Correct option is D
The components of R.C. Cover head circular tank. The various components of elevated tank are as follows.
· Top Roof Dome The dome at top usually 100mm to 150mm thick with reinforcement along the meridian and latitudes.
· The rise is usually 1/5th of the span.
· Ring Beam The ring beam is necessary to resist the horizontal component to the thrust of the dome. The ring beam will be designed for hoop tension induced.
· Circular Wall: This has to be designed for hoop tension caused due to horizontal water pressure and to resist bending moment induced to wall by liquid load.
· Bottom Slab: This will be designed for total load above it. The slab will also be designed for the total load above it. The slab will also be designed as a slab spanning in both directions.
· Bottom Beams: The bottom beam will be designed as continuous beam to transfer the entire load above it to the columns
