

For 70mm Cavity 100-115mm Inner Leaf

50mm Cavity 125-140mm Inner Leaf
CXL265
Standard lengths (mm) 2100-3000 3300-4800 5100 5400 5700 6000 6300 6600
SWL 5:1/19:1 (kN) 88 83 78 71 64 56 52 47
Weight (kg/m) 42.3 42.3 42.3 42.3 42.3 42.3 42.3 42.3
Ixx (cm4) 4139 4139 4139 4139 4139 4139 4139 4139
Zxx (cm ) 3
305 305 305 305 305 305 305 305
Serviceability moment (kNm) 50.3 50.3 50.3 50.3 50.3 50.3 50.3 50.3
Allowable reaction (kN) 68 68 68 68 68 68 68 68

For 90mm Cavity 100-115mm Inner Leaf

70mm Cavity 125-140mm Inner Leaf
CXL290
Standard lengths (mm) 2100-3000 3300-4800 5100 5400 5700 6000 6300 6600
SWL 5:1/19:1 (kN) 88 83 78 71 64 56 52 47
Weight (kg/m) 43.5 43.5 43.5 43.5 43.5 43.5 43.5 43.5
Ixx (cm ) 4
4222 4222 4222 4222 4222 4222 4222 4222
Zxx (cm3) 307 307 307 307 307 307 307 307
Serviceability moment (kNm) 50.6 50.6 50.6 50.6 50.6 50.6 50.6 50.6
Allowable reaction (kN) 68 68 68 68 68 68 68 68

The SWL (safe working load) is based on the total UDL (uniform distributed load) over maximum span using 200mm end bearings.

Lintel Product Selector 27

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Cavity Wall Eaves Lintels

Two styles available for use in cavity wall construction
for closed eaves applications: Catnic Cougar Open
Back and Classic Combined Box eaves lintels
incorporating insulation and built-in plaster key.

28 Lintel Product Selector

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Closed Eaves Lintels

Eaves Lintels
Closed eaves lintels are manufactured from
galvanised steel and powder coated for extra
protection. Available in both Cougar open back or
Classic box styles

Integral insulation
Maximising thermal efficiency, minimising
cold bridging

Extra corrosion protection

Ensures optimum durability and longevity

Easy-to-use open back profile

Open back style lintels allow masonry to be built
up continuously on inner leaf

Built-in plaster key

With staggered slots to the inner flange and ribbed
underside of insulation

Extended durability
Duplex system providing twice the protection

To achieve the stated safe working load (SWL), closed

eaves lintels must be built in with solid blockwork and
continuous timber wall-plates.
Allow 150mm at each end for bearing support.

Lintel Product Selector 29

9616 Catnic Lintel Brochure 2/8/06 12:44 Page 30

Closed Eaves
Cougar Open Back

For 50-85mm Cavity 100-115mm Inner Leaf

CGE50/100
Standard lengths (mm) 750-1500 1650-2100 2400 2700 100 48 60

SWL (kN)* 25 22 20 20
h
Weight (kg/m) 7.0 8.0 10.2 10.2
Nominal height h (mm) 95 115 115 115 CGE50/100

Lengths of 2250mm and 2550mm are not available.

For 50-85mm Cavity 125-140mm Inner Leaf

CGE50/125
Standard lengths (mm) 900-1500 1650-2100 2400 2700 125 48 60

SWL (kN)* 25 25 25 25
h
Weight (kg/m) 8.3 9.3 11.9 11.9
Nominal height h (mm) 115 140 140 140 CGE50/125

Lengths of 2250mm and 2550mm are not available.

For 90-105mm Cavity 100-115mm Inner Leaf

CGE90/1000
100 88 60
Standard lengths (mm) 750-1500 1650-2100 2400 2700
SWL (kN)* 25 22 20 20
h
Weight (kg/m) 7.7 8.3 10.7 10.7
Nominal height h (mm) 95 115 115 115 CGE90/100

Lengths of 2250mm and 2550mm are not available.

For 90-105mm Cavity 125-140mm Inner Leaf

CGE90/125
125 88 60
Standard lengths (mm) 900-1500 1650-2100 2400 2700
SWL (kN)* 25 25 25 25
h

Weight (kg/m) 8.8 9.7 11.7 11.7

Nominal height h (mm) 115 140 140 140 CGE90/125

Lengths of 2250mm and 2550mm are not available.

Standard lengths are available in increments of 150mm, except for 2250mm and 2550mm.
*To achieve the stated safe working load (SWL), closed eaves lintels must be built in with solid blockwork and continuous timber wall-plates. Allow 150mm at each end for bearing support.

30 Lintel Product Selector

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Closed Eaves
Classic Box

Typical applications
Universal application caters for all loading conditions
Direct roof loading
Attic truss loads
Supports point loads e.g. multiple trusses

For 50-75mm Cavity 100mm Inner Leaf

CN55A
Standard lengths (mm) 900 &1200 1500 1650-2100 2400&2700
SWL (kN) 30 30 25 20
Weight (kg/m) 9.0 9.0 9.0 9.0
100 75
Standard lengths are available in increments of 150mm.
For lengths over 2700mm please contact Technical Services.

143

CN55C CN55

Standard lengths (mm) 900 &1200 1500 1650-2100 2400&2700

SWL (kN) 50 50 40 30
Weight (kg/m) 12.8 12.8 12.8 12.8

Standard lengths are available in increments of 150mm.

For lengths over 2700mm please contact Technical Services.

Eaves Lintel

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Timber Frame Lintels

The Catnic lintel range for use in timber frame
construction consists of single and double
element lintels with a sloping outer face
and Duplex corrosion protection which
together provide a built-in DPC.

32 Lintel Product Selector

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Catnic Timber Frame Lintels

Duplex corrosion protection

Ensures optimum durability

Restraint clips
Allows vertical differential movement of timber frame

Accessories
ArchCentres, Stop Ends, Cavity Weep Vents,
Soffit Cladding (refer to page 57)

Lintel restraint clips installation details

Lintels for timber frame construction are supplied with lintel restraint clips (free of charge), which must be screw or
nail fixed to the timber frame, to allow for differential movement between the timber structure and the brick facing.

