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-   -   Question about ceiling joists... (http://www.diychatroom.com/f19/question-about-ceiling-joists-1420/)

StlJoe 12-05-2005 04:26 PM

Question about ceiling joists...
 
The short question is will 2x4 ceiling joists, 16" OC, 11' span support anything other than a drywall ceiling. This was a garage that didn't have a ceiling and was remodeled into a living space. I've seen the span tables and see that this is about the acceptable span, but don't know how much weight they will hold, i.e. will I fall through the ceiling if I try to go up there and change something. If so, is there anything I can do to strengthen it up?

Thanks

K2eoj 12-05-2005 06:20 PM

There are probably a few thing that could be done but a little few more datails would be required. Width of the garage. Size of the rafters. How finished is it? HS.

StlJoe 12-05-2005 11:30 PM

Quote:

Originally Posted by hammerslammer
There are probably a few thing that could be done but a little few more datails would be required. Width of the garage. Size of the rafters. How finished is it? HS.

The garage/room is 11' wide. The 2x4's are resting on a load-bearing wall on one side and the outside wall of the house on the other side. The garage did not have any ceiling before and opened up directly into the attic. Hope that makes sense...

'Andyman 12-06-2005 09:47 AM

Celing Joists
 
StlJoe,

Your ceiling joists do meet code for the support of a drywall ceiling and that's all. Will you fall through if you went up? No, but if you are a reasonably big guy and stood on a 2x4 at mid span, you would get excessive deflection in the ceiling. Unless these 2x4's are the bottom chord of a truss and not just joists. If they are just joists, don't even use the space for storage as the code calls for a design live load of 20 lbs/sq.ft and a dead load of 5 lbs/sq.ft. for attic storage space. The 11'-0" span @ 16" o.c. doesn't meet this requirement. Hope this helps.

K2eoj 12-06-2005 10:44 AM

StlJoe,
If your serious about reinforcing your space it can be done by modifying your existing structure into trusses and girder trusses. For a minimal fee I could do the design and have them stamped by a Professional Engineer from my state. I would need detailed drawings from you. PM me if you might be interested. HS.

StlJoe 12-06-2005 11:52 AM

Thanks...
 
Quote:

Originally Posted by 'Andyman
StlJoe,

Your ceiling joists do meet code for the support of a drywall ceiling and that's all. Will you fall through if you went up? No, but if you are a reasonably big guy and stood on a 2x4 at mid span, you would get excessive deflection in the ceiling. Unless these 2x4's are the bottom chord of a truss and not just joists. If they are just joists, don't even use the space for storage as the code calls for a design live load of 20 lbs/sq.ft and a dead load of 5 lbs/sq.ft. for attic storage space. The 11'-0" span @ 16" o.c. doesn't meet this requirement. Hope this helps.

Thanks for the response, that's exactly what I needed to know!!

You guys have a great forum here... I wish I'd found it sooner!!


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