Replies

1. 
   alwaysoverbudget | Sep 21, 2009 07:09am | #1

   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

1. 
   cameraman | Sep 21, 2009 05:51pm | #3

   That sounds like the best bit of advise that I have heard on this forum!!!!

    

   I second it!!!!

2. 
   jonblakemore | Sep 21, 2009 10:32pm | #9

   Do they have a maximum number or just a minimum requirement? 

   Jon Blakemore RappahannockINC.com Fredericksburg, VA

1. 
   alwaysoverbudget | Sep 22, 2009 02:03am | #13

   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

2. 
   whitedogstr8leg | Sep 21, 2009 08:05am | #2

    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.  

   " Although I have the right to remain stupid, I try not to abuse that right"
1. 
   jonblakemore | Sep 21, 2009 10:33pm | #10

   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

1. 
   Gene_Davis | Sep 21, 2009 11:47pm | #12

   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

1. 
   jonblakemore | Sep 22, 2009 04:37am | #14

   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

1. 
   Gene_Davis | Sep 22, 2009 04:53am | #15

   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

2. 
   jonblakemore | Sep 22, 2009 05:28am | #16

   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

3. 
   brownbagg | Sep 21, 2009 05:53pm | #4

   nope
1. 
   frammer52 | Sep 21, 2009 06:10pm | #5

   That might be a little steep!>G<

2. 
   cameraman | Sep 21, 2009 08:49pm | #7

   Is that for real????????

    

   I've seen it posted before, but thought it was a joke!

1. 
   Dam_inspector | Sep 21, 2009 11:39pm | #11

   I think it is real. It's in Manor Twp near Lancaster PA.

3. 
   jimAKAblue | Sep 21, 2009 08:51pm | #8

   I love that picture!

4. 
   popawheelie | Sep 21, 2009 06:54pm | #6

   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.

    

   "There are three kinds of men: The one that learns by reading, the few who learn by observation and the rest of them have to pee on the electric fence for themselves."
   Will Rogers

   
   

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   Edited 9/21/2009 11:55 am by popawheelie