I was trying to keep it simple for the sake of answering the question, but I’m literally a carpenter and drilling solid wood joists is totally fine (at least in Canada) as long as you roughly follow what I said. Maybe I could’ve said “design strength” instead of full strength but again, trying to keep it short and simple.
I’ve worked mostly commercial though so you’ve inspired me to look back in my books to make sure I wasn’t way off base in my recollection.
Thanks that exactly proves my point. As your diagram says. You’re allowed to drill a hole at a max of 1/4 the width of the joist. So even if that’s an 8 inch wide joist the biggest hole you can put in it is 2 inches wide.
That looks like 4" waste pipe. So to drill a hole through a joist for that the joist would need to be 16" inches wide.
So you can’t just drill holes in joists in the “middle that isn’t critical” As I said there are specific rules about where the size of holes you can put in joists because the size and location matters very much to the strength of the joist.
I was trying to keep it simple for the sake of answering the question, but I’m literally a carpenter and drilling solid wood joists is totally fine (at least in Canada) as long as you roughly follow what I said. Maybe I could’ve said “design strength” instead of full strength but again, trying to keep it short and simple.
I’ve worked mostly commercial though so you’ve inspired me to look back in my books to make sure I wasn’t way off base in my recollection.
Damn, you even have a diagram.
Thanks that exactly proves my point. As your diagram says. You’re allowed to drill a hole at a max of 1/4 the width of the joist. So even if that’s an 8 inch wide joist the biggest hole you can put in it is 2 inches wide.
That looks like 4" waste pipe. So to drill a hole through a joist for that the joist would need to be 16" inches wide.
So you can’t just drill holes in joists in the “middle that isn’t critical” As I said there are specific rules about where the size of holes you can put in joists because the size and location matters very much to the strength of the joist.
Ooh. Nice. Thanks for that! No idea when I’ll need that, but I’m sure it will be useful in a future project.