PERMALITE®

ALUMINIUM
Roofing Solutions

The durable solution to the toughest conditions

PERMALITE® Design Manual 2012 1

2 PERMALITE® Design Manual 2012
Contents
PERMALITE® Cladding Product information Page Page
Introduction 4 3.0 Installation 22
Eco friendly & recyclable 4 3.1 Safety 22
1.0 Materials 5 3.2 Preparation 22
1.1 Testing standards 5 3.3 Squareness 22
1.2 Wind forces on roofs 5 3.4 Purlin isolation 22
1.3 Materials and finishes 6 3.5 Sheet installation 22
1.4 Alloy mechanical properties 6 3.6 Sealants 22
1.5 Thermal expansion 6 3.7 Sheet cutting 22
1.6 Thermal protection 6 3.8 Post painting 22
1.7 Quality Assurance 6 3.9 Translucent sheeting 22
1.8 Environmental conditions 6 3.10 Sealants 22
1.9 Storage and handling prior to use 6 3.11 Welded joints 22
1.10 Support spacings 7 3.12 Installation instructions 23
1.11 Roofing access 7 3.12.1 ordering sheets 23
1.12 Maximum lengths for roofing 7 3.1.3 Fastenings 23
1.13 Trafficable spans 7 3.14 Fixings 23
1.14 Walking on roofs 7 3.14.1 Crest fasteners 23
1.15 Timber and metal compatibility 8 3.14.2 Valley fasteners 23
2.0 Product data 9 3.14.3 Flashing and Side lap fastening 23
2.1 System profiles 9 3.15 Pierce-fixed roof fixing 24
2.1.1 Permalite® LT7 9 3.16 Types of pierced fixings 24
2.1.2 Permalite® Alspan 9 3.17 End laps 25
2.1.3 Permalite® V-Rib 9 3.18 Side laps 25
2.1.4 Permalite® Waveline 9 3.19 Fastener Specifications 26
2.2 Paint systems 9 4.0 Typical flashing details 28
2.2.1 Standard range 9 4.1 Flashing materials 28
2.2.2 Premium range 9 4.2 Roof flashing 28
2.2.3 Colour range 9 4.3 Barge flashing 28
2.3 Design information 10 4.4 Longitudinal flashings 28
2.3.1 Introduction to design data 10 4.4.1 Flashing cover 28
2.4 Permalite® LT7 10 4.5 Transvers flashings 29
2.5 Permalite® Alspan 12 4.5.1 Flashing cover 29
2.6 Permalite® V-Rib 14 4.5.2 Fixing of flashing 29
2.7 Permalite® Waveline 16 4.6 Flashing small roof penetrations 29
4.5 Flashing large roof penetrations 30
2.8 Aluminium purlins 18
5.0 Insulation 31
2.9 Circular roofs 18
5.1 Insulation materials 31
2.11 Convex curved roofing 19
Foil laminates 31
2.12 Spring curved roofs 19
Blankets and batts 31
2.13 Condensation 19
Polystyrene boards 31
2.14 Design of drainage 20
5.2 Insulation thickness (glass wool) 31
2.15 General rainwater system design
recommendation 20 5.3 Heat control methods 31
2.15.1 Box gutters 21 6.0 Accessories 32
2.16 Turn-up roof cladding 21 7.0 Independent Engineering Certification 33
2.17 Roof slopes 21

PERMALITE® Design Manual 2012 3

Introduction Eco-friendly & recyclable
Aluminium is a long lasting, durable, lightweight alternative to Choosing the optimum material for your next project should
other cladding materials. take account of the full lifetime of the material. This will include
construction, use, maintenance and disposal. Materials which
Aluminium provides high thermal insulation and minimal
can be recycled easily and economically and which do not
maintenance to remain corrosion-free.
require landfill disposal should be preferred.
It is easier to transport and erect because it is significantly
Aluminium’s formability, high strength-to-weight ratio, corrosion
lighter than many alternate cladding materials.
resistance, and ease of recycling makes it the ideal material
This book is a guide to the installation of aluminium roofing for a wide range of building applications. It is almost uniquely
and walling manufactured by Permalite. We intend that it be suited for projects in harsh industrial and marine environments.
used by all trades and professions involved with specifying and
applying the range of our products. Reference to this manual
will allow you to maximise the benefits of aluminium in your
next project.

We refer only to genuine Permalite® aluminium roofing and

walling manufactured by us and marketed under our brand
names. Our recommendations should only be used for our
products because they are based on comprehensive testing
of our profiles, base-metal-thicknesses (BMT) and material
finishes.

Our products are engineered to perform according to our

specifications only if they are used in the appropriate
conditions and installed to the recommendations in this manual
and our other publications.

Where we recommend use of third party materials, ensure you

check the qualities and capabilities of those products with the
relevant manufacturer before use.

Walls
When you design Permalite® aluminium cladding into your
building you have a range of profiles from which to choose.
Whilst cladding obviously needs to keep out the weather, it
also has significant effects on the looks, cost and durability of
a building.

Roofs
There are many factors in designing roofs including:
• the shape: is the roof to be ‘flat’ or pitched
or curved?

• the supporting structure and support spacing;

Benefits
• the wind forces that the roof must sustain;
Durability:
• the pitch which affects the looks, the profile’s ability to The outstanding benefit of Permalite® Aluminium Roofing
efficiently carry rain to the gutters, and fixing details; Products is their long-term durability in aggressive
environments. Permalite® roofs have been installed in
• thermal expansion of long sheets (Section 1.5);
Australia since the 1960s. This proven track record in
• the attributes of other materials used in the roof design. Australia’s harshest conditions means you can be assured of an
effective roof life significantly longer than for most other roofing
This book doesn’t attempt to cover the structural design details materials.
of supports or aesthetics: there are many other texts and
Thermal efficiency:
Australian Standards that cover these areas.
Unpainted aluminium can reduce heat transmission by up
This Manual provides tables of load capacities, and the to 9.5ºC due to its high thermal insulation properties. This is
maximum roof length for pitch and rainfall intensity for significant in reducing the ever-increasing operating cost of air
Permalite® aluminium roofing products. conditioning.
The appropriate design will depend on your particular needs Weight:
and circumstances. You should get advice from the relevant
The lighter mass of aluminium may provide a reduction of the
specialists where required.
cost of transport to remote locations.

4 PERMALITE® Design Manual 2012

1.0 Materials 1.2 Wind forces on roofs
1.1 Testing Standards Winds create considerable forces on both the topside and the
AS 1562.1:1992 specifies the design and installation of sheet underside of roof cladding, and you must consider these forces in
metal roof and wall cladding. Our Permalite® profiles satisfy the design and fixing of any roof. The forces are:
all the requirements of this Standard, including the ability of
the roof to withstand concentrated loads according to • inward forces tending to collapse the roof cladding inwards,
AS 4040.1 and wind pressure in non-cyclonic regions caused by wind acting directly on the windward side; and
according to AS 4040.2.
• outward forces tending to lift the roof cladding from its
framing, and the entire roof structure from the rest of the
building. Outward forces can be caused both by uplift from
negative wind pressures, outside the building; and by positive
wind pressure inside the building.

Generally the greatest wind forces imposed on roofs are due to

Note on testing for cyclonic areas the outward forces. Because the dead weight of roofing materials
The Building Code of Australia (BCA) currently requires is relatively small, the outward forces must be resisted by the roof
all metal roof claddings, its connections and immediate fasteners.
supporting members to withstand a low-high-low (LHL)
pressure sequence. Permalite® aluminium claddings are It is very important that the battens and roof framing are
subjected to cyclonic conditions, according to the BCA adequately fixed to the rafters and walls, and that under extreme
definition, and as such, must be tested using the LHL cyclonic conditions the wall framing is anchored to the footings. Special
testing methodology to determine their capacity. anchoring provisions may apply in cyclonic areas. Specialist
Jame’s Cook University ‘s Cyclone Testing Station has advice should be sought in these circumstances.
performed comprehensive simulated wind loading pressure
tests of the entire range of Permalite® aluminium claddings
fastened to 1.9mm BMT G450 steel purlins for the most
accurate results. These tests were conducted on a direct
air pressure rig in the University‘s Cyclone Testing Station
laboratory.

L-H-L Loading regime from BCA

Pt High

Low Low

5000 cycles 10000 cycles

4500 cycles - 0.45Pt
600 cycles - 0.6Pt
80 cycles - 0.8Pt
1 cycle - Pt

Figure 1.1 The sequence L-H-L loading regime is shown in the

graph above where Pt is the ultimate limit state test pressure.

PERMALITE® Design Manual 2012 5

1.3 Materials and finishes 1.6 Thermal protection
All Permalite® aluminium roofing profiles and flashings are The low emissivity of unpainted aluminium roofing greatly
produced from marine grade aluminium alloy entirely. No reduces heat gain in a building where an air space is
coatings or claddings are required to enhance performance or provided on the underside of the roof. The factors of
economy; you don’t have to consider coating thicknesses. reflectivity and absorptivity of unpainted aluminium are also
favourable, particularly when the underside of the roof is
The quality of the paint systems used on Permalite® aluminium
insulated.
roofing products (Refer to page 19) is an additional bonus to the
durability of the sheet itself. On painted roofs, the use of light colours will help to reduce
the thermal absorptivity of the paint coating.
LT7, Alspan, Waveline and V-Rib are manufactured entirely from
aluminium alloy 5251 or 5052 produced by Permalite® to AS/
Table 1.1
NZS 1734:1997 Thermal factors
Alloy 5251/5052 are high strength marine grade alloys with Unpainted Galvanised Steel
exceptional resistance to corrosion in marine or industrial (Weathered) (New to Weathered)
environments. Reflectivity 0.74 0.34 to 0.11
Absorbivity 0.26 0.66 to 0.89
The profiles are available in three finishes:
Emissivity 0.11 0.28 to 0.42
Mill Finish – an unpainted smooth lustrous finish which will dull
relatively quickly and enhances corrosion resistance. The following thermal transmittance values (U) are applicable
to a weathered aluminium roof with no ceiling.
Stucco Finish – stucco embossed mill finish, which reduces the
Aluminium Roofing Sheet U Value (W/m3K)
specular reflectance of mill finish sheet.
Under Roof Insulation Summer Winter
Painted Finish – a range of quality painted finishes (Refer to 50mm wool and reflective foil 0.43 0.58
page 19) are available. 40mm space and 50mm wool
and reflective foil 0.36 0.51
1.4 Alloy Mechanical Properties
The following properties are typical of mill finish, unpainted 1.7 Quality Assurance
sheet. The in-line painting and rollforming of Permalite® aluminium
Alloy 5251 5052 roofing and walling products are conducted in Australia in
accordance with BlueScope Steel’s strict quality control
Temper H38 H38 guidelines. Permalite® holds Quality Certification to
Minimum Yield Strength, MPa 225 220 AS/NZS 9001:2008.
Ultimate Tensile Strength 260 270 1.8 Environmental conditions
Elongation 0.70 BMT 3% 3% Aluminium products are generally specified for severe
Elongation 0.90 BMT 4% 4% environmental conditions including industrial, agricultural,
Elongation 1.20 BMT 4% 4% marine, intensive animal farming, swimming pools or other
aggressive conditions.

