Rothoblaas - Wood screws and connectors Page 216
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POSSIBLE CONFIGURATIONS A A A 90° B A 60° 60° 60° A 90° A A 90° B A 60° A A B B RIGID ROOF INSULATION σ(10%) ≥ 50 kPa (EN826) SOFT ROOF INSULATION σ(10%) < 50 kPa (EN826) B FACADE INSULATION NOTE: The number and placement of the fastenings depends on the geometry of the surfaces, the type of insulation and the loads acting on them. MINIMUM DISTANCES FOR AXIAL STRESSES (1) a2,CG 1 a a2 a2,CG a1,CG a1,CG SCREWS INSERTED WITH AND WITHOUT PRE-DRILLING HOLE d1 [mm] a1 [mm] 5∙d 35 45 a2 [mm] 5∙d 35 45 a1,CG [mm] 10∙d 70 90 a2,CG [mm] 4∙d 28 36 7 d = nominal screw diameter NOTES: (1) 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. 216 | DGZ | STRUCTURES 9
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