2″D hole in 2X10, 4″ from top, 4’from en
johnnyd
| Posted in Construction Techniques on
To expand on the title:
Need to get through a 2X10 joist which is part of a floor system composed of 2×10 FIR joists 16″ on center covered with 3/4″ Advantech. Joists span 10′. It’s for a DWV pipe, 2″ PVC. Center of hole needs to be 4″ from the top of the joist and 48″ from one end, where the joist is supported by the foundation wall.
OK structurally?
I did read a thread here about what is structurally allowable, but saw enough conflicts and options that I thought I would get as specific as I can to get a quick direct answer.
Thanks in advance for your response and advice.
Edited 2/12/2004 2:41:20 PM ET by johnnyd
Replies
How many joists are you going through, all of them? Why does it call for the hole to be off center? I always thought holes should be drilled through the middle of the joist. Especially a hole that size.
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Building Code - 2002 Edition
2308.8.2 Framing details.
Joists shall be supported laterally at the ends and at each support by solid blocking except where the ends of the joists are nailed to a header, band or rim joist or to an adjoining stud or by other means. Solid blocking shall not be less than 2 inches (51mm) in thickness and the full depth of the joist.
Notches on the ends of joists shall not exceed one-fourth the joist depth. Holes bored in joists shall not be within 2 inches (51 mm) of the top or bottom of the joist, and the diameter of any such hole shall not exceed one-third the depth of the joist. Notches in the top or bottom of joists shall not exceed one-sixth the depth and shall not be located in the middle third of the span.
Joist framing from opposite sides of a beam, girder or partition shall be lapped at least 3 inches (76 mm) or the opposing joists shall be tied together in an approved manner.
Joists framing into the side of a wood girder shall be supported by framing anchors or on ledger strips not less than 2 inches by 2 inches (51 mm by 51 mm).
Edited 2/12/2004 7:09:35 PM ET by RASCONC
Edited 2/12/2004 7:13:49 PM ET by RASCONC
Previous post was supposed to say that the NC code is IBC based.
You are fine with it in the middle of the elevation like that. Normally would be precluded from puttiong it that close to center of span , but 2x10 is overkill for a 10' span anyway so you still have plenty of meat on the bone.
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That's what I thought, so I went ahead and bored through just the one joist to get the pipe in.
Thanks, ALL fot your input.
2" ok... 3" and you would have to double up the joist
2" pipe isn't gonna fit in a 2" hole. It's 2 9/16" holes you need, which is still OK.
Joe H