Rothoblaas Catalogue 2019

TECHNICAL ASPECTS

INSTALLATION MINIMUM DISTANCES FOR SHEAR LOADS (1)

Load angle to the grain α = 0°

grain direction

SCREWS INSERTED WITH PRE-BORED HOLES

SCREWS INSERTED WITHOUT PRE-BORED HOLES

means of connection

9

11

9

11

a a

a a

2

2

a 1 a 2

[mm] [mm] [mm] [mm] [mm] [mm]

45 27

55 108 132

2

2

33

45

55

a

a

a

a

a 3,t a 3,c a 4,t a 4,c

108 132 135 165

1

1

1

1

63 27 27

77 33 33

90 110

45 45

55 55

loaded end -90° < α < 90°

unloaded end 90° < α < 270°

Load angle to the grain α = 90°

α

α

SCREWS INSERTED WITH PRE-BORED HOLES

SCREWS INSERTED WITHOUT PRE-BORED HOLES

a

a

3,t

3,c

9

11 44 44 77 77 77 33

9

11 55 55

a 1 a 2

[mm] [mm] [mm] [mm] [mm] [mm]

36 36 63 63 63 27

45 45

loaded edge 0° < α < 180°

unloaded edge 180° < α < 360°

a 3,t a 3,c a 4,t a 4,c

90 110 90 110 90 110

α

α

a

a

4,c

4,t

45

55

MINIMUM DISTANCES FOR AXIAL STRESSES (2)

SCREWS INSERTED WITH PRE-BORED HOLES

SCREWS INSERTED WITHOUT PRE-BOREDHOLES

SCREWS INSERTED WITH A 90° ANGLE WITH RESPECT TO THE GRAIN PLAN FRONT

9

11 55 55 28

9

11 55 55 28

a 1 a 2

[mm] [mm]

45 45 23

45 45 23

a a a

2,c

2

a 2,LIM (3) [mm]

2,c

a 1,c a 2,c

[mm] [mm]

90 110 90 110

a

a

a

a

27

33

36

44

1,c

1

1,c

1

(1) Minimum distances are in accordance with EN 1995:2014 as per ETA-11/0030 considering a volume mass of the wooden elements equal to ρ k ≤ 420 kg/m 3 . In the case of steel-wood joints, the minimum spacings (a 1 , a 2 ) can be multiplied by a coefficient of 0,7. (2) The minimum distances for connectors stressed axially are independent of the insertion angle of the connector and the angle of the force with respect to the grain, in accordance with ETA-11/0030. (3) The axial distance a 2 can be reduced down to 2.5 · d 1 if for each connector a ”joint surface“ a 1 · a 2 = 25 · d 1 2 is maintained.

NOTES:

COMPLEMENTARY PRODUCTS | VGS | 187