We have a garage coming up that is detached, so we have no fixed requirements for the finish elevations.
I’m wondering if there are any “rules of thumb” for the maximum slope for a driveway apron? There is some asphalt paving that will be about 3′ from where the garage slab starts. The owner has a Porchse, so we definitely don’t want our slope to be too aggressive or he may scrape.
Any have any advice?
Replies
i'd suggest you borrow the porchse, go out cruise around town and try out different drives. 3-4 days you ought to have it worked out.
here they want a 1/2 per ft min.
the older i get ,
the more people tick me off
That sounds like the best bit of advise that I have heard on this forum!!!!
I second it!!!!
Do they have a maximum number or just a minimum requirement?
Jon Blakemore RappahannockINC.com Fredericksburg, VA
i live in the flat lands of kansas,from the east border to the west we probably have 2' of elevation.lol
i don't know about max. after i read your post again i may of misunderstood. i was thinking the driveway aproach off of the street to the drive. sounds like you are within 3' of the garage with blacktop already.
this really don't help much. i have pretty low car [69 shelby] it goes on a rack with ramps,about a 4" rise in 3'. so front tires are on the rack ,back still on the ground. i don't think it would go at 6" rise.maybe 5. the older i get ,
the more people tick me off
A nice single slope will work, no "humps" the the driveway. Run a stringline between the road and the garage's apron, cut out what you don't need.
The garage has not been built, so there is no existing slab elevation.Since we're starting from scratch (and since we will be punished if we're too high), I'm hoping for the "best case" scenario.
Jon Blakemore RappahannockINC.com Fredericksburg, VA
The front dam on my Boxster is awfully low, and it is quite a ways in front of the tire footprints. I cannot drive in many country driveways if the center hump is more than a few inches tall.
I'll bet you could figure your situation graphically by finding a good profile spec drawing of the particular Porsche model on the web somewhere. Porsche may have it. And as you know, it is the angle of the change from drive to apron, and not the slope of the apron, that counts.
View Image
"A stripe is just as real as a dadgummed flower."
Gene Davis 1920-1985
Gene,That is what the Client has too, a Boxster.I know the simple answer is to make it as minimal as possible, or to measure the Porsche and make determinations from there.I was looking for an all purpose rule of thumb that I could apply to every project as needed. Maybe I'm trying to simplify too much.Gene, on your boxster, would a 3' apron with a total rise of 3" pose a problem? This is coming from asphalt that has a slight slope and will transition to the garage slab which will also have a slight slope. I can't imagine 1/12 being a problem. What do you think?
Jon Blakemore RappahannockINC.com Fredericksburg, VA
You'll be fine, Jon.
It was not as low as I reported. I just came back from the garage, where it measured 5-1/4" right under the middle.
At speed, hitting a sharp rise, the tight suspension might cause it to dive a little, so your client might need to hit the apron at, say, 120+ mph to make it bottom out and scrape. By then, however, it'll be too late to care about some scratches on the dam.
View Image
"A stripe is just as real as a dadgummed flower."
Gene Davis 1920-1985
Thanks for looking at that.Since the garage doors will be 90° from the long axis of the driveway, I will be quite impressed with the handling that our client is able to coax from the Boxster if he can hit the apron at 120. Or at least his bravery for taking the Boxster off road long enough to build up that kind of speed.
Jon Blakemore RappahannockINC.com Fredericksburg, VA
nope
That might be a little steep!>G<
Is that for real????????
I've seen it posted before, but thought it was a joke!
I think it is real. It's in Manor Twp near Lancaster PA.
I love that picture!
When I lived in L.A. there was a new house two doors down that had a heavy slope into the garage.
One of those houses that hangs off the hill.
The new owner bought/had a new Porche and it would high side on the drive.
He had to change the apron so he could get his car in.
He was only in the house for about a year.
Will Rogers
Edited 9/21/2009 11:55 am by popawheelie