tender for special repairs to big ib roof at thekkady- 1 supplying and fixing colour galvalume sheet roof of 0.47mm thick including priming coat fixing in position with all necessary accessories complete complying with standard specification and as directed by the departmental officers. 2 supplying and fixing 32mm gi pipe for truss and purlin 3 supplying and fixing 20mm gi pipe for truss and purlin 4 supplying and fixing in position of pvc water tank of approved by quality conforming to isi specification having suitable cover, bolt including cost of tab, taxes, transportation to work spot, fixing in position a place as shown and directed by the departmental officers including conducting required water test complete complying with standard specification. 5 supplying, laying and jointing pvc pipes 32mm dia (having working pressure 10 kg. / sq.cm) of approved quality and best variety conforming to bis of the following dia including cutting, threading and fixing pvc specials using pvc adhesives (but excluding cost of such specials) and fixing into wall with teak wood plugs, pvc clamps and screws making holes on the wall (or) drilling holes in the roof and making good the dismantled portion to original condition with necessary brick work / cement concrete and plastering neatly wherever necessary with necessary scaffolding charges, etc., complete complying with standard specifications. the pvc pipes shall be got approved by executive engineer before use on works.external above g.l.