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Open Roads Forum  >  Fifth-Wheels

 > Concrete thickness for parking pad?

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Jeff4au

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Posted: 01/11/09 12:24pm Link  |  Print  |  Notify Moderator

I have an aluminum cover for my 5th wheel and the driveway under it is gravel I want to concrete it. Is 4" thick enough or does it need to be thicker?


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Crazy Ray

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Posted: 01/11/09 12:34pm Link  |  Print  |  Notify Moderator

I made mine 6 , footing 12


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Ranger Smith

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Posted: 01/11/09 12:35pm Link  |  Print  |  Notify Moderator

When I built my RV park I used 2x6 for concrete forms with rebar. That should suffice. I think a 4" pad may be a bit shy. But I am not a concrete expert


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Posted: 01/11/09 12:35pm Link  |  Print  |  Notify Moderator

I made ours 5" with steel rebar on 20" centers.
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Posted: 01/11/09 12:41pm Link  |  Print  |  Notify Moderator

Why don't you do a mono-lithic pour with 6" where the wheels roll and two in the middle. Re-inforce the wheel tracks with some rebar and you should be home free. Takes as much as just 4" thru out. JMHO


charles weidman

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Posted: 01/11/09 01:24pm Link  |  Print  |  Notify Moderator

First, evenly spread the gravel then thoroughly compact it with a jumping jack or rolling vibratory compactor. Then pour a 4" slab with 6X6 wire reinforcing mat. When pouring, use a concrete scoring tool to cut expansion joints at about 4'-8' on center in both directions. The secret is a good subgrade. My 11,000# Apenlite has not caused a single crack.

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pigman1

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Posted: 01/11/09 01:40pm Link  |  Print  |  Notify Moderator

We poured a 4" floor wire reinforced for temperature (the wire doesn't add strength, only keeps it from cracking due to temp changes) and made it 8" under the wheel and jack parking positions. I previously had 16x16x8" thick poured concrete pads where the jacks landed on a dirt floor and did not have an issue. The solid floor sure makes it easy to do maintenance. We're at 35,000 pounds.

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Flyin Finn

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Posted: 01/11/09 02:19pm Link  |  Print  |  Notify Moderator

6" is the common thickness. But you can do 4", as long as the sub grade is properly prepared (gravel or sand, well compacted, etc...), using re-bar, and also consider using stronger grade of concrete.
It is also important that the concrete is applied correctly (not adding too much water to the mix).
If you have a very heavy 5th wheel, I would recommend 6" thickness.

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cummins2014

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Posted: 01/11/09 02:33pm Link  |  Print  |  Notify Moderator

I am surprised to see people pouring that thick of concrete for a rv pad, mine is poured 4", 6 bag. My pad is 10 x 50 . Expansion joints 5 feet down the middle and 5 feet centers. No rebar, wire mesh, or other type of reinforcement . If you are compacted well under the pad you are good to go with 4" . My pad is nine years old gone thru 8 winters ( Utah ) no cracks or settling with a nearly 13k fifth wheel setting on it. Anything more than 4" is a waste of money and concrete.

ryoung

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Posted: 01/11/09 02:38pm Link  |  Print  |  Notify Moderator

For the fifth wheel you presently have, 4" thick is sufficient. But if you ever consider upgraging to a motorhome, you will most likely will crack it at that thickness. Always plan for the future. Another 2 inches will add 50% to the concrete cost, but should not add anything to the finishing costs depending on the grade.

ryoung

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