ALUMIDI

Concealed beam hanger with and without holes

Aluminum alloy tridimensional perforated plate

CERTIFIED
Available with and without holes.
The 2200 mm model is also certified

STEELALUMINUM
FIELD OF USE EN AW-6005A high strength aluminum alloy,
obtained by extrusion thus weld-free
Timber-to-Timber shear
connections, both perpendicular
and inclined to the vertical plane
TIMBER AND CONCRETE
solid timber Optimal hole spacing both for timber
(nails or screws) and concrete
glulam (Glued Laminated
Timber) (chemical or screwed anchor)
XLAM (Cross Laminated Timber)
LVL (Laminated Veneer Lumber) SPARES MANAGEMENT
wood-based panels Versions without holes available in 2200 mm long
pieces with notches every 40 mm, to be cut onsite
according to the worksite needs

ALUMIDI - 01
INVISIBLE
The hidden connection provides a
satisfying appearance to the joint and
fulfills the fire safety requirements.
A countersink where the first hole is
located, facilitates the introduction of
the secondary beam from the top

TIMBER - CONCRETE
For applications on reinforced concrete
or other uneven surfaces the self-drilling
dowels allow a greater installation
tolerance when fixing the timber
element. Values are certified, tested and
consolidated

CERTIFIED SAFETY
AluMIDI bracket has been the subject
of many research works, studies and
international publications, both from
theoretical (calculation models) and
experimental point of view

ALUMIDI - 02
CODES AND DIMENSIONS

ALUMIDI WITHOUT HOLES

code type H [mm] pcs/box
ALUMIDI80 without holes 80 25
ALUMIDI120 without holes 120 25
ALUMIDI160 without holes 160 25
H ALUMIDI200 without holes 200 15
ALUMIDI240 without holes 240 15
ALUMIDI2200 without holes 2200 1

ALUMIDI WITH HOLES

code type H [mm] pcs/box
ALUMIDI120L with holes 120 25
ALUMIDI160L with holes 160 25
ALUMIDI200L with holes 200 15
H ALUMIDI240L with holes 240 15
ALUMIDI280L with holes 280 15
ALUMIDI320L with holes 320 8
ALUMIDI360L with holes 360 8

TEMPLATE
code type pcs/box
ATALUMIDI template for AluMIDI with STA Ø12 1

EXTERNAL LOADS MATERIAL AND DURABILITY

FV ALUMIDI: EN AW-6005° aluminum alloy.

To be used in Service class 1 and 2 (EN 1995:2008).

FUP
FIELD OF USE
FV
Timber to timber joints
Timber to concrete joints
Steel to timber joints

FUP

ADDITIONAL PRODUCTS - FIXINGS

type description d [mm] support p.

LBA anker nail 4 364
LBS screw for plates 5 364
WS self-drilling dowel 7 368
STA smooth dowel 12 50
SKR screw anchor 10 328
VINYLPRO chemical anchor M8 346
EPOPLUS chemical anchor M8 354

It is recommended to perform the assembly of the system by using the CHAIN MORTISER described in chapter 9 of the catalogue
“Tools for wooden construction (pag. 147)

ALUMIDI - 03
 GEOMETRY
ALUMIDI ALUMIDI
without holes with holes
LA LB AluMIDI AluMIDI
14 52 14 LB 86 23,4 without holes with hole
Thickness s [mm] 6 6
24 20
Flange width LA [mm] 80 80
40
Ø3 Web length LB [mm] 109,4 109,4
Small flange-holes Ø1 [mm] 5,0 5,0
H
Ø2 Large flange-holes Ø2 [mm] 9,0 9,0
40
Ø1 Web holes (dowels) Ø3 [mm] - 13,0

20
19 42 19
LA s LA s

s s

INSTALLATION
MINIMUM DISTANCES
a3,t
a4,c a4,t self-drilling dowel smooth dowel
as SECONDARY BEAM - TIMBER
WS Ø7 STA Ø12
Dowel - Dowel a2 [mm] ≥3d ≥ 21 ≥ 36
a2 Dowel - Beam extrados a4,t [mm] ≥4d ≥ 28 ≥ 48
Dowel - Beam intrados a4,c [mm] ≥3d ≥ 21 ≥ 36
as a4,c Dowel – Beam end a3,t [mm] ≥ {7 d; 80} ≥ 80 ≥ 80
Dowel – Bracket edge as [mm] ≥ 1,2 do (1) ≥ 10 ≥ 16
(1) hole diameter

hmin a3,t
anker nail screw
a4,t MAIN BEAM - TIMBER
as LBA Ø4 LBS Ø5
First connector – Beam extrados a4,c [mm] ≥5d ≥ 20 ≥ 25
a2

