Has anyone heard of a valid use of 8d spiral nails for attaching 5/8" OSB to metal trusses. I am working on a porch addition to a 3-year old school where this was done on the roof. I am concerned that the nails will not be adequate for uplift. This project is in a 130 mph, exp b location. The uplift forces at the corner can be ~75 lbs per nail based on a 6" pattern.
Regards,
Andy Richardson
Beaufort, SC
www.structuralinnovationsllc.com