Note: lintels should be suitably propped during construction

Lintel Number
Lintel code Length (mm) Clip fixings Length (mm) of clips
CTF5, 6 & 7 750-3600 50mm x 3.35mm diam. Plain head galvanised nails Up to 1800 3
CTF5, 6 & 7 3900-4800 38mm x No10 RD/HD sherardised wood screws 1950-3000 5
CN23 Up to 4800 38mm x No10 RD/HD sherardised wood screws 3300-4200 7
4575-4800 9

CTF5 Lintel CN23 Lintel

Lintel Product Selector 33

9616 Catnic Lintel Brochure 2/8/06 12:45 Page 34

38 95

Cavity Walls
47 95 60 95 67 95

Timber Frame
h h h h

For 102 Outer Leaf 50-60mm Cavity

CTF5 CTF6 CTF7 CN23

CTF5
Standard lengths (mm) 750-1200 1350-1500 1650-2400 2550-3000 3300-3600 3900-4800
SWL (kN) 4 5 7 7 9 10
Weight (kg/m) 3.8 4.8 5.6 7.2 8.0 9.0
Nominal height h (mm) 128 128 183 183 218 256

For 102 Outer Leaf 60-70mm Cavity

CTF6
Standard lengths (mm) 750-1200 1350-1500 1650-2400 2550-3000 3300-3600 3900-4800
SWL (kN) 4 5 7 7 9 10
Weight (kg/m) 4.48 5.6 5.88 7.28 8.03 9.05
Nominal height h (mm) 170 170 187 187 222 265

For 102 Outer Leaf 70-80mm Cavity

CTF7
Standard lengths (mm) 750-1200 1350-1500 1650-2400 2550-3000 3300-3600 3900-4800
SWL (kN) 4 5 7 7 9 10
Weight (kg/m) 4.18 5.23 5.88 7.52 8.29 9.35
Nominal height h (mm) 145 145 187 187 218 265

For 102 Outer Leaf 35-60mm Cavity

CN23B CN23C
Standard lengths (mm) 750-3600 3900-4800
SWL (kN) 10 10
Weight (kg/m) 12.8 16.3
Nominal height h (mm) 268 268

Standard lengths are available in increments of 150mm at lengths up to 3000mm, 300mm at lengths from 3000mm 4800mm.
The SWL (safe working load) is based on the total UDL (uniform distributed load) over maximum span using 150mm end bearings.

34 Lintel Product Selector

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Installing a Timber Frame Lintel

In addition to the cavity wall installation guide,

please read the following for Catnic timber frame
lintel installation.

When propping, a horizontal board should be placed The prop can be removed after the mortar has cured
along the flat underside of the lintel soffit; this will and the wall ties become effective.
prevent any point loading, which could cause localised
A timber pinch batten should be fixed at the heel of the
deformation of the lintel flange.
timber frame lintel in order to minimise any rotation.
On small openings a single prop should be placed
Catnic timber frame lintels (e.g. CTFs) are intended only
centrally within the opening and gently wedged into place.
to support an outer skin of brickwork where it is tied to
The number of props should be increased for larger an inner skin of timber frame and must be suitably
openings. Generally props should be installed at propped during construction.
maximum centres of 1 metre.

Overall lintel length

300 600 600 300
Typical application showing max max max max
lintel over window

Centre of lintel

Position of lintel restraint clips

Pinch batten Lintels for timber frame construction are supplied with
lintel restraint clips (free of charge), which must be
Timber frame screw or nail fixed to the timber frame, as shown on
page 33, to allow for differential movement between the
timber structure and the brick facing.

Screw fixing Screw or nail Lintel Number

Nail fixing fixings Length (mm) of clips
(refer to table
Lintel for usage)
Up to 1800 3

Clearance 1950-3000 5

Clearance 3300-4200 7
Brick outer leaf 4575-4800 9

Lintel code Length (mm) Clip fixings

CTF5, 6 & 7 750-3600 50mm x 3.35mm diam. Plain head galvanised nails
CTF5, 6 & 7 3900-4800 38mm x No10 RD/HD sherardised wood screws
CN23 Up to 4800 38mm x No10 RD/HD sherardised wood screws

Lintel Product Selector 35

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External Solid Wall Lintels

The Catnic lintel for external solid walls comes in
three forms, a single element lintel designed to
carry a single leaf of brickwork, a two-piece lintel
shaped to carry the two separate leaves of a
215mm fairface brick wall and a box profile
with a toe for use in solid brick
or block walls 200mm to
215mm thick.

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External Solid Wall Lintels

Integral insulation
Maximising thermal efficiency

Staggered slots
Minimises cold bridging

Duplex corrosion protection

Ensuring optimum durability

Integral plaster key

Ensures excellent plaster adhesion and safety on site

Savings on brickwork and insulation

Due to box profile savings can be made

Box section
Resists twisting during construction
External Solid Wall CN71 Lintel

Instant full load use

Box profile is designed to carry full load of wet
masonry as soon as it is installed

Typical application showing lintel profile in external solid wall

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External Solid Wall Lintels

100 95

h nominal
For 200 & 215mm Exterior Solid Walls height (see
tables below)

CN71 & CN81 & CN99/394

CN71A CN71C
Standard lengths (mm) 750-1500 1650-2100 2250-2700 900-1500 1650-1950
SWL (kN) 29 27 20 49 44
Weight (kg/m) 9.3 9.3 9.3 14.6 14.6
Nominal height h (mm) 143 143 143 143 143

CN81B CN81C
Standard lengths (mm) 2100-3600 2100-2700 2850-3300 3600 3900-4575 4800
SWL (kN) 29 54 47 39 29 26
Weight (kg/m) 15.1 18.5 18.5 18.5 18.5 18.5
Nominal height h (mm) 219 219 219 219 219 219

CN99/394C
Standard lengths (mm) 3000-3300 3600-3900 4200-4800
SWL (kN) 54 51 49
Weight (kg/m) 22.3 22.3 22.3
Nominal height h (mm) 295 295 295

Standard lengths are available in increments of 150mm at lengths up to 3000mm, 300mm at lengths from 3000mm 4800mm (including 4575mm, but excluding 4500mm).
The SWL (safe working load) is based on the total UDL (uniform distributed load) over maximum span using 150mm end bearings.

For solid wall construction in

excess of 250mm an
appropriate Cougar Open Back
Lintel can be utilised.
Please refer to pages 18-23 for the
appropriate lintel profile.

CG Lintel installed in solid CN81 Lintel

wall construction

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55

External Solid Wall Lintels h h

h

100 91 182

For 102 & 215mm Exterior Solid Walls CN48 & CN49 CNZ94, CNZ95, CN50 & CN51
CNZ96 & CNZ97

CN48C CN49C
Standard lengths (mm) 750-1800 1950-2700
SWL (kN) 15 20
Weight (kg/m) 7.5 9.3
Nominal height h (mm) 154 229

Lintels CN48 and CN49 should be suitably propped and laterally restrained during construction.
To achieve loading figures, lintels must be constructed with brickwork (blockwork) fully built-in as shown.

