Boring Hole in staircase 2x10s


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Old 07-31-16, 11:19 PM
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Boring Hole in staircase 2x10s

Hi All!

I've had great luck with advice on these forums, so i figured why quit now. My latest question is in regards to holes bored in joists. I'm not sure of the correct terminology, but this would be the double 2x10's in the basement, running perpendicular to the floor joists, that support the stringers for the stairs going from the 1st floor to the second floor. (Pictures below are worth 1000 words).

Quick description: The house is a 2 story colonial with 2 stair cases, directly above each other in the center of the house (one leading from the front door to 2nd story, and the other directly beneath leading from the 1st floor to the basement). The first floor landing support "beam" in question is directly over head of the last stair in the basement and run perpendicular with the floor joists.

Basically, what I need to do is run a 14-2 wire through those 2x10s, to add a light to the ceiling of that basement staircase. I'm not sure of how advisable it would be to bore a hole through those 2x10s, even a 5/8" or 3/4" for the one wire.

Thanks in advance.

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Last edited by ray2047; 07-31-16 at 11:30 PM. Reason: Put spacing between the pictures.
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Old 07-31-16, 11:31 PM
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A " hole in the center won't be a problem.

Moved to Electrical forum.
 
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Old 08-01-16, 04:20 AM
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Since you are in a semi-finished state, I don't see why you have to bore a hole from side to side. Is there no other route? As Ray said, however, there is no problem with a 3/4" hole.
 
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Old 08-01-16, 05:11 AM
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If you did it that way how would you cover that header with sheetrock?
 
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Old 08-01-16, 05:15 AM
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Hi, are the fixtures IC rated? they need to where there is insulation around them.
 
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Old 08-01-16, 07:01 AM
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Thanks for the quick replies! I was planning on shimming out the header with 2x4s laid flat against the header, to give a cavity for the wire, and also the ability to Sheetrock over it. I can't figure out another route, since the light is under the stairs going to the second floor, either side has stringers to contend with, so I can't get into the walls. Also, yes, all fixtures are IC rated, thank you.
 
 

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