Beam Sizing - Carpentry - DIY Chatroom Home Improvement Forum


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

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

Reply
 
Thread Tools Display Modes
Old 08-12-2011, 07:44 AM   #1
Newbie
 
Join Date: Aug 2011
Posts: 1
Rewards Points: 10
Default

Beam Sizing


How do I calculate the size Beam I need to install Bi fold doors.Openining is 5.5 metres wide and 2.4 metres high. It does not support a tiled roof, just a colourbond roof. Can any one help please.
Thankyou

Advertisement

e kavaz is offline   Reply With Quote
Old 08-12-2011, 07:53 AM   #2
Civil Engineer
 
Join Date: Mar 2009
Location: Boston
Posts: 4,306
Rewards Points: 2,190
Default

Beam Sizing


OK, you gotta be overseas, I don't work in metric too often. Sizing a beam is identical the world over. You need to know the loads that the beam will support, which is a function of the geometry (clear span) and unit loading of everything above the beam (live plus dead load with appropriate factors of safety). You generally get the loading from code if you are doing residential or light commercial. Then either you get the beam size from standard tables, IF THEY APPLY, or you use principles of mechanics to compute the required beam size.

Beam size depends on the load (as discussed), and the material properties of the beam. A sawn lumber beam is going to be a different size than a steel beam, which is going to be different than a glue laminated beam, etc. The span you quote is relatively large, so you are looking at a fairly large beam. But it cannot be sized over the internet due to the need for detailed, accurate knowledge of your specific code requirements, and accurate knowledge of the geometry of your building. Sometimes (I know this is a radical idea for a DIY forum) people actually HIRE professional engineers or architects to size the beam for them, especially if the geometry is complicated, the loads are large, or they have no idea how to do it themselves. Sometimes you can bring a sketch to a lumberyard, and the yard will size the beam and include the cost with the Glulam they sell you.

Advertisement

Daniel Holzman is online now   Reply With Quote
Reply


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 10:06 AM
LVL Beam Sizing rjmcg Building & Construction 17 04-25-2011 07:55 AM
How to repair main support beam Jerry48ece Building & Construction 0 01-08-2011 09:38 PM
sizing a flitch beam for small space gorf Building & Construction 2 08-04-2008 09:04 PM
Beam Sizing Riddler Carpentry 14 08-05-2006 01:46 AM




Top of Page | View New Posts