Driveway angle
Melting Slicks
Joined: Jul 2007
Posts: 2,027
Likes: 0
From: The Lost Borough, NYC
Mine isnt very steep but it will scrape and i'd rather not have that at all. Why should I have to be stressed everytime I take the car out and in? And going majorly slow doing it is a solution but what if I am a bit of a rush and need to get inside or out a bit quickly?
Here is a quick diagram (please dont laugh I did this in MS paint really quick), lol. The picture should be self explanatory! My other alternative was to build a ramp instead of using cement. The only problem was i'd have to keep putting it there and taking it away every time I need to use the car, pain in the a$$ if you ask me. I am still looking into the feasiblity of this project and wont take long nor that much money to do.
NOTE:The redline indicates where the cement will be added! Hope this may help anyone else with this type of problem!
Here is a quick diagram (please dont laugh I did this in MS paint really quick), lol. The picture should be self explanatory! My other alternative was to build a ramp instead of using cement. The only problem was i'd have to keep putting it there and taking it away every time I need to use the car, pain in the a$$ if you ask me. I am still looking into the feasiblity of this project and wont take long nor that much money to do.
NOTE:The redline indicates where the cement will be added! Hope this may help anyone else with this type of problem!
Last edited by pTr73; Oct 15, 2007 at 12:40 AM.
Thread Starter
Racer
Joined: Apr 2007
Posts: 385
Likes: 0
From: TABLE ROCK LAKE MO
Thanks
[QUOTE=FortMorganAl;1562300841]I know this might be hard to believe but I actually made these calculations as part of a summer job 35 years ago. I was working city engineering and had to design a driveway for a house not quite as bad as the ones pictured but similar.
My stock coupe has about 5.4 inches clearance at the driver's door and 106 inches between the wheels. Draw 2 triangles starting half way between the wheels, 5.4 inches up to the rocker, out to each wheel, and back to the center. Your floor can not break steeper than the hypotenuse of these triangles. In other words, the change can't be more than about 5.4 inches in 53 inches or 1.22 inches per foot. I'd use 1 inch per foot to be very conservative and allow for some speed over the bump and a full weight load.
That's not much so what do you do if you need a steeper angle? Once the back wheel has started on the new slope you can start dropping the front wheel another 1 inch per foot. You are simulating a ball that you are going over.
Worried about the radiator supports and tail pipes going up? That's a similar calculation but a very different solution. That is what these driveways need to worry about. and can be done but the driveway looks real strange.[/QUOT
That is what I needed, didn't want to get driveway poured then find out I couldn't get the car in....Thanks Bob
My stock coupe has about 5.4 inches clearance at the driver's door and 106 inches between the wheels. Draw 2 triangles starting half way between the wheels, 5.4 inches up to the rocker, out to each wheel, and back to the center. Your floor can not break steeper than the hypotenuse of these triangles. In other words, the change can't be more than about 5.4 inches in 53 inches or 1.22 inches per foot. I'd use 1 inch per foot to be very conservative and allow for some speed over the bump and a full weight load.
That's not much so what do you do if you need a steeper angle? Once the back wheel has started on the new slope you can start dropping the front wheel another 1 inch per foot. You are simulating a ball that you are going over.
Worried about the radiator supports and tail pipes going up? That's a similar calculation but a very different solution. That is what these driveways need to worry about. and can be done but the driveway looks real strange.[/QUOT
That is what I needed, didn't want to get driveway poured then find out I couldn't get the car in....Thanks Bob
