Helping the plumber

Ok, perhaps I stated it wrong. I am building a new house for my wife, and we are going to pour the concrete foundation tomorrow. I have roughed in the DWV system and placed the copper supplies for the pour and I plan on having a bath TUB in one of the 2 bathrooms. I need to know what the
dimensions of the space to place the drain shoe of the bath TUB should be.
I don't want to have to raise the tub off the floor to hook up the drain and overflow. Please help. David

hj

It depends on the bathtub. You either have to have the bathtub there to figure it out, or get the installation drawing from the manufacturer.