Rothoblaas Catalogue 2019

TECHNICAL ASPECTS

GEOMETRY AND MECHANICAL CHARACTERISTICS

d

k

H B S X X

HBS SCREW Nominal diameter Head diameter Core diameter Shank diameter Head thickness Predrill diameter

d 1 d k d 2

8

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

90 °

14,5

t

5,4 5,8 4,5 5,0

1

d s

d

s

t 1

d v

M y,k

Characteristic value for the yield moment

[Nmm]

20057,5

L

[N/mm 2 ]

f ax,k

Characteristic value of extraction strength

11,7

[N/mm 2 ]

f head,k

Characteristic head penetration strength

10,5

b

f tens,k

Characteristic tensile strength

[kN]

20,1

d

2

d

1

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

a a

a 1 a 2

a a

[mm] [mm]

40 24 96 56 24 24

96 40

2

2

2

2

a 3,t [mm] a 3,c [mm] a 4,t [mm] a 4,c [mm]

120

a

a

a

a

80 40 40

1

1

1

1

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

a 1 a 2

[mm] [mm]

32 32 56 56 56 24

40 40 80 80 80 40

loaded edge 0° < α < 180°

unloaded edge 180° < α < 360°

a 3,t [mm] a 3,c [mm] a 4,t [mm] a 4,c [mm]

α

α

a

a

4,c

4,t

182 | HBS | COMPLEMENTARY PRODUCTS