iron structure

Yes you can claim ITC

No you cannot as per
[c] works contract services when supplied for construction of an immovable property [other than plant and machinery] except where it is an input service for further supply of works contract service;

[d] goods or services or both received by a taxable person for construction of an immovable property [other than plant or machinery] on his own account including when such goods or services or both are used in the course or furtherance of business.

Explanation.--For the purposes of clauses [c] and [d], the expression "construction" includes re-construction, renovation, additions or alterations or repairs, to the extent of capitalisation, to the said immovable property;