max. Driveway Slope
max. Driveway Slope
(OP)
I have a Driveway and garage relationship of 46' in angle length and a 9'6" difference in vertical ht. I calculate that this driveway is at about 21-22%. Is this acceptable in California Specifically the Hollywood hills. I am the Architect and the contractor has graded this and they are ready to pour. The big problem is there is no more horizontal length for us to reduce the slope.It seems visually that many hillside homes have driveways at even steeper grades, but this one is my project and I am wondering if this is an acceptable single family residential condition?
Thank you.
Thank you.





RE: max. Driveway Slope
RE: max. Driveway Slope
RE: max. Driveway Slope
RE: max. Driveway Slope
If not a basement, you could reduce the slope by some excavation and some retaining walls. The difference would need to be made up with a staircase or terraced walk, but those can be design elements.
Just wondering, was it the floorplan/zoning/architect/owner that ruled out the alternatives to a steep driveway?
RE: max. Driveway Slope
http://www.ci.manhattan-beach.ca.us/commdev/handouts/building/driveslope.htm
http://www.rurdev.usda.gov/ga/slope.htm
RE: max. Driveway Slope
Generally you are going to consider cure radius and grade beak situations, i.e. preventing the cars from bottoming out. It is not unusal in LA/Malibu/Hollywood Hills for driveways at 20 percent.
Good Luck.
RE: max. Driveway Slope
You certainly need an engineer with some roadway/driveway layout experience. This is the type of thing that is so difficult yet so under-appreciated. Find a good civil engineer.
RE: max. Driveway Slope
RE: max. Driveway Slope
www.hawsedc.com/gnu
Tom Haws
RE: max. Driveway Slope