CNZ94A CNZ94C CNZ95C

Standard lengths (mm) 750 & 1350 900-1500 1650-2100
SWL (kN) 8 5 7
Weight (kg/m) 2.7 4.4 5.4
Nominal height h (mm) 88 91 131

CNZ96C CNZ97C
Standard lengths (mm) 2250-2400 2550-2700
SWL (kN) 10 15
Weight (kg/m) 6.3 7.5
Nominal height h (mm) 167 215

Lintels CNZ94, CNZ95, CNZ96 and CNZ97 should be suitably propped and laterally restrained during construction.
Profile CNZ94A is designed for use over meter boxes only.

CN50C CN51C
Standard lengths (mm) 750-1800 1950-2700
SWL (kN) 10 12
Weight (kg/m) 9.0 12.7
Nominal height h (mm) 91 167

Standard lengths are availble in increments of 150mm.

CN48 Lintel CNZ96 Lintel CN51 Lintel

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Internal Partition & Loadbearing Wall Lintels

Catnic lintels for internal partitions and loadbearing
walls are available in either corrugated, channel or
box section depending on load and opening.

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Internal Partition & Loadbearing Wall Lintels

Typical applications
CN92 & CN102
Suitable for nominal domestic loading

CN100
As above plus:
Suitable for masonry and timber floor loads
Note: 1800 and 2100mm lengths are not suitable
for floor loads

CN5X & CN6X

As above plus:
Universal application caters for all loading conditions
Direct floor or roof load
Supports concrete floor loads
Supports point loads eg. steel beams, etc.
Optional 4 course profile for high loads at
Corrugated and channel lintels
extended lengths
Offer a cost effective solution for lightweight and
standard duty loads. Use corrugated galvanised steel
CN56X & CN66X
lintels for lightweight structures and channel section
As above plus:
lintels for masonry and timber floors (lintel CN100 has
Suitable for 140mm and 150mm blockwork
an additional polyester powder coating as standard)

Box profiles
Sized to suit brick or block course heights. Use box
profiles for heavier loads and wider openings,
Typical application showing CN5X box profile lintel in 100mm wall
manufactured from galvanised steel with additional
polyester powder coating

Duplex corrosion protection

Ensures optimum durability and longevity

Plaster/mortar keys
Incorporated in all lintels

CN92 Lintel CN102 Lintel CN100 Lintel

NOTE: Whilst the above information is intended to offer general guidance regarding typical applications, it should not be considered as comprehensive.
Requirement not fully covered by the above should be referred to our technical services department for individual consideration.

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Internal Partition & Loadbearing Wall Lintels

75 100

For 75 & 100mm Interior Solid Walls 25 25

68 98

CN92 CN102 CN92 CN102

Standard lengths (mm) 1050-1200 1050-1200

SWL (kN) 7 7
Weight (kg/m) 1.2 1.8

Note: When using CN92 and CN102 lintels normal building practice should be observed, in that one course of blockwork should be laid on
the lintel and the mortar allowed to harden for at least 24 hours before additional loads are applied.

103 (inside)

For 100mm Interior Solid Walls

h nominal
height (see
CN100 tables below)
CN100
Standard lengths (mm) 1050-1200 1350-1500 1800* 2100*
SWL (kN) 10 13 3 3
Weight (kg/m) 4.7 5.9 4.7 4.7
Nominal height h (mm) 50 73 50 50

*Not suitable for floor loads

100

nominal
height (see h
For 100mm Interior Solid Walls tables below)

CN5X & CN6X & CN99/438

CN5XA CN5XC
Standard lengths (mm) 750-1500 1650-2100 2250-2700 750-1500 1650-1950
SWL (kN) 29 25 20 49 39
Weight (kg/m) 7.6 7.6 7.6 12.3 12.3
Nominal height h (mm) 143 143 143 143 143

CN6XB CN6XC
Standard lengths (mm) 2100-3600 2100-2700 2850-3300 3600 3900-4575 4800
SWL (kN) 29 49 39 34 29 26
Weight (kg/m) 12.4 15.7 15.7 15.7 15.7 15.7
Nominal height h (mm) 219 219 219 219 219 219

CN99/438C
Standard lengths (mm) 3000 -3300 3600 - 3900 4200-4800
SWL (kN) 54 51 41
Weight (kg/m) 19.5 19.5 19.5
Nominal height h (mm) 295 295 295

Standard lengths are available in increments of 150mm at lengths up to 3000mm, 300mm at lengths from 3000mm 4800mm (including 4575mm, but excluding 4500mm).
The SWL (safe working load) is based on the total UDL (uniform distributed load) over maximum span using 150mm end bearings.

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Internal Partition & Loadbearing Wall Lintels 140

nominal
height (see h
tables below)
For 140-150mm Interior Solid Walls
CN56X & CN66X & CN99/436

CN56XA CN56XC
Standard lengths (mm) 1050-1500 1650-2700 1200 & 1350 1800 & 2100
SWL (kN) 29 20 49 44
Weight (kg/m) 9.0 9.0 14.5 14.5
Nominal height h (mm) 143 143 143 143

CN66XC
Standard lengths (mm) 1650-2700 2850-3300 3600 3900-4575 4800
SWL (kN) 54 47 39 29 26
Weight (kg/m) 18.0 18.0 18.0 18.0 18.0
Nominal height h (mm) 219 219 219 219 219

CN99/436C
Standard lengths (mm) 3000-3300 3600-3900 4200-4800
SWL (kN) 54 51 49
Weight (kg/m) 23.0 23.0 23.0
Nominal height h (mm) 295 295 295

Standard lengths are available in increments of 150mm at lengths up to 3000mm, 300mm at lengths from 3000mm 4800mm (including 4575mm, but excluding 4500mm).
The SWL (safe working load) is based on the total UDL (uniform distributed load) over maximum span using 150mm end bearings.

CN5X Lintel supporting first floor partition CN56X Lintel over door opening

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Feature Lintels
When buildings require a more unconventional
support solution, Catnic have the expertise to design
and manufacture special and fabricated lintels to suit
a variety of shapes and sizes. These include both the
standard and bespoke fabricated arch lintel ranges
for the use in more creative openings.

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Lintel Product Selector 45

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Catnic - Arches
When you want to make a feature of brickwork you may
need more than a standard lintel, so Catnic offers
both standard and innovative bespoke designs

Standard Arch Lintels

Catnic have a standard range of ten semi-circular arches
specifically designed and manufactured for domestic housing
applications with nominal loadings. These arches offer
considerable flexibility for feature brickwork with clear
spans ranging from 600mm to 1200mm and are available
from stock.

