floor truss

Old 09-15-03, 02:44 PM
Thread Starter
Join Date: Nov 2001
Location: Minnesota
Posts: 208
Upvotes: 0
Received 0 Upvotes on 0 Posts
floor truss

Can holes be drilled through the bottom of floor trusses for the purpose of running wire? I have a situation where it would save my a lot of time (and energy) if I could. I have a wall built directly underneath which would help with support. Doing some searches it seems like code talks about notches that are allowed, but reading further says nothing can be done to engineered trusses, which I think I have. A pic can be seen here:
You will see the subfloor above the truss and then the wall underneath.
I have been trying to get ahold of inspec to confirm whether or not I can. I would appreciate any help.
Old 09-15-03, 09:23 PM
bungalow jeff
Visiting Guest
Posts: n/a
While my gut reaction says don't do it, you should check with the truss manufacturer to see if there are acceptable hole sizes and locations.
Old 09-15-03, 10:17 PM
Doug Aleshire's Avatar
Join Date: Feb 2002
Location: United States
Posts: 4,455
Upvotes: 0
Received 0 Upvotes on 0 Posts

I would think that a 1/2" hole would be considered ok but I would strongly suggest geting the proper OK from the Building Inspector.

What you have read is true but as this looks as though it is directly under the truss, and if it is installed to carry the load, if it had too, then I think the occassional hole would be acceptable. You may want to apply metal strapping to ensure that the wall below will not be moved at all to satisfy the inspector and ensure that the wall below is solid and touching the floor joist.

Hope this helps and let us know what you found out.

Thread Tools
Search this Thread
Ask a Question
Question Title:
Your question will be posted in: