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clayrabbit 01-05-2008 07:42 PM

Ceiling Joist Worries
I purchased a house build in 1978 in Norman, Ok in July 2007. The garage attic is partially floored with 3/4" plywood for storage. While adding additional flooring I noticed the ceiling joist are nothing more than 2x4's. Each joist is 2-2x4 boards that butt up against each other and secured with metal plates on each broad side of the joint. In fact every joint in the entire house's roof are tied together with these plates. These metal plates are very similar to simpson strong-tie mp minding plates (which specifically state are not for load bearing). Rafters, joist and the cross beams between the two are all held in place with these minding plates. Is this structurally sound what soever. How might I correct all of this as this is the only access to the roof for the entire house and the only attic storage space. While I have not explored all of the house's attic it seems the much of the house is supported in this very way by the same 2x4 system. Non of this caught the attention of the inspector when I purchased the house. I was under the impression that ceiling joist must be 2x6's at minimum, is there cause for alarm?

Blake Sanderson

gregzoll 01-05-2008 08:07 PM

It is a Truss roof, and Trusses are always 2x4 with metal ties. Only if the Attic Framing is 2x6, then it would be framed on site.

redline 01-05-2008 08:24 PM

Can you post a photo?

clayrabbit 01-05-2008 09:25 PM

clayrabbit 01-05-2008 09:26 PM

So then a truss roof can support light storage loads?

gregzoll 01-05-2008 09:57 PM

The way that a Roof Truss is designed, is to distribute forces evenly, not at one point.

kiwi54 01-05-2008 10:00 PM

Have you cut up any of that frame I can see here, appears that at least one truss back has been cut? Did you have an inspector actually see what we can see here?

gregzoll 01-05-2008 10:05 PM

Probably by the previous home owner.

ponch37300 01-05-2008 11:26 PM

That one looks like it was cut to make room for a hvac unit in the ceiling, they did run a new 2x4 to the left of it, don't know if that makes it ok since the truss was altered from it's engineered design. Those metal plates are pressed into the trusses at the factory and are fine for trusses. These trusses are designed to support a certain weight. personally i would have used 1/2" plywood for the flooring.

clayrabbit 01-06-2008 04:05 AM

Frame Cuts
There are at least seven areas where the frame has been cut to make room for such: electrical, hvac unit, etc. So I should still have an inspector come look at these alterations? Are truss frames safe to store attic type goods? I've possibly 200-300lbs of goods distributed along the floored areas of the attic.

Thanks everyone for all of the assistance in this matter.

Blake Sanderson

Ron6519 01-06-2008 09:30 AM

You need to have the truss system looked at. It looks to have been seriously compromised. The picture showing a 2x4 butt connection in the floor would eliminate any storage weight put on it(in my opinion). That would be true if the truss system were not hacked up.

ponch37300 01-06-2008 05:07 PM

Trusses use the webbing for the majority of it's support. They transfer the weight to different points. 200-300 hundred pounds isn't a big load in an attic with trusses, as long as their strength wasn't compramised by cutting them or altering them. the weight of the 3/4" plywood up there is what i would be conserned about if you only want to store 200-300 pounds of stuff.

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