Rothoblaas - Wood screws and connectors Page 153
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MINIMUM DISTANCES FOR SHEAR AND AXIAL LOADS | CLT SCREWS INSERTED WITHOUT PRE-DRILLING HOLE SCREWS INSERTED WITHOUT PRE-DRILLING HOLE lateral face(1) narrow face(2) d1 [mm] a1 [mm] 7 9 11 a2 [mm] a3,t [mm] 6∙d 42 a3,c [mm] 6∙d 42 a4,t [mm] 6∙d 42 a4,c [mm] 2.5∙d 18 7 9 11 4∙d 28 36 44 2.5∙d 18 23 28 10∙d 70 90 110 4∙d 28 36 44 54 54 66 12∙d 84 108 132 66 7∙d 49 63 77 54 23 66 6∙d 42 54 66 28 3∙d 21 27 33 d = nominal screw diameter a4,c a4,t α F F α α F F α a3,c a3,t a3,t a2 a2 a2 a1 a1 a4,c F a3,c a3,c a4,c a4,c a4,t tCLT F tCLT NOTES: The minimum distances are compliant with ETA-11/0030 and are to be considered valid unless otherwise specified in the technical documents for the CLT panels. (1) Minimum CLT thickness t min = 10∙d (2) Minimum CLT thickness t min = 10∙d and minimum screw pull-through depth tpen = 10∙d STRUCTURES | VGZ | 153
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