Forums | Home Repair | Home Improvement | Painting | Interior Decorating | Remodeling | Landscaping


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 05-20-2010, 02:50 PM   #1
Member
 
Join Date: Oct 2009
Location: Indiana, PA
Posts: 1,273
Share |
Default

Should there have been a beam?


My garage's attic is 2x10's and they are 27 ft long! with no support in the middle... should the builder have put a beam down the center at least? any problems with how it is? the drywall that is on the ceiling is starting to crack at all the joints and there is no load on it at all right now... but it is an attic space..... so it could potentially have a load
BlueBSH is offline   Reply With Quote
Old 05-20-2010, 03:28 PM   #2
Newbie
 
Join Date: May 2010
Location: Jacksonville, FL
Posts: 28
Default

Should there have been a beam?


They have the boards running 27' unsupported? I'm no expert but that doesn't seem right, especially if it is supposed to be an attic. They aren't trusses?
acme54321 is offline   Reply With Quote
Old 05-20-2010, 03:32 PM   #3
Member
 
Join Date: Oct 2009
Location: Indiana, PA
Posts: 1,273
Default

Should there have been a beam?


Quote:
Originally Posted by acme54321 View Post
They have the boards running 27' unsupported? I'm no expert but that doesn't seem right, especially if it is supposed to be an attic. They aren't trusses?
Rafters.... the only support they have is about half way they have a vertical board from the joist to the roof joists to tie them together in the middle... besides that its only supported on both ends and its a 27 ft span with a 8 / 12 roof pitch
BlueBSH is offline   Reply With Quote
Old 05-20-2010, 03:46 PM   #4
Civil Engineer
 
Join Date: Mar 2009
Location: Boston
Posts: 3,973
Default

Should there have been a beam?


Are you talking about joists that span horizontally at floor level between the walls, or the rafters?
Daniel Holzman is offline   Reply With Quote
Old 05-20-2010, 05:11 PM   #5
Member
 
Join Date: Nov 2009
Location: central virginia mountains
Posts: 1,857
Default

Should there have been a beam?


sounds like ceiling joists
__________________
The older I get the better I was
tpolk is offline   Reply With Quote
Old 05-20-2010, 05:16 PM   #6
Member
 
Join Date: Jan 2009
Location: South of Boston, MA
Posts: 17,248
Default

Should there have been a beam?


Picture ?
Scuba_Dave is offline   Reply With Quote
Old 05-21-2010, 07:12 AM   #7
Member
 
Join Date: Oct 2009
Location: Indiana, PA
Posts: 1,273
Default

Should there have been a beam?


I have what is probably called a "common rafter" system.... the ceiling joists are a 27 ft span (no support in the middle) made of 2x10's then I have the rafters going up at a 8/12 pitch with collar ties at the top... but then from the collar tie down on one side they have a piece of 1x4 nailed from the collar tie and then it goes down vertically and attaches to the ceiling joist and that is the only support near the middle there is..
BlueBSH is offline   Reply With Quote
Old 05-21-2010, 08:54 AM   #8
Member
 
Join Date: Jul 2008
Location: NW of D.C.
Posts: 5,990
Default

Should there have been a beam?


Quote:
Originally Posted by BlueBSH View Post
the drywall that is on the ceiling is starting to crack at all the joints and there is no load on it at all right now
How much sag do you have at midspan? L/180 would give you ~4".
Yoyizit is offline   Reply With Quote
Old 05-21-2010, 08:56 AM   #9
Member
 
Join Date: Oct 2009
Location: Indiana, PA
Posts: 1,273
Default

Should there have been a beam?


Quote:
Originally Posted by Yoyizit View Post
How much sag do you have at midspan? L/180 would give you ~4".
not exactly sure how to check the sag, but the measurements from the ground to the ceiling joists there is virtualy no difference in height with no load on the joists
BlueBSH is offline   Reply With Quote
Old 05-21-2010, 09:07 AM   #10
Member
 
Join Date: Jul 2008
Location: NW of D.C.
Posts: 5,990
Default

Should there have been a beam?


Quote:
Originally Posted by BlueBSH View Post
not exactly sure how to check the sag, but the measurements from the ground to the ceiling joists there is virtualy no difference in height with no load on the joists
You could stretch a line. If the line hits each wall 4" below the ceiling at each end while grazing the ceiling at midspan then you have 4" of sag.

Last edited by Yoyizit; 05-21-2010 at 09:11 AM.
Yoyizit is offline   Reply With Quote
Old 05-21-2010, 10:10 AM   #11
Civil Engineer
 
Join Date: Mar 2009
Location: Boston
Posts: 3,973
Default

Should there have been a beam?


I doubt the structure met code when it was built, unless it was pre building code, but that may be of no interest to you. The 2x10 ceiling joists are structurally adequate to hold the walls together, however they are not adequate to support more than a nominal floor load. From your description, there is nothing in the attic, so the joists are unloaded, which is why they have not collapsed or sagged.

I am still unclear what the dimensions are of the rafters. It sounds like you have a 1x4 vertical support part way up the rafters, but a photo would be very nice. As you are in PA, snow load would be an important component of the total load on the roof, and the rafters could be overspanned.
Daniel Holzman is offline   Reply With Quote
Old 05-21-2010, 11:54 AM   #12
Next Time...New Build
 
Join Date: Nov 2009
Location: Buffalo, NY
Posts: 192
Default

Should there have been a beam?


Is there a strongback running down the middle?

Strongback consisting of 2x4 on the horizontal with a 2x4 nailed on the vertical next to it, nailed perpendicular to the joists? I have seen that quite often on longer spans.
RickyBobby is offline   Reply With Quote
Old 05-21-2010, 01:51 PM   #13
Member
 
Join Date: Oct 2009
Location: Indiana, PA
Posts: 1,273
Default

Should there have been a beam?


Quote:
Originally Posted by RickyBobby View Post
Is there a strongback running down the middle?

Strongback consisting of 2x4 on the horizontal with a 2x4 nailed on the vertical next to it, nailed perpendicular to the joists? I have seen that quite often on longer spans.
nope, just 2x10's horizontal, and a 1x4 vertical to the collar tie
BlueBSH is offline   Reply With Quote
Old 05-22-2010, 08:36 PM   #14
Member
 
Join Date: Oct 2009
Location: Indiana, PA
Posts: 1,273
Default

Should there have been a beam?


here's a photo looking down the center of the garage's attic

after looking again there are no collar ties, was thinking of another attic here.....
Attached Thumbnails
Should there have been a beam?-dsc_5008.jpg  
BlueBSH is offline   Reply With Quote
Old 05-23-2010, 12:25 PM   #15
Totally screwed together
 
Join Date: Dec 2006
Location: Cypress, SoCal
Posts: 325
Default

Should there have been a beam?


I suspect those 2x10 are not single boards that are 27' long. If they were, they would cost hundreds of dollars each! Where those boards break, there will be a wall underneith.

Is the space completely open underneith?
xxPaulCPxx 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
Crawl Space Beam and Joist Support Questions Fire4Effect Building & Construction 5 06-28-2009 01:07 PM
replacing beam in basement bpahwa Building & Construction 4 01-12-2009 07:12 PM
Q:Temp support to replace beam and posts on deck dougq Building & Construction 10 09-02-2008 04:24 PM
Beam Replacement? Steve Dailey Carpentry 5 05-19-2008 08:46 PM




Top of Page | View New Posts

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