Eurotec catalogue fastening technology Page 300
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Wood construction screws Technical information Paneltwistec, countersunk-head screw, yellow galvanised Dimensions d1 x L [mm] dk AD ET [mm] [mm] [mm] Extraction resistance Head pull-through resistance Fax,90,Rk [kN] Fax,head,Rk [kN] Wood / wood shearing Fla,Rk [kN] α= 0° α=90° Fla,Rk [kN] Fla,Rk [kN] αAD= 0° αAD= 90° αET= 90° αET= 0° t [mm] Fla,Rk [kN] Fla,Rk [kN] α= 0° α= 90° 3,5 x 30 7,0 12 18 0,84 0,59 0,62 1 0,86 3,5 x 35 7,0 14 21 0,98 0,59 0,67 1 0,92 3,5 x 40 7,0 16 24 1,12 0,59 0,70 1 0,95 3,5 x 45 7,0 18 27 1,26 0,59 0,74 1 0,99 3,5 x 50 7,0 20 30 1,40 0,59 0,78 1 1,02 4,0 x 30 8,0 12 18 0,93 0,77 0,71 2 0,91 4,0 x 35 8,0 14 21 1,08 0,77 0,80 2 1,07 4,0 x 40 8,0 16 24 1,24 0,77 0,84 2 1,15 4,0 x 45 8,0 18 27 1,39 0,77 0,88 2 1,19 4,0 x 50 8,0 20 30 1,55 0,77 0,92 2 1,23 4,0 x 60 8,0 24 36 1,86 0,77 1,01 2 1,31 4,0 x 70 8,0 28 42 2,17 0,77 1,03 2 1,38 4,0 x 80 8,0 32 48 2,48 0,77 1,03 2 1,46 4,5 x 35 9,0 14 21 1,18 0,97 0,90 2 1,32 4,5 x 40 9,0 16 24 1,35 0,97 1,00 2 1,34 4,5 x 45 9,0 18 27 1,52 0,97 1,03 2 1,40 4,5 x 50 9,0 20 30 1,69 0,97 1,08 2 1,44 4,5 x 60 9,0 24 36 2,03 0,97 1,17 2 1,53 4,5 x 70 9,0 28 42 2,36 0,97 1,26 2 1,61 4,5 x 80 9,0 32 48 2,70 0,97 1,26 2 1,70 5,0 x 40* 10,0 16 24 1,45 1,20 1,11 2 1,44 5,0 x 50* 10,0 20 30 1,82 1,20 1,24 2 1,67 5,0 x 60* 10,0 24 36 2,18 1,20 1,34 2 1,76 5,0 x 70* 10,0 28 42 2,54 1,20 1,44 2 1,85 5,0 x 80* 10,0 32 48 2,90 1,20 1,52 2 1,94 5,0 x 90* 10,0 36 54 3,27 1,20 1,52 2 2,03 5,0 x 100* 10,0 40 60 3,63 1,20 1,52 2 2,12 5,0 x 120* 10,0 50 70 4,24 1,20 1,52 2 Calculation according to ETA-11/0024. Wood density ρk= 350 kg/m³. All mechanical values provided should be viewed as subject to the assumptions that have been made and represent example calculations. All values are calculated minimum values and are subject to typographical and printing errors. a) The characteristic values of the load-bearing capacity Rk cannot be treated as equivalent to the max. possible load (the max. force). Characteristic values of the load-bearing capacity Rk should be reduced to dimensioning values Rd with regard to the usage class and class of the load duration: Rd= Rk · kmod / γM. The dimensioning values of the load-bearing capacity Rd should be contrasted with the dimensioning values of the loads (Rd ≥ Ed). 2,27 Example: Characteristic value for constant load (dead weight) Gk= 2,00 kN and variable load (e. g. snow load) Qk= 3,00 kN. kmod= 0,9. γM= 1,3. → Dimensioning value of the load Ed= 2,00 · 1,35 + 3,00 · 1,5= 7,20 kN. The load-bearing capacity of the joint is therefore considered to have been demonstrated if Rd ≥ Ed. → min Rk= Rd · γM / kmod i.e. the characteristic minimum value is calculated based on: min Rk= Rd · γM / kmod → Rk= 7,20 kN · 1,3/0,9= 10,40 kN → comparison with table values. Please note: These are planning aids. Projects must only be calculated by authorised persons. *Applies to TX20 and TX25 300 Fla,Rk [kN] Steel / wood shearing
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