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RE: Lag Screws in Withdrawal

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Title: Lag Screws in Withdrawal
-----Original Message-----
From: Showalter, Buddy [mailto:Buddy_Showalter(--nospam--at)]On Behalf Of AWC Info
Sent: July 9, 2007 9:30 AM
To: 'seaint(--nospam--at)'
Subject: Lag Screws in Withdrawal


Table 11.5.1E of the 2005 NDS shows the following for lag screws loaded in withdrawal and not laterally:

Edge Distance 1.5D End Distance 4D Spacing 4D



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: "Thor Tandy" <vicpeng(--nospam--at)>
To: "SEAINT" <seaint(--nospam--at)>
Subject: Lag Screws in Withdrawal

I have the specs (in the handbook) on edge, and end, distances for lag = screws. For withdrawal limits, is there a different spec or would I use = distances for across or with-grain?


Thor A. Tandy P.Eng, MIStructE, Struct Eng
Victoria, BC