Typical application showing semi-circular

For alternative cavity and masonry widths to those
arched lintel in facing brickwork
shown, please contact our Technical Services Department
on 029 2033 7900.
All arch lintels require a separate DPC installed over

Lintel Type Clear Span (mm) Weight (kg)

Application
150 CCA/600 600 11.79
20mm maximum 20mm maximum
overhang 3 overhang
CCA/630 630 12.26
CCA/900 900 16.53
150 CCA/915 915 16.77
3
Clear Span CCA/1200 1200 21.37 102 50-85 102
115-125 50-65 102
245 150

Lintel Type Clear Span (mm) Weight (kg)

Application
CCB/600 600 12.96
20mm maximum 20mm maximum
150 overhang 3 overhang
CCB/630 630 13.47
CCB/900 900 18.14
CCB/915 915 18.40
Outer
3 Leaf Inner Leaf
150 CCB/1200 1200 23.43 102 90-100 102
115-125 70-85 102

Clear Span Standard semi-circular arches available for domestic

housing applications.
285 150 For alternative cavity and masonry widths, please
contact our Technical Services Department.

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Bespoke Designs
When a building requires a more unconventional support
solution, Catnic is again, one step ahead and has an
experienced feature design engineer dedicated to
providing innovative design solutions to achieve the
architects vision.

Naturally, Catnics technical support team has the breadth

of knowledge and expertise to design lintels for the most
creative of openings, with in-house facilities and skill
to manufacture fabricated lintels to suit countless
configurations.

Various styles of bay window, gothic and apex arches,

bulls-eye and corner feature lintels for domestic and
commercial applications are hand welded and post
galvanised for extra corrosion protection, assuring
lasting quality.

Although the majority of arches are semi-circular, Catnic lintels can often be delivered along with standard lintels
also offer gothic arches for Victorian styled buildings and minimising delays on site. Each lintel, as always, is
apex designs for triangular or diamond shaped openings, manufactured to a high quality standard; hot dip
curved on-plan for bays, in curved walls and also galvanised after manufacture to BS EN ISO 1461:1999
elliptical, parabolic, Arabian and segmental. The list
is endless and there are limitless variations which Feature lintels
Catnic have the capacity to fabricate virtually any While your imagination runs wild with creative openings,
arch specification required. why not be inventive with brickwork too? Catnic has the
expertise to design and manufacture lintels for decorative
A fast and cost effective fabrication service from a unique brick and stone work, for example reduced toe lintels for
and specialised fabrication facility means that bespoke discrete use with cant bricks.

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Fabricated Arch Lintels

Lintel features Semicircular arch

Illustrated are some examples of the more popular
fabricated lintels available.
H
To ensure that the lintel design meets the application the
following information will be required:
Clear opening dimensions R
E
Wall construction
Applied load or plans, sections and elevations A

B
Plaster key requirements (internal and external) E
C

Cavity wall construction Segmental arch

H

E
Inner Leaf
Dim B Cavity
Outer Leaf A

Dim C B
C E
Typically, end bearings are 200mm

Section design required

Semicircular arch
Outside Outside
with upstands

H
Dim Dim
B C
R
Dim C
D
Traditional cavity wall Single leaf support E
application application

D A

B
NOTE: As part of Catnics BS EN ISO 9001:2000, manufacture of fabricated lintels will C E
not commence without a signed (approved) copy of our drawing(s) returned to our
Technical Services Department.

Apex arch
H

B
C E

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Enquiry Form - Fabricated Arch Lintels

Please complete all relevant details and submit to Technical Services on Fax: 029 2086 0135
If you require further information please Tel: 029 2033 7900
Date:
Name:

Customer (full address): Site (full address):

Post Code: Post Code:

Tel No: Tel No:

Fax No: Fax No:

E-mail: E-mail:

Select required Lintel shape (please tick)

Semicircular Arch Segmental arch

R H H

E A E
E A E

Semicircular arch Apex arch

(with upstands)

R H H

D
E A E
E A E

Details required for manufacture (enter relevant information)

Dimensions Wall Construction Application Details
Clear Span A mm
Height of rise H mm Masonry (height above bearing) mm
End Bearing E mm Outer Leaf mm Roof Span (if applicabe) mm
Radius R (if applicabe) mm Cavity Width mm Timber floor Span mm
Downstand D (if applicabe) or
mm Inner Leaf mm Concrete floor Span mm

Load per metre (kN) Inner leaf Outer leaf (Please provide full working drawings if unknown)

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Fabricated Corner or Bay Lintels

Lintel features Support Posts

Indicated below are examples of the more popular Refer to page 52 for information and page 53
mitred lintels available from Catnic. Whatever your for specific dimensions and ordering details.
requirement our Technical Services Department will
be able to advise on the best possible solution.

Curved Lintel The illustrations shown here are for guidance only.
To ensure the lintel design meets the application,
the following information will be required:

Clear opening dimensions

Wall construction
Applied load or plans, sections and elevations
Plaster key requirements (internal and external)

NOTE: As part of Catnics BS EN ISO 9001:2000, manufacture of fabricated corner

or bay lintels will not commence without a signed (approved) copy of our drawing(s)
returned to our Technical Services Department.

Corner Lintel CU Bay Window Lintel CU

Splayed Bay Lintel CU

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Enquiry Form - Fabricated Arch Lintels

Please complete all relevant details and submit to Technical Services on Fax: 029 2086 0135
If you require further information please Tel: 029 2033 7900
Date:
Name:

Customer (full address): Site (full address):

Post Code: Post Code:

Tel No: Tel No:

Fax No: Fax No:

E-mail: E-mail:

Select required Lintel shape (please tick)

Curved on Plan Curved on Plan
semi-circle with semi-circle with
right angle straight bearing
bearing
H R H

E
E A E
A

Curved on Plan Curved on Plan lintel

quadrant with
straight bearings
E
H
R A

R
E

Note: If submitting this enquiry form, please do not allow for end bearings. This will be calculated by Catnic Technical Services.

Details required for manufacture (enter relevant information)

Dimensions Wall Construction Application Details
Clear Span A mm Masonry (Height) mm
Height of rise H mm Outer Leaf mm Roof Span (if applicabe) mm
Straight leg E mm Cavity Width mm Timber floor Span mm
Radius R (if applicabe) mm Inner Leaf mm or
Concrete floor Span mm

Load per metre (kN) Inner leaf Outer leaf (Please provide full working drawings if unknown)

Support Posts required? Yes No

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Corner Lintels

Special lintels are available for mitre and

welded corner and bay windows

Notes:

Lintel depth 220mm

Maximum lintel length available 3900mm

A separate DPC is required over the entire length

of the lintel

Lintel Safe Working Load is = 26kN per leg length

Minimum of one block course to the inner leaf,

built flush with the back element of the lintel

Support posts

Notes:

Post galvanised finish

A DPC is required over the base plate

Posts are available in standards lengths to allow for site

cutting to actual requirements

The front edge of the cap plate is to be covered by the

window frame

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Enquiry Form - Special Mitre & Welded Lintels

