Driveway thickness for RV

[Hawkeye]

fiber good
wire good
rebar on chairs much better, but cost more in material & labor

[szakaluk]

3000 PSI mix, have fiberglass added. 4 or 5 inch depth. I assume you'll put jacks down for storage. p.s. park with tires on plywood or something similar, rather than having the tires on concrete for long periods.

[alpinecpi]

Did my driveway 5 1/2" thick, with #4 rebar at 18" on center. Poured 3500# concrete. Has a few cracks, as concrete nearly always does, but no lifting, or separation. Poured over 3'' of road base.

[Treker Vic]

Originally Posted by Granite17

Our builder is just about ready to start constructing a driveway to support our DS4018. I have told him it needs to handle 50,000 lbs.

Any engineers out there or concrete contractors that can
share specs. to handle this kind of
weight. We live in the Texas Hill Country, very rocky soil conditions.
Interested in thoughts on base,
rerod size, placement and concrete depth?

Appreciate if anyone has experience with this.
Thanks!

The total weight is not the issue. How the weight is distributed is what you need to consider.
Or to put it an other way, What is the maximum load on any one tire that the driveway will need to support?

[shunter6]

Lot of concrete people will tell you that the fibeglas mesh in concrete will
be good enough but I have learned the hard way, redoing about 200 feet
of drive due to weight of Cornerstone. They have been going 8 inches thick
and putting tied steel rebar in it and it is holding up perfect.

If you sub is a good concrete man he will know his strengths and how it
should be done.

[Johnnycb]

6 inch thick @ 3000psi with #3 rebar @ 12"OC (on center) should be enough. I am not an engineer but an inspector and have inspected many a slab for vehicular traffic and most are this size with an occasional 8" depth for 18 wheelers.

I live in Austin, where do you live in the Hill Country?

[TriMoot]

Originally Posted by Mr_D

Yep, rebar needs to be elevated on dobies to be truly effective. We always did on concrete highway sections.

Uhm...Mr. D..when I googled "elevated on dobies" all I got was this?

https://www.pinterest.com/heather945...es-and-dobies/

Do what are dobies in your world?

[coachmanjay]

A few random comments, yes the base is very important along with good drainage. The total weight is not the limiting factor, pressure is, it cannot exceed the highest pressure in your tires, unless you are up on jacks and that has been covered previously. I would not exceed a 3500 psi mix. Concrete gets brittle at higher strengths. Think how glass cracks vs plywood. Concrete cracks and the lower strengths tend to have hairline vs long ones in the high strength mixes. As said fiber does a good job of controlling hairline cracks but is difficult to finish. Mesh or rebar is good to limit cracks due to flexure caused by subgrade settlement.

[gwg35]

Originally Posted by Granite17

Our builder is just about ready to start constructing a driveway to support our DS4018. I have told him it needs to handle 50,000 lbs.

Any engineers out there or concrete contractors that can
share specs. to handle this kind of
weight. We live in the Texas Hill Country, very rocky soil conditions.
Interested in thoughts on base,
rerod size, placement and concrete depth?

Appreciate if anyone has experience with this.
Thanks!

I poured a new drive two years ago, made it 8" thick with rebar every two feet, so far no cracks. I was told that I was doing overkill, but rather that than underkill.

[JD22]

Originally Posted by Granite17

Our builder is just about ready to start constructing a driveway to support our DS4018. I have told him it needs to handle 50,000 lbs.

Any engineers out there or concrete contractors that can
share specs. to handle this kind of
weight. We live in the Texas Hill Country, very rocky soil conditions.
Interested in thoughts on base,
rerod size, placement and concrete depth?

Appreciate if anyone has experience with this.
Thanks!

I just poured a 20X43 with 5" slab and 6" borders approx. a foot wide. With rebar. Coach is still above ground and Lookin' Good !!!

[SERGEANTROCK]

Originally Posted by Granite17

Our builder is just about ready to start constructing a driveway to support our DS4018. I have told him it needs to handle 50,000 lbs.

Any engineers out there or concrete contractors that can
share specs. to handle this kind of
weight. We live in the Texas Hill Country, very rocky soil conditions.
Interested in thoughts on base,
rerod size, placement and concrete depth?

Appreciate if anyone has experience with this.
Thanks!

I had a general contracting company for 48 years. A 4" slab with #4 bars each way at 16" on center with 3000 PSI is just fine. Be sure your sub base is good and compacted.

[Ivylog]

Did 500’ of concrete driveway 10 years ago on clay...No gravel, no rebar, no wire mesh using 3000psi fiber concrete 4” thick except the edges which are 6” for 1’. Saw cut the 10’ wide driveway every 12’ to control were it’s going to crack...no other cracks after 10 years with freezing temperatures.

Motorhome bay much the same but the 6” thick is where the tires run...4’ in on the 16’ wide floor plus a footer along the outside edge. Agree RVer have more time and money than sense with 8” 5000 psi and rebar 12” O C. Maybe I missed where they were building a valt for all their money...not a driveway. Should have known they did not need a valt after spending that much on a driveway.

PS: max pressure in a MH tire is 120 psi or less.

[wkm01]

Trying not to replace the full length of my driveway. What about driving across an existing 4" thick residential driveway (with good base - driveway is 18 years old) to reach a newly poured 6" thick pad for parking my 40' Tiffin? Will a 4" residential driveway hold up without damage to drive across it to reach a thicker pad for parking?

[texaslime]

I drive over our 4 inch slab driveway with wire in it all the time with no problem with our 40ft DP with no problem. Poured driveway about 20 years ago before I ever thought about a motorhome. That being said I don't think I would trust putting down the leveler's and try to pick up the coach. It does work fine just to let them down just enough to stabilize it if need be. Don't do that much being it is level.