getting ready to install a full bathroom in my homes attic. my question is, what clearance is needed depth wise for the closet bend and the trap for the tub? the joists are 7" deep plus the 3/4 for the floor. Am i going to have to pick the floor up or worst yet go into the ceiling below to get the clearance i need? any comments,suggestions would be helpful. Have the basic knowledge to rough in a bathroom, but they were basement projects.Thanks