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-   -   Drilling through floor joist (http://www.diychatroom.com/f2/drilling-through-floor-joist-106475/)

 marly 06-03-2011 11:57 AM

Drilling through floor joist

I have a floor joist I want to drill through for some electrical wire. There is already an existing hole drilled for some current wiring that came with the house. The floor joist is a particle board type nailed together. I attached a photo of the joist.

http://www.cobaltfactor.net/photo.JPG

marly

 joed 06-03-2011 12:39 PM

There should be holes in the joist ready to be knocked out with a hammer.

 marly 06-03-2011 12:41 PM

Quote:
 Originally Posted by joed (Post 660473) There should be holes inteh joist ready to be knocked out with a hammer.
I'm not talking about the I-beam floor joists with the knockouts. I'm talking about the one that is nailed together in the picture. It's made out of what looks like partical board.

marly

 marly 06-03-2011 01:22 PM

I guess the correct name for the floor joist is, "Laminated Strand Lumber". There are two of them nailed together.

marly

 Gary in WA 06-03-2011 02:14 PM

Measure the two LVL's, if 1-32/4" each, that is what they are, pp. 23: http://imgs.ebuild.com/xCat/ebuildWe...riant=Original

If they measure 1-1/8" or 1-1/4", they may just be rim boards; http://www.ilevel.com/literature/TJ-4000.pdf (I hope not....)

Gary

 marly 06-03-2011 02:28 PM

Quote:
 Originally Posted by GBR in WA (Post 660521) Measure the two LVL's, if 1-32/4" each, that is what they are, pp. 23: http://imgs.ebuild.com/xCat/ebuildWe...riant=Original If they measure 1-1/8" or 1-1/4", they may just be rim boards; http://www.ilevel.com/literature/TJ-4000.pdf (I hope not....) Gary
They measure 1-3/4" (assume you meant 1-3/4 instead of 1-32/4"). They'are also used exactly how they're used in the picture on pp. 23 in the link you gave. They're buit around the stairs going into the basement.

I also have another joist similar that measure 3-1/2" that's labeled iLevel Truss Joist.

marly

 Gary in WA 06-03-2011 02:37 PM

Correct, I usually spell check myself, but have been sick at home today. That is my excuse and I'm sticking by it.... LOL.

Follow the guide or find the U.S. version on-line.....

Gary

 marly 06-03-2011 02:44 PM

Quote:
 Originally Posted by GBR in WA (Post 660535) Correct, I usually spell check myself, but have been sick at home today. That is my excuse and I'm sticking by it.... LOL. Follow the guide or find the U.S. version on-line..... Gary
I attached another picture. I found on the back side it says, "Trus Joist" and it also says "hole zone". I assume that's where it's ok to drill.

http://www.cobaltfactor.net/holezone.JPG

 Gary in WA 06-03-2011 03:43 PM

Just follow the picture guides as they appear the same: http://www.ilevel.com/literature/TB-209.pdf

http://cmfac.groups.et.byu.net/tharm...ng%20guide.pdf