Sistering a Wood Beam with Steel

Reply

  #1  
Old 12-07-04, 05:36 PM
Instance
Visiting Guest
Posts: n/a
Sistering a Wood Beam with Steel

I'm removing a support post from under a 6 x 8 beam and am going to sister the with steel angle to reinforce it. A structrucal engineer calculated that I could span the 14' with two pieces of steel angle sistered to the beam. My question is how to best sister them to the beam? Just through-bolt them? If so, how often and with what diameter hardware? This still won't leave the ends of the steel angle supported on the posts.

Best regards,
Mark
 
Sponsored Links
  #2  
Old 12-07-04, 09:54 PM
awesomedell's Avatar
Member
Join Date: Mar 2003
Location: USA
Posts: 2,425
Hi Mark & welcome to the forums. Bolting completely thru the beam & both angles about every 12" to 16", with like say a 1/2" bolt should do the trick I'd say. Not quite sure what you mean by "still won't leave the ends of the steel angle supported on the posts."
 
  #3  
Old 12-07-04, 11:21 PM
steve_gro's Avatar
Member
Join Date: Jan 2004
Location: San Francisco
Posts: 983
Those sound like good questions for the structural engineer.
 
  #4  
Old 12-08-04, 05:52 PM
Banned. Rule And/Or Policy Violation
Join Date: Jul 2004
Posts: 463
Cannot Drill Through a Beam

Building Codes prohibit the drilling, notching and boring of any structural beam within any home.

The engineer may have casually mentioned the use of angled steel to support the beam, but you had better get clear instructions from him AND your local code office before you do anything to the existing beam.

I'll presume that you have simply misundertsood the structural engineer's instructions at this point.

Major structural alterations such as your proposed undertaking are NOT a DIY project.
 
  #5  
Old 12-08-04, 07:11 PM
Instance
Visiting Guest
Posts: n/a
Someone led me to a 'flitch plate' design elsewhere. You sister steel plates on the sides of the joist by through-bolting. The seems to be a very common way to increase the deflection stength of a beam when removing a support. I'm not sure about my local codes, but I read discussions by building inspectors in regard to flitch plates and they never mention the bolting as a concern. There's a great PDF on the subject at;

http://www.destefanoassociates.com/tech/flitch.pdf

Thanks everyone.

-Mark
 
Reply

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Thread Tools
Search this Thread
Display Modes