Rothoblaas - Wood screws and connectors Page 145
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STATIC VALUES CHARACTERISTIC VALUES EN 1995:2014 TENSION(1) total thread withdrawal(2) geometry L partial thread withdrawal(2) Sg A Sg A steel tension A d1 timber d1 L b A min [mm] [mm] [mm] 250 240 11 timber steel Rax,k Rtens,k [mm] [kN] [kN] 130 15,28 Rax,k Sg A min [mm] [kN] [mm] 260 33,34 110 300 290 310 40,28 135 155 18,75 350 340 360 47,22 160 180 22,22 400 390 410 54,17 185 205 25,70 450 440 460 61,11 210 230 29,17 500 490 510 68,06 235 255 32,64 550 540 560 75,00 260 280 36,11 600 590 610 81,95 285 305 39,59 38,00 NOTES: (1) The connector design resistance is the lowest between the timber side de- sign resistance (Rax,d) and the steel side resistance (Rtens,d). Rax,d = min Rax,k kmod γM Rtens,k γM2 (2) The axial resistance of the thread to withdrawal was calculated consider- ing a 90° angle between the fibres and the connector and for a effective thread length of b or Sg. For intermediate values of Sg it is possible to linearly interpolate. STRUCTURES | VGZ | 145
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