It sounds like you don't want the man to have a pool table in his home.
No, I'm telling him that due to the construction of his home, if he doesn't take precaution when putting that table in. It could, if like all the other trailers I've been around, suffers from any water damage (even minor) the floor could fail. And if Greg wouldn't of opened his mouth to insinuate he was the one with knowledge and everyone else was trolling and giving bad advise, I would of responded differently. But if you think Greg's advise is best, are you or Greg willing to foot the bill for that person to come out and look over the situation and advise on what steps to take? Because I have a hunch that the guy will cost more than the work will.
Just got back from my friends house .. taking a close look at the underside of the mobile home. here are some facts...
The floor is made with 2 x 6 joists on 16" centers and then covered with either particle board or OSB - what is the difference between particle and OSB? This decking looks like particle board to me, but I'm not sure what OSB really is.
I really appreciate the comments from folks who have been under some trailers and have experience in real world applications.
It would be possible to place two legs directly over one joist but not the other. There is also a vapor lock that would need to be opened up and then resealed, this I'm comfortable with, and I think I can sister and brace up the other end to be strong enough.
Now if this decking gets wet in the future than all bets are off -- It's going to be real ugly.
Should I tell my friend that I will do it only if he is willing to let me replace the decking with marine grade plywood? Fortunately for him, he lives in the desert, it hardly ever rains and is always dry as hell.
Thanks to all who have contributed .. even the jokesters, for them I have this...
" If you think loading up the dishwasher means getting the wife drunk .. you just may be a red neck."
" If the house your living in has wheels under it and your car in the front yard does not .. you just may be a red neck."
This home was built by a company called Palm Harbor. I spoke with someone there who told me - "No problem, we have put baby grand piano's and thousand pound gun cases in our homes."
So for what ever that's worth - lol.
Additionally, I feel strongly that this floor would support the table as is, if you just simply put it in the house. I'm just not sure if the table would stay level due to the compression and or shifting of the floor without reinforcement.
I'm inclined at this point to tell him it's a go with thick marine ply decking and direct high pressure column support underneath all four legs.
Besides, he really wants a table in his house.
Particle board, which I linked to earlier, is made up of basically sawdust chips. Very fine particles of wood, which are then soaked in a glue solution and pretty much pressed into the shape of the sheet. Same for MDF. Now OSB uses wood shavings, much larger pieces of wood, to construct the sheet. Plywood on the other hand is laminated 1/8" thick layers of wood compressed and glued together.
And how close do the feet that aren't on a joist sit to a joist. Right between two? I'm almost inclined say that the easiest way to go about this, would be to pull up the carpet in the entire room. Lay down some 7/8" plywood over the entire room, gluing and screwing it down. Don't replace the particle board, that'll be way too messy. It's glue and stabled to the joists. That way you bond the two flooring's together and shouldn't need braces underneath. This should prevent the table from falling through the floor if there's a water leak. But you'll be able to notice the movement of the damaged floor. Put the carpet back down and you're good to go.
If he doesn't want to add more flooring, you'll probably at least still need to pull up the carpet to find the joist and then measure from there to figure out if the table can sit on one or not. If it can't sit on at least one joist, figure out where the feet will sit drill a small hole (1/8") in the center of each spot. While someone is underneath the trailer, attempt to poke a wire straight down through. This will allow you to open a much smaller hole underneath when putting the supports up and through the barrier and insulation.
You still failed to mention if the trailer was on top of a concrete pad or sitting over dirt. This affects what type of braces you will use.
As for a safe, or piano going into a trailer home. Sure I believe them, but I guarantee that the piano probably weighs less than the pool table and the safe is going to be spanning several joists nicely. So in both cases neither match issues faced with here.
I have a pro 8 in my double wide,....
And is you're double wide sitting on jack stands like his single wide is? Or does it have a foundation it sits on?