Tinst chemical anchor screw anchor

MAIN BEAM - CONCRETE
as a4,c VINYLPRO Ø8 SKR Ø10
Minimum support thickness hmin [mm] hef + 30 mm ≥ 100 110
hef
Concrete hole diameter d0 [mm] 10 8
Tightening torque Tinst [Nm] 10 25
hef = effective anchoring depth in concrete

ASSEMBLY

ALUMIDI without holes

4a 5a 6a 7a

ALUMIDI with holes

2

3 4b 5b 6b 7b

ALUMIDI - 04
STATIC VALUES  TIMBERTOTIMBER JOINT  RIGHT ANGLE

TOTAL NAILING
bNT FV

hNT H

FIXING THROUGH NAILS FIXING THROUGH SCREWS

AluMIDI without holes SECONDARY BEAM MAIN BEAM CHARACTERISTIC ADMISSABLE MAIN BEAM CHARACTERISTIC
VALUES VALUES VALUES
AluMIDI dowels WS nails LBA EN 1995:2008 DIN 1052:1988 screws LBS EN 1995:2008
H bNT hNT Ø7 (1) Ø4 x 60 RV,k Vadm Ø5 x 60 RV,k
[mm] [mm] [mm] [pcs - Ø x L] [pcs] [kN] [kg] [pcs] [kN]
80 120 120 3 - Ø7 x 113 14 9,1 540 14 11,6
120 120 160 4 - Ø7 x 113 22 16,6 1070 22 21,5
160 120 200 5 - Ø7 x 113 30 25,7 1530 30 32,7
200 120 240 7 - Ø7 x 113 38 36,7 2030 38 45,9
240 120 280 9 - Ø7 x 113 46 50,0 2720 46 62,4
280 * 140 320 10 - Ø7 x 133 54 64,3 2890 54 78,1
320 * 140 360 11 - Ø7 x 133 62 75,7 3180 62 87,7
360 * 160 400 12 - Ø7 x 153 70 93,2 3470 70 105,8
400 * 160 440 13 - Ø7 x 153 78 106,7 3867 78 115,8
* dimension obtainable from ALUMIDI2200

FIXING THROUGH NAILS FIXING THROUGH SCREWS

AluMIDI with holes SECONDARY BEAM MAIN BEAM CHARACTERISTIC ADMISSABLE MAIN BEAM CHARACTERISTIC
VALUES VALUES VALUES
AluMIDI dowels STA nails LBA EN 1995:2008 DIN 1052:1988 screws LBS EN 1995:2008
H bNT hNT Ø12 (2) Ø4 x 60 RV,k Vadm Ø5 x 60 RV,k
[mm] [mm] [mm] [pcs - Ø x L] [pcs] [kN] [kg] [pcs] [kN]
120 120 160 3 - Ø12 x 120 22 23,1 1070 22 25,6
160 120 200 4 - Ø12 x 120 30 34,6 1820 30 40,5
200 120 240 5 - Ø12 x 120 38 46,6 2320 38 54,9
240 120 280 6 - Ø12 x 120 46 59,8 3010 46 68,2
280 140 320 7 - Ø12 x 140 54 77,2 3390 54 86,4
320 140 360 8 - Ø12 x 140 62 93,2 3580 62 100,9
360 160 400 9 - Ø12 x 160 70 112,0 3760 70 123,9
400 * 160 440 10 - Ø12 x 160 78 127,0 4190 78 139,8
* dimension obtainable from ALUMIDI2200

NOTES – TIMBER TO TIMBER

(1) Self-drilling dowels WS Ø7 (f = 550 N/mm2).

u,k
(2) Smooth dowels STA Ø12 (f = 360 N/mm2).
u,k
(3) Partial nailing should be realized alternating the holes (see p. 26).