Coefficient of Thermal Expansion 24 x 106 per ºC (Approx. To get the best performance from our products in these
1.2mm/m over 50ºC) conditions, or other unusually corrosive environments, seek
advice from our technical representatives.
1.5 Thermal expansion
1.9 Storage & handling prior to use
Although aluminium has twice the coefficient of expansion of
steel (24 x 103 compared to 12 x 10-6 ºC) the effect of this is often Aluminium roofing requires care during handling and
over estimated. installation. Installation damage can be avoided by taking
reasonable care and following the recommendations of this
Usually aluminium cladding is fixed to a steel structure, which,
manual.
under the same thermal influence, expands or contracts also.
Keep the product dry and clear of the ground. If stacked or
The combination of these factors results in a low relative
bundled product becomes wet, separate it, wipe it with a clean
expansion between the aluminium cladding and the steel
cloth and stack it to dry thoroughly.
structure. It has been observed in practice that the theoretical
expansion of an aluminium roof, relative to the steel structure Sheet that has become wet during transport is to be unpacked
on which it is fixed, is reduced by up to 50%. immediately and each sheet dried thoroughly on both sides
before restacking. Stored sheet is to be clear of the ground
NOTE: As an approximation, aluminium expands 1.2mm/m over
when under cover or, for outside storage, fully covered with
50° temperature change.
tarpaulins or plastic sheeting with the sheet and wraps clear
of the ground. Contact with moisture, cement dust, lime
or abrasive dust is to be avoided. Mill finish is particularly
susceptible to this type of water staining.
Packs of sheet stored on the roof must be placed over trusses
or purlin supports.

6 PERMALITE® Design Manual 2012

1.10 Support spacings situations such as high traffic service areas (that are not
subject to Wind Loads) where access is required and damage
The maximum recommended load capacities are shown in the may occur Table 1.2 applies. For high traffic areas that are
following pages. They are based on data in accordance with subject to normal wind loads, then a 25% reduction of the
AS 1562.1:1992 Design and installation of sheet roof and wall span determined from the published charts should be applied.
cladding: Metal, and AS 4040.1:1992 Methods of testing sheet Alternatively, 1.2mm sheets may be used in these areas. The
roof and wall cladding—Resistance to concentrated loads. spans used in service areas should always be the lesser of the
trafficable spans or the wind loading spans.
The spacings in the tables are recommended to produce
adequate performance of claddings under concentrated 1.14 Walking on roofs
loading (incidental for maintenance).
It is important that you walk on roofing carefully, to avoid
In all cases, cladding is fixed to a support of 1.9mm minimum damage to either the roofing or yourself. Generally, keep your
base metal thickness (BMT) and minimum yield stress of G550. weight evenly distributed over the soles of both feet to avoid
If you want to use metal battens thinner than 1.0mm, seek concentrating your weight on either heels or toes. Always wear
advice from our information line. smooth soft-soled shoes; avoid ribbed soles that pick up and
hold small stones, swarf and other objects.
1.11 Roofing Access
When you walk across the ribs, walk over or close to the
Areas of a roof that may incur damage are those around roofing supports. (Usually over fastener locations.) Be careful
facilities that require periodic servicing such as air conditioning when moving between supports. Do not walk in the pan
plant, hot water systems and gutters etc. immediately adjacent to flashings or translucent sheeting. Walk
The provision of closer purlin spacings in such areas, at least one pan away.
or footways of aluminium treadplate, will greatly reduce Temporary plank walkways should be provided while other
thoughtless future damage. trades walk on the roof.
1.12 Maximum lengths of roofing Always take particular care when walking on wet or newly laid
The valleys (or pans) of roofing have to carry water to the sheets — particularly on steeply pitched roofs.
gutters. If in heavy rain, the valleys overfill, water can flow into
the roof through the side-laps and flashings.

The valleys (or pans) of roofing have to carry water to the

Table 1.2 Trafficable spans - High Traffic Area,
gutters. If in heavy rain, the valleys overfill, water can flow into No Wind Loads
the roof through the side-laps and flashings.
Permalite® LT7 Intermediate Eaves/Ridge
Factors affecting waterproof and drainage capacity of the laps
of a profile include:
0.70mm 1.50m 1.20m
• the width and depth of the valleys or pans;
0.90mm 2.40m 1.80m
• the pitch of the roof—rain flows faster on a steeper
1.20mm 3.00m 2.10m
pitch; Permalite® Alspan
• rainfall intensity for the geographical area; 0.70mm 1.80m 1.50m
• the length of the roof from ridge to gutter; and 0.90mm 3.00m 2.70m
• penetrations that cause nearby valleys to carry extra Permalite® V-Rib
rain diverted from valleys obstructed by the penetration
The maximum recommended roof lengths for drainage for each
0.70mm Permalite® V-Rib is not suitable for high
profile are given in Section 2.14. 0.90mm traffic areas. Please seek specialist advice
1.20mm from our technical advisory service.
1.13 Trafficable spans
Permalite® Waveline
All of the load capacities shown in this manual include
0.90mm 1.5m 1.2m
allowances for incidental roof traffic as per AS 1582:1992 and as
such allow for design of trafficable roofs. However for unique

Note position of internal End span purlin.

Figure 1.2 Trafficable spans Equal Spans as per load/span graph.

PERMALITE® Design Manual 2012 7

1.15 Timber and metal compatibility
Under no circumstances should galvanised steel, ZINCALUME® See tables below for direct contact and rainwater discharge
steel, lead, copper, brass, or copper alloys be placed in contact compatibility issues.
with aluminium, nor should you permit water run off from these
materials to discharge onto aluminium sheets. Permalite Aluminium
roof sheeting
Care must be taken to avoid contact with building materials
such as unseasoned or chemically treated timber, lime cement,
concrete, mortar or plaster during construction and to provide
impermeable barriers against long term contact.
In most situations the face of a dissimilar metal or timber
support, against which the sheeting is fastened, is to be painted Steel purlin
with chromate based primers/bitumous paint or good quality
(and appropriate width) adhesive PVC tape.
Under severe marine and/or aggressive industrial environments
Denso tape or closed cell polyethylene tape should be used to
completely fill the sheet/structure interface to avoid moisture
retention by capillary action. Permalite® will provide advice in Heavy Duty
such situations. (min. 250 micron thickness)
If there are doubts about the compatibility of other products self adhesive PVC tape
being used, seek advice from our technical representative. (or equivalent)
Figure 1.3 Intermaterial preparation measures

Table 1.3 Compatibility of direct contact between metals or alloys

ROOF DRAINAGE SYSTEM ACCESSORIES OR FASTENER OR (UPPER SURFACE)
COMPONENTS & ANY GALVANISED COLORBOND® including COLORBOND® STAINLESS ALUMINIUM COPPER &
ZINCALUME ®
ZINC (1) LEAD
CLADDING MATERIAL STEEL ULTRA & METALLIC STAINLESS STEEL (3) ALLOYS COPPER ALLOYS
ALUMINIUM ALLOYS NO NO NO NO NO YES YES NO NO
ZINCALUME® YES YES YES YES NO NO YES NO NO
GALVANISED STEEL YES YES YES YES NO NO YES NO NO
ZINC YES YES YES YES NO NO YES NO NO
COLORBOND® STEEL (plus YES YES YES YES NO NO YES NO NO
ULTRA®& METALLIC®)
COLORBOND® STAINLESS NO NO NO NO YES YES NO NO NO
STAINLESS STEEL NO NO NO NO YES YES NO NO NO
COPPER & COPPER ALLOYS(1) NO NO NO NO NO NO NO YES NO
LEAD NO NO NO NO NO NO NO YES YES
(1) MONEL - COPPER/NICKEL ALLOY
(2) FOR FURTHER GUIDENCE REFER TO AS/NZS 3500.3:2003
(3) FIXINGS ONLY

Table 1.4 Acceptability of drainage from an upper surface to a lower metal surface
UPPER CLADDING OR ROOF DRAINAGE SYSTEM MATERIAL
LOWER ROOF DRAINAGE
GALVANISED COLORBOND® including COLORBOND® STAINLESS ALUMINIUM COPPER & GLAZED TILES,
SYSTEM MATERIAL ZINCALUME ®
ZINC LEAD GLASS & PLASTIC
STEEL ULTRA & METALLIC STAINLESS STEEL ALLOYS COPPER ALLOYS(1)
ALUMINIUM ALLOYS YES YES YES YES YES YES YES NO NO YES
ZINCALUME® YES YES YES YES YES YES YES NO NO YES
GALVANISED STEEL NO YES YES NO NO NO NO NO YES NO
ZINC NO YES YES NO NO NO NO NO YES NO
COLORBOND® STEEL (plus
YES YES YES YES YES YES YES NO NO YES
ULTRA®& METALLIC®)
COLORBOND® STAINLESS YES YES YES YES YES YES YES YES YES YES
STAINLESS STEEL YES YES YES YES YES YES YES YES YES YES
COPPER & COPPER ALLOYS(1) YES YES YES YES YES YES YES YES YES YES
LEAD YES YES YES YES YES YES YES YES YES YES
(1) MONEL - COPPER/NICKEL ALLOY
(2) FOR FURTHER GUIDENCE REFER TO AS/NZS 3500.3:2003

8 PERMALITE® Design Manual 2012

2.0 Product data
2.1 System profiles
Permalite® offers four different solutions to provide a range of
stylish, economical and durable systems suitable for almost
any cladding applications.

