Really? the US dept of Ag says the capacity should be "about 10% greater than that for wood screws of comparable diameter and length of threaded portion" (Encyclopedia of Wood, p. 7-10), but self-tapping screws are not covered under NDS, so I was looking for design values elsewhere...
I'm dealing with the connection of a cold formed steel track to a wood-framed roof, and can't fild withdrawal values for sheet metal screws in wood. Any ideas?
