Drilling holes in floor joist?

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#1

Originally Posted By: David Brown
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Hello everyone,Im new to the bb,and the home inspection industury.I hope to become a member next week.Im still studying to become a home inspector.I was watching a tv show ,and they were installing radiant heat in a house that was under constrction.I noticed that they had drilled holes in most of the floor joist,to run the plastic piping.Im not sure what size the floor joist were,but I thought that would weaken the floor.Am I right,or wrong on this?

#2

Originally Posted By: gbeaumont
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Hi David,


yes you are quite correct about, drilling and notching weakening joists, in fact where, and by how much joists can be drilled is regulated, I don't know where you are located, as there are slightly different regulations in place in Canada, but here is a diagram that may help you.

![](upload://pkuOUtpFflclosGnvJn0bXUcctT.gif)

you can check out the rest of this series at:

http://www.nachi.org/toc-tips.htm

Regards

Gerry

--
Gerry Beaumont
NACHI Education Committee
e-mail : education@nachi.org
NACHI phone 484-429-5466

Inspection Depot Education
gbeaumont@inspectiondepot.com

"Education is a journey, not a destination"

#3

Originally Posted By: rmoore
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LOL Gerry…


There I was typing out the info and you go and cheat by posting a diagram.

--
Richard Moore
Rest Assured Inspection Services
Seattle, WA
www.rainspect.com

#4

Originally Posted By: gbeaumont
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Hi Richard,


it's the old saying, "a picture is worth a thousand words"............. and also a lot quicker ![icon_lol.gif](upload://zEgbBCXRskkCTwEux7Bi20ZySza.gif) ![icon_lol.gif](upload://zEgbBCXRskkCTwEux7Bi20ZySza.gif) ![icon_lol.gif](upload://zEgbBCXRskkCTwEux7Bi20ZySza.gif) ![icon_lol.gif](upload://zEgbBCXRskkCTwEux7Bi20ZySza.gif)

Regards

Gerry

--
Gerry Beaumont
NACHI Education Committee
e-mail : education@nachi.org
NACHI phone 484-429-5466

Inspection Depot Education
gbeaumont@inspectiondepot.com

"Education is a journey, not a destination"

#5

Originally Posted By: jpope
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If it is new construction, it’s likely that they were using this type of system. “Hole friendly.” icon_lol.gif




--
Jeff Pope
JPI Home Inspection Service
"At JPI, we'll help you look better"
(661) 212-0738

#6

Originally Posted By: roconnor
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–
Robert O’Connor, PE


Eagle Engineering ?


Eagle Eye Inspections ?


NACHI Education Committee


I am absolutely amazed sometimes by how much thought goes into doing things wrong
#7

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


Thanks everyone for the info.Looks like I have some more studying to do!lol

#8

Originally Posted By: Guest
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What if you’d like to drill a hole in the joist going along the length of the cement foundation? Dryer vents for example. Is this ever allowed?

#9

Originally Posted By: roconnor
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The same rules apply … that is sometimes (my preference) called a “Rim Joist”.

–
Robert O’Connor, PE


Eagle Engineering ?


Eagle Eye Inspections ?


NACHI Education Committee


I am absolutely amazed sometimes by how much thought goes into doing things wrong