The legs or steadies as they are called are just that,they steady the van and are not meant to level it or prop it up.If youve damaged the floor using what youve suggested may help.
you are lucky in one respect the floor has give way and can be repaired.overdoing the leg winding can lead to a twisted chassis.a thin metal plate each side of the floor and bolted through would help.
------------- the only silly question is the one you do not ask.