Eurotec catalogue fastening technology Page 224
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Timber engineering When analysed, the minimum distances for KonstruX screws in pre-drilled holes that are loaded in a crosswise direction are as follows according to the position of the direction of the grain Minimum distances for KonstruX screws in pre-drilled holes that are loaded in a crosswise direction with a force / fibre angle of 0° and 90° Force / fibre angle α = 0° Force / fibre angle α = 90° Axial distance parallel to the direction of the grain a1 [mm] 5∙d 33 4∙d 33 Axial distance perpendicular to the direction of the grain a2 [mm] 3∙d 20 4∙d 33 Distance from the centre of gravity of the screw area driven into the wood from the unloaded end of the end grain a3,c [mm] 7∙d 46 7∙d 46 Distance from the centre of gravity of the screw area driven into the wood from the loaded end of the end grain a3,t [mm] 12 ∙ d 78 7∙d 46 Axial distance perpendicular to the unloaded edge a4,c [mm] 3∙d 20 3∙d 20 Axial distance from the loaded edge a4,t [mm] 3∙d 20 7∙d 46 When analysed, the minimum distances for KonstruX in non-pre-drilled holes, loaded in a crosswise direction, are as follows according to the position of the direction of the grain Minimum distances for KonstruX screws in non-pre-drilled holes that are loaded in a crosswise direction with a force / fibre angle of 0° and 90° Force / fibre angle α = 0° 224 Force / fibre angle α = 90° Axial distance parallel to the direction of the grain a1 [mm] 12 ∙ d 78 5∙d 33 Axial distance perpendicular to the direction of the grain a2 [mm] 5∙d 33 5∙d 33 Distance from the centre of gravity of the screw area driven into the wood from the unloaded end of the end grain a3,c [mm] 10 ∙ d 65 10 ∙ d 65 Distance from the centre of gravity of the screw area driven into the wood from the loaded end of the end grain a3,t [mm] 15 ∙ d 98 10 ∙ d 65 Axial distance perpendicular to the unloaded edge a4,c [mm] 5∙d 33 5∙d 33 Axial distance from the loaded edge a4,t [mm] 5∙d 33 10 ∙ d 65
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