I need to run refrigerant tubing through floor/ceiling
joists- 2×10. I need to drill a 1 3/4″ hole. Do I need to
reinforce the joists, if so, what would be the best way of
doing so?
Discussion Forum
Discussion Forum
Up Next
Video Shorts
Featured Story
This spray-foam sealant from Great Stuff offers mess-free, 6-in. coverage.
Featured Video
SawStop's Portable Tablesaw is Bigger and Better Than BeforeHighlights
"I have learned so much thanks to the searchable articles on the FHB website. I can confidently say that I expect to be a life-long subscriber." - M.K.
Replies
From the North Carolina State Building Code:
Holes drilled or bored in joists shall not be within 2 in of the top or bottom of joists, and their diameter shall not exceed one-third the depth of the joist.
###
Caveat: No claim that this code applies in your area, nor that it is the whole code without exceptions or additions. Just one example of the wording.
Will these be the only holes in the joists, or do some already exist?
Keep holes centered in joist (top to bottom). If these are the only holes you`ll be fine, unless there`s a whirlpool directly above.
J. D. Reynolds
Home Improvements
"DO IT RIGHT, DO IT ONCE"
These will be the only holes. I am installing new heat-pumps
in a 2-story home, separate systems top and bottom, and don't want
to run lines up to the attic then back to the first floor.
Find out what local Code you under and check there, 2000 IRC (lets not even get into what code is better) states min 2 inches from the top/bottom, and the hole cant be more then 1/3 of the width. However i suggest talking with your local code people. Info might vary.
As a rule (and according to BOCA) you also want to keep your holes out of the center third of the span.
Edited 4/19/2002 11:59:10 PM ET by mike maines
I think this may only apply to traditional (i.e. non-engineered) joists as many of the I-Joist/Beam manufacturers clearly specify that the only place to cut holes is in the center portion of the span.
To the original poster: are these traditional lumber joists or an engineered product?
Excellent point. I need to get used to engineered joists; I don't have a lot of experience with them.