A five-story hospital with no emergency facility has the special moment frames as the seismic force resisting system. The following information is given the hospital building: Building Material - Reinforced Concrete Ss 1.50 (g); S = 0.60 (g); TL = 8 sec. Site class = C Each story height = 15 feet Floor area = 20,000 ft (each level); Roof area = 20,000 ft Floor weight = 120 psf; Roof weight = 100 psf Exterior wall weight tributary to each floor = 50 kips Exterior wall weight tributary to roof=30 kips Consider interior partition wall weights Grade Required: 1) The effective seismic weight at each level above the base of building. 2) The seismic base shear of the building 3) The story forces (the seismic lateral force at each level of the building). Grade