Dear Engineers!
i need guidance in modelling overhead water tank in etabs. For Top Slab, the spans are 30'x30'. Should i provide beams to support the slab. Further, normally we dont see columns extending to the top and terminates at the verge of shear wall. should i extend the columns beyond the last level and extend it in the water tank walls to support the beams.
Further, if beams are necessary they will cross each other in the middle but will be without any support due to water tank.
lastly, what should be the preferred foundation type. also detailing of RCC wall