2.1.4 Permalite LT7®

The versatility of this profile is due to its strength, water
carrying capacity and fixing economy. The cover width is
875mm.
2.1.1Permalite V-Rib®
The symmetry and 915mm cover width of this product pro- It is widely used for roofing and can be reversed to provide a
vide exceptional economy through faster fixing and minimum bold wall effect.
wastage. These factors are important on smaller projects and
2.2 Paint systems
complex roof and walls or where a striking design is required.
Permalite® Roof and Wall Sheet may be supplied prepainted
on one or both sides.
Aluminium provides an excellent painting base for paint
systems. Before roll forming, the paint is applied to the coiled
sheet by reverse roller coating and heat curing on paint lines
employing the latest painting technology.
2.2.1 Polyesters
The new generation Polyester paints have outstanding colour
and gloss retention characterisitcs. This, coupled with their
resistance to scratching during transportation and installation;
make these paints suitable for the majority of severe marine
and industrial environments. Polyester paint systems have been
extensively tested in Australia’s tough environment over many
years. Colours available in store are:
2.1.2 Permalite Alspan®
This profile was designed specifically to provide a wide span- * Endurogreen® * Glacier White®
ning capability and a distinctive appearance. Cover width is
864mm.
The large robust ribs and exceptional water carrying capacity * Moonshadow® * Perpetual Green®
of this profile make it ideal for large high performance roofs
such as power stations and industrial or commercial buildings.
The profile is also used on walls where a strong visual effect is
required. * Sahara®
*B
 rochures colours are only
approximate - refer to painted
colour chip for actual colour.

2.2.2 Fluorocarbons
In certain applications and colours, fluorocarbon paints may
offer improved colour and gloss retention levels over polyester
paints. However fluorocarbon paints have a lower scratch
resistance and as such are more susceptable to damage during
transportation and installation. This needs to be considered
against the additional cost of these paint systems. Ask our
Permalite® technical team for advice regarding your project.
2.2.3 Colour Range
2.1.3 Permalite Waveline®
The traditional corrugated style and 762/990mm cover width of Most Standard COLORBOND® steel colours based on minimum
this product provides minimum wastage and quick installation. order quantities of 2.5 tonne. Other colours avalable on
Whether you want a traditional style or the modern look, the application with minimum order quantities and extented lead
universal appeal of Waveline is the right choice. times.
PERMALITE® Design Manual 2012 9
2.3 Design information 2.4 Permalite® LT7
2.3.1 Introduction to design data The versatility of this profile is due to its strength, water-
carrying capacity and fixing economy. It is widely used for
The following section is intended to provide the designer of the roofing and can be reversed for a bold wall effect.
building cladding with the data required to specify the most
cost effective use of the products and their efficient installation. Thickness Range: 0.70mm, 0.90mm, 1.2mm
The data applies to conventional structures in both cyclonic Length Range: 850mm to 23 metres
and non-cyclonic areas. Pan Cross Section Area: 26,000mm2
All design data is valid for the following conditions. Tolerances: Length +0mm, -15mm
Width +0mm, -3mm
• Minimum support member material is 1.9mm BMT G450 steel
Finishes: Mill, Stucco Embossed, Painted
• Overhang length does not exceed 100mm
• All spans are continuous (two or more spans) and equal
• Serviceability Limit State Design pressures are based on
deflection limit equal to (span/120+pan/30) according to
Section 5.5.1 of AS 1562.1:1992
If your requirement is outside these parameters you are invited
to call on the services of Permalite’s experienced technical
staff by contacting the Permalite® Sales Offices listed in this
publication.

19mm

57mm
38mm

127mm pitch

Cover width 875mm

Sheet width 933mm

Figure 2.1 Permalite® LT7 profile

Purlin and girt spacings

The wind loadings used in conjunction with these charts are
to be determined in accordance with AS/NZS 1170.2:2002
The values apply to the sheet being fastened with the
Permalite® Positive Fix System (refer to page 7).

Table 2.1 Profile properies Permalite® LT7

Thickness kg/m2 kg/m Section Modulus Moment of Inertia

(mm) Cover Width Length x 103mm3 x 103mm4
0.70 2.58 2.29 8.1 192
0.90 3.33 2.95 10.4 247
1.20 4.43 3.93 13.8 329

10 PERMALITE® Design Manual 2012

Table 2.2 Permalite LT7: Limit State wind pressure capacities (kPa)
Continuous Spans with all spans equal

Non Cyclonic based on screws on every rib

Base metal Limit State Span (mm)
thickness, mm (kPa) 900 1200 1500 1800 2100 2400
Serviceability 8.75 7.93 5.2 3.09
0.7
Strength 10.14 6.40 4.82 4.60
Serviceability 7.93 5.3 3.44 2.2 1.57
0.9
Strength 10.11 8.24 6.76 5.67 5.06

Non Cyclonic based on screws on alternate ribs

Base metal Limit State Span (mm)
thickness, mm (kPa) 900 1200 1500 1800 2100 2400
Serviceability 4.38 3.965 2.60 1.55
0.7
Strength 5.07 3.20 2.41 2.30
Serviceability 3.965 2.65 1.72 1.1 0.785
0.9
Strength 5.06 4.12 3.38 2.84 2.53

Cyclonic based on screws on every rib

Base metal Limit State Span (mm)
thickness, mm (kPa) 900 1200 1500 1800 2100 2400
Serviceability 8.75 7.93 5.2 3.09
0.7
Strength 9.48 5.98 4.5 4.3
Serviceability 7.93 5.3 3.44 2.2 1.57
0.9
Strength 9.45 7.7 6.32 5.3 4.73

Notes:
1. The eave and ridge spans for 0.7mm and 0.9mm should be reduced by
20% and 25% respectively where access to the roof may be required.
Refer to Page 7 for trafficable spans.
2. Design capacities are only applicable for cladding and test
geometries used, with support spacings no larger than those tested.
3. Refer to BlueScope Building Solutions for any further details of
cladding installation not covered in this manual, details of test results
or other design matters.
4. These design capacities are based on legislation and standards that
are current at the time of publication and may be subject to change -
therefore the published capacities should be reappraised by the date
noted.
5. For 1.2mm BMT, use 0.9mm BMT values.
6. Assumes maximum unsupported overhang of 200mm.

PERMALITE® Design Manual 2012 11

2.5 Permalite® Alspan®
This profile was designed specifically to provide a wide
spanning capability, to have a high water-carrying capacity
and to accommodate foot traffic without damage.
All of these requirements are realised in the distinctive ribs
and wide pans which offer a well-defined presentation of
large areas.
Thickness range: 0.70mm 0.90mm
Length Range: 850mm to 23 metres
Pan Cross Section area: 37,500mm2/metre sheet width
Tolerances: Length +0mm, -15mm
Width +0mm, -3mm
Finishes: Mill, Stucco Embossed, Painted

216mm

52mm

30mm
114mm

864mm cover width

950mm sheet width

Figure 2.3 Permalite® Alspan profile

Purlin and girt spacings Eave and ridge spans

The wind loadings used in conjunction with these charts are In relation to wind loads only, the eave and ridge spans are to
to be determined in accordance with AS/NZS 1170.2:2002. be as for intermediate spans but not exceeding 2.70 metres.
The values apply to all ribs of the sheet being fastened with The eave span for 0.70mm thickness should not exceed 1.8
the Permalite® Positive Fix System (refer to page 6). metres where access to the roof may be required.

Table 2.3 Profile properies Permalite® Alspan NOTE: Refer to page 7 for trafficable spans.

Thickness kg/m2 kg/m Section Modulus Moment of Inertia

(mm) Cover Width Length x 103mm3 x 103mm4
0.70 2.66 2.29 8.9 306
0.90 3.42 2.95 11.4 393

12 PERMALITE® Design Manual 2012

Table 2.4 Permalite Alspan: Limit State wind pressure capacities (kPa)
Continuous Spans with all spans equal

Non Cyclonic based on screws on every rib

Base metal Limit State Span (mm)
thickness, mm (kPa) 600 900 1200 1500 1800 2100 2400 2700
Serviceability 8.26 6.20 4.59 3.40 2.55 2.00
0.7
Strength 10.17 8.03 6.42 4.92 3.80 3.00
Serviceability 8.35 6.50 5.03 3.77 2.70 1.93 1.80
0.9
Strength 10.17 7.92 6.10 4.83 4.07 3.39 3.02

Cyclonic based on screws on every rib

Base metal Limit State Span (mm)
thickness, mm (kPa) 600 900 1200 1500 1800 2100 2400
Serviceability 8.26 6.20 4.59 3.40 2.55 2.00
0.7
Strength 9.50 7.50 6.00 4.60 3.55 2.80
Serviceability 8.35 6.50 5.03 3.77 2.70 1.93
0.9
Strength 9.50 7.40 5.70 4.51 3.80 3.39

Notes:
1. The eave and ridge spans for 0.7mm and 0.9mm should be reduced by
20% and 25% respectively where access to the roof may 10.17
be required.
Refer to Page 7 for trafficable spans. 7.92
2. Design capacities are only applicable for cladding and6.10test
geometries used, with support spacings no larger than4.83 those tested.
4.07 of
3. Refer to BlueScope Building Solutions for any further details
cladding installation not covered in this manual, details3.39
of test results
or other design matters. 3.02
4. These design capacities are based on legislation and standards that
are current at the time of publication and may be subject to change -
therefore the published capacities should be reappraised by the date
noted.
5. For 1.2mm BMT, use 0.9mm BMT values.
6. Assumes maximum unsupported overhang of 200mm.

