Rothoblaas - Wood screws and connectors Page 115
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STATIC VALUES CHARACTERISTIC VALUES EN 1995:2014 SHEAR timber-to-timber α = 0°(1) geometry timber-to-timber α = 90°(2) TENSION thin steel-timber plate(3) thick steel-timber plate(4) thread withdrawal(5) head pull-through(6) A L b d1 b(7) A RV,k RV,k RV,k RV,k Rax,k Rhead,k [mm] [mm] [mm] [mm] [kN] [kN] [kN] [kN] [kN] [kN] 50 30 20 2,96 2,23 2,64 3,75 2,78 3,54 60 36 24 3,28 2,68 3,22 4,38 3,34 3,54 3,51 4,56 3,90 3,54 4,70 4,45 3,54 4,98 5,56 3,54 5,25 6,68 3,54 5,53 7,79 3,54 28 3,55 2,87 32 3,78 3,01 100 60 40 3,96 3,32 120 72 48 3,96 3,42 140 84 56 3,96 3,42 3,65 3,93 4,20 4,48 160 96 64 3,96 3,42 4,76 5,81 8,90 3,54 180 108 72 3,96 3,42 5,04 6,09 10,02 3,54 200 120 80 3,96 3,42 5,07 6,37 11,13 3,54 50 30 20 3,48 2,56 3,10 4,65 2,86 5,45 60 36 24 4,18 3,07 3,79 5,30 3,43 5,45 80 48 32 5,01 4,01 4,97 6,56 4,57 5,45 100 60 40 5,78 4,56 5,26 6,84 5,72 5,45 120 72 48 6,05 4,92 5,54 7,13 6,86 5,45 5,83 140 84 56 6,05 5,19 150 90 60 6,05 5,19 160 96 64 6,05 5,19 180 108 72 6,05 5,19 200 120 80 6,05 5,19 220 132 88 6,05 5,19 240 144 96 6,05 5,19 5,97 6,12 6,40 SPLATE = 10 mm 10 42 48 SPLATE = 5 mm 8 70 80 SPLATE = 8 mm L SPLATE = 4 mm d1 7,42 8,00 5,45 7,56 8,57 5,45 7,70 9,14 5,45 7,99 10,29 5,45 8,27 11,43 5,45 6,97 8,56 12,57 5,45 7,26 8,85 13,72 5,45 6,69 260 156 104 6,05 5,19 7,54 9,13 14,86 5,45 280 168 112 6,05 5,19 7,66 9,42 16,00 5,45 300 180 120 6,05 5,19 7,66 9,70 17,15 5,45 NOTES: (1) The characteristic shear resistance values are calculated using an angle α be- tween the strength and the grain of 0°. (2) The characteristic shear resistance values are calculated using an angle α be- tween the strength and the grain of 90°. (3) The shear resistance characteristics are calculated considering the case of (6) The axial resistance to head pull-through was calculated using timber ele- ments. In the case of steel-to-timber connections, generally the steel tensile strength is binding with respect to head separation or pull-through. (7) During calculation, a thread length of b = 0,6 L is used, with the exception of the measures (*). a thin plate (SPLATE ≤ 0,5 d1). (4) The shear resistance characteristics are calculated considering the case of a thick plate (SPLATE ≥ d1). (5) The axial thread withdrawal resistance was calculated considering a 90° angle between the grain and the connector and for a fixing length of b. CARPENTRY | KOP | 115
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