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When did the Florida code start requiring roof sheathing nails to be ring-shank instead of smooth?
Wednesday, February 17, 2021
The 2004 edition of the Florida Building Code was the first to require roof sheathing nails to be 8d ring-shank type. Previously, 8d common (smooth) nails were acceptable. The 2004 code went into effect on October 1, 2005.
The code change was the result of research done by Richard Alvarez, a professor at the Hurricane Research Center of Florida International University. He found that 8d ring-shank nails have more than twice the uplift (withdrawal) resistance of 8d commons (292 psf vs. 126 psi).
Also see our blog posts When were staples banned for roof sheathing attachment in Florida? and Why is my roof sheathing sagging between the trusses? and Are H-clips required by the building code for roof sheathing?
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