Providing & fixing of Box type steel windows, made of various ERW section outer 60mm x 25mm, central mullion 60mm x 25mm, for shutter 50mm x 20mm having thickness of 1.25mm (18 gauge), shash bar MS Tee 25mm x 3mm where required joints mitered and electrically flash- welded, with iron fittings including necessary iron handles, hinged cleat, tower bolts, iron hold fast and pintle hinges complete (excluding glazing and wire gauge) and finished with ready mixed paint red lead non setting primer complete as per specification, Drawings and to the entire satisfaction of engineer-in-charge. (Note:- Glazing, wire gauge and grill will be paid as per respective items)