Please complete all relevant details and submit to Technical Services on Fax: 029 2086 A0135
If you require further information please Tel: 029 2033 7900
Date:
Name:

Customer (full address): Site (full address):

Post Code: E-mail:

Tel No: Fax:

Select required lintel shape - Standard lintels available for mitre, welded corner & bay windows
Lintel Wall construction SWL* Select Lintel Wall construction SWL* Select
Outer Cavity Inner Outer Cavity Inner
CG50/100 102 65 100-115 26 (kN) CG70/125 102 70-85 125-140* 26 (kN)
CG50/125 102 65 125-140* 26 (kN) CG90/100 102 90-105 100-115 26 (kN)
CG70/100 102 70-85 100-115 26 (kN) CG90/125 102 90-105 125-140* 26 (kN)
*Safe working loads are maximum per leg length for load ratios of 1:1 / 3:1

Corner Lintel Bay Lintel (square) Bay Lintel (splayed)

C
Angle
Angle
Angle
A A A
A A

B B B

Note: If submitting this enquiry form, please do not allow for end bearings. This will be calculated by Catnic Technical Services.

Details required for manufacture

Dimensions: Dimension A mm Dimension B mm Dimension C mm Angle

Are support post/s required Yes No

Support Posts - select length required Standard base plated provided

A

CG70/100 CG90/100
Please select Post length required A
CG70/125 CG90/125
1000mm* 2500mm*
1500mm* 3000mm*
2000mm* *Cut to length on site Typical details showing 8mm thick base plates bolted to substructure using 12mm diameter fixing bolts

For Catnic to check suitability of Lintel application, please include the following.
Plans/Dimensions Elevations Sections Suspended floor layout Roof layout

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Accessories
A range of accessories including ArchCentres,
Stop Ends, Cavity Weep Vents and Soffit Cladding
to complement your specific lintel requirements.

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Lintel ArchCentres Type AC

For the construction of segmental arches Material

in brickwork. Vacuum formed from gloss white ASA (Acrylic Styrene
A vacuum formed arch unit for use over openings in Acrylontride). The underside of the ArchCentre has self-
external cavity walls traditional and timber frame adhesive pads fitted to a base plate for ease of installation
providing permanent centering for brick arch construction. and incorporates a minimum of 2 built-in weep vents. For
longer length spans additional weep vents are included, at
Made under licence British Patent No. 2063953. maximum spacings of 900mm.

Allows easy construction of segmental arches Important note

Includes integral weep vent If used with Catnic soffit cladding, the straight ends of the
ArchCentre (see cross-hatching on illustration, left), which
extend beyond the structural opening, should be removed
before proceeding to stage vi. (see below) This operation
can also be carried out to avoid exposing the drip edge of
the ArchCentre within the mortar joint at the bearing end.
Cutting into the main body of the ArchCentre should not be
carried out.
ArchCentre Length

ArchCentre Span

ArchCentre Span 37.5mm

37.5mm
ArchCentre Length

ACA - 75mm
Lintel ArchCentre ACB - 150mm

Installation notes
i) Do not use damaged ArchCentres, refer to ArchCentre
ArchCentre ArchCentre Structural Installation Leaflet.
Code Span (mm) Opening (mm) Rise (mm)
ii) Remove the ArchCentre from its protective wrapping.
ACA0475 475 450-500 75
ACA0625 625 600-650 75
iii) Check that the ArchCentre is correct for application
ACA0925 925 900-950 75 (Refer to the code identification on the underside of
ACA1050 1050 1025-1075 75 the arch unit, and to the lintel specification).
ACA1225 1225 1200-1250 75
iv) Ensure the ArchCentre and lintel mounting surfaces are
ACA1350 1350 1325-1375 75
ACA1485 1485 1460-1510 75 clean and dry.
ACA1625 1625 1600-1650 75 v) Locate the unit centrally over the opening to determine
ACA1700 1700 1675-1725 75 the position on the lintel. The front drip section should
ACA1785 1785 1760-1810 75
be trimmed off at the bearing end to allow for thin
ACB1975* 1975 1950-2000 150
ACB2125* 2125 2100-2150 150 mortar joints and to enhance the appearance.
ACA2250* 2250 2225-2275 75 vi) Ensure the lintel is adequately bedded-in at supports,
ACB2325* 2325 2300-2350 150
and is parallel to the wall face.
ACB2425* 2425 2400-2450 150
vii) Remove the backing from the self-adhesive tape and
locate the unit against the toe of the lintel at a position
Note
previously determined, and rotate onto the lintel.
* Incorporate a solid base plate
Special ArchCentres available - for details please call our Technical viii) Apply downward pressure to ensure full contact of the
Services Department on 029 2033 7900 self-adhesive tape.

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Lintel Stop Ends Type CL3 and C90

For eliminating problems associated with Material

moisture penetration. Durrpolyethylene 6/A for type CL3.
Wind-driven rain that penetrates the external skin of a BS polypropylene for type C90.
cavity wall will, under normal conditions, discharge off
the ends of conventional lintels. However, with full fill Installation notes
cavity insulation, and in areas of severe exposure, large i) Ensure the lintel surface is clean and dry.
volumes of water can be released from lintel ends into
ii) Remove the protective covering to the length of the
and through insulation, creating dampness at internal
anchoring strip on the bottom of the Stop Ends.
reveals. Catnic Stop Ends prevent this problem.

iii) Position to suit the perpendicular joint nearest the

Use CL3 Stop Ends (see Figure 1) for lintels with a fully
lintel ends, ensuring that the base and back of the
inclined face within the cavity (combined lintels or
Stop End fit snugly into the front upstand of the
CL & CU lintels).
lintel face.
Use C90 Stop Ends (see Figure 2) for all lintels with a
Important note
90 brickwork/blockwork support flange (for use with
Cavity weep holes should be provided over all lintels
Cougar CG or CGH lintels).
fitted with Stop Ends. Stop Ends type CL3 can be
Technical requirements applied to lintels designed for cavity wall construction
NHBC Standards: Where fair faced masonry is with a maximum 100mm cavity, although they will
supported by lintels: cavity trays or combined lintels suit cavities up to 150mm wide, providing
should have Stop Ends. the lintel upstand rises to 225mm.

Zurich Municipal: To prevent water running into the

adjacent cavity, cavity trays should have 75mm deep
Stop Ends located to coincide with the perpend nearest
to the end of the cavity tray.

Figure 2:
Lintel Stop End type C90 for use with CG or CGH lintels and
external solid lintels

Figure 1:
Lintel Stop End type CL3 for use with combined lintels
or CL & CU lintels

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Cavity Weep Vents Type WV

For ensuring removal of water from cavities. Material

DPC and cavity tray installations over openings require BS Polypropylene in grey, beige and terracotta to match mortar.
weeps to discharge collected water from the cavity
Important note
above. Cavity Weep Vents also assist in draining
Cavity weep holes should be provided over all lintels fitted
interstitial condensation, which can contribute to
with stop ends.
moisture tracking across the cavity. The design of Cavity
Weep Vents type WV also provides an aesthetically Installation notes
pleasing solution, as the front face of the Weep Vent i) Position in the perpendicular brick directly above
blends unobtrusively into the masonry. the lintel.
ii) Use a minimum of 2 per lintel at 450mm
Technical requirements
maximum centres.
NHBC Standards 1995: Where fair faced masonry is
supported by lintels: weep holes should be provided
at maximum 450mm intervals. Each opening should
have at least two weep holes.

Zurich Municipal: In localities of moderate

exposure or worse, or where full cavity fill is
used, cavity trays should be adequately
drained through weep holes spaced at
no more than 1 metre apart, with at
least 2 per opening.

Cavity Weep Vent type

WV available in terracotta, beige
and grey

Lintel Soffit Cladding Type RC and FC

For improved appearance
An optional cladding, particularly suitable for use with
PVC-U windows. The cladding was originally designed to Lintel Soffit Cladding
type RC & FC, come in
give a more aesthetically pleasing appearance to rebated 96mm/108mm widths
combined box lintels. These advantages have now been respectively
extended to cover all flush soffit lintels.
Lintel Soffit
Cladding type RC
For improved protection
Lintel Soffit Cladding also provides extra protection,
especially in coastal regions, and in situations where
much of the lintel soffit is exposed.
Lintel Soffit
Material Cladding type FC

A PVC-U pre-cut unit, supplied in white (FC & RC) or

Lintel Soffit
brown (FC only). Cladding type FC

Important note
All external wall lintels fitted with lintel cladding must be
installed with a flexible damp proof course (DPC) ensuring
that the DPC projects beyond the front face of the cladding.
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Where to Use a Separate DPC

To satisfy NHBC and Zurich

Municipal technical requirements, Domoch Lerwick

Catnic lintels only require a

Inverness
separate DPC in severe exposure
zones i.e. zones 3 & 4 of the map Aberdeen

and as determined by BS 8104.

Perth
Dundee

Stirling
Glasgow Dunbar
Exposure Approximate wind Edinburgh
zones driven rain
(litres/m2 per spell) Ayr

1 (sheltered) Less than 33 Londonderry Stranraer

Carlisle Newcastle

2 (moderate) 33 to less than 56.5 Belfast Workington Alston

Enniskillen Middlesborough
Dungannon
Darlington Whitby
3 (severe) 56.5 to less than 100
Ripon
4 (very severe) 100 or more York
Hebben Bridge Hull
Skelmersdale
Doncaster Grimsby
Colwyn Bay Manchester
Sheffield
Bangor Chester Macclesfield Lincoln Skegness
Bala Nottingham
Stafford
Shrewsbury Leicester
Norwich
NHBC Amendments Oct 1992 Llanidloes Peterborough
Birmingham
require a separate damp proof Llandrindod Wells
Northampton Cambridge
Hay-on-Wye
Brecon
protection for all lintels in Scotland, Colchester
Gloucester Luton
Swansea
Northen Ireland, the Isle of Man Swindon
Welwyn Garden City

and in areas of severe or very Bristol Newbury London

Cardiff Staines
Weston-super-Mare
severe exposure to driving rain, Barnstaple
Watchet Aldershot
Dover
Taunton Gatwick
as defined under BS 5628 Part 3. Southampton
Exeter Sidmouth Poole Brighton
The map indicates typical Eastbourne

exposure categories.

In such cases, a cavity tray/damp

proof protection should provide an lintels not only provide additional site applications where the soffit of
impervious barrier draining water protection against the elements but the lintel is exposed, the use of a
outwards. It should have an overall also act as a support and template soffit cladding in conjunction with
minimum upstand of 140mm, for the DPC, making it easier a separate DPC is highly
returned to the inner leaf masonry, to install, and with less risk of recommended to improve
and be so shaped that there damage. The DPC should project at appearance and extend normal
is not less than 100mm vertical least 25mm beyond the outer face maintenance periods.
protection above a point where of the cavity closer and vertical
mortar could collect. DPC. It should provide drip
Reproduced from BRE report Thermal
protection for the door and window Insulation: avoiding risks by permission of
Where exposure conditions or local heads, and cover the ends of the the Controller of HMSO: Crown Copyright.
building regulations demand a Report available from CRC Ltd
lintel to ensure moisture is shed
on 020 7505 6622
separate DPC, Catnic cavity wall clear of the reveals. For all coastal

58 Lintel Product Selector

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Quality Assurance

Catnics excellence in quality BBA Certification Management System Registration

standards is internationally The BBAs Agrment certificates In todays increasingly competitive
recognised. have been providing authoritative environment customers are
and independent information on the becoming more sophisticated and
British and European Standards performance of building products for better informed. Expectations are
Catnics standard range lintels are over 35 years. Every Agrment growing and businesses need to
designed and made to very high certificate contains important data demonstrate commitment to quality.
quality standards. on durability; installation and As an accredited organisation, we
The products are: compliance with Building are committed to making
Regulations across the UK. continuous performance
Manufactured from pre-galvanised improvements in key areas, such as
steel in accordance with BS EN Assessment involves three distinct business efficiency and risk
10327:2004 of grade DX51D with areas 1) laboratory testing, 2) site management, reviewing procedures
or without polyester coated finish. inspections, undertaken by the and levels of service.
BBAs own inspection Services team
Lintels conform to the material and 3) factory production control. Catnic is a BSI registered firm with
specifications laid down in BS quality management system in
5977: Part 2:1983 and BS EN accordance with BS EN ISO
845-2:2003 9001:2000 which provides a set of
processes that ensure:
Catnic was the first lintel Certificate No. 91/2638

manufacturer to be awarded For copies of Catnics BBA Certificates Clarification and documentation
a BSI Kitemark licence and please visit www.Catnic.com or call of policies and objectives
BBA certificate. us on 029 2033 7900
Relating to customers
BSI Kitemark requirements to production with a
Technical Conformity
The Kitemark is a BSI certification view to achieving customer
Catnic comply with the technical
mark, licensed for use on a product satisfaction
requirement of:
after independent testing has been
National House-Building Council
carried out to establish conformity Understanding how statutory and
(NHBC): NHBC is the independent
with the stated standard, and regulatory requirements impact
regulatory board and the worlds
satisfactory assessment of the on Catnic and our customers
leading warranty and insurance
manufacturing control process has
provider for new homes in the UK.
taken place to establish that such Clear responsibilities and
conformity may consistently be authorities increasing motivation
Housing Association Property
achieved. BSI verifies continuing and commitment
Mutual (HAPM): with appropriate
product conformity by periodic adjustment factors lintels are rated
Reduce waste
product testing and assessment of by HAPM as satisfying the 35 years
the manufacturing control process. to first maintenance durability Consistency and traceability of
rating, laid down in the HAPM products and services
BRITISH
TO S
Component Life Manual.
CERTIFIED