PERMALITE® Design Manual 2012 13

2.6 Permalite® V-Rib
The wide (915mm) cover width of Permalite® V-Rib, in
conjunction with its symmetrical profile, provides a roofing
sheet which can be used effectively on walls also. A double
capillary drain in the rib overlap ensures weather security.
As well as providing a neat, balanced appearance on
buildings, this profile is also effectively used as insulation
jacketing in power stations and chemical processing plants.
Thickness Range: 0.70mm 0.90mm 1.2mm
Length Range: 850mm to 23 metres
Pan Cross Section Area: 16, 342mm2/metre sheet width
Tolerances: Length +0mm, -15mm
Width +0mm, -3mm
Finishes: Mill, Stucco Embossed, painted

25.4mm
25.4mm

31.7mm

101.7mm

915mm cover width

965mm sheet width

Figure 2.4 Permalite® V-Rib profile

Purlin and girt spacings

Wind loadings used in conjunction with the following graphs
are to be determined in accordance with AS/NZS 1170.2:2002.

Table 2.5 Profile properies Permalite® V-Rib

Thickness kg/m2 kg/m Section Modulus Moment of Inertia
(mm) Cover Width Length x 103mm3 x 103mm4
0.70 2.59 2.29 7.88 125
0.90 3.33 2.95 9.91 157
1.20 4.44 3.93 12.74 202

14 PERMALITE® Design Manual 2012

Table 2.6 Permalite V-Rib: Limit State wind pressure capacities (kPa)
Continuous Spans with all spans equal

Non Cyclonic based on screws on every rib

Base metal Limit State Span (mm)
thickness, mm (kPa) 900 1200 1500 1800 2100 2400
Serviceability 8.34 5.5 3.29 1.9 1.26
0.7
Strength 8.45 6.85 5.62 4.60 4.03
Serviceability 8.34 6.02 4.03 2.43 1.5 1.03
0.9
Strength 10.11 9.20 8.35 7.47 6.53 5.62

Non Cyclonic based on screws on alternate ribs

Base metal Limit State Span (mm)
thickness, mm (kPa) 900 1200 1500 1800 2100 2400
Serviceability 4.17 2.75 1.645 0.95 0.63
0.7
Strength 4.23 3.42 2.81 2.30 2.02
Serviceability 4.17 3.01 2.015 1.215 0.75 0.515
0.9
Strength 5.06 4.60 4.17 3.73 3.26 2.81

Cyclonic based on screws on every rib

Base metal Limit State Span (mm)
thickness, mm (kPa) 900 1200 1500 1800 2100 2400
Serviceability 8.34 5.5 3.29 1.9 1.26
0.7
Strength 7.9 6.4 5.25 4.3 3.77
Serviceability 8.34 6.02 4.03 2.43 1.5 1.03
0.9
Strength 9.45 8.6 7.8 6.98 6.1 5.25

Notes:
1. The eave and ridge spans for 0.7mm and 0.9mm should be reduced by
20% and 25% respectively where access to the roof may be required.
Refer to Page 7 for trafficable spans.
2. Design capacities are only applicable for cladding and test
geometries used, with support spacings no larger than those tested.
3. Refer to BlueScope Building Solutions for any further details of
cladding installation not covered in this manual, details of test results
or other design matters.
4. These design capacities are based on legislation and standards that
are current at the time of publication and may be subject to change -
therefore the published capacities should be reappraised by the date
noted.
5. For 1.2mm BMT, use 0.9mm BMT values.
6. Assumes maximum unsupported overhang of 200mm.

PERMALITE® Design Manual 2012 15

2.7 Permalite® Waveline
The classic Australian profile is used in traditional as well as
modern applications.
Permalite® Waveline is available in 2 widths. Traditional
762mm cover width and our 990mm cover width for greater
fixing economy. These cover widths for Permalite® Waveline,
provides a roofing sheet which can also be used effectively
on walls.
Thickness Range: 0.90mm
Other thicknesses available subject to minimum order quantity.
Length Range: 500mm to 18 metres
Pan Cross Section Area: 846mm2/metre sheet width
Tolerances: Length +0mm, -15mm
Width +0mm, -3mm
Finishes: Painted, Mill finish

16mm
76mm

762mm cover

820mm sheet

990mm cover

1048mm sheet

Figure 2.5 Permalite® Waveline Profile

Table 2.7 Profile properies Permalite® Waveline

Thickness mm kg/m
(mm) Cover Width Length
0.90 762 2.3
0.90 990 2.29

Purlin and girt spacings

Wind loadings used in conjunction with the following graphs
are to be determined in accordance with AS/NZS 1170.2:2002.

16 PERMALITE® Design Manual 2012

Table 2.8 Permalite Waveline: Limit State wind pressure capacities (kPa)
Continuous Spans with all spans equal

Non Cyclonic based on screws on alternate ribs (without washers)

Base metal Limit State Span (mm)
thickness, mm (kPa) 900 1200 1500 1800
Serviceability 6.07 2.47 0.90 0.73
0.9
Strength 7.27 5.39 3.58

Non Cyclonic based on screws on every rib with washers

Base metal Limit State Span (mm)
thickness, mm (kPa) 900 1200 1500 1800
Serviceability 6.07 2.47 0.9 0.73
0.9
Strength 9.09 6.74 4.48

Cyclonic based on screws on every rib with washers

Base metal Limit State Span (mm)
thickness, mm (kPa) 900 1200 1500 1800
Serviceability 6.07 2.47 0.9 0.73
0.9
Strength 9.31 7.0 5.0 4.13

Notes:
1. Design capacities are only applicable for cladding and test geometries
used, with support spacings no larger than those tested.
2. Refer to BlueScope Building Solutions for any further details of cladding
installation not covered in this manual, details of test results or other
design matters.
3. These design capacities are based on legislation and standards that
are current at the time of publication and may be subject to change -
therefore the published capacities should be reappraised by the date
noted.
4. For 1.2mm BMT, use 0.9mm BMT values.
6. Assumes maximum unsupported overhang of 200mm.

PERMALITE® Design Manual 2012 17

2.8 Aluminium purlins
The major benefits of aluminium purlins are their corrosion
resistance, ease of handling, and crane-hire savings in
difficult situations.
In areas of applications of difficult access aluminium purlins
(and other structural components) may be handled manually
PERMA
thereby providing substantial savings in crane hire. L ®
ALUMIN ITE
Purlin S IUM
olution
s
The Permalite® brochure Aluminium Purlin Solutions for
Structural Applications provides loading tables, assembly de-
tails, and components is available at www.permalite.com.au

PERM
ALITE
Desig
n Man
ual

2010

PERM
ALITE
The du
Desig
n Man
rable s
olution
ual

to the
toughe
2010
st cond
itions
1

Figure 2.6 Purlin dimensions

Table 2.9 Purlins & Girts Dimensions

Product code: Section Dimensions

No. No. D B A Thickness
mm mm mm mm
C-Sections
C10030 Q1559 100 50 3.0
C15025 G6980 152 38 2.5
C20025 N2207 200 80 2.5
C25030 N2371 250 30 3.0
C30035 N2372 300 100 3.5
Z Sections
Z17525 N2421 175 70 76 2.5
Z17540* Q1560 174 70 74 4.0
Z20025 N2374 200 80 86 2.5
Z25030 N2375 250 90 97 3.0
Z29055* L7570 287 95 5.5

2.9 Circular roofs

Circular roofs may require the sheet to be laid in segments with
radial Hip Caps between each segment. This configuration may
be simplified by the use of a Hip support as shown below which
supports the Hip Cap assembly between purlins. (As shown at
right.)

Figure 2.7
Hip support assembly

18 PERMALITE® Design Manual 2012

2.10 CONVEX CURVED ROOFING Seal length
measured on roof
In addition to aesthetic appeal, curved roofing avoids the
requirement for a ridge cap flashing. This is a benefit on low
slope ridged roofs.
Sheet may be curved over the full width of the roof or curved
only at the ridge. Curved sheet at the eaves may also form
ius
effective sun control, roof drainage or cyclonic security. Rad
There are three methods of curving sheet:
Seal length =
1) Spring curving – Straight sheet is held to the roof curve 0.035 x Radius x specified minimum roof pitch
by the fixing screws, all purlins must be set at 90° to the arc
tangent and there should be no curve between the eave purlins. Waveline
End laps may be used on straight roof sections only. (minmum roof pitch 5): Seal length = 0.18 x radius

2) Crimp curved – This factory process forms a curve by V-Rib

crimping the profile at controlled intervals providing a striking (minmum roof pitch 3): Seal length = 0.11 x radius
visual effect and a small radius of curvature. Concave
curves may also be supplied. Crimp curved ridge caps are LT7 and Alspan
recommended on the basis of their superior strength and lower (minmum roof pitch 1): Seal length = 0.055 x radius
cost compared to the ridge cap flashing system. Figure 2.9
3) Roll curving - This factory process is only suitable for Seal length calculation
Waveline.
2.12 CONDENSATION
2.11 Spring curved roofs Condensation occurs on the underside of all metal roofing when
the roof metal temperature falls below the dew point of humid
Sheets in a spring-arched (convex) roof are curved in a radius
air held against the underside of the roof.
from eave to eave. LT7, Alspan, V-Rib and Waveline can
be spring-curved for an arched roof. Table  2.14 shows the Control of under roof condensation can be affected through the
acceptable radii. reduction of the moisture content of the air under the roof by
one or more of the following procedures.
The top face of all purlins must accurately follow and be
a) Providing ample ventilation, which allows air to move through
tangential to the radius of the arch. The radius of curvature can
the ceiling space.
be calculated from the formula in Figure 2.8
b} Using ceiling linings with a moisture barrier on the upper
surface.
Table 2.10 Recommended radii for convex spring-curving c) Stretching 50mm insulation blanket, with aluminium foil
Minimum Curving Radius laminated to the underside, over the purlins before laying the
roof. All joins in the blanket, and around penetrations, should be
sealed with waterproof adhesive tape.
Of the above b) provides the best ceiling/roof condensation
Alspan (Spring curve) 24 1600 200
control. Although c) may be less effective in controlling ceiling
LT7 (Spring curve) 18 1400 60 condensation it significantly reduces the effect of roof noise.
LT7 (Crimp curve) 0.5 1400 60 Consideration should also be given to the effect of condensation
V-Rib (Spring curve) 18 1400 70 on the underside of exposed exterior roofing such as eaves or
Waveline (Spring curve) 12 1000 30 awning. The unsightly discolouration which can occur may be
avoided by placing a lining underneath with a 100mm air gap
Waveline (Roll curve) 6 1000 30 between the lining and the metal roof. Alternatively, painting the
underside of the roof sheeting will retard discolouration but not
condensation.
2.13 REVERSED PROFILE

