Rothoblaas - Wood screws and connectors Page 161
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CONNECTOR TENSILE STRENGTH CALCULATION (EN 1995:2014 and ETA-11/0030) Rax,α,Rk kmod γm Rtens,k γm2 Rax,Rd = min Rax,α,Rx = nef 11,7 d1 Sg kax ρk 0,8 Rax,90°,Rk = 18,75 kN Rtens,k = 25,40 kN 350 The tensile strength of the connectors calculated here is shown in the table on p.144. The minimum distances for placement of the connectors are found in the table on p.143. Italy - NTC 2018 EN 1995:2014 kmod = 0,9 kmod = 0,9 γM = 1,3 γM = 1,5 γM2 = 1,25 γM2 = 1,25 Rax,90°Rd = 12,98 kN Rax,90°Rd = 11,25 kN Rtens,d = 20,32 kN Rki,d = 20,32 kN Rax,Rd = 12,98 kN Rax,Rd = 11,25 kN MINIMUM NUMBER OF CONNECTORS Ft,90,d/Rax,Rd = 1,48 2 connectors are hypothesized Ft,90,d/Rax,Rd = 1,70 nef,ax = max (20,9;0,9∙2)= 1,87 FASTENER RESISTANCE TO PERPENDICULAR TENSION Rax,Rd = 1,87 ∙ 12,98 = 24,27 kN > 19,18 kN OK Rax,Rd = 1,87 ∙ 11,25 = 21,04 kN > 19,18 kN OK For different calculation configurations, the MyProject software is available (www.rothoblaas.com). EXAMPLE OF JOINTS THAT REQUIRE VERIFICATION OF PERPENDICULAR TENSION AND POSSIBLE REINFORCEMENT ia=0 ia>0 STRUCTURES | VGZ | 161
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