Ring Shank Nail Withdrawl Loads Roof Sheathing & Diaphragm - NDS verse FBC
Ring Shank Nail Withdrawl Loads Roof Sheathing & Diaphragm - NDS verse FBC
(OP)
The florida residential building code (and maybe the IRC?) presriptively requires 8d ring shank nails for roof sheathing attachment I have the following questions regarding their use:
1. What are their withdrawl loads? NDS doesn't seem to address unless it is appropriate to use the threaded nail values?
2. How does the diameter of a ring shank nail compare to common?
3. How does one reconcile the fact that NDS diaphragm capacities are for common nails? If necessary can you adjust the values for ring shank nails?
4. In evaluating required nail spacing for withdrawl does one need to consider simulatneous shear forces as part of of a roof diaphragm action?
1. What are their withdrawl loads? NDS doesn't seem to address unless it is appropriate to use the threaded nail values?
2. How does the diameter of a ring shank nail compare to common?
3. How does one reconcile the fact that NDS diaphragm capacities are for common nails? If necessary can you adjust the values for ring shank nails?
4. In evaluating required nail spacing for withdrawl does one need to consider simulatneous shear forces as part of of a roof diaphragm action?






RE: Ring Shank Nail Withdrawl Loads Roof Sheathing & Diaphragm - NDS verse FBC
That said, I'd go with what the local building department wants unless they say you can use Spiral Shanks instead. I think Spiral Shank nails are commonly used for roof nailing in the mid-west USA (tornado country). They are not all that expensive and come in clips and rolls for most nail guns. Check with the manufacturers for withdrawal values because spiral pitch and shank shape may vary slightly between manufacturers.
LonnieP