TA
NDARD

High level of internal and external

BS 5977
LICENCE No. KM07234
Local Authority Building Control communications
(LABC): is dedicated to maintaining
the highest standard in building
design and construction. LABC is a
EN ISO 9001: 2000
Certificate No. FM14913
publicly accountable, independent
building control provider.
Lintel Product Selector 59
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Technical Information

Research and Development The CL & CU lintel range refers to Also, because Catnic cavity wall
The Research, Development and uniformly distributed loads in the lintels are shaped to form a built-
Technology business of Corus ratio of 19:1 when non standard or in damp proof course, partial fill
combines top class innovation and unusual loading conditions occur. cavity wall insulation can extend
cutting edge technology to deliver down to the top of the lintel. This
metals solutions in a constantly A lintel should not exceed a means that the cold voids normally
changing world. maximum vertical deflection of associated with separate damp
0.003 x the effective span (effective proof courses are avoided, without
We use up to the minute technology span = distance between centre of the need to install specially shaped
to expand and improve the quality bearings) when subjected to the insulation batts behind the DPC.
of our performance; we continually safe working load (SWL).
invest in and upgrade our To achieve the thermal benefits of
manufacturing processes and use * The brochure SWLs are based on a Cougar open back or Classic
the latest methods in process the lesser value derived from a combined box lintel in accordance
analysis and design. serviceability deflection limitation of with the robust details as referred
in the approved documents: Part L1
Structural performance [ effective span
325
] or
[ ultimate failure
1.6 (min)
] and Part L2, the window frame
The structural data published in the should be positioned so that the
loading tables included in this Fire tests back face of the frame overlaps the
technical guide, was achieved in Catnic lintels have been inner face of the outer leaf of the
accordance with the requirements independently tested in accordance cavity wall by a minimum of 30mm.
of BS 5977: Part 2:1983 and BS EN with the relevant parts of BS476,
845-2.2003. Extensive testing was Methods of Determination of the The standard range of cavity wall
undertaken at the following test Fire Resistance of Loadbearing lintels incorporating perforated
houses: Elements of Construction. Details base plates have been designed to
of the test results can be found minimise any potential cold bridge
The University of Wales, School in TRADA (Timber Research and path without compromising its
of Engineering Development Association) Nos. structural integrity. The unique
The University of Glamorgan, FR254, 275, 659, 863, 1662 and slotted base plate design on the
Construction Centre RF94015 and FROSI (Fire Research underside of the lintels provides an
Ceram Building Technology, Organisation) No. 5001. effective conductivity not exceeding
Stoke-on-Trent 30W/mK which satisfies the
Thermal performance requirements of the approved
Safe working loads (SWL)*, as All Catnic cavity wall lintels document to support Part L1 & L2
defined by BS 5977: Part 2:1983 for contribute to the thermal integrity of 2002 edition.
cavity wall lintels refer to uniform the building as they are supplied
distributed loads applied in the with an insulated core. The core of
inner to outer leaf ratios: the Cougar Open Back style lintels
is fully filled with CFC & HCFC free
1:1 For lintels supporting
insulation to prevent cold voids.
masonry only
3:1 For lintels normally carrying
timber floors
5:1 For lintels normally carrying
concrete floors

60 Lintel Product Selector

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The Environment

We consider care for the advises on the economic, All products should be used in
environment to be essential both environmental and social accordance with their specific
in terms of our duty to society performance of its products in instructions to prevent failure.
and to ensure the continuity of buildings and structures, in order to
our business. improve sustainability awareness Handling storage and disposal
throughout the supply chain. Gloves should be worn to avoid
Environmental Policy injury from any sharp edges.
Catnic are committed to protecting Corus encourage, promote and
the environment by minimising the assist in the return of steel for When lifting or carrying,
impact of our operations and our recycling and also actively consideration must be given to
products through the adoption of encourage customers to use the size and weight of the
sustainable practices and through products sustainably. As a result, product.
continuous improvement in the metals used in construction are
environmental performance and now often recycled, as are the Processes such as welding,
control. We believe that respect for metals used in other sectors, such burning, cutting or grinding can
the environment is critical to the as automotive and packaging. result in vaporising the metal or
success of our business and our generating airborne particles that
aim, therefore, is to continuously Health & Safety Policy may present additional hazards.
improve our performance. Catnic actively work towards Corus
own international safety rating Unless required for immediate
Sustainability system and have one of the highest use on site, all products should
Corus places great emphasis on the scores amongst all Corus be stored in a clean and dry
contribution we make to a manufacturing sites in the UK. environment on firm and level
sustainable society and is ground.
committed to incorporating the We believe that all our activities
principles of sustainable can be undertaken safely and we Do not use damaged goods.
development into all aspects of will never compromise safety.
our operations. When disposing of any Catnic
We will conduct our business in a products or packaging, due
Steel is one of the worlds most way that ensures the health and consideration must be given to
recycled materials with, for well being of our employees, the environmental impact of the
example, around 40% of the worlds contractors and any person method of disposal.
production of new steel made from affected by our activities.
recycled steel. Steel products play
Control of Substances
a role in everything we do in We know that continuous Hazardous to Health
modern day life and much of the improvement of our health and Regulations 1994 (COSHH)
steel in use today will therefore be safety performance is essential for
All products are considered non-
reused and recycled in the same a succesful company.
hazardous to health under normal
and different applications in
conditions of use.
the future. Everyone in Corus has
responsibility for their own and
Corus provides advice to designers
others' health and safety.
to help minimise the use of scarce
natural resources while maximising
We will encourage a health and
the potential of low energy,
safety culture in Corus.
recyclable products. For example,
in the construction sector, Corus

Lintel Product Selector 61

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Technical Specification & Glossary

