Rothoblaas - Wood screws and connectors Pagina 79
Commercieel klantenaanbod**Beste verkopers van RothoBlaas Deutschland
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CHARACTERISTIC VALUES EN 1995:2014 SHEAR(1) TENSION timber - CLT narrow face thread withdrawal narrow face(3) thread withdrawal narrow face(4) head pull-through (5) RV,k RV,k Rax,k Rax,k Rhead,k [kN] [kN] [kN] [kN] [kN] CLT - timber lateral face 4,78 3,17 6,08 4,42 6,56 5,39 3,43 7,02 5,03 6,56 5,42 3,43 7,02 5,03 6,56 5,42 4,15 9,36 6,51 6,56 5,42 4,15 9,36 6,51 6,56 5,42 4,69 11,70 7,96 6,56 5,42 4,69 11,70 7,96 6,56 5,42 4,69 11,70 7,96 6,56 5,42 4,69 11,70 7,96 6,56 5,42 4,69 11,70 7,96 6,56 5,42 4,69 11,70 7,96 6,56 5,42 4,70 14,04 9,38 6,56 5,42 4,70 14,04 9,38 6,56 5,42 4,70 14,04 9,38 6,56 5,42 4,70 14,04 9,38 6,56 5,42 4,70 14,04 9,38 6,56 5,42 4,70 14,04 9,38 6,56 5,42 4,70 14,04 9,38 6,56 5,42 4,70 14,04 9,38 6,56 GENERAL PRINCIPLES: • Characteristic values comply with the EN 1995:2014 standard and national specification ÖNORM EN 1995 - Annex K in accordance with ETA-11/0030. • Values were calculated considering the threaded part as being completely inserted into the wood. • • Design values can be obtained from characteristic values as follows: • Sizing and verification of the timber elements and panels must be done separately. Rk kmod Rd = γM 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. • The characteristic shear resistances are calculated for screws inserted without pre-drilling hole. In the case of screws inserted with pre-drilling hole, greater resistance values can be obtained. • The shear resistance characteristics are calculated considering a minimum fixing length of 4 d1 . • The screws must be positioned in accordance with the minimum distances. • For the calculation process, a mass density of ρ k = 350 kg/m3 has been considered for CLT elements and a mass density of ρ k = 385 kg/m3 has been considered for timber elements. CARPENTRY | TBS | 79
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