How Many 2x8's For Center Beam - Roofing/Siding - DIY Home Improvement | DIYChatroom

Go Back   DIY Chatroom Home Improvement Forum > Home Improvement > Roofing/Siding


Thread Tools Display Modes
Old 10-28-2012, 09:35 AM   #1
Join Date: Oct 2012
Posts: 1
Rewards Points: 10

how many 2x8's for center beam

I have a garage that measures 21'wx20'l. I need to reinforce the center with a bem and I'm making that of 2x8's. How many 2x8's deep should I use? 2 or 3? Also how many uprights should I use, 2 or 3, andshould I use 2x8's for them, how many if yes?


Last edited by mhewko; 10-28-2012 at 09:46 AM. Reason: more questions
mhewko is offline   Reply With Quote
Old 10-28-2012, 10:43 AM   #2
Civil Engineer
Join Date: Mar 2009
Location: Boston
Posts: 5,679
Rewards Points: 4,938

You are asking for specific design from a do it yourself internet chat forum. This type of question is pretty common on this forum, and often comes from folks who are not confident they can do the design themselves, but do not want to pay to hire an engineer or architect to perform the design. Unfortunately design of a major supporting element for an inhabitable structure carries serious risk, since collapse of the garage has the potential for injury to people.

The professionals on this forum cannot legally give you explicit design advice without a contract, plus they need to be licensed in your jurisdiction. That leaves you with unlicensed non-professionals who may be willing to offer specific design information without having visited your site to determine specific conditions. Are you ready to accept and act on such advice? Is your building inspector willing to grant you a permit based on advice from a non-professional on an internet chat forum?

My suggestion is to go to a local lumberyard (NOT a big box store), show them photos and a plan for your garage, and allow them to include the design of the beam in the price for the lumber. One way or another, you are likely to end up paying for structural design of the beam, and getting the lumberyard to roll it up in the price of the lumber (assuming the lumberyard has an on call engineer) could easily be the lowest cost way to get it done.


Daniel Holzman is online now   Reply With Quote
The Following User Says Thank You to Daniel Holzman For This Useful Post:
concretemasonry (10-28-2012)
Old 10-28-2012, 09:29 PM   #3
Join Date: Dec 2011
Location: zentral Iowa
Posts: 1,437
Rewards Points: 960

I didn't see a thank you button.

What the Holzman said.
cleveman is offline   Reply With Quote

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
OSB Stronger than Plywood? Weathermaker01 Flooring 15 12-22-2012 09:06 AM
swingset beam, 4x6 or sister'd 2x8's? D270 Building & Construction 4 09-22-2011 01:01 AM
How to repair main support beam Jerry48ece Building & Construction 0 01-08-2011 08:38 PM
Crawl Space Beam and Joist Support Questions Fire4Effect Building & Construction 5 06-28-2009 01:07 PM
Beam Replacement? Steve Dailey Carpentry 5 05-19-2008 08:46 PM

Top of Page | View New Posts


Search Engine Friendly URLs by vBSEO 3.6.1