Dear Chanchal,
Chandhrika's question is that their client are construting office Building for placing the plant & machinery and for that they have purchased Iron and steel
Well Chandhrika, Vat Input is not available on any material used for the Building Construction, i.e. Sand, Cement, Steel, Iron, Angles etc.
Your client will not get the input Vat credit on purchase of above material, But if you can proove that the Iron and steel purchased was for the erection of the Machinery, without that the machinery cannot run and produce the production then in such case only such component of material which are used for the purpose of machinery installation/Erection input Vat can be claimed