because they were beutifull and very expensive
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The upstand beam is very important as it provides support to the given structure. The upstand beam should remain fixed until the construction is over.
I think it is a shell structure.
to design rcc structure in 3 types
The reinforced concrete construction is the construction joint in water retaining structure.
Structural Efficiency= Maximum Mass Supported _______________________ (Divided By) Mass of Structure