Partial nailing is necessary for joist-column connections in order to observe

minimum fastener spacings; it can be applied also for joist-joist connections.
(4) Strength values listed in the table have been evaluated for an angle

β = 30% (16,7°) of the secondary joist to the vertical and by considering a

precut AluMIDI hidden bracket.
To optimize timber element dimensions and joint strength it is possible to cut
the AluMIDI bracket at an angle starting from the AluMIDI2200 model.

ALUMIDI - 05
PARTIAL NAILING (3)
bNT FV

hNT H

FIXING THROUGH NAILS FIXING THROUGH SCREWS

AluMIDI without holes SECONDARY BEAM MAIN BEAM CHARACTERISTIC ADMISSABLE MAIN BEAM CHARACTERISTIC
VALUES VALUES VALUES
AluMIDI dowels WS nails LBA EN 1995:2008 DIN 1052:1988 screws LBS EN 1995:2008
H bNT hNT Ø7 (1) Ø4 x 60 RV,k Vadm Ø5 x 60 RV,k
[mm] [mm] [mm] [pcs - Ø x L] [pcs] [kN] [kg] [pcs] [kN]
80 120 120 3 - Ø7 x 113 10 7,4 393 10 9,4
120 120 160 4 - Ø7 x 113 14 14,6 853 14 15,6
160 120 200 5 - Ø7 x 113 18 20,6 1143 18 24,9
200 120 240 7 - Ø7 x 113 22 27,2 1433 22 34,7
240 120 280 9 - Ø7 x 113 26 34,4 1713 26 44,4
280 * 140 320 9 - Ø7 x 133 30 44,2 1833 30 54,7
320 * 140 360 11 - Ø7 x 133 34 54,6 1963 34 64,6
360 * 160 400 11 - Ø7 x 153 38 63,5 2143 38 74,8
400 * 160 440 13 - Ø7 x 153 42 74,4 2365 42 84,0
* dimension obtainable from ALUMIDI2200

FIXING THROUGH NAILS FIXING THROUGH SCREWS

AluMIDI with holes SECONDARY BEAM MAIN BEAM CHARACTERISTIC ADMISSABLE MAIN BEAM CHARACTERISTIC
VALUES VALUES VALUES
AluMIDI dowels STA nails LBA EN 1995:2008 DIN 1052:1988 screws LBS EN 1995:2008
H bNT hNT Ø12 (2) Ø4 x 60 RV,k Vadm Ø5 x 60 RV,k
[mm] [mm] [mm] [pcs - Ø x L] [pcs] [kN] [kg] [pcs] [kN]
120 120 160 3 - Ø12 x 120 14 18,1 853 14 21,4
160 120 200 4 - Ø12 x 120 18 26,2 1143 18 30,8
200 120 240 5 - Ø12 x 120 22 34,6 1433 22 39,5
240 120 280 6 - Ø12 x 120 26 43,7 1713 26 48,2
280 140 320 7 - Ø12 x 140 30 53,5 1823 30 63,0
320 140 360 8 - Ø12 x 140 34 63,7 1963 34 72,7
360 160 400 9 - Ø12 x 160 38 79,4 2143 38 82,3
400* 160 440 10 - Ø12 x 160 42 88,6 2365 42 91,7
* dimension obtainable from ALUMIDI2200

All Strength values of the connection system are valid for the calculation hypotheses listed in the table.
For different configurations the free software myProject is available (www.rothoblaas.com)

The analysis of various configurations is possible by varying number and type of fasteners, inclination,
dimensions and material of the structural elements to maximize the mechanical strength.
• Possibility of using two different methods of calculation (according to ETA 09/0361 and experimental model
• Wide and diversified variety of ALUMINI, MIDI e MAXI brackets able to satisfy different static requirements

