Screw laths, squared timbers, treads, stringers etc.
Screwing of slats and squared timber (z. B. sogsichere fixing battens)
use stair
Fitting of treads / risers with Treppenwange
benefits
Significantly reduced screwing-and reduced splitting effect
Length specification and manufacturer ID on the head
Higher head pulling forces compared to Senkkopfschraube
Officially approved
Under Z-9.1-235 as wood connecting means and Z-9.1-511 for roof insulation.)
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