Hi,
It does seem like a pole barn is what you are describing. If you build it properly, and tell the designer that you will be installing doors on all 4 sides, you can have them engineer in larger poles where they will be needed to support the walls/doors.
I worked on a Arby's once, and a car crashed into the 'wall'. Turned out to be 8X8's in the corners and sliding glass 10' X 10' doors in between the 8X8 support columns. They kept the glass doors closed all the time, and it got me thinking about a enclosure for a pool here in Portland OR, where it can get to 30F outside a few nights each winter. It would work, and I am guessing that the pool building will get very humid (I have one at work too, so I know about these things) and I could open the doors to let in outside air, closing off screens to keep out bugs in the summer.
Normally the pole foundations need to be a little deeper than the 4" or so concrete of the barn floor. Many pole barns skip the floor, but my guess is you want the concrete floor, or at least 4" asphalt?
You might want to contact a place like this one.
http://www.empirebuilt.com/ They can calculate the beam size, and any snow loading, produce a CAD drawing that will meet your local planning and building codes.
My suggestion is to list this as a 'barn' and not ever tell them you plan on parking the RV inside, or living in it. Many counties require a home to be built before anyone can live on the property.
Also check with your local planning department about water supply. Do you have city water and a hydrant nearby? If so, great. If not, you need the well a certain distance from any septic system, even the neighbor's. Not near a creek, or certain other areas. How much water do you require for fire protection? I plan on building in a rural area, and they suggest a 500 gallon tank and 2 HP pump to supply water to a sprinkler system in the house. This will supply about 7 GPM to several sprinkler heads for a few minutes. IF that is not enough water, well the house is burning to the ground anyway.
Some require 5,000 gallon tanks (S!) In Lakeside Ca, due to a recent drought, and the possibility of grass fires, they are requiring recently burned out homes to have a 15,000 gallon water tank before even considering their building plans!
Some communities have very low water levels, and even pumps that are drilled 450 feet are going dry in the summer. One home had a rain collection system, and they had to buy 5,000 gallons at a time when summer hits. Sometimes they do not have the ability to fill the tanker trucks, that will happen this summer in CA. One such system was featured in
HomePower.com magazine. They showed how the pumping system and water filter system worked for her home in CA.
Good luck on your building. My suggestion is make a provision for collecting storm water if you need to. What lands on your roof is normally plenty to irrigate a acre or so. If you live in a very dry area, I would plan on some heavy duty sprinklers on the roof, where you can turn them on during a fire event. Just raising the humidity level will lessen the chance of the fire getting closer to you! IT would also be a handy way to wash the solar panels during a dry summer. . . .
Good luck with your building!
Fred.
