Rothoblaas - Plates and Connectors Page 554
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MINIMUM DISTANCES FOR SHEAR LOADS | STEEL-TO-TIMBER JOINTS(1) SCREWS INSERTED WITHOUT PRE-DRILLING HOLE Load-to-grain angle α = 0° d1 a1 a2 a3,t a3,c a4,t a4,c [mm] [mm] [mm] [mm] [mm] [mm] [mm] 5 42 18 75 50 25 25 Load-to-grain angle α = 90° 7 59 25 105 70 35 35 a2 a2 5 18 18 50 50 50 25 α F α α a3,t F a4,c a4,t F α F a1 a 1 7 25 25 70 70 70 35 a3,c MINIMUM DISTANCES FOR SHEAR AND AXIAL LOADS | CLT(2) SCREWS INSERTED WITHOUT PRE-DRILLING HOLE | LATERAL FACE(3) d1 a1 a2 a3,t a3,c a4,t a4,c [mm] [mm] [mm] [mm] [mm] [mm] [mm] 5 20 13 30 30 30 13 7 28 18 42 42 42 18 a1 F α α α F a3,t a3,c F F α a2 a4,t tCLT a4,c NOTES: (1) The minimum distances are compliant with EN 1995-1-1, according to ETA11/0030, considering a wood characteristic density of ρ k ≤ 420 kg/m3 and calculation diameter of d = nominal screw diameter. • In the case of timber-to-timber joints, the minimum spacing (a1 , a2) can be multiplied by a coefficient of 1,5. 554 | LBS | SCREWS AND NAILS FOR PLATES (2) 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. • The minimum distances are independent of the load-to-grain angle. (3) Minimum CLT thickness tCLT,min = 10·d1 .
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