Due to the increasing use of hardwood for load-bearing components, we have looked at the effects on our SHERPA connector system and in particular on the special screws.

For example, screw-in tests were carried out at different screw-in angles in relation to the grain direction of the wood. This was followed by corresponding load capacity tests.

Based on this, the practical screw lengths and the associated load carrying capacity values are now available for the dimensioning of connections of various hardwoods and materials made from them.

M	GL 24 H	Hardwood
	6.5 x 65 mm	6.5 x 65 mm	6.5 x 85 mm
M 15	14,9	34,3	48,0
M 20	23,6	54,3	76,0
M 25	27,8	63,9	89,5
M 30	32,0	73,6	103,0
M 40	40,1	92,2	129,1

ηs ... Factor per screw length
	6.5 x 85 mm	Softwood	1,40
	6.5 x 105 mm	Softwood	1,80

L	GL 24 H	Hardwood
	8 x 100 mm	8 x 100 mm	8 x 120 mm
L 30	36,1	83,0	103,8
L 40	44,2	101,7	127,1
L 50	52,0	119,6	149,5
L 60	67,4	155,0	193,8
L 80	82,4	189,5	236,9
L 100	97,1	223,3	279,2
L 120	111,6	256,7	320,9

ηs ... Factor per screw length
	8 x 120 mm	Softwood	1,25
	8 x 140 mm	Softwood	1,49

XL	GL 24 H	Hardwood 8 X 120 mm
	8 x 160 mm	SHERPA	SCHMID
XL 55	65,5	107,3	116,6
XL 70	80,0	131,1	142,4
XL 80	94,3	154,5	167,9
XL 100	108,4	177,6	193,0
XL 120	135,9	222,6	242,0
XL 140	149,4	244,7	266,0
XL 170	176,0	288,3	313,4
XL 190	202,2	331,2	360,0
XL 220	228,0	373,5	406,0
XL 250	253,5	415,3	451,4

XXL	GL 24 H	Hardwood 8 X 120 mm
	8 x 160 mm	SHERPA	SCHMID
XXL 100	94,3	154,5	167,9
XXL 120	122,2	200,2	217,6
XXL 140	149,4	244,7	266,0
XXL 170	176,0	288,3	313,4
XXL 190	202,2	331,2	360,0
XXL 220	228,0	373,5	406,0
XXL 250	253,5	415,3	451,4
XXL 280	278,7	456,5	496,2
XXL 300	303,7	497,5	540,8

ηs ... Factor per screw length
	8 x 120 mm	Softwood	0,71
	8 x 140 mm	Softwood	0,86
	8 x 180 mm	Softwood	1,13
	8 x 200 mm	Softwood	1,25

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