Wood Screws
Wood Screws
(OP)
I designed a diaphragm using IBC 2003 and all the tables utilize nails for fastening (as do all other resources I have ever seen). I want to use screws to minimize squeaky floors. Where can I find a reference that gives equivalent screw sizes for common nails?
I compared the allowable shear values between common nails and wood screws using the NDS tables. Using common parameters an 8d common nail equivalent is a 7g screw. What is a 7g screw? Is that a #7 screw?
Thanks in advance.
I compared the allowable shear values between common nails and wood screws using the NDS tables. Using common parameters an 8d common nail equivalent is a 7g screw. What is a 7g screw? Is that a #7 screw?
Thanks in advance.






RE: Wood Screws
RE: Wood Screws
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RE: Wood Screws
Appreciate the response, but what I'm looking for is more than a quick answer that will conservatively work. I need to be able to site a reference for this project and others in the future. We often work with municipalities that require submitting calcs and they can be picky.
RE: Wood Screws
That information gave me the info I needed.
Thanks.
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RE: Wood Screws
RE: Wood Screws
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RE: Wood Screws
Fastenal has not been the best source. Contacted them about some screws we use, and was told that no manufacturer's data exists. Recommend trying elsewhere if possible.
RE: Wood Screws
The more you know, the more you
know you don't know....
RE: Wood Screws
use L/480 joist deflection
use additional blocking
glue decking (liquid nails)
screw decking
RE: Wood Screws
RE: Wood Screws
Also keep in mind squeaking may be cause by other things besides the fastners. Sometimes the joist hangers will produce skueaking along with duct work.
RE: Wood Screws
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"boo1 (Mechanical)
9 Mar 05 14:20
To minimize wood floor squeaks:
use L/480 joist deflection
use additional blocking
glue decking (liquid nails)
screw decking"
Boo1 is correct, but in addition I would limit the span lengths of your lumber or I-joist. With the performance of I-Joists now, you can get some long spans, which even at a deflection limit of L/480 allows for too much bounce. Bounce and deflection allow for movement in the floor, which can lead to squeaking. If you have sqeaking in your floor after using glue and screw - something was done wrong in the installation. Usually, this occurs when the plywood is moved in to final position prior to screwing it down. Care has to be taken so that the glue is not smeared too much. A good framing crew can achieve this.
RE: Wood Screws