Hole for Cable TV line...

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Old 04-27-14, 06:18 PM
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Hole for Cable TV line...

I'd like to run a Cable TV line through a wall. The problem is, it will require drilling a hole through the floor joist - vertically (at an angle).

Situation:

The wall is on one side of the stairway leading up the the second floor. There are two joists supporting this wall. Approx 2 feet away, there is a 1.5" diameter hole, drilled at an angle upwards, through the joists, for electrical. Floor joists are 2x8, span of ~12'. The hole I'd be drilling would be 1' away from the center of the house where a steel beam runs, supporting the joist. I'd keep the hole as small as possible, ideally uncrimped cable (to minimize the hole size drilled).


Question:

Can I safely drill (vertically, but at an angle) through the floor joist? I can take pictures if that'd help. The net effect would be a hole in the upper 1" of the top on the side of the joist, exiting through the TOP of the joist.


I'm just a bit nervous about putting more holes in the joists - we started a simple carpet project that turned into a joist replacement, basement ceiling light fixture rewiring, soon-to-be new duct outlets to fix shoddy workmanship kind of project... so I don't want to add to the mess

Thanks!

John
 
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Old 04-27-14, 06:27 PM
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A small hole for just the coax shouldn't present any issues.

I'm trying to picture a hole entering the top side of the joist and exiting out the top. Does it exit into a wall cavity ? You need to make sure where you drill the hole can't be hit from nails from above.
 
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Old 04-27-14, 06:50 PM
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It should - yes. That's how the electrical gets into the wall (existing hole described above). I have some scraps of wood laying around which I can use as a mockup prior to drilling, to make sure the hole will land where I'm expecting it to.

As for nails from above - I don't think that is possible. I drilled a very small hole in the subfloor, and the joist starts exactly where the wall starts. It would be more likely if someone were to put new baseboard molding on - but then they might do the same with the electrical that is already present.
 
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Old 04-27-14, 07:10 PM
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I understand now 100% what you are doing. You should be fine with the hole there.
What you are doing there is very common on outside walls too.

You drilled a small hole in the floor to locate the wall. A tiny finishing nail works good also.
 
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Old 04-27-14, 07:22 PM
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Thanks! Yep - I used the hole to measure the joist location relative to the wall. Now I just need to make one more trip to the hardware store and crack out my stud finder & drywall saw... fun times
 
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