Steve, The weight of the filled tub (dimensions 32 x 60)is around 700 lbs (plus occupant). Our house is all true 2x's made out of native oak. In general, the house is very very sturdy as I have lost countless drill bits and sawzall blades to this very same wood. The location is in an outside corner. What would you or anyone else recommend doing to shore things up a bit underneath. The ceiling and walls below are wide open for another couple of weeks until we get plumbing run. The joists run perpendicular to the long dimension of the tub. Your opinions will definitely be appreciated.