Cougar Open Back Styles Classic Combined Box/External Safe working load (SWL)
CG and CGH ranges Solid Wall/ Internal and Timber The total uniformly distributed load
The lintels are manufactured from Frame Styles (UDL) that the lintel is designed to
galvanised steel to BS EN10327: 2004 support, whilst providing an
CN and CTF range
(continuously hot-dip coated strip and appropriate safety factor.
The lintels are manufactured from
sheet of low carbon steels and cold galvanised steel to BS EN 10327: Triangulated masonry load
forming - technical delivery conditions) 2004 (continuously hot-dip coated A load assessed in accordance with
of grade DX51D & Z275, but with a strip and sheet of low carbon steels the guidelines of BS 5977 Part 1:1981
minimum yield stress of 250N/mm2. and cold forming - technical delivery and AMD 4796:1985
The lintels are further protected against conditions) of grade DX51D & Z275
corrosion by a black coloured polyester but with a minimum yield stress of Uniformly Distributed Load (UDL)
resin coating applied to all external 250N/mm2. The lintels (excluding A load that is uniformly spread along
surfaces. The lintels are fully insulated internal lintels CN92 and CN102) are the entire length of the lintel.
with expanded polystyrene bead of further protected against corrosion by
density 18kg/m3 giving a thermal Point load
a polyester resin coating applied to all
conductivity of between 0.031W/mK The load applied from a single
external surfaces of the lintel. The
and 0.036W/mK. member such as a steel beam or
lintels are insulated (where applicable)
girder truss. It should be spread over
CL & CU range with expanded polystyrene board to
an appropriate area so that the
The lintels are manufactured from BS 3837 Part 1: 2004 (expanded
limiting design values are not
galvanised steel to BS EN10327: 2004 polystyrene boards specification
exceeded.
of grade DX51D & Z275 with a for boards manufactured from
minimum yield stress of 250N/mm2. expandable beads). Moment of inertia (Ixx)
The lintels are further protected CNZ range Represents the moment of inertia or
against corrosion by a black coloured The lintels are manufactured from second moment of area of the lintel
polyester resin coating applied to all galvanised steel to BS EN 10327: section about a horizontal axis
external surfaces of the lintels. 2004 (continuously hot-dip coated through the lintel centroid indicating
strip and sheet of low carbon steels the stiffness of a lintel under a given
The lintels are fully insulated with
and cold forming - technical delivery load and indicative of the lintel shape.
expanded polystyrene board
conditions) of grade DX51D & Z275 The greater the Ixx level, the stiffer the
manufactured in accordance with
but with a minimum yield stress of lintel will be and hence the less a lintel
BS 3837: Part 1: 2004 (Expanded
250N/mm2. The lintels are further will deflect.
polystyrene boards specification for
boards manufactured from protected against corrosion by a
Deflection ( )
expandable beads). The material is polyester resin coating applied to all
Vertical/horizontal displacement of the
CFC & HCFC free and has an ozone external surfaces of the lintel.
lintel due to bending about the
depletion potential (ODP) of zero. Feature Lintels vertical/horizontal axis.
The CU range can also be supplied CCA and CCB range Modulus of elasticity (Zxx min)
with a hot dip galvanised finish after The lintels are manufactured from The section Modulus of the lintel
manufacture to BS EN ISO1461: 3.0mm structural grade steel plate of about a horizontal axis, when
1999. At ordering stage ensure that a grade S275 to BS EN10025-2:2004 multiplied by the permissible working
suffix PG is included within the lintel and hot-dip galvanised after stress, the resultant value is the
code reference, ie. CU50/100PG. manufacture to BS EN ISO1461:1999. serviceability moment.
To satisfy the corrosion protection Glossary
system of BS 5977: Part 2 and NHBC Serviceability reaction
Lintel The permissible load at an end
technical requirements, lintels
A structural member spanning an support within the working load
galvanised to BSEN ISO1461: 1999
opening in a wall. capacity of the lintel webs.
must be installed with a separate
damp proof course. Clear span or Clear opening
End bearing
The clear distance between
The bearing length at lintel supports.
lintel supports.
62 Lintel Product Selector
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Technical Enquiry Request Form

Catnic aim to return enquiries within approximately 15 working days. If your enquiry is more urgent than August 2006
this, please call Technical Services on 029 2033 7900 who will endeavour to meet your needs.
Please ensure that essential information (indicated in red) is provided, to enable a quick turnaround.
Please return on Fax: 029 2086 0135. Additional copies of this form can be ordered on the above telephone number.

From: Date:

Customer (full address): Site (full address):

Post Code: Post Code:

Tel No: Tel No:

Fax No: Fax No:

E-mail: E-mail:

Lintel Requirements Wall Construction

(please tick if required) (please fill in dimensions)

Special OUTER CAVITY INNER

Type Width Between Masonry Type Width

Internals (mm) inc. insulation (mm)
Meter Boxes Brick Brick
Stone Dense block
Replace Steelwork
Dense block Lightweight block
Lightweight block Medium block
Medium block Timber frame
Steel frame

Is a separate damp proof course to be installed? Yes No

Please indicate whether outer leaf support is required at eaves level Yes No
Special Requirements (eg. send to Site/Merchant etc.)

Please include the following (please tick)

Plans/dimensions Elevations (all) Sections (all) Site plan (for summary)

EITHER Suspended floor carcass timber OR Suspended concrete floor span directions

Roof carcass (for girder trusses) Structural engineers steelwork arrangements Attic truss carcassing

Please indicate any fairfaced internal areas on drawings

NOTE: IT IS IMPORTANT FOR A QUICK TURNAROUND THAT ALL BOXES ARE COMPLETED CORRECTLY BY REFERRING TO THE
DRAWINGS BEFORE SENDING TO OUR TECHNICAL SERVICES DEPARTMENT
Lintel Product Selector 63
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Notes

64 Lintel Product Selector

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Catnic - much more than just Lintels...

Catnics innovative approach to building products has resulted in

a real alternative to traditional roof tiles. The Litetile range is
designed to provide an attractive, modern tiled finish for all types
of pitched roofs.
Catnic Litetile

Catnic develop, manufacture and supply a comprehensive range of

precision made, high quality steel building products. From Plasterers
Beads to Wall Ties all our products benefit from our long experience
of using steel in construction.
Building Components

The patented brick spacer system presents a totally new concept

in brick laying tools. Catnic Brikmat provides uniform mortar joints
on a wide range of building materials including bricks, blocks,
decorative stone and cast concrete products.
Catnic Brikmat

A comprehensive range of fence support systems and accessories

all manufactured from high quality, long lasting materials.
Qwikpost is the quick and easy way to erect or repair a fence.
Catnic Qwikpost

For more information about any of these products,

please call Catnic on 029 2033 7900 for a brochure

Lintel Product Selector 65

9616 Catnic Lintel Brochure 2/8/06 12:54 Page 66

www.catnic.com

Catnic is a Corus Group company.

Further information can be found on the
Corus website at www.corusgroup.com

Care has been taken to ensure that this

information is accurate, but Corus Group plc,
including its subsidiaries, does not accept
responsibility or liability for errors or
information which is found to be misleading.

Copyright 2004
Corus

Catnic
Pontypandy Industrial Estate
Caerphilly
CF83 3GL
Telephone 029 2033 7900
Facsimile 029 2086 7796 C03:30000:UK:08/2006

PDA8753/05