Rothoblaas - Wood screws and connectors Page 185
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STATIC VALUES | BEECH LVL CHARACTERISTIC VALUES EN 1995:2014 SLIDING(3) geometry LVL - LVL A 45° Sg L b Sg B d1 LVL without pre-drilling with pre-drilling hole hole RV,k RV,k d1 eq. d1 L Sg A min Bmin [mm] [mm] [mm] [mm] [mm] [mm] 6 140 55 55 70 7,84 5,41 6 180 75 70 85 10,69 7,38 6 220 95 80 100 13,54 9,35 6 260 115 95 110 16,39 11,32 8 200 85 75 90 16,16 11,16 7 9 [kN] [kN] 8 240 105 90 105 19,96 13,78 8 280 125 105 120 23,76 16,40 8 320 145 120 135 27,56 19,03 steel Rtens,k 45° (4) [kN] 12,73 22,63 SHEAR geometry LVL - LVL Sg A L b Sg d1 LVL without pre-drilling hole with pre-drilling hole d1 eq. d1 L Sg A min RV,k RV,k [mm] [mm] [mm] [mm] [mm] [kN] [kN] 6 140 55 70 6,77 5,78 6 180 75 90 6,77 6,65 6,77 7 9 6 220 95 110 6,77 6 260 115 130 6,77 6,77 8 200 85 100 11,13 10,50 8 240 105 120 11,13 11,13 8 280 125 140 11,13 11,13 8 320 145 160 11,13 11,13 GENERAL PRINCIPLES: • Characteristic values comply with the EN 1995:2014 standard in accordance with ETA-11/0030. • For the calculation process a mass density equal to ρk = 730 kg/m3 has been considered for LVL beach elements. • Design values can be obtained from characteristic values as follows: • Rk kmod Rd = γM Dimensioning and verification of the timber elements must be carried out separately. • The characteristic shear resistance values of connectors are calculated for screws inserted with and without pre-drilling hole. • A suitable pilot hole must be drilled for the insertion of some connectors. For further details please see ETA-11/0030. • The withdrawal, shear and sliding values were calculated considering the centre of gravity of the connector placed in correspondence with the shear plane. The coefficients γM and kmod should be taken according to the current regulations used for the calculation. • For the mechanical resistance values and the geometry of the screws, reference was made to ETA-11/0030. STRUCTURES | VGZ HARDWOOD | 185
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