Title: Listeskrue 3,5x45.pdf
If screws with an outer thread diameter d > 8 mm are used in load bearing timber structures, the structural solid or glued laminated timber, laminated veneer lumber and similar glued members must be from spruce, pine or fir. This does not apply for screws in pre-drilled holes.Page 11 of 37 of European Technical Assessment no. ETA-11/0027, issued on 2016-10-26The minimum angle between the screw axis and the grain direction is α = 0°.The screws shall be driven into softwood without predrilling or after pre-drilling. The screws shall be driven into hardwood with a maximum characteristic density of 730 kg/m³ after predrilling.Alternatively, minimum distances and spacing for exclusively axially loaded “fischer Power-Fast” screws in non-predrilled holes in members of solid timber (softwood and hardwood), glued laminated timber or similar glued products (softwood and hardwood) with a minimum thickness t = 12∙d and a minimum width of 8∙d or 60 mm, whichever is the greater, may be taken as: