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  #1  
Old 8/22/13, 3:44 PM
Michael A. Clark, CMI's Avatar
Michael A. Clark, CMI Michael A. Clark, CMI is offline
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Default Can't Cantilever?

This is a 6 foot cantilevered balcony. Framing is 2x12's, but only protrude into interior 4 feet.

I am pretty sure we can only cantilever 1/3 of joist length, so a 12 foot joist can protrude 4 feet, and these 10 foot joists should only protrude about 3 feet, correct? In order to have a 6 foot cantilever they would need an 18 foot long joist?
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  #2  
Old 8/22/13, 3:49 PM
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Jeffrey R. Pope, CMI Jeffrey R. Pope, CMI is offline
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Default Re: Can't Cantilever?

Accident waiting to happen...



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  #3  
Old 8/22/13, 4:37 PM
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Michael A. Clark, CMI Michael A. Clark, CMI is offline
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Default Re: Can't Cantilever?

Quote:
Originally Posted by jpope View Post
Accident waiting to happen...
my sentiments exactly. I didn't want to seem like an "alarmist", but this was a single 20 something guy who did a lot of entertaining. He could feel the bounce on the inside floor as I walked on the balcony. I removed some drop ceiling panel downstairs and discovered the joists were tied to a triple beam 46" inside the interior, and were nailed instead of lag bolted.

I could just see this thing collapsing if you got 12 or so people out on it.....




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Old 8/22/13, 5:08 PM
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Default Can't Cantilever?

The guard rails are not supported by posts either and the spacings looks too wide also, all in all looks like poor construction...



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  #5  
Old 8/22/13, 6:01 PM
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Default Re: Can't Cantilever?

I guess you did see how far they went back into the dwelling .. Huh ?





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  #6  
Old 8/22/13, 6:30 PM
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Default Re: Can't Cantilever?

Quote:
Originally Posted by dgrace1 View Post
and the spacings looks too wide also, ...
and not high enough...



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  #7  
Old 8/22/13, 6:34 PM
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Default Re: Can't Cantilever?

Michael - I agree that it is poorly built and unsafe. Good catch for your clients!



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  #8  
Old 8/22/13, 9:00 PM
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Michael A. Clark, CMI Michael A. Clark, CMI is offline
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Default Re: Can't Cantilever?

Thanks, you guys are correct. The railings are 32" high, shaky, and ballusters are about 6" apart. The wood deck below is wood sitting on grade.

Home built in the 30's with a 12" crawlspace, with multiple additions, likely in the 70's, and all apparently done by Harry Homeowner and Jack Daniels.




Michael A Clark, Certified Master Inspector®
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  #9  
Old 8/22/13, 9:04 PM
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Michael A. Clark, CMI Michael A. Clark, CMI is offline
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Default Re: Can't Cantilever?

Quote:
Originally Posted by rlewis5 View Post
I guess you did see how far they went back into the dwelling .. Huh ?
Yeah Roy, as mentioned in the OP about 4 feet.




Michael A Clark, Certified Master Inspector®
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and do it Righter than Right...Always"

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  #10  
Old 8/23/13, 7:09 AM
Joshua L. Frederick Joshua L. Frederick is online now
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Default Re: Can't Cantilever?

Quote:
Originally Posted by mclark2 View Post
a single 20 something guy who did a lot of entertaining.
I could just see this thing collapsing if you got 12 or so people out on it.....
Just tell him no dueling piano contests out there and all's well.... deal killer.
After all, its been that way for 30 yrs. and its o.k.
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