Draw a layout of a typical floor of 20-storied private building having a height of 10 ft floor to floor for about 5-8 people living in each floor. You are required to provide reasonable and standard plumbing fixtures. However the total fixture unit per floor must be at least 80. Calculate the fixture unit for each floor of every zone applying zoning concept. Finally design the riser pipe of the building to provide uninterrupted water supply to the people of the building. Provide detail drawing of the plumbing design. Given: Pressure is 55 psi at public main Flush valve fixture except 19th and 20th floor Max pressure at any fixture is not to exceed 45 psi Flush valve needs 15 psi min pressure & flush tank needs 8 psi Fixtures are to be provided uniformly in each floor.