My lift is 16' tall and I have 14' ceilings I boxed it in between 2 trusses. It's not holding it in place I just felt better framing it in. Some of the new stud finders can locate plastic water lines. If your floor is built to the international residential code it will have 6" X 6" welded wire mesh in it. Keep in mind building codes are minimum requirements. I am a licensed structural commercial contractor but I have no idea how your floor was built. There are ways to have it tested.
