Need a book? Engineering books recommendations...

Return to index: [Subject] [Thread] [Date] [Author]

RE: IBC Conventional Light Framed Construction

[Subject Prev][Subject Next][Thread Prev][Thread Next]

See Section 2308.9.3 (2006 IBC), after bullet point #8, which requires:  “For Methods 2, 3 … , each panel must be at least 48 inches in length”.    Section 2308.9.3.1 and 2308.9.3.2 provide alternative methods which result in bracing panels that are less than 48” in length.





Thomas D. Skaggs, Ph.D., P.E.
Manager, Product Evaluation

Technical Services Division
APA - The Engineered Wood Association
7011 S. 19th Street
Tacoma, WA 98466
ph: 253/565-6600
fx: 253/620-7235




From: Andy Heigley [mailto:aheigley(--nospam--at)]
Sent: Wednesday, October 17, 2007 10:27
To: seaint(--nospam--at)
Subject: RE: IBC Conventional Light Framed Construction


Thanks for your help.


Gary:  you stated that you’d have a minimum 4’-0” long panel placed at the midpoint.  This is exactly my question.  Where does it state that the minimum panel length is 4’-0”?


I know in the IRC it states the 16% of the length, but if you have a commercial building, you have to use the IBC. 


Just for example, let’s say my client wants to stay within the limits of Conventionally Framed Construction, but wants a storefront appearance and says I want the openings to be as large as code allows and spacing between windows to be minimal.  Let’s say the wall is 30’ long.  If I have a 1’-0” wall brace at each corner and one in the midpoint of the wall.  It satisfies the 12’-6” end distance, but if you look at the bracing ratio, you are only at 10% of the total wall length. 


Now I’ll also state that I’d never use (3) 1’-0” wide brace wall segments in a 30’ long wall to brace the building… but I’m just saying the code seems to have left some guidelines out, or I can’t find them. There should be something like a minimum length to be considered a braced wall segment, must satisfy a minimum H/L ratio or something.


I know I would use my engineering judgment to set minimums in this case, but if I’m to look at the details of the code, they are not there.