Yep, what gbam said...know your DOT Standard Specs. Here in Florida, it is normal practice for Contractors to construct the pipe bedding with a layer of clean fill dirt (for draining purposes). If there is constant water table issues than small bedding stone is used and typically wrapped in...
Why don't you just go with a precast manhole? All you have to do is get the pipe inverts that connect to it and have the shop drawings reflect those inverts. I guess you could design your own but why. Look up the design standards for your state and go from there. It's quite simple. the most...
Thats a tough one . However , if you have sprinklers , you may have a broken irrigation line runnung under you slab .
I have seen where a home is under construction and before
the driveway was poured , irrigation contractors laid a line across and buiried them and the slab was poured right on...