Floor Joist knotching

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1

Originally Posted By: jbrown2
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I reciently inspected a home and found the floor joist were knotched for pvc drain pipe. The knotch was close to 50% and cut from the bottom with no straps closing the knotch.


Q. what is the % of knotching for this application.

2

Originally Posted By: lkage
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James, 50% is too much cut out straps or not.


Look here:

http://www.codecheck.com/pg03_04building.html

3

Originally Posted By: jbrown2
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Thanks Larry, Also thanks for the link to the code check. I have the books however they are not the “West Coast” ones and it is not nearly as detailed.

4

Originally Posted By: jbrown2
This post was automatically imported from our archived forum.


One more thing Larry, would you send me the links of the Code Check for Plumbing, Electrical, and HVAC? I appreciate it.

5

Originally Posted By: lkage
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James, I just “googled” what I was looking for, otherwise I just have the books. icon_wink.gif

6

Originally Posted By: ccoombs
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Per Section 2320.8.3 of the UBC/CBC and Section 4.4.3 of the NDS, a conventional joist can have a notch on the top or bottom if: the depth is no more than D/6 and the width is no more than L/13. The notch also can not occur within the middle 1/3rd of the span.


I believe the NDS standards apply to the entire nation, so I believe this is good for your area.