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

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

Reply
 
Thread Tools Search this Thread Display Modes
Old 01-30-2011, 02:19 PM   #1
Newbie
 
Join Date: Jan 2011
Posts: 2
Share |
Default

45" span


I want to span 36' with a 6X6 HSS
there is no roof or floor load on the span. 10' per foot show load
canopy roof will 15 feet below also with a 10' snow load.

the beam is 46' with two 5' sheer supports on both sides

I worried about the beam buckling under its own weight.

Thanks

Futurearchitect is offline   Reply With Quote
Old 01-30-2011, 02:38 PM   #2
Experienced
 
Jackofall1's Avatar
 
Join Date: Dec 2010
Location: Southern Michigan
Posts: 2,822
Default

45" span


Haven't run the calc's but I would say, that a 6 x 6 of unknow thickness wouldn't span 36', there are beams that would able to span 36' with the right cross section.

Given your screen name "future architect" I would think that you are close enough to someone with enough engineering knowledge to size the member you need.

Mark

__________________
When its all said and done there is usually more said than done
Jackofall1 is offline   Reply With Quote
Old 01-30-2011, 02:41 PM   #3
Civil Engineer
 
Join Date: Mar 2009
Location: Boston
Posts: 4,142
Default

45" span


You need to post a carefully drawn diagram with your comments, I can't figure out what you are talking about. As for the loads, do you mean 10 pounds per square foot of snow load, or have you computed the snow load as 10 pounds per linear foot? And what is a sheer support, are you using nylon stockings to hold up the end of the beam?

As for the beam buckling under its own weight, are you planning to compute buckling load, or are you concerned about bending? Buckling is very complex to compute, bending is easier, but you still need a very carefully drawn diagram, and careful analysis of the actual load on the beam, before you can calculate the factor of safety against buckling, bending, and shear.
Daniel Holzman is offline   Reply With Quote
The Following User Says Thank You to Daniel Holzman For This Useful Post:
AndyGump (01-30-2011)
Old 01-30-2011, 02:44 PM   #4
Experienced
 
Jackofall1's Avatar
 
Join Date: Dec 2010
Location: Southern Michigan
Posts: 2,822
Default

45" span


Quote:
Originally Posted by Daniel Holzman View Post
And what is a sheer support, are you using nylon stockings to hold up the end of the beam?
OMG......LMAROTC
__________________
When its all said and done there is usually more said than done
Jackofall1 is offline   Reply With Quote
Old 01-30-2011, 03:35 PM   #5
Newbie
 
Join Date: Jan 2011
Posts: 2
Default

45" span


I new this would fail. I was just testing the site.

Telling all my friends not to use this forum.
tx.
Futurearchitect is offline   Reply With Quote
Old 01-30-2011, 03:39 PM   #6
Member
 
Steeler99's Avatar
 
Join Date: Jan 2011
Posts: 120
Default

45" span


I wouldn't use an HSS, I'd just a WF with plates welded to the sides to make it appear to be an HSS. A general rule of thumb would be take the span and divide it by two, that's the minimum height of the beam that you need. That's for floor loads. But consult with a PE, I wouldn't chance it
Steeler99 is offline   Reply With Quote
Old 01-30-2011, 03:48 PM   #7
Experienced
 
Jackofall1's Avatar
 
Join Date: Dec 2010
Location: Southern Michigan
Posts: 2,822
Default

45" span


Quote:
Originally Posted by Futurearchitect View Post
I new this would fail. I was just testing the site.

Telling all my friends not to use this forum.
tx.
What did you expect, really, there isn't any usable information in your initial question.

Like Daniel said, do up a sketch, post it with a well thought out explanation and then you will get a qualified answer.

Mark

__________________
When its all said and done there is usually more said than done
Jackofall1 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
How to calculate Joist span table for 3x8's WillSTX Building & Construction 22 03-19-2010 04:41 PM
Center bearing vs. Clear Span floors -- Span Tables WaldenL Building & Construction 1 10-09-2009 12:24 PM
Building a patio cover...span and size of lumber Q's jongordo8 Building & Construction 1 08-30-2009 12:08 AM
Patio Roof Beam Span slakfu Building & Construction 4 06-03-2009 10:45 PM
Platform across a 9 foot span Hogan-s Carpentry 1 09-19-2008 07:46 AM




Top of Page | View New Posts

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