Currently prescribed 8d common nails would only meet allowable design uplift pressures for some limited roof conditions roof heights and only up to wind speeds of 120 mph said the team in their code change proposal.
Proper florida roof nailing 8d.
Have shown an uplift capacity of 292 psf while ordinary 8d common nails provide only 126 psf of uplift capacity.
Your contractor must fill out and sign an affidavit stating that the roof deck upgrade requirements have been met and submit it to the local building department as part of the requirements for a final roof inspection.
In the florida team s testing and other studies 8d ring shank nails at 6 inches o c.
The 8d gun nails that the roofers are using are 2 3 8 if that nail measured 2 7 8 or more it would likely be an 8d nail.
Deformed shank i e ring or screw shank nails are required near ridges gables and eaves in areas with design wind speeds over 110 mph 3 second gust but it is rec.
For site built single family residential structures the fastening shall be in accordance with section r908 7 1 1 or r908 7 1 2 as appropriate for the existing construction.
Fasten panels with a minimum of 8d common 0 131 inch by 2 1 2 inch nails spaced a maximum of 6 inches on center at supported panel ends and edges.
Full round heads are recommended to avoid head pull through.
8d nails shall be a minimum of 0 113 inch 2 9 mm in diameter and shall be a minimum of 2 1 4 inch 57 mm long to qualify for the provisions of this section for existing nails regardless of head shape or head diameter.
Be a minimum of 2 1 4 inch long to qualify for the provisions of this section.
Accordance with section 706 7 1 1 or 706 7 1 2 as appropriate for the existing.
At intermediate supports fasten panels 12 inches on center.
An 8d nail 2 5 inches long is the minimum size nail to use for fastening sheathing panels.
An 8d nail is 2 5 long and protrudes though the roof sheathing a little less than 2 as shown below.
Add 8d ring shank nails so that the maximum spacing between existing and added nails is 6 along intermediate roof framing members in all areas inside the 4 perimeter.
Deformed shank i e ring or screw shank nails are required near ridges gables and eaves in areas with design wind speeds over 110 mph 3 second gust but it is typical layout of roof.
Fasten roof sheathing panels properly.
8d nails shall be a minimum of 0 113 inch in diameter and shall.
Full round heads are recommended to avoid head pull through.
However generally speaking in all areas of florida if the existing roof decking is fastened with either staples or 6d nails the entire roof deck will need to be re nailed with 8d round head ring shank nails spaced no greater than 6 inches on center.
If the design wind speed for your area is less than 120 mph add 8d ring shank nails at 6 spacing along all the intermediate roof structure members within 4 of the edges and ridges of the roof.
An 8d nail 2 5 inches long is the minimum size nail to use for fastening sheathing panels.
