Rothoblaas - Wood screws and connectors Page 150
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STATIC VALUES CHARACTERISTIC VALUES EN 1995:2014 SHEAR CONNECTION WITH CROSSED CONNECTORS RIGHT-ANGLE JOINT - MAIN BEAM/SECONDARY BEAM d1 L S g HT(1) S g NT (1) BHT,min HHT,min = hNT,min bNT,min [mm] [mm] [mm] [mm] [mm] [mm] [mm] 225( * ) 250 50 75 275( * ) 300 100 125 325( * ) 350 148 160 145 145 145 145 148 160 95 105 115 125 130 140 245 245 245 245 250 265 11 375( * ) 400 450 500 550 600 ( * ) VGS 173 185 210 235 260 285 173 185 210 235 260 285 150 160 175 195 210 230 285 300 335 370 405 445 no. pairs R1V,k (2) R2V,k(2) m(3) [mm] [kN] [kN] withdrawal(4) instability 9,8 29,2 105 1 160 2 18,3 54,4 215 3 26,5 78,4 105 1 14,7 29,2 160 2 27,5 54,4 215 3 39,8 78,4 105 1 19,6 29,2 160 2 36,7 54,4 215 3 53,0 78,4 105 1 24,6 29,2 160 2 45,8 54,4 215 3 66,3 78,4 105 1 29,0 29,2 160 2 54,1 54,4 215 3 78,2 78,4 105 1 31,4 29,2 160 2 58,6 54,4 215 3 84,9 78,4 105 1 33,9 29,2 160 2 63,2 54,4 215 3 91,5 78,4 105 1 36,3 29,2 160 2 67,8 54,4 215 3 98,1 78,4 105 1 41,3 29,2 160 2 77,0 54,4 215 3 111,4 78,4 105 1 46,2 29,2 160 2 86,1 54,4 215 3 124,6 78,4 105 1 51,1 29,2 160 2 95,3 54,4 215 3 137,9 78,4 105 1 53,7 29,2 160 2 100,3 54,4 215 3 145,1 78,4 118 118 118 118 120 129 137 146 164 182 199 217 connectors, see page 186. NOTES: (1) The values given are calculated considering a distance a 1CG ≥ 5d. In some cases the asymmetrical laying of connectors is needed (Sg HT ≠ Sg NT ). (2) The compression design strength of the connector is the lower between the with- (4) The thread axial resistance to withdrawal has been evaluated considering an effective thread length equal to Sg. The connectors must be inserted at 45° with respect to the shear plane. drawal-side design strength (R 1V,d) and the instability design strength (R 2V,d). RV,d = min R1V,k kmod γM R2V,k γM1 The coefficients γM and kmod should be taken according to the current regulations used for the calculation. (3) The assembly height (m) applies in the event of symmetrical installation of the flush connectors (Sg HT = Sg NT ) above the elements. In the case of asymmetric installation, it is necessary to provide for installation of the connectors on the main beam side with the head buried so as to guarantee the effective lengths (Sg HT, Sg NT ) indicated in the table. 150 | VGZ | STRUCTURES GENERAL PRINCIPLES: • • Characteristic values comply with the EN 1995:2014 standard in accordance with ETA-11/0030. For the calculation process a timber characteristic density ρk = 385 kg/m3 has been considered. • Dimensioning and verification of the timber elements must be carried out separately. • For different calculation configurations, the MyProject software is available (www.rothoblaas.com).
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