building a pit

[johns4104s]

The walls on my pit are 11" thick concrete with 5/8" rebar.

John

[luvrbus]

John, good for you the 11 in walls will take a lot of pressure but i would still want a double mat of the # 6 at least and I would want to know the sack mix if it a 4000# or what.A 3000 or 4000# 11 in wall will not hold as much as 5000 or 6000 # 8 in wall     good luck

[Hi yo silver]

Lots of good advice and sterling intentions here, but my advice as a former fire investigator and building inspector consists of the following four words; "FOLLOW A RECOGNIZED STANDARD".  If there should be an unfortunate incident and your bus is damaged, or worse, the first thing the investigation is likely to address is the standard that was or wasn't met.  This project like most, will be done with less expense if you do it right the first time.  That said, I'm just JEALOUS! 
Good luck.
Dennis

[edroelle]

We built our pit similar to Bottomacher.   Blocks filled with concrete and rerod bent so the floor will help hold the wall.   An architect provided some guidance when we did it.

Ed Roelle

[BG6]

Has anyone made a pit? I have a 12x24 depth 3-6 feet inground pool that is no longer usable. My first thought was to fill in up to 6" and do a concrete slab to put the bird on. After thinking about it I think I can add the pit as well. I am looking for any information or feedback

Call a couple of big semi repair shops, like Freightliner of Utah.  Ask them what the specs are on their pits.

Remember that your coach weighs at least 50% MORE than a semi in the shop, and has fewer tires!

[hturner12]

I thank everyone for their inputs I will update the project as I progress