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Old 02-05-2011, 08:03 AM   #1
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How would you support pipe in existing joist space?


I'm building out a brand new bathroom. Running the plumbing parallel to the joist space. So I've cut up some floor and know I need to support the pipe every 48 inches. Just wondering how. 2x4 blocking? steel wire? straps? What can I attach the supports to? This needs to pass inspection.

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Old 02-05-2011, 08:14 AM   #2
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How would you support pipe in existing joist space?


I use band iron or hanging strap. Thin metal strapping with holes every 1/2 inch. You can go from one joist to another to make like a saddle to hold the pipe up.

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Old 02-05-2011, 08:18 AM   #3
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How would you support pipe in existing joist space?


Is that code ok? I wonder about the metal strap cutting away at the pipe? Do you need to attach the pipe to the strap or can it just rest on there?

Thanks.
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Old 02-05-2011, 08:27 AM   #4
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How would you support pipe in existing joist space?


it can just rest there
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Old 02-05-2011, 08:46 AM   #5
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How would you support pipe in existing joist space?


Thanks. You wouldn't happen to know how a tub/shower combo drain should attache to the joists. Do I need some kind of solid attachment method?
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Old 02-05-2011, 09:03 AM   #6
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How would you support pipe in existing joist space?


the tub and shower drain attaches pretty solidly to the tub and shower, so I do not worry about putting a hanger on the p-trap, I just put one close on the pipe leaving the trap.
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Old 02-05-2011, 09:28 AM   #7
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How would you support pipe in existing joist space?


are you talking about drainage pipe or water pipe? you can hang abs/pvc with p tape (2 hole strap) but you don't want to do it with pex or copper tubing. for water lines you want to get the appropriate pre made hanger
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Old 02-05-2011, 12:04 PM   #8
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How would you support pipe in existing joist space?


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are you talking about drainage pipe or water pipe? you can hang abs/pvc with p tape (2 hole strap) but you don't want to do it with pex or copper tubing. for water lines you want to get the appropriate pre made hanger
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Definitely use appropriate hanger for pex or copper water lines. Either can deteriorate if hanger/supports are made out of an incompatible material.
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Old 02-05-2011, 02:31 PM   #9
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How would you support pipe in existing joist space?


ABS 3" pipe. What's p tape?
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Old 02-05-2011, 04:18 PM   #10
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How would you support pipe in existing joist space?


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ABS 3" pipe. What's p tape?
any box store should have it
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Old 02-05-2011, 07:00 PM   #11
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How would you support pipe in existing joist space?


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any box store should have it

I asked at Mailboxes etc. and they did not have any

I am sorry, I just could not help myself.
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Old 02-05-2011, 07:16 PM   #12
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How would you support pipe in existing joist space?


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I asked at Mailboxes etc. and they did not have any

I am sorry, I just could not help myself.
You should have picked up some strapping tape though. It's good stuff
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Old 02-06-2011, 02:49 AM   #13
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How would you support pipe in existing joist space?


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any box store should have it
if youre hanging plastic pipe use the plastic plumbers strap,metal will cut into plastic pipe.
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Old 02-06-2011, 08:24 AM   #14
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How would you support pipe in existing joist space?


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if youre hanging plastic pipe use the plastic plumbers strap,metal will cut into plastic pipe.
That's exactly what I mentioned above. Do they sell plastic at the box stores?
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Old 02-06-2011, 08:38 AM   #15
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How would you support pipe in existing joist space?


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I use band iron or hanging strap. Thin metal strapping with holes every 1/2 inch. You can go from one joist to another to make like a saddle to hold the pipe up.
A saddle should be V shaped. A straight (horizontal) saddle is more apt to spoil the down pitch of the drain pipe if it loosens and sags. And it takes less vibration to loosen up a straight saddle compared with a V saddle.

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