Rise A variation to the appearance of walls can be made by fixing

LT7 or Alspan with the pans out thereby creating a bold effect.
However, design capacities, particularly in cyclonic areas may
Width be adversely affected. Contact Permalite® technical staff for
further advice.
Radius
2 2 Figure 2.10
Radius = Width + 4(Rise) Reversed profile
8 x Rise
Figure 2.8
Calculation of radius
PERMALITE® Design Manual 2012 19
2.14 Design of drainage Table 1.4 Design rainfall intensity
Roof drainage systems can be affected by a number of variables
and must be designed and detailed by a suitable qualified trade or
professional. The design of roof drainage aims to protect people,
property and the building. The designed drainage system must be
installed under the supervision of a qualified trade or professional.
The steps of the design process are illustrated below.
1. Determine average recurrance interval (ARI)
2. Obtain rainfall intensity of site
3. Work out roof dimensions.
4. Determine catchment area with slope
5. Determine area for proposed eaves gutter.
6. Determine catchment area per downpipe
7. Determine number of downpipes required
8. Determine location of downpipes and high points
9. Check catchment area for each downpipe.
10. Determine downpipe size

11. Determine overflow measures

More guidance is given in BCA, AS/NZS 3500.3:2003, HB114:1998
and Bluescope Lysaght publication - Roofing & Walling
Installation Manual.

2.15 General Rainwater System Design

Recommendations
The Minimum gutter fall should be 1:200 for effective gutter
operation and prevention of ponding.
Gutter lengths should not exceed 12.0 metres, on site joints
within this length should be as recommended herein. Bridge
expansion gap with an aluminium saddle flashing fixed to one
gutter only.

Table 1.3 maximum lengths for drainage (m)

Alspan® Roof Slope (degrees) Waveline® Roof Slope (degrees)

Intensity Intensity
(mm/hr) 1º 2º 3º 5º 7.5º 10º 15º 20º 25º (mm/hr) 5º 7.5º 10º 15º 20º 25º
100 357 445 522 649 774 890 985 1095 1188 100 23 28 32 35 39 42
150 238 297 348 433 516 593 657 730 792 150 15 18 21 23 26 28
200 179 222 261 325 387 445 492 547 594 200 12 14 16 18 20 21
250 143 178 209 260 310 356 394 438 475 250 9 11 13 14 16 17
300 119 148 174 216 258 297 328 365 396 300 8 9 11 12 13 14
333 107 134 157 195 232 267 296 329 357 333 7 8 10 11 12 13
500 71 89 104 130 155 178 197 219 238 500 5 6 6 7 8 8

LT7® Roof Slope (degrees) V-Rib® Roof Slope (degrees)

Intensity Intensity
(mm/hr) 1º 2º 3º 5º 7.5º 10º 15º 20º 25º (mm/hr) 3º 5º 7.5º 10º 15º 20º 25º
100 90 111 131 163 194 223 247 274 298 100 161 200 239 275 304 338 367
150 60 74 87 108 129 149 165 183 198 150 107 134 159 183 203 225 245
200 45 56 65 81 97 111 123 137 149 200 81 100 120 137 152 169 183
250 36 45 52 65 78 89 99 110 119 250 64 80 96 110 122 135 147
300 30 37 44 54 65 74 82 91 99 300 54 67 80 92 101 113 122
333 27 33 39 49 58 67 74 82 89 333 48 60 72 83 91 101 110
500 18 22 26 33 39 45 49 55 60 500 32 40 48 55 61 68 73
20 PERMALITE® Design Manual 2012
2.15.1 Box gutters 2.17 Roof slopes
Box gutters should be fabricated from aluminium sheet Minimum
preferably of alloy 5251 or 5005 and of the next standard
On very low slopes care must be taken to ensure that purlin sag
thickness to the thickness of the roof i.e. 1.2mm thick
or misalignment does not result in water ponding on the roof,
box gutter for 0.9mm thick roof. The minimum aluminium
particularly if end laps are used.
thickness for box gutters is 0.90mm.
At low slopes, say around 1 in 50 (1°) slope, all roof supports must
Box gutters must be adequately supported on sides and
be in the one plane because slight variations can result in zero or
bottom in consideration of their full water load, and the
negative fall. This may occur even after completion of the building
possibility of being used as footways. Box gutters should
be designed and installed in accordance with AS/NZS as the result of settlement, timber warping or shrinking, or extra
3500.3:2003, AS/NZS 2179.1:1994, HB114:1998 and the BCA. loadings (like air conditioners).
Generally, the sides should be supported by framework or
Minimum recommended roof slopes are listed in this document. As
purlins, if not, sides should be stiffened.
a guide, wherever possible, you should design for a minimum slope
Fastening the gutter to the framework or purlins should only of 1 in 30 (2°). Roof slopes lower than the recommended minimum
be done at the outlet end. The remainder of the gutter should may be available subject to enquiry and will be dependent upon
be free to move. the roof application and building details.
Overflashings are not to be fastened to the gutter and saddle Maximum
flashings between gutter ends are to be fastened to one
gutter only. Fixings, supports and outlets must allow complete The high discharge velocity of rainwater from slopes over 25°
freedom for thermal movement of the gutter. The gutter as a can result in side lap leakage. Where the slope exceeds 25°,
whole must not be restrained in any way. a continuous run of silicone sealant is to be placed under the
outer leg of the side lap during sheet installation.
Drop sumps should be provided at outlets to increase the
flow efficiency from gutter to downpipe. Sumps should be a
Table 1.5 Roof Slopes LT7 Alspan V-Rib Waveline
square by the width of the gutter and have a depth of not less
than one quarter of the gutter depth. Overflows should be Minimum slope
provided by spouts at the gutter ends or by secondary sump - no end laps 1º 1º 3º 5º
outlets as shown.
Minimum slopes
Eave and box gutter joins may be made using silicone sealant
provided the join consists of overlapping surfaces separated
- sealed end laps 3º 3º 6º 5º
by silicone sealant and fastened by two lines of staggered Minimum slope
rivets. - unsealed end laps 6º 6º 10º 5º
Blind rivets used to join gutter sections must be of aluminium
only, the heads of the rivets should be on the outer surface.
Maximum slope
- unsealed side laps 25º 25º 25º 25º
Alternatively joints may be made by TIG Aluminium welding;
soldering or brazing is not recommended.

2.16 Turn up roof cladding

At the high end of roofing, wind can drive water uphill, under
the flashing or capping, into a building. To minimise this
problem, you turn up the valleys (or pans) at the high end of
roofing.
(The process is called turning-up (or stop-ending).
All roofing on slopes below 1 in 2 (25°) should be turned-up.
During the turn-up operation, care should be exercised to
prevent tearing or puncturing the steel sheets.
You can turn-up sheets before or after they are fixed on the 1.3 V-RibTurn-up
FigureV-Rib tool
turn-up tool
roof. If you do the latter, you must have sufficient clearance
for the turn-up tool at the top end of the sheets (about 50mm).
Turning-up Waveline
CUSTOM ORB
With pliers, multi-grips or a shifting spanner closed down
to approximately 2mm, grip the valley corrugations 20mm in
from the end of the sheet and turn up as far as possible. Be
careful not to tear the sheet.
Turning-up V-RIB, Alspan and LT7
Slide an appropriate turn-up tool onto the end of the sheet as
far as it will go. Holding the tool against the end of the sheet, Figure 1.4
pull the handle to turn up the tray about 80°. Turning-up Waveline
PERMALITE Design Manual 2012
® 21
3.0 Installation into the gutter. The ridge and eave ends are to have the pans
upturned and downturned respectively. End forming tools are
3.1 Safety available for this purpose. Roof slopes greater than 25° require
It is most important for safety reasons that during sheet laying side lap sealing, with a continuous run of silicone sealant.
walking on the roof is reduced to an absolute minimum and 3.6 Sheet Cutting
along the purlins only. See Section 2.14 Walking on Roofs.
Where possible, you should minimise site-work by using sheets
3.2 Preparation cut to length in the factory. Aluminium is best cut with a wax-
Before commencing to lay the sheet, consideration should be lubricated fine tooth circular saw.
given to the installation of gutter and eave flashings, insulation 3.7 Wall Cladding
and the location of roof penetrations such as vents, skylights
etc. Wherever possible, commence fixing farthest from the
expected direction of the heaviest wind or rain. Where more
A pencil of any colour may be used except black or so-called than one length is used for the wall height an overlap of 100mm
lead pencils. Don’t use black pencils to mark roofing or walling should be allowed at a girt with the upper sheet overlapping the
because the graphite content can create an electric cell when lower as for roofing end laps.
wet and thus cause deterioration of the finish. You can also use
a string line with chalk dust, or a fine, felt-tipped marker. For non cyclonic applications, the sheet is hard fixed to steel
girts through the pan next to the rib using the RA018 stitching
3.3 Squareness screws at purlins and equal mid span points but not exceeding
750mm.
Check the roof or wall structure for squareness before
commencing to lay sheet. Sheet must be laid square to the For cyclonic applications wall sheeting shall be installedas per
ridge wherever practical. Out-of-square which exceeds 100mm cyclonic roof sheeting (ie with washer at each rib)
over the sheet length should be corrected by trimming the edge
Note: Expansion fixing notes are at Section 3.16 of this Manual.
of the sheet laid against the out-of-square edge. Any sag of
purlins should be corrected before commencement, particularly 3.8 Post Painting
on low-pitch roofs to avoid water “ponding”.
Manual post painting is generally not recommended. Where
If insulation is to be laid on wire mesh, the mesh should be there is no other option, we advise the following:
laid first. Insulation should be laid with the roofing to avoid the
Flashings which are to be painted by the installer should first
possibility of rain wetting the insulation.
be washed with household detergent and dried. The flashing is
3.4 Purlin Isolation then painted with an etch primer and finally brush painted with
the colour coat.
In most situations the face of a dissimilar metal or timber
support, against which the sheeting is fastened, is to be painted Standard colours may be obtained on enquiry to major paint
with chromate based primers/bitumous paint or good quality manufacturers.
(and appropriate width) adhesive PVC tape.
Touch up of scratched to pre-painted sheet should be by brush
3.5 Sheet Installation only. Spray paints may fade prematurely.
Customary practice is to lay out an area of sheet and secure 3.9 Translucent Sheeting
each sheet with a crest fastener at the centre of the ends and
Translucent fibreglass sheet is available in the Permalite
middle, at the same time checking the profile to avoid profile
LT7®, Permalite Alspan®, Permalite Waveline® and Permalite
spread. The area of sheet laid out should be no more than that
V-Rib® profiles.
which can be fully fixed within the day of laying. When the area
of sheet has been laid, install side lap fasteners and then the The recommendations for end lapping roofing sheet apply also
balance of crest fasteners. See Sections 3.15-3.18. to the placement of translucent sheets into a roof.
Wherever possible commence laying the sheet farthest from Because of slight differences in profile all overlapping surfaces
the expected direction of the heaviest rain or wind and from the should have silicone sealant placed between them and the side
eave toward the ridge. laps should be fastened with Bulb-Tite® fasteners or similar at
not more than 400mm centres. Fasteners must have a sealing
The top end of the sheet should be not more than 100mm from
washer under the head. All ribs at the ends of the sheeting, and
the ridge or fascia line and the bottom end should extend 50mm
alternate ribs at intermediate purlins, are to be fastened with
crest fasteners and washers.
3.10 Sealants
Silicone sealants used with aluminium sheeting must be
neutral cure, however in some roofing applications a non-
curing sealant may be required. (Please refer to Permalite® for
advice.) Neutral-cure silicone sealants:
• have good adhesion to the clean surface of all our roofing
and walling;
Figure 3.1 Commencing installation • are water resistant and non-corrosive;

