My bus is currently parked under a shed with a floor that is covered by a thick fiber material to minimize the dirt and moisture. I am planning to pour a concrete slab.

I am thinking about having a service pit that is only 15' to 20' long. I assume this will give plenty of room to service the front or rear by just moving the bus forward over the pit. I searched the forum and can't find any posts on the size of pits that others currently use. I need to know how deep and wide the pit should be. Mine won't be as fancy as Jon's, but I do want it to be functional. I have read some of the "Pit" posts before, but as I said, I cannot find them now. Any suggestions will be appreciated.