Go Back   DIY Chatroom Home Improvement Forum > Home Improvement > Building & Construction

CLICK HERE AND JOIN OUR COMMUNITY TODAY...IT'S FREE!

Reply
 
Thread Tools Search this Thread Display Modes
Old 08-04-2008, 11:21 AM   #1
Newbie
 
Join Date: Aug 2008
Posts: 12
Rewards Points: 0
Share |
Default

sizing a flitch beam for small space


I am doing a bathroom and want to move the door. My problem is that there is an existing beam that carries the roof weight resting on the wall that the doorway is in. I have 4 inches from the bottom of the beam to the top of the door. My flitch beam would be a total of 36 inches long and 4 inches thick. The weight would only be offset by about 9 inches. Does anyone know if a 4 inch flitch beam (or steal "I" beam) would be sufficient thickness for the roof weight of a 1 story house?

Background: There is a cantelver on the back of the house 24 foot long, the beam rests where the load bearing wall would be and the roof joists rest on the beam. The span that the existing beam carries is 12 foot resting on the wall.

gorf is offline   Reply With Quote
Old 08-04-2008, 05:18 PM   #2
Registered User
 
Termite's Avatar
 
Join Date: Apr 2008
Posts: 6,520
Rewards Points: 0
Default

sizing a flitch beam for small space


This is something that an engineer should handle for you. There are so many variables that depend on how your house was framed, we can't begin to assist you with sizing the header.

I will say that I never see 4" W-shapes in residential remodel situations, except by foundation repair guys. Why not remove the existing header and use a longer, deeper header in its place. Two plies of LVL would likely span the opening with no issue. Is there a headroom problem that prevents you from doing this? Addition of a steel beam under an existing header might allow you to span the opening, but removal of the kingstud(s) will remove the header's lateral (roll) prevention.

A visit to an engineered wood specialist at a lumber yard (not a box store...A LUMBER YARD) would be a good idea. They could size an LVL beam to take the load if you take them all the dimensional information and let them know what is bearing on the wall. They don't charge to size LVL or PSL beams in most cases, and they can provide the computer-generated calcs showing the beam's performance.

Termite is offline   Reply With Quote
Old 08-04-2008, 08:04 PM   #3
Newbie
 
Join Date: Aug 2008
Posts: 12
Rewards Points: 0
Default

sizing a flitch beam for small space


Quote:
Originally Posted by thekctermite View Post
This is something that an engineer should handle for you. There are so many variables that depend on how your house was framed, we can't begin to assist you with sizing the header.
Thanks for the feedback. I talked to a GC today and he basically said that the only way he would do it was with 5.5 inch steel I beam. That would steal too much headroom so it looks like plan B = leave the door where it is.
gorf is offline   Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search
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
OSB Stronger than Plywood? Weathermaker01 Flooring 15 12-22-2012 09:06 AM
Cape Cod Style House Attic/Crawl Space Insulation Help Danielg Insulation 24 05-21-2012 08:20 AM
Lan beam sizing orcasrob Carpentry 5 08-05-2008 09:05 PM
Beam Sizing Riddler Carpentry 14 08-05-2006 12:46 AM




Top of Page | View New Posts

Copyright © 2003-2014 Escalate Media. All Rights Reserved.