22 PERMALITE® Design Manual 2012

• are resistant to extremes of heat and cold while retaining 3.13 Fastenings
good flexibility;
The Permalite® Positive Fix fastening system (Figure 3.3)
• excellent gap fillers; consists of four components assembled as shown. The screw
• provide high resistance to ultra-violet rays (sunlight); and may be driven into the pre-drilled hole with a screw gun at a
• have a long service life. maximum speed of 300 R.P.M.
• They are NOT adhesives. 3.14 Fixings
3.11 Welded Joints Permalite® provides a range of fixing screws and washers to
Where possible the units should be fully shop welded using provide all aspects of fixing the roofing sheet and flashings.
the TIG method. Gas welding or soldering is not acceptable The specification of fixings supplied by Permalite® is aimed
and should not be used. at matching the durability of the roofing sheet. Purchase of
inferior alternatives from other sources should be avoided.
3.12 Installation instructions
3.14.1 Crest Fasteners – The Permalite® Positive Fix
3.12.1 Ordering Sheet system provides full security against wind uplift and water
The quantity and length of sheet should not be determined penetration whilst at the same time allowing movement of the
from drawings but from actual measurements of the structure roof sheeting and roof structure due to thermal expansion or
making due allowance for squareness of the structure. contraction.
Where sheets are to be lapped, the minimum lap length 3.14.2 Valley Fasteners – used mainly for wall fixing to steel
on the underlapped sheet will be 300mm and must occur girts, the stainless steel self-tapping fastener RA014, RA114
over a support. The longest sheet to be used is 23 meters. or RAO018 with an aluminium/rubber bonded washer is hard
Requirements in excess of this 23m length are to be met fixed into the girts. (Refer to Table 3.5 Fastener Specifications
by end lapping sheets or providing a step in the roof. An on page 26.)
additional 50mm is to be allowed for gutter overhang.
Remember that lengths that exceed 12.0 metres may incur 3.14.3 Flashing and Side Lap Fastening – the RA018 self-
additional transport costs. drilling stainless steel screw fastens aluminium sheeting and
flashings firmly together.

Table 3.1 Use or Fasteners

Fixed to: LT7 Alspan V-Rib Waveline

Crest fixed to steel greater than 3mm RA015 RA013 RA015 RA015
Crest fixed to steel less than 3mm but greater than 0.75mm or aluminium less than 5mm
but greater than 2mm RA115 RA116 RA115 RASH1450
Crest fixed to steel between 0.42mm and 0.75mm or alluminium between 1mm and 1.9mm RA010 RA019 RA010 RATH1450
Crest fixed to timber RA010 RA019 RA010 RATH1450
Valley fixed to steel greater than 3mm RA014 RA014 RA014 RA014
Valley fixed to steel less than 3mm but greater than 0.75mm or aluminium less than 5mm
but greater than 2mm RA114 RA114 RA114 RA114
Valley fixed to steel between 0.42mm and 0.75mm or alluminium between 1mm and
1.9mm RA018 RA018 RA018 RA018
Valley fixed to timber RA010SP RA010SP RA010SP RA010SP
Sidelap Fastening RA018 N/A RA018 N/A
Flashings to roof sheet RA018 RA018 RA018 RA018
Flashings thru roof sheet to supports As per crest fix fastener for sheet

Table 3.2 Use of washers

LT7 Alspan V-Rib Waveline
Formed washer RA023 RA137 BP082 RAWLCYCP
Hard fix Rib seal RA036 RA039 RA039 RAWLCYSW
Expansion Fix Rib seal RA033 RA041 RA041 RAWLCYSW
NOTE: Hard fix top 6m of each sheet.

Table 3.3 Rib Fasteners ( per metre of purlins) - non cyclonic

LT7 Alspan V-Rib* Waveline
Intermediate Purlins 4.5 (1) 4.6 6.0 4.6
Eave/Ridge Purlins 7.8 4.6 10.0 4.6
Side lap stitching RA018 (2) 3.4 2.3 2.2 2.3
Girts RA014/RA018 4.5 (1) 4.6 6.0 4.6
* V-Rib: 5 fasteners/sheet
1. Based on fixing alternate ribs.
2. Based on 1.5 metre purlin centres, to be increased proportionally for
each 500mm increase in purlin centres.

PERMALITE® Design Manual 2012 23

3.2 Fastener positions (Non Cyclonic)

Non cyclonic fasteners Cyclonic fasteners

PERMALITE LT7 Fasten alternate ribs (Do not fasten overlap ribs unless all ribs are fastened.) PERMALITE LT7 Fasten all ribs with cyclonic washers
(s=side lap screw) (Do not fasten overlap ribs unless all ribs are fastened.)
(s=side lap screw)

PERMALITE ALSPAN 4 Fasteners per sheet width PERMALITE ALSPAN 4 Fasteners per sheet width,
Fasten all ribs with cyclonic washers

PERMATITE V-RIB 5 Fasteners per sheet width PERMATITE V-RIB 5 Fasteners per sheet width.
Fasten all ribs with cyclonic washers

PERMALITE WAVELINE 762 5 Fasteners per sheet at alternate ribs. (Fasten at overlap ribs.) PERMALITE WAVELINE Fasten all ribs with cyclonic washers. (Fasten at overlap ribs.)
PERMALITE WAVELINE 990 7 Fasteners per sheet at alternate ribs. (Fasten at overlap ribs.)
S= Side lap fasteners as per Section 3.18.
Figure 3.2 Fastener positions
NOTES: 1. Side lap fasteners are not required for Alspan.
2. Screws should be placed on every rib in non cyclonic areas to get better wind pressure capacity.
3. Pan fixing uses the same pattern as shown here for crest fixing.
3.15 Pierce-fixed roof fixing 3.16 Types of Pierced Fixings
The Permalite® Positive Fix System provides for thermal Hard Fixing
expansion of the roofing sheet by “hard” fixing at the top “Hard” fixing is used where sheet lengths are such that thermal
of the sheet slope with “expansion” fixing being used to expansion in not a significant issue ie 9m or less.
accommodate expansion towards the lower end of the sheet In applications where Taptite fasteners (RA014, RA015, RA013)
slope. or Type 17 (RATH1450, RA10, RA014) are used, the appropriate
For both types of fastening the screw should be screwed down pilot hole should be drilled through the sheet and purlin as per
until it presses on the washer with a medium pressure. Under Table 3.4. The hole in the Permalite sheeting should then be en-
no circumstances should the screw be overtightened to the larged to 6-6.6mm diameter after which the fastener is installed.
point where the formed washer, or the bonded washer under In applications where (RA010, RA018, RA019, RA115 RA116
the screw head, commence to distort RATH1450, RASH1450) Self drilling screws are used, then a
6- 6.5mm diameter hole should be drilled through the sheet prior
to installation of the fastener.
Expansion fixing
Screw For roof lengths in excess of 9m, “Hard” fixing is used for the
Bonded washer first 9m from the ridge or skillion head. Expansion fixing is used
Formed for the remainder of the sheet length and follows the same pro-
washer cedure as hard fixing with the exception that the hole in the rib
crest is slotted after drilling the tapping hole, using tool RA165
Rib seal Slot
for LT7, Alspan and V-Rib profiles. For Waveline, expansion is
provided by drilling an 8mm hole in lieu of slots noted above. On
Teflon® large projects contact your Permalite® sales representative
side up regarding use of this tool (RA165). Note that for expansion fixing
Rib Rib
a rubber washer with an elongated hole and Teflon facing on
one side is used. This washer must be installed with the Teflon
Expansion side facing up toward the head of the screw.
Hard Fixed fixed Wall cladding
Figure 3.3: Permalite® Positive Fix fastening system 3.3 Non cyclonic wall sheets may be pan “Hard” fixed up to
23m in length using fasteners as per table 3.1.
Cyclonic wall sheets must be crest “Hard” fixed with washers
up to 23m in length. Long lengths of flashings may likewise be
“Hard” fixed. However in regions of high temperature variations
it is is advisable to consider expanding sheeting holes to 7mm
for both flashing and wall sheeting applications.
Figure 3.4 Slot
24 PERMALITE® Design Manual 2012
Self Tapping Screws
Pilot holes are to be drilled in accordance with the following chart:

Table 3.4 Pilot hole Drill Diameter (mm) - Metal Thickness (mm)
Aluminium Steel Timber
Fasteners upto up to 2.0mm - .42mm to 1.2mm - 5.0mm -
Hardwood Softwood
1.2mm 2.01mm 5.0mm .75mm 5mm 6.5mm
304 / 316 RA015, RA013 N/S 5.2 5.3 N/S 5.6 5.7 N/S
grade RA010, RA019 Self drilling 4.5 5 Self drilling N/S 4 Self drilling
Stainless RA114, RA115, RA116, Self drilling N/S Self drilling N/S N/S
Steel RA018 Self drilling 3.5 4 Self drilling N/S Self drilling
Notes: N/S = Not Suitable
At speeds over 300RPM lubrication may be required when driving fasteners into hot rolled steel sections especially using 316 stainless steel fasteners.
Taptite screws (RA015, RA013, etc.) should not be installed with impact driver-type screw guns as this may damage screw threads.

3.17 End laps 300mm minimum

60mm
When end laps are used the lower sheets are fixed first, without min.
holes being drilled for fasteners to the purlin at the top of the
sheet slope. When the next sheet up the roof slope is laid the
sheet is first temporarily secured as in Sheet Installation and
then fixed from the upper end towards to lower. Where the Spacing varies for
different profiles. Pierce-fixed
sheet overlaps the previously laid sheet, the end of the top Waveline is shown.
sheet is lifted and the rib crest slotted using special slotting tool through crest
RA165. The top sheet is lowered and a tapping hole drilled, at
the centre of the top sheet slot, through the lower rib into the
purlin with the fastener then being installed.
NOTE: Fastener driving speed must not exceed 300 R.P.M

3.18 Side laps

All side lap fasteners RAO18 should be installed after the sheet Self-drilling screws
is temporary fixed and before all crest fasteners are installed. with EPDM sealing
The fasteners are placed in the centre of the rib crest and at washer next to ribs 40mm minimum
equal spacings between purlins but not exceeding 500mm.
When installing the fasteners, place one foot on the overlapping
ribs to ensure they are firmly together. 60mm minimum

Pierce-fixed
through pan

Figure 3.6
Fastening V-Rib

Figure 3.5
Side-laps
PERMALITE® Design Manual 2012 25
3.19 Fastener Specifications

LT7® V-RIB®
RA015 RA015
14X65 hex. head stainless steel 14X65 hex. head stainless steel
Taptite® self tapping screw with Taptite® self tapping screw with
aluminium bonded washer aluminium bonded washer

RA010 RA010SP
14X75 hex. head stainless steel 14X35 hex. head stainless steel
Type 17 screw with aluminium Type 17 screw with aluminium
bonded washer bonded washer

RA010SP
RA018
14X35 hex. head stainless steel
12X20 hex. head stainless steel
Type 17 screw with aluminium
stitching screw with aluminium
bonded washer
bonded washer

RA018
RA114
12X20 hex. head stainless steel
14X31 hex. head stainless steel
stitching screw with aluminium
Teks® self drilling screw with
bonded washer
aluminium bonded washer

RA114
14X31 hex. head stainless steel RA115
Teks® self drilling screw with 14X70 hex. head stainless steel
aluminium bonded washer Teks® self drilling screw with
aluminium bonded washer

RA115
14X70 hex. head stainless steel RA014
Teks® self drilling screw with 14X25 hex. head stainless steel
aluminium bonded washer Taptite® self tapping screw with
aluminium bonded washer

RA014
14X25 hex. head stainless steel
BP082
Taptite® self tapping screw with
57x27mm aluminium formed
aluminium bonded washer
washer with 6mm diameter hole

RA023
57x20mm aluminium formed
washer with 6mm diameter hole
RA041
50X25x2mm EPDM/Teflon flat
washer with slot with Teflon face
on one side.

RA033
22X20x2mm EPDM/Teflon flat
washer with slot. Teflon faced RA039
on one side 50X26x2mm EPDM flat washer
with 6mm diameter hole

RA036
22X20x2mm EPDM flat washer
with 6mm diameter hole

26 PERMALITE® Design Manual 2012

ALSPAN® WAVELINE®
RA013 RA016
14X75 hex. head stainless steel 14X50 hex. head stainless steel
Taptite® self tapping screw with Taptite® self tapping screw with
aluminium bonded washer aluminium bonded washer
RA010SP RA010SP
14X35 hex. head stainless steel 14X35 hex. head stainless steel
Type 17 screw with aluminium Type 17 screw with aluminium
bonded washer bonded washer

RA019 RATH1450
14X90 hex. head stainless steel 14X52 hex. head stainless steel
Type 17 screw with aluminium Type 17 screw with aluminium
bonded washer bonded washer
RA018
RA018
12X20 hex. head stainless steel
12X20 hex. head stainless steel
stitching screw with aluminium
stitching screw with aluminium
bonded washer
bonded washer
RA114
14X31 hex. head stainless steel RA114
Teks® self drilling screw with 14X31 hex. head stainless steel
aluminium bonded washer Teks® self drilling screw with
aluminium bonded washer
RA116
14X90 hex. head stainless steel RASH1450
Teks® self drilling screw with 14X52 hex. head stainless steel
aluminium bonded washer Teks® self drilling screw with
aluminium bonded washer
RA014 RA014
14X25 hex. head stainless steel 14X25 hex. head stainless steel
Taptite® self tapping screw with Taptite® self tapping screw with
aluminium bonded washer aluminium bonded washer

RA137
65x30mm aluminium formed
washer with 6mm diameter hole RAWLCYCP
Waveline stainless steel cyclonic
plate

RA041
65X25x2mm EPDM/Teflon flat
washer with slot. Teflon faced on
one side RAWLCYSW
Wavelinecyclonicsealing washer
for under cyclonic plate (Hard fix
only)
RA039
50X25x2mm EPDM flat washer
with 6mm diameter hole

PERMALITE® Design Manual 2012 27

4. Typical flashing details
4.1 Flashing Materials
It is very important that flashings be made from materials
that are compatible with the cladding (See note on Dissimilar
Metals p28).

Lead flashing is not recommended, however it will usually be

retained when re-roofing, because it is usually cemented into
the structure. In these cases:

• the top surface of the lead flashing must be painted

with a good quality exterior paint system (to limit
contamination with lead compounds in water running
off the flashing); and

• there must be a barrier between the lead flashing and

the cladding: either a plastic strip (such as polythene
dampcourse), or paint.

Flashings should conform to AS/NZS 2179.1:1994, and be

compatible with the cladding (see note on Dissimilar Metals
p28).

Materials for flashings are available in Mill or Painted Figure 4.1

finishes. Barge flashing
4.2 Roof Flashing
Flashings and cappings are strips of metal formed to
weatherproof the edges of roofing and walling.
For the purposes of this chapter, only the term flashing is
used.
The following sections should be considered as a guide only.
For a comprehensive account of flashing guidelines, refer to
AS/NZS 3500.3:2003.

Similar methods of flashing are used for different cladding-

profiles. You can adapt the principles to suit your application.
In all cases it is important to have ample cover provided by
the flashing and proper turn-up of the cladding underneath.
The correct installation of flashings to seal the roof
perimeters or penetrations is essential to the security and
weathertightness of the roof. Consideration should be given
to movement between the roof and building walls and to
length expansion of flashings.
Figure 4.2
Permalite® is able to supply a range of flashings which are Longitudinal flashing
provided to the same metal specification as the roofing sheet.
Where custom made flashings are required the metal should
be to the following specification. Be careful when moving between supports. Do not walk in the
Alloy: 5251/5052 preferred, 5005 alternatively. pan immediately adjacent to flashings or translucent sheeting.
Walk at least one pan away.
Temper: H38 Thickness: 0.90mm
Bend Radius: 0.90mm unpainted sheet. Permalite® supplies custom flashings to your requirements –
1.80mm pre-painted sheet ask your local service centre for details.
4.3 Barge Flashing 4.4 Longitudinal flashings
The installation of this flashing must allow for movement The pans or valleys, and are made to suit the cladding profile.
between the roof sheeting and the wall parallel to the edge
They should have an edge turned-down to dip into the pan or
of the sheeting. The following fixing procedures are recom-
valley.
mended.
NOTE: Where overlaps occur on the roof a corresponding 4.4.1 Flashing Cover
overlap is to be made in the barge flashing. The minimum recommended cover of longitudinal flashings over
cladding should be taken from AS/NZS 3500.3:2003.
28 PERMALITE® Design Manual 2012
 Every 3rd rib
4.5 Transvers flashings (minimum)
Transverse flashings run across the pans or valleys. They Every 3rd rib
(minimum)
usually have a stiffening lip, along the lower edge, which
is turned-down to dip into the pan or valley. To maximise
weatherproofing, the bent lip is fashioned to fit the profile.

The turn-down for transverse flashings for Waveline can be

fashioned to fit the profile by either notching or scribing to
match the corrugations, or lightly dressed into the valleys.
The type of fashioning (if any) depends upon profile shape
and the type of material used to flash. Fashioning is preferred
for low-slope roofs. Figure 4.3
Ridge capping
The turn-down for transverse flashings for wide panned
Every 3rd3rd
Every rib rib
cladding is always notched or scribed to fit over the ribs. (minimum)
(minimum)
4.5.1 Flashing Cover
Permalite® can produce a range of flashings to suit your needs
and design (hip, barge, apron). To increase weathertightness,
Permalite® recommends you maximise the overlap between
flashings and claddings.
4.5.2 Fixing of Flashings
Longitudinal flashings shall be fastened at maximum 500mm
centres.Transverse flashings shall be fastened in accordance Figure 4.4
with AS/NZS 3500.3:2003, as detailed below. Fascia capping

Figure 4.5 Every 3rd rib

Parapet flashing (minimum)

4.6 Flashing small roof penetrations

A flanged cylindrical sleeve is a fairly simple method of flashing
Every 3rd rib
around small penetrations (such as pipe (minimum)
penetrations) which fit
between the ribs of a roof sheet, or penetrate only a single rib.
The flange around the base of the sleeve can be contoured by
hand to match the cladding profile before it is sealed and fixed
to the cladding.
Be careful not to dam any valleys or pans so that rainwater can
drain freely from the high side of the roof penetration.

Figure 4.6
Small penetration with sleeve (Dektite® sleeve illustrated)
PERMALITE® Design Manual 2012 29
4.7 Flashing large roof penetrations
Penetrations through ribbed cladding block the valleys (or
pans), and thus affect the free flow of rainwater down a roof.
All flashings have to weatherproof the cladding – but on the
uphill side of large penetrations, they also have to channel
rainwater sideways into valleys that run unobstructed to the
eaves.

Four methods are described here. In all methods the ends of

cut ribs may be closed off with caps on the outside of the rib,
or with plugs inside the ribs. Plugs must be used on side-laps
to allow the anti-capillary cavity to drain.

Note: For masonry construction, Building Code Australia

(BCA) requires the use of Damp Proof Course (DPC) to
ensure weatherproofing. For acceptable methods see BCA
section on weatherproofing masonry.

Support framing
Wherever one or more of the sheet ribs are cut, you must
provide framing to support the cut ends of the roof cladding Figure 4.7 Method 1: Head gutter and apron flashings
each side of the penetration.

Existing flashing
If you have to re-use lead flashings that are built into the
structure, special protection is needed.

Method 1: Head gutter and apron flashings

This is often the simplest method, and commonly used for
existing protrusions.

Method 2: Flat tray and sleeve

To avoid fitting and sealing end caps to all the sheet ribs on
the low side of the penetration, an apron flashing can be
fitted to the sleeve and sealed to the tray each side.

Method 3: Tray gutter for steeper roofs

If the roof pitch is more than, say 1 in 12 (5°), you cut the roof
cladding sufficiently high above the penetration to allow a
tray gutter to raise rainwater over the top of the sheet ribs Figure 4.8 Method 2: Flat tray and sleeve
and divert it around the penetration.

Figure 4.9 Method 3: Tray gutter for steeper roofs

30 PERMALITE® Design Manual 2012

5.0 insulation 5.3 Heat control methods
In summer buildings get hot from the sun and we want to In roofs, a simple, inexpensive and very effective method is to
cool the inside; in winter we often heat the inside and want to drape a membrane of reflective foil laminate over the supports
avoid losing that heat. Factors in controlling heat include: before laying the cladding. The laminate can also provide a
vapour barrier to minimise condensation. If the membrane
• the orientation of the building relative to the sun;
is allowed to drape 50 to 75mm between the supports the
• external shading from trees or other buildings; air space between the membrane and the roof cladding will
• design of the building, especially ventilation and further improve heat insulation
sealing
at doors and windows; For installation instructions, refer to the LYSAGHT Roofing &
Walling Installation Manual, which is available at:
• the colours and surface gloss of the cladding.
www.lysaght.com.
The first three factors are outside the scope of this book.
Heat is absorbed into a sheet on one side, and some of that
absorbed heat is re-radiated from the other side. Insulation
• L ight-coloured or shiny surfaces don’t absorb much heat, Reflective Foil
and they radiate little.
• Dark-coloured or dull surfaces absorb a lot of heat,
and they radiate a lot. This doesn’t stop you using darker
claddings because you can use reflective foil laminate
under the cladding.
5.1 Insulation materials
Typical insulation materials are reflective foil laminates,
insulation blankets or batts made from fibreglass, and boards
made from polystyrene. Remember that the colour of cladding Reflective foil laminate is simple, cheap
also has a marked effect. and very effective
Foil laminates
Foil laminates reflect heat and can double-up as a vapour Blankets & Reflective Foil
barrier to control condensation. Where they are used as
(other insulation types available)
a vapour barrier the joints between successive strips are Roofing
overlapped about 100mm, and sealed with a tape impervious Insulation blanket
to moisture.

Blankets and batts

Blankets and batts minimise heat convection and are
available with the laminate bonded to the fibreglass. They are
also effective in reducing noise.

Insulation blankets must be protected from moisture,

particularly around the edges of the roof and even more
particularly at the bottom end of the cladding where
rainwater run-off can be blown back under a low-pitched
roof. If the blanket overhangs the bottom support, it may
even come into contact with water in the gutter, where the
insulation will absorb moisture and remain damp for extended
periods, thus leading to deterioration of the coating on the
underside of the roofing and reducing the effectiveness of the
insulation.

Polystyrene boards
Expanded and extruded polystyrene is also used for the
same purposes as blankets and batts. The boards are Figure 4.9 Typical roof insulation with foil or combined foil
more rigid and relatively less compressible which demand and blanket insulation
different fixing to that mentioned above. Seek advice from
manufacturers of polystyrene insulation.

5.2 Insulation thickness (glass wool)

Insulation blankets and batts can cause cladding to bow
out between the fasteners. To minimise this problem, the
maximum thickness of blankets and batts should be 100mm
for pierce-fixed cladding. (Maximum density 12kg/m3. For
more dense glass wool and rock wool, and thicker insulation,
spacers are recommended.
PERMALITE® Design Manual 2012 31
6.0 Accessories

LT7 ALSPAN V-RIB

NOTE: Accessories which do not carry an RA designation BP073
are not held in stock but may be available subject to enquiry. Foam closure strip
Colours are not necessarily in stock. - internal/external 910mm long

57mm
RA154
RA092 Foam closure strip 25mm WAVELINE
Foam closure strip 25mm - external 854mm long
- external 890mm long

56mm RAWL762
Foam closure strip
RA156 - internal/external 762mm long
RA093 20mm
Foam closure strip
Foam closure strip 25mm - internal 860mm long
- internal 890mm long

20-40mm
20-40mm

All Profiles
Expansion Slot Punching Tools
RA185 Slotting Tool (Hammer) for LT7 or Alspan/V-Rib
RA161 Spare blade for RA185
RA165 Slotting Tool (Standing) for LT7 or Alspan/V-Rib
RA166 Spare blade for RA165
RA190 Profile adaptor for RA165 or RA185

32 PERMALITE® Design Manual 2012

7.0 Independent engineering certification (roof sheeting)

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NE 0 E N .……
3 64 VONPO PORT ….
241 R
611 T
SUIT
E 17
109
– 11
0
P.O.B MOO MAIN
OX 7 NAH ROA
, D,
PHO 130 DEV HOBAR
NE 0 O T
3 62 NPORT
78 3
190

PERMALITE® Design Manual 2012 33

 land
Queens

     


 
 




     



 
  
  
  
     
   
   
   
   
  
 
 

 




 

    
 

       
   
  

     
         
  
  
    
   


  

   

 

  
 
    

  
 

 
    

  
 
   
  
    

  
   
  
  
    
  
    
 


  
 


 
  
   
      

  

 
 
  
 




  

   



  

   

   
           
   


 
 
      
 
  
  
 




  


 

  
     

  
      
 
 


  
  
     
 
 

  


 






  
  


 
  

 



 
 

 
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7130 DE RT
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34 PERMALITE® Design Manual 2012

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Western Australia


R.E.PROUD AND ASSOCIATES PTY.LTD
Trading as RPA ENGINEERS
ABN 51 006 731 451
rpa@meridianalliance.com.au

Building Act 1993

Building Regulations 2006
Regulation 1507: certificate of compliance – DESIGN

Relevant Builder: Bluescope Buildings

From: Ross Eric Proud

Building Practitioner Registered No. EC1039
Address: 14 Victoria Street, Ballarat 3350
P.O. Box 2125 Bakery Hill 3354

Property Details: Bluescope Buildings

Permalite Aluminium Roof Sheeting Design Manual
Compliance:
This Structural Design Certificate hereby certifies the design of the “Permalite Aluminium Roof
Sheeting System” for the above mentioned project as detailed in drawings listed in reference
Documentation:
Permalite Aluminium Roof Sheeting Design Manual

Complies with the following provisions of the regulations:

Roof Sheets have been designed in accordance with the requirements of the listed
Engineering Standards to sustain the specified design loads.

Building Code of Australia Volume Part/Section

Australian Standards
AS/NZS 1170.0:2002 Structural Design Actions: Part 0: General Principles
AS/NZS 1170.1:2002 Structural Design Actions: Part 1: Permanent, imposed and other actions
AS/NZS 4600:2005 Cold-formed Steel Structures
AS/NZS 4055:2006 Wind Loads for Housing (Wind Rating N2,N3,N4,C2,C3)
AS/NZS 4100:1990 Steel Structures Code
AS/NZS 3623-1993 Domestic Metal Framing
AS/NZS 3566.1-2002 Self Drilling Screws

Design Documents:
Permalite Aluminium Roof Sheeting Design Manual

Signed

Date: 02.08.2011
Ross Proud
EC1039

14 VICTORIA STREET, BALLARAT SUITE 1, CHURCHES ARCADE, SUITE 17 109 – 110 MAIN ROAD,
P.O.BOX 2125, BAKERY HILL 3354 16 STEWART STREET, DEVONPORT MOONAH, HOBART
PHONE 03 5327 7477 P.O.BOX 7130 DEVONPORT P.O.BOX 7130 DEVONPORT
PHONE 03 64241611 PHONE 03 6278 3190

PERMALITE® Design Manual 2012 35

Disclaimer, warranties and limitation of liability
Terms and conditions of sale available by contacting the BlueScope Buildings office. BlueScope Buildings is
a wholly owned subsidiary of BlueScope Steel Limited.

Except to the extent to which liability may not lawfully be excluded or limited, BlueScope Steel Limited
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limitation, consequential loss or damage such as loss of profit or anticipated profit, loss of use, damage
to goodwill and loss due to delay) however caused (including, without limitation, breach of contract,
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© Copyright BlueScope Steel Limited 16 August, 2012

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Ph: 1300 850 389 Fax: 1800 850 481 web: www.bluescope.com.au
blueScope, Permalite®, V-Rib®, LT7®, Alspan®, Waveline®, Sahara®, Enduro Green®, Perpetual Green®, Glacier White® and Moon Shadow®
are registered trademarks of BlueScope Steel Limited, ABN 16 000 011 058. Tek® is a registered trademark of ITW Buildex. The Permalite® range of
36 is made by BlueScope Steel Limited trading
products PERMALITE
as BlueScope Design Manual 2012
®Building Solutions. 200 PM 16/8/12