Ron: "why are you asking such a question here?" Because I thought I could get a better answer than 1% that is just the way it has to be. And your ADA statement is on my mind also.
Yes it is a concrete drive.
There is no drainage retention on the lot. We drain to the street and at the bottom...
I am constructing 2 buildings with a driveway and parking lot inbetween each building.
I am in Moore Oklahoma.
My buildings are 300' by 60'. My concrete drive and parking spaces are 70' between buildings.
I have a gabled roof on each building I am draining 30' of run off per building or a...