Rothoblaas - Plates and Connectors Page 559
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STATIC VALUES steel-to-timber shear(1) screw geometry SPLATE Fv SPLATE withdrawal Fv Fax L Fv b Fv d1 d1 L b Rv,k Rax,k (2) [mm] [mm] [mm] [kN] [kN] SPLATE 80 8 55 5,0 mm 6,0 mm 8,0 mm 10,0 mm 3,74 3,99 4,27 4,90 4,90 5,15 75 4,31 4,31 4,58 4,84 5,37 5,37 7,02 120 95 4,78 4,78 5,05 5,31 5,84 5,84 8,89 140 110 5,12 5,12 5,38 5,65 6,19 6,19 10,30 160 130 5,12 5,12 5,50 5,89 6,66 6,66 12,17 4,0 mm 5,0 mm 6,0 mm 8,0 mm 10,0 mm 12,0 mm 100 75 5,52 5,47 5,81 6,57 7,41 7,41 8,78 120 95 6,47 6,47 6,78 7,38 8,00 8,00 11,12 140 110 6,91 6,91 7,21 7,83 8,44 8,44 12,87 160 130 7,38 7,38 7,71 8,37 9,02 9,02 15,21 180 150 17,55 SPLATE 12 4,0 mm 3,79 100 SPLATE 10 3,0 mm 7,38 7,38 7,83 8,72 9,61 9,61 5,0 mm 6,0 mm 8,0 mm 10,0 mm 12,0 mm 15,0 mm 120 90 7,52 7,45 8,08 8,80 9,60 9,60 12,64 140 110 8,42 8,42 9,04 9,67 10,30 10,30 15,44 160 120 8,77 8,77 9,40 10,02 10,65 10,65 16,85 180 140 9,11 9,11 9,86 10,61 11,36 11,36 19,66 200 160 9,11 9,11 10,09 11,08 12,06 12,06 22,46 GENERAL PRINCIPLES: NOTES: • Characteristic values are consistent with EN 1995-1-1 and in accordance with ETA-11/0030. (1) The characteristic shear-strength value for HBS PLATE screws has been evaluated assuming a plate thickness = S PLATE , and considering the thin (S PLATE ≤ 0,5 d1), intermediate (0,5 d1 < S PLATE < d1) or thick (S PLATE ≥ d1) plate case scenario. (2) The axial thread withdrawal resistance was calculated considering a 90° angle between the grain and the connector and for a fixing length of b. • The design values are obtained from the characteristic values as follows: Rd = Rk kmod γM The coefficients γ M and kmod should be taken according to the current regulations used for the calculation. In the case of steel-wood connections, generally the steel tensile strength is binding with respect to head separation or pull-through. • For the mechanical resistance values and the geometry of the screws, reference was made to ETA-11/0030. • For the calculation process a timber density ρk = 350 kg/m3 has been considered. • The values in the table are also valid for application on CLT (minimum panel thickness tCLT,min = 10·d1). • The values in the table are independent of the load-to-grain angle. • Dimensioning and verification of timber elements and steel plates must be carried out separately. • The shear characteristic resistances are calculated for screws inserted without pre-drilling holes. In the case of screws inserted with pre-drilling holes, greater resistance values can be obtained. • For different calculation configurations, the MyProject software is available (www.rothoblaas.com). • For further details please see the "Screws and connectors for timber" catalogue available on www.rothoblaas.com. SCREWS AND NAILS FOR PLATES | HBS PLATE | 559
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