Sir I have a doubt about multi storey building. When they cast one slab after another , and load of upper slab is supported on the slab below it. So I am asking that , is there any provision for lower slab to carry upper slab with load of shuttering & formwork. Means how they cast upper slabs supported upon lower slab , even though lower slab is yet to achieve it's full strength. Please explain. Also please explain ' Soft Storey ' . Thanking you..