Pitch for concrete pad dilemma

[ctcamper]

Guy is coming to form it out this afternoon and pour tomorrow.


Asphalt drive ripped up now and I am pouring a pad for the MH and then the paver will come and pave and ramp up to the pad.

Pad will be 10'2" from foundation to grass, and 30 feet from back to front. 20 feet of the pad will be next to the garage... 10 sticking out forward into the sloped driveway area ( probable 2-3 feet of drop for 40 feet of driveway) so they will have to build up the front area a few inches. Right now I have to add about a four inch mound of stone/wood block to the front of the motorhome and then hit the hydraulic levelers so the front wheels will not come off the ground. If I don't block it the wheels pick up off the ground.


Concrete guy wants to do a 1/4 inch per foot front ot back which would be approx a 4.75 inch drop over the MH's wheelbase.

I an trying to decide if an 1/8 inch pitch front to back would be ok, I think the MH sits lower in front as is without the jacks. I want to be able to pull in and be fairly level without the jacks so I can use it for spare sleeping quarters and also leave the refrigerator on all the time.



I am thinking I'd be better off giving it an 1/8pitch or mabe 2 inch total toward the grass over the 10 feet so the water will tend to flow into the grass away from the foundation/garage area

I had puddling before on the asphalt that was there before and it was no big deal as the puddles dried up in a couple days after rain.

One of the other contractors that estimated the job said the water will puddle and run off as it's up top of a slope so he didn't seem to think the pitch was really necessary. It's not like it always rains here anyway.. just this year lol

[Cruzer]

1/4" pitch is standard but you don't need it in both directions. I would simply pitch it 1/4" per foot over the width and leave the length alone. That will also help keep the water away from your building foundation.

If you did need to pitch it lengthwise I would raise the middle, rather than one end. Place the raised portion beneath the center of your motorhome so that both sets of leveling jacks are at the same height so that you don't have to jack one end up excessively.

If you minimize the pitch to 1/8" you could be left with standing water, especially if you're in a climate that encounters frost heaves during winter.

[dogpatch]

I'm a general conctractor. I agree with Mark.

[ctcamper]

Guys came and are doing it side to side, the old timer said that is what I should have... no need to pitch forward. They are going to dig me a trench where the rear wheels sit on the grass edge
( I will be parking with the wheels very close to the edge ) so I can have 11 feet long area that is 10 inches deep of concrete there. One guy didn't think it would go anywhere with the 5 inch pour but the boss said to make me happy

[38 Special]

How about crowning it slightly in the middle front to back, like a road.

[ctcamper]

On the garage side I have 6 inches from bottom of siding to base now. so they will pour up close to edge and angle it from there to 5 on the outside.

I guess I have to wait a week or so before I can park on it. I'll have to take a vacation hehe .

[Pusherman]

Quote:

Originally Posted by Cruzer 1/4" pitch is standard but you don't need it in both directions. I would simply pitch it 1/4" per foot over the width and leave the length alone. That will also help keep the water away from your building foundation.

Ditto. Pitch it away from your garage to keep the water from running back to the building. Since it's side-to-side, the total pitch won't be much. If you really need to, you can use your leveling jacks to bring your MH back to level, and it won't take much.

[ctcamper]

Guy is going to do the side to side.
One of them said the concrete will be 9000 psi in a month?? I seriously doubt they are getting that high of a psi for this job.. they are doing two jobs with one truck load .. Mine at 9 am and then the town over.

[ctcamper]

Ended up with 6 yds 5.75 inches in the back and 10 in the front.. They poured 4K psi with fiber. Was a stiff pour so they earned their money
Pitch had to go 3 inches over the 30 feet so very slight. Also did the inch side to side. Had to do pitch that way at least for the 3 inches as I ended up with that end 10 inches above the grade of the rest of the drive..so they will bring in process to ramp up before paving.
Small world that it is, I use to work the same job site as this contractors father. Father son team that did the pour were good. I have worked with many of the people they have also many years ago so we had fun chatting about it all. LOL here I was worried about who I was going to get and how good they were and I end up with some top notch guys.
Guy that did the most work was old school italian.. very proud of his work and not willing to do a mediocre job. Pride in your work is so rare nowadays.

Thanks everyone for the helpful suggestions .. first RV pad I have ever been involved with,and help from all who have been there done that is great!!