Designing pit / trench concrete thickness
Designing pit / trench concrete thickness
(OP)
This, I'm sure, is basic stuff but I don't deal with a lot of concrete work so I could use a little help. I've got to put some pits into the ground in a processing plant. The pits are roughly 4'x10' x 4' deep and have vertical walls. We will be having these poured. Is there a design reference that I can use to determine how thick the walls of the pit should be, re-bar centers, re-bar size, etc...? Any help or nudge in the right direction would be appreciated.





RE: Designing pit / trench concrete thickness
RE: Designing pit / trench concrete thickness
However, if you do need cast-in-place concrete for pits, such as pump sumps, here are a couple of things to keep in mind:
1. If there is a high ground water table, use enough concrete in the walls and pit bottom to keep the (empty) pit from "floating" out of the ground.
2. Cast-in-place concrete walls less than 6" thick are difficult to construct (space inside the forms is very limited). Eight inch thick walls (minimum) are much more constructable.
www.SlideRuleEra.net
RE: Designing pit / trench concrete thickness
We have poured a few footings before but no in-ground vaults. These are open on top and won't be holding anything other than the occasional worker. I had planned on going w/ 6" walls and #4 rebar 12" O.C., plus pinning the walls to the existing concrete floor w/ #4 rebar 12" O.C. all around the upper perimiter. I think it should be ok, but 'think' is the key word there.
RE: Designing pit / trench concrete thickness
RE: Designing pit / trench concrete thickness
RE: Designing pit / trench concrete thickness
Dick, this is going into a plant with finished epoxy flooring, I am neat saw cutting the floor to have the cleanest end result that won't require any epoxy work.
RE: Designing pit / trench concrete thickness
RE: Designing pit / trench concrete thickness
RE: Designing pit / trench concrete thickness