Depends on the density, how strong the mobile home floor is, and where you place it in relation to the floor structure I would guess? I know two people that have good-sized safes in their mobile homes without issue. I would probably lay out some plywood or 1/8 metal plate or something to help disperse some of the weight.So, on the subject of safes. Does anyone think a mobile home floor could support a safe? Not a massive one.