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Allowable shear capacity of nails

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Title: Allowable shear capacity of nails

There is a new table in Appendix I of the 2001 NDS(r) that lists Fyb values for fasteners, including common nails. Here's the pertinent info:

Common, box, or sinker nail, spike, lag screw, wood
screw (low to medium carbon steel)

0.099" ≤ D ≤ 0.142" 100,000psi
0.142" < D ≤ 0.177" 90,000psi
0.177" < D ≤ 0.236" 80,000psi
0.236" < D ≤ 0.273" 70,000psi
0.273" < D ≤ 0.344" 60,000psi
0.344" < D ≤ 0.375" 45,000psi



John "Buddy" Showalter, P.E.
Director, Technical Media
AF&PA/American Wood Council
1111 19th Street, NW, Suite 800
Washington, DC 20036
P: 202-463-2769
F: 202-463-2791
The American Wood Council (AWC) is the wood products division of the American Forest & Paper Association (AF&PA). AWC develops internationally recognized standards for wood design and construction. Its efforts with building codes and standards, engineering and research, and technology transfer ensure proper application for engineered and traditional wood products.

The guidance provided herein is not a formal interpretation of any AF&PA standard.  Interpretations of AF&PA standards are only available through a formal process outlined in AF&PA's standards development procedures.


From: utej(--nospam--at)
To: <seaint(--nospam--at)>
Subject: Allowable shear capacity of nails
What is the allowable shear capacity of a typical common nail or how may it be determined? Also, what are the typical Fy and Fu values for nails? Reference? The NDS lists Fyb values and the 1997 NDS Appendix I section I.4 states "Recent research indicates that Fyb for bolts is approximately equivalent to the average of bolt tensile yield strength and bolt tensile ultimate strength, Fyb = Fy/2 + Fu/2."