I imagine I should cover them, But don't know with what.
2007-05-01 09:28:37 · 7 answers · asked by haap62 1 in Home & Garden ➔ Maintenance & Repairs
PVC should be "dug in" under the slab base you do not want this "in" the concrete for expansion and contraction reasons concerning the pipe.
Covering with sand or soil will be sufficient.
2007-05-01 11:40:26 · answer #1 · answered by unofornaio 3 · 1⤊ 0⤋
There shouldn't be a problem with concrete covering PVC pipes. What you may have a problem with is if all or most of the footer's bearing surface being on these PVC pipes. If this is the case, you may want to modify one of the following:
1. your footer location to get away from the pipes.
2. The run of PVC pipes, they are pretty easy to cut and reroute.
3. The design of your footer to spread the bearing load over the pipes to the ground on either side of the pipes.
The best thing to do would be to reroute the pipes outside the footer so if you had any trouble with the lines in the future, you would be able to get at them.
2007-05-01 17:40:49 · answer #2 · answered by Jeffrey S 6 · 0⤊ 0⤋
USA Jeffery and Big_Must have good answers. You do not want any kind of pipe in a footing. The purpose of a footing is to transmit all the weight of the building above onto the soil below. Any pipe in a footing will be subjected to that weight. Also, the concrete will form a very tight bond around the PVC, keeping it rigidly in place so that it cannot move - if there is any ground movement, or pipe movement or expansion - CRACK goes the PVC.
If the pipe is already in place and cannot be moved, maybe it can be lowered below the footing, so that you can sleeve it like Big_Must said. Good Luck
2007-05-01 18:35:42 · answer #3 · answered by Dave 5 · 0⤊ 0⤋
While the first two answers actually would both work what I would do is take a larger diameter pvc pipe, split it in half and place them around the existing pipes to form a pipe sleeve. This would keep the concrete from rubbing on the pipes and would allow for expansion and/or settlement.
Most locations do not allow gas pipes to be embedded in concrete so make certain that none of these pipes carry natural gas.
2007-05-01 17:42:16 · answer #4 · answered by big_mustache 6 · 0⤊ 1⤋
Well Haaps, I'll give you my two cents. Get yourself a chase/galvanized pipe the size of all the pipes together and stick them into the chase and in the footing. The concrete doesn't touch the pipes and what is in the main of the bldg is covered with sand & dirt. this allows the pipe to move and you won't have a pressure or freeze problem in the footing areas.
2007-05-01 20:08:06 · answer #5 · answered by ticketoride04 5 · 0⤊ 0⤋
Don't know what state you are in, But you need to call the number sponsored by the Utility companies. they will mark the locations of Utility pipes. Sure would not want you to damage a gas line or electrical & get injured or killed.
Besides It's now the law. You can look up "Before you dig" on you computer & get the number for your state.
2007-05-01 21:13:46 · answer #6 · answered by Anonymous · 0⤊ 0⤋
You could use sand. What you do NOT want is cement contacting the PVC pipe. It will eat a hole in the pipe due to expansion and contraction. Foam pipe insulation may also work.
2007-05-01 17:28:25 · answer #7 · answered by sensible_man 7 · 0⤊ 3⤋