>The explanation was felt to be in the lesser
>beam stiffness but greater psi strength of the box nail's wire.
Forgive my ignorance with the lingo, but what is meant by "psi" strength?
>Energy absorption at high drifts was reported superior with box nails
Intuitively, it seems that in wood, less rigid fasteners would share load
better and not tend to fail in a "zipper" effect as much as more rigid
fasteners would. I hate to use a bolt thicker than 1/2" dia. in 2x trusses,
but others feel 3/4" are a must to reduce the number of fasteners and,
therefore, cost. To me, installing (8) 1/2" bolts is barely more work than
installing (5) 3/4" bolts and makes much more sense.