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Wood supporting steel, masonry, etc

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Title: Wood supporting steel, masonry, etc

There was a code change proposal in the 2003/2004 IBC process to clarify this. Take a look at S66-03/04 (p.36) of the following document:

Make sure you read all the way through the public comment changes. It was originally disapproved by the committtee, but then approved as modified during public comment.



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: Jim Wilson <wilsonengineers(--nospam--at)>
Subject: Wood supporting steel, masonry, etc.
To: seaint(--nospam--at)
What are the limits for using wood as the vertical load carrying system?
IBC 2304.10 Heavy timber construction states "(Wood) Columns shall be continuous or superimposed throughout all stories by means of reinforced concrete ...".

But 2304.12 Wood supporting masonry or concrete states "Wood members shall not be used to permanently support the dead load of any masonry or concrete."

The exceptions to 2304.12 do not suggest that reinforced conrete is acceptable. Which is it?
What about steel construction? Can vertical wood framing be used to support steel floor/roof framing in commercial applications? I can't find any similar mention of it in the IBC.

Jim Wilson, PE
Stroudsburg, PA