my
calculation software by rothoblaas

ALUMIDI - 06
STATIC VALUES  TIMBERTOTIMBER JOINT  INCLINED4

TOTAL NAILING
bNT
FV

hNT H

β = 30%

FIXING THROUGH NAILS FIXING THROUGH SCREWS

AluMIDI without holes SECONDARY BEAM MAIN BEAM CHARACTERISTIC ADMISSABLE MAIN BEAM CHARACTERISTIC
VALUES VALUES VALUES
AluMIDI dowels WS nails LBA EN 1995:2008 DIN 1052:1988 screws LBS EN 1995:2008
H bNT hNT Ø7 (1) Ø4 x 60 RV,k Vadm Ø5 x 60 RV,k
[mm] [mm] [mm] [pcs - Ø x L] [pcs] [kN] [kg] [pcs] [kN]
80 120 140 3 - Ø7 x 113 14 9,1 540 14 11,6
120 120 180 4 - Ø7 x 113 22 16,6 1070 22 21,5
160 120 220 5 - Ø7 x 113 30 25,7 1530 30 32,7
200 120 260 7 - Ø7 x 113 38 36,7 2030 38 45,9
240 120 300 9 - Ø7 x 113 46 50,0 2720 46 62,4
280 * 140 340 10 - Ø7 x 133 54 64,3 2890 54 78,1
320 * 140 380 11 - Ø7 x 133 62 75,7 3180 62 87,7
360 * 160 420 12 - Ø7 x 153 70 93,2 3470 70 105,8
400 * 160 460 13 - Ø7 x 153 78 106,7 3867 78 115,8
* size obtainable from ALUMIDI2200

FIXING THROUGH NAILS FIXING THROUGH SCREWS

AluMIDI with holes SECONDARY BEAM MAIN BEAM CHARACTERISTIC ADMISSABLE MAIN BEAM CHARACTERISTIC
VALUES VALUES VALUES
AluMIDI dowels STA nails LBA EN 1995:2008 DIN 1052:1988 screws LBS EN 1995:2008
H bNT hNT Ø12 (2) Ø4 x 60 RV,k Vadm Ø5 x 60 RV,k
[mm] [mm] [mm] [pcs - Ø x L] [pcs] [kN] [kg] [pcs] [kN]
120 120 160 3 - Ø12 x 120 22 23,1 1070 22 25,6
160 120 200 4 - Ø12 x 120 30 34,6 1820 30 40,5
200 120 240 5 - Ø12 x 120 38 46,6 2320 38 54,9
240 120 280 6 - Ø12 x 120 46 59,8 3010 46 69,2
280 140 320 7 - Ø12 x 140 54 77,2 3390 54 89,0
320 140 360 8 - Ø12 x 140 62 93,2 3580 62 104,8
360 160 400 9 - Ø12 x 160 70 114,2 3760 70 126,1
400 * 160 440 10 - Ø12 x 160 78 127,0 4190 78 143,6
* dimension obtainable from ALUMIDI2200

GENERAL PRINCIPLES – TIMBER TO TIMBER

• Characteristic values are consistent with EN 1995:2008, in accordance with • Admissible values are obtained according to DIN 1052:1988.
ETA-09/0361 and evaluated with rothoblaas experimental method. • For the calculation process a timber density ρk = 380 kg/m3 has been considereded.
• Design values can be obtained from characteristic values as follows: • In some cases the connection shear strength RV,k is notably large and may be
higher than the secondary joist strength. Particular attention should be paid to the
shear check of the reduced timber crossection in correspondence with the bracket
location.
Coefficients γm and kmod smust be taken according to the current
Standard adopted for the design.

ALUMIDI - 07
STATIC VALUES  TIMBERTOCONCRETE JOINT RIGHT ANGLE

SCREW ANCHOR (1)

bNT
FV

hNT H

AluMIDI without holes SECONDARY BEAM MAIN BEAM CHARACTERISTIC VALUES ADMISSABLE VALUES

AluMIDI dowels WS anchor SKR EN 1995:2008 DIN 1052:1988

H bNT hNT Ø7 (2) Ø10 x 80 (4) RV,k Vadm
[mm] [mm] [mm] [pcs - Ø x L] [pcs] [kN] [kg]
80 120 120 2 - Ø7 x 113 2 6,9 340
120 120 160 3 - Ø7 x 113 3 11,4 570
160 120 200 4 - Ø7 x 113 4 16,0 800
200 120 240 5 - Ø7 x 113 5 20,6 1030
240 120 280 6 - Ø7 x 113 6 25,2 1260
280 * 140 320 7 - Ø7 x 133 7 29,7 1490
320 * 140 360 8 - Ø7 x 133 8 34,3 1720
360 * 160 400 9 - Ø7 x 153 9 38,9 1950
400 * 160 440 10 - Ø7 x 153 10 43,2 2167
* dimension obtainable from ALUMIDI2200

AluMIDI with holes SECONDARY BEAM MAIN BEAM CHARACTERISTIC VALUES ADMISSABLE VALUES

AluMIDI dowels STA anchor SKR EN 1995:2008 DIN 1052:1988

H bNT hNT Ø12 (3) Ø10 x 80 (4) RV,k Vadm
[mm] [mm] [mm] [pcs - Ø x L] [pcs] [kN] [kg]
120 120 160 3 - Ø12 x 120 3 12,6 630
160 120 200 4 - Ø12 x 120 4 17,7 880
200 120 240 5 - Ø12 x 120 5 22,8 1140
240 120 280 6 - Ø12 x 120 6 27,8 1390
280 140 320 7 - Ø12 x 140 7 32,9 1640
320 140 360 8 - Ø12 x 140 8 37,9 1900
360 160 400 9 - Ø12 x 160 9 43,0 2150
400 * 160 440 10 - Ø12 x 160 10 47,8 2389
* dimension obtainable from ALUMIDI2200

ALUMIDI - 08
STATIC VALUES  TIMBERTOCONCRETE JOINT RIGHT ANGLE

CHEMICAL ANCHOR (1)

bNT
FV

hNT H

AluMIDI without holes SECONDARY BEAM MAIN BEAM CHARACTERISTIC VALUES ADMISSABLE VALUES

AluMIDI dowels WS anchor VINYLPRO EN 1995:2008 DIN 1052:1988

H bNT hNT Ø7 (2) Ø8 x 110 (5) RV,k Vadm
[mm] [mm] [mm] [pcs - Ø x L] [pcs] [kN] [kg]
80 120 120 3 - Ø7 x 113 4 11,9 606
120 120 160 4 - Ø7 x 113 4 19,0 948
160 120 200 5 - Ø7 x 113 6 30,3 1516
200 120 240 7 - Ø7 x 113 7 37,8 1894
240 120 280 9 - Ø7 x 113 8 46,8 2343
280 * 140 320 10 - Ø7 x 133 9 54,6 2724
320 * 140 360 11 - Ø7 x 133 11 58,5 2926
360 * 160 400 12 - Ø7 x 153 12 68,1 3405
400 * 160 440 13 - Ø7 x 153 14 78,1 3906
* dimension obtainable from ALUMIDI2200

AluMIDI with holes SECONDARY BEAM MAIN BEAM CHARACTERISTIC VALUES ADMISSABLE VALUES

AluMIDI dowels STA anchor VINYLPRO EN 1995:2008 DIN 1052:1988

H bNT hNT Ø12 (3) Ø8 x 110 (5) RV,k Vadm
[mm] [mm] [mm] [pcs - Ø x L] [pcs] [kN] [kg]
120 120 160 3 - Ø12 x 120 4 19,0 948
160 120 200 4 - Ø12 x 120 6 30,3 1516
200 120 240 5 - Ø12 x 120 7 37,8 1894
240 120 280 6 - Ø12 x 120 8 46,8 2343
280 140 320 7 - Ø12 x 140 9 54,6 2724
320 140 360 8 - Ø12 x 140 11 58,5 2926
360 160 400 9 - Ø12 x 160 12 68,1 3405
400 * 160 440 10 - Ø12 x 160 14 78,1 3906
* dimension obtainable from ALUMIDI2200

GENERAL PRINCIPLES – TIMBER TO CONCRETE NOTES – TIMBER TO CONCRETE

(1) The anchor disposition on concrete is obtained by placing the fasteners

• Characteristic values consistent with EN 1995:2008 and in accordance with
ETA-09/0361. alternately according to the reference picture, depending on the type of
• Design values can be obtained from characteristic values as follows: anchor selected (see p. 26).
(2) Self drilling dowel WS Ø7 (f = 550 N/mm2).
u,k
(3) Smooth dowel STA Ø12 (f = 360 N/mm2).
u,k
(4) Screw anchor SKR according to testing by Politecnico di Milano

Coefficient γmc shall be taken as 1.50. (Test Certification n. 2006/5205/1).

(5) Chemical anchor VINYLPRO with steel threaded rods (type INA) of minimum
• Admissible values are obtained according to DIN 1052:1988.
• For the calculation process a timber density ρk = 380 kg/m3 and a concrete strength grade equal to 5.8.with hef = 90 mm.
grade C25/30 have been considered.
• Dimensioning and verification of the timber elements must be carried out
separately.
• Strength values of the connection system are valid under the calculation
hypotheses listed in the table.

ALUMIDI - 09
LABORATORY TESTING

EXPERIMENTAL INVESTIGATION

A comprehensive experimental campaign aimed at defining the real behaviour of the ALU brackets was carried out in collaboration the University
of Trento. A numerical model has then been proposed and validated on the experimental results (rothoblaas experimental method).

RESEARCH AND DEVELOPMENT

Experimental investigation – Laboratorio Prove Materiali e Strutture (LPMS - Faculty of Engineering, Trento)

Tests on specimens with

reduced dimensions
(timber-to-timber and
timber-to-concrete)

Tests on full-scale
specimens (main-
secondary joint)

NUMERICAL MODELING

Investigation on the plastic deformation history of dowels and ALU brackets through finite element analysis.

Solid model of Alu bracket on concrete Mises stress history on dowels and Comparison between undeformed
ALU bracket and deformed shape at the end of
the test

ALUMIDI - 10
 BEAMS WALLS PERFORATED PLATES OUTDOOR ANCHORS

JOINTS WITH ALU BRACKETS

PRODUCT RANGE

without holes with holes without holes with holes without holes

AluMINI AluMIDI AluMAXI

APPLICATIONS

GEOMETRY

β α

PERPENDICULAR JOINT INCLINED JOINTS SINGLE BRACKET DOUBLE BRACKET

MATERIAL

TIMBER / TIMBER TIMBER / CONCRETE STEEL / TIMBER

INSTALLATION – Minimum dimensions for timber elements in hidden bracket joints

self-drilling dowel WS smooth dowel STA

aL LA aL
AluMINI AluMIDI AluMAXI AluMINI AluMIDI AluMAXI
wing width LA [mm] 45 80 130 45 80 130
bracket - timber
aL [mm] ≥ 10 ≥ 10 ≥ 15 ≥ 10 ≥ 10 ≥ 15
edge
joist width (1) bJ [mm] ≥ 80 ≥ 100 (2) ≥ 160 ≥ 70 ≥ 100 (2) ≥ 150
Ø [mm] 7 8 12 16
bJ dowel length to be evaluated based on aesthetic
L [mm]
requirements and fire resistance

(1) Recommended minimum width of the secondary beam to accommodate the grooving while ensuring that the connection remains completely hidden
(2) Lateral distance to the edge of the timber element < 10 mm, thus particolar care is suggested when realizing the grooving

ALUMIDI - 11
BEAMS WALLS PERFORATED PLATES OUTDOOR ANCHORS

INSTALLATION – Fixing types and positioning

AluMINI AluMIDI

APPLICATION TIMBER - TIMBER TIMBER - TIMBER TIMBER - CEMENT

FIXINGS main joist screw HBS+ evo Ø5 nail LBA Ø4 / screw LBS Ø5 SKR Ø10 VINYLPRO M8
FIXINGS secondary joist WS Ø7 / STA Ø8 self-drilling dowel WS Ø7 / smooth dowel STA Ø12
NAILING / DOWELLING total partial total dowelling dowelling
main joist nailing nailing nailing SKR VINYLPRO

AluMAXI

APPLICATION TIMBER - TIMBER TIMBER - CONCRETE

FIXINGS main joists nail LBA Ø6 VINYLPRO M16

FIXINGS secondary joists self-drilling dowel WS Ø7 / liscio STA Ø16

NAILING /DOWELLING partial total dowelling

main joist nailing nailing VINYLPRO

FIRE RESISTANCE - Connections (EN1995-1-2 §6.2.1)

ALU bracket allows the realization of a completely hidden connection system. High fire-rated performance can also be achieved if the
minimum bracket-timber edge distances are observed (eg. with wood taps, available in the catalogue “Tools for wooden constructions”)
and adherence between elements is ensured.

Minimum covering required for protected joints (3)

wood
fire t1 min t2 min afi [mm] t1 taps
resistance [mm] [mm] glulam GL solid wood C t2 afi
R20 20 (4) 10 0 (5) 0 (5)
R30 20 (4) 10 10,5 12 t1 t2 afi
R60 30 30 42 48 perfect
adherence
has to be
(3) Strength check under fire condition must be carried out separately guaranteed
(4) Possible reduction to 10 mm if minimum bracket-timber edge distances for dowel are observed
(5) Unprotected joint: L dowel > 100 mm

ALUMIDI - 12