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Old 12-12-2007, 02:14 PM  
rlc2052
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Default Open Joist. Is this safe??

I was inspecting my house to see what kind of load bearing my floors could take. I have an open joist system that uses 11.75" joists with 24" in-between them. When building the house, the contractor connected the joist to the wall by cutting back the bottom 2X4 so that it does not connect to the cinder block wall. Only the top 2X4 goes into the cinder block.
How bad is this, and how can I support this better?

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Old 12-12-2007, 02:40 PM  
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Wow!

That is one seriously butchered joist, and you say they are all like that??? You're right, that lower part of the joist needs to be supported. Off the top of my head I'd think maybe using steel brackets under the joist and attached to the cinder block with tapcons or other sort of anchors.

Give it some time here and see what others have to say. I'm guessing you'll get plenty of ideas from other members, not to mention plenty of s.


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Old 12-12-2007, 05:58 PM  
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Thanks ToolGuy.
Yeah they are all like this, and it is a 3 story townhouse. This is the only exposed part that is behind the fire place. The rest is behind sheet rock.
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Old 12-12-2007, 06:05 PM  
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Did you buy the house new? I'm wondering because the builder may be liable for the repair.
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Old 12-12-2007, 06:36 PM  
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No, it is about 15 years old. I bought it about 3 months ago.
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Old 12-12-2007, 07:03 PM  
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Default Guy's

Slow down there speedy...
Those look like top loaded truss joists...old style. These are just fine. The weight is on the top cord,and the metal part in between is the cross section web. No support is needed under the bottom. In fact if you support the bottom you CHANGE the engineered truss. This is typical of townhouses.
If you have any doubt, contact a structural engineer and they will tell you the same thing.
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Old 12-12-2007, 08:31 PM  
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Thanks Inspector D
This seems like it will really affect the load bearing capacity of my floors though. Do you have any idea of what psf load these could take? I can only find load bearing formulas for newer joists that connect at the bottom.
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Old 12-13-2007, 12:30 AM  
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Oopsie, hope you didn't rip out those walls yet.
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Old 12-14-2007, 08:29 PM  
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Default Hi rlc

Your truss capacity is fine, If you want to you can ask the local building dept if they still have your building on record for the PSF loads.
Then you can see from your dept what the capacities are. They are different around the country because of wind, snow, seismic and size of building. If you are over 3 stories tall you follow a separate set of building specifications.
But since the whole development has not fallen down...you should be OK.

And as for you Tool guy.... , We all want to help...that is why we are here, to watch out for each other.
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Old 12-15-2007, 11:58 AM  
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I just realized how much that smiley looks a lot like me.


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