Point Load - LVL Beam Install, Load Bearing Wall - Remodeling - DIY Chatroom Home Improvement Forum

Go Back   DIY Chatroom Home Improvement Forum > Home Improvement > Remodeling


Thread Tools
Display Modes
Old 04-05-2014, 06:02 PM   #1
Join Date: Feb 2014
Posts: 18
Rewards Points: 10

Point Load - LVL Beam Install, Load Bearing Wall

The house is 24x32 ft. In the basement, there is a beam that runs down the centre of the house (32ft long) with 12ft spans on either side. There are teleposts every 8 feet (so 5 support points - foundation on each side then a telepost every 8 feet).

On the main floor above, there is a supporting wall that runs directly on top of the beam below. This wall supports the roof above, stick built with roof rafters overlapping and resting on top of this wall.

My question is:

I am removing an 11 foot section of this main floor wall. I plan to use 2 x 1-3/4" x 11-7/8" LVL for a beam. This may actually be over kill, but that is besides the point. At one end of the beam, the supporting post will be directly above one of the basement teleposts. I plan to add blocking to the floor between the beam and new post, but it otherwise transfers weight straight down, post on post. Since the beam is 11 feet, and my posts downstairs are 8 feet apart, on the other end I will have my beam support coming down 3 feet off the nearest basement telepost.

Based on the information provided, will the basement beam need additional support for this point load above it? I believe the basement beam is 4 2x12's. I'm dealing with a pretty standard home - no crazy roof structure or long floor spans, everything has been looked at expect my understanding of the weight from this new point load finding it's way to the foundation. Is blocking on the side in question with the post resting on the basement beam mid-span ok? Or do both ends need to be post on post?

This write up is basically the exact same project, but they don't cover the beam support downstairs (and I think this home has a steal I-beam instead of lumber). Anyway, it's pretty similar to my circumstances if you'd like more insight.



Last edited by Zif0684; 04-05-2014 at 06:10 PM.
Zif0684 is offline   Reply With Quote
Sponsored Links
Old 04-05-2014, 07:08 PM   #2
iminaquagmire's Avatar
Join Date: Jul 2010
Location: Chicagoland
Posts: 422
Rewards Points: 338

You need an engineer. Nobody can safely tell you if what you propose would be a problem without pictures or being physically on site. A lot of variables exist such as dimensions and layouts of the affected rooms, your location, roof structure, post specifications, and beam specifications.
iminaquagmire is offline   Reply With Quote
Sponsored Links
Old 04-05-2014, 07:29 PM   #3
Civil Engineer
Join Date: Mar 2009
Location: Boston
Posts: 5,832
Rewards Points: 5,246

This is actually a pretty complicated structural problem, given the offsets, and the replacement of distributed loads with point loads. I had a very similar situation when I took out about 11 feet of wall in my kitchen and replaced it with a steel header supported on posts. The posts carried down to a main beam in the basement.

You need to check at a MINIMUM the following:

1. Bending moment and shear in the main basement beam
2. Buckling of all posts
3. Connections between posts and main beam, and posts to header
4. Capacity of header in bending

Depending on geometry, there may some other calculations required. This problem is much too difficult for standard tables. Your engineer will be happy to earn their money doing the calcs.
Daniel Holzman is offline   Reply With Quote
Sponsored Links

Thread Tools
Display Modes

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

Similar Threads
Thread Thread Starter Forum Replies Last Post
Removing part of a load bearing wall *with pics* shane2943 Remodeling 7 09-29-2012 09:31 PM
Removing wall under a load bearing beam. Joezer Building & Construction 17 12-05-2010 12:08 PM
Load bearing wall removal options ikessky Remodeling 2 08-24-2009 03:18 PM
Load Bearing Wall? Traybae Remodeling 3 11-05-2006 01:39 PM
Load Bearing Wall? Traybae Building & Construction 1 11-05-2006 01:01 PM

Top of Page | View New Posts