Load Bearing Wall - Beam size

Reply

  #1  
Old 01-15-13, 11:25 AM
T
Member
Thread Starter
Join Date: Jan 2013
Location: Canada
Posts: 4
Received 0 Votes on 0 Posts
Load Bearing Wall - Beam size

I am knocking out an inside wall (with a doorway in it) that is load bearing. However, I'm having trouble finding the right answer to what size beam I will need to put in. I looked at the building code, but can't understand the size table. My job seems pretty straight forward- It is on my main floor (1 1/2 level house) the span of the beam will be 10' , there is no wall on the floor above it. So it is just supporting the upper level floor. The room above it is a spare bedroom, my beam will be supporting about 8'9'' of the floor joists in the room. I am fairly certain the 3 2X10's will be more than sufficient to carry the weight. With 2 2X6's on either side of it to support. Any thoughts would be appreciated!
 
  #2  
Old 01-15-13, 07:33 PM
czizzi's Avatar
Member
Join Date: Jul 2007
Location: USA
Posts: 7,388
Received 14 Votes on 12 Posts
If it is load bearing, you will need a permit to remove and the authorities in charge will be able to advise. However, I am confused, you description does not sound like a load bearing wall to me. The wall is acting more as a floor stiffener in your case.
 
  #3  
Old 01-16-13, 01:02 PM
BridgeMan45's Avatar
Member
Join Date: Oct 2011
Location: USA
Posts: 3,194
Received 1 Vote on 1 Post
Three 2 x 10s, properly connected and supported by decent columns down to the foundation, have a combined section modulus (S) of 64.17 cu. in. Enough to resist an applied bending moment of 70,587 in.-lb. (5882 ft.-lb.). Which works out to resisting a total uniform load of about 470 lb. per linear foot of beam, based on M = w x L squared, divided by 8. If your total applied load is greater than that, you need a stronger beam--three 2 x 12s have an S of 94.92 cu. in. (almost 50% stronger).
 
 

Thread Tools
Search this Thread
 
Ask a Question
Question Title:
Description:
Your question will be posted in: