SPL REPAIRS TO BLDG No P-280 OR LINE IN ZONE J AT MIL STN AGARTALA

Taking out complete existing roof treatment from roof surfaces and roughening of surfaces of old concrete floor by picking, sweeping clean and washing down with water to remove dust and removing rubbish at distance not exceeding 50m as per direction of Engineer-in-Charge complete all as specified and as directed t site.

Material and labour for 15 mm thick screed bed or bedding layer in CM 1:4 in order to maintain proper slope over existing roof surface for applying single component acrylic polymer modified, finished even and fair without using extra cement complete all as specified and as directed t site. (Note: Polymeric membrane shall be measured and paid seprately under relevent item of this Schedule 'A')

Material and labour for PCC (1:2:4) type B1 (using 20mm graded stone aggregate) as in roof kerb, slightly rounded or chamfered on edges, mixed with water proofing compound in top layer as per manufacturer instruction finished even and smooth on exposed concrete surface without using extra cement all complete all as specified and as directed at site. (Note: Liquid WPC shall be measured and paid separately)

M & L for cleaning plastered surfaces to receive the water proofing membrane, applying one coat of hot paving bitumen of penetration value 85/25 conforming to IS 73 @ 1.20 kg/sqm over a coat of bitumenous primer @ 0.30 ltrs per sqm and applying a layers of APP based polymeric membrane, 3mm thick (minimum) weight 3.00 Kg/sqm reinforced with polyster non woven fabric (weighing not less than 150 gms/sqm) shall be applied over Bitumenious primer (Application of polymeric memberane shall be by torch sealed application, over laps shall be minimum 100mm on the transverse direction & 75 mm on the longtudinal direction) polymeric membrane shall be taken to a height of 60 cm (minimum) and then inserted inside the groove of parapet wall and shall be finished by membrane flashing, coved fillet in PCC (1:2:4) type B-0 of radius 75 mm shall be provided at the junction of roof & other vertical surfaces & surfaces shall be painted with applying one coat of aluminium paint over the APP modified membrane @ 0.11 kg/sqm complete all as specified and as directed at site.

Dismantling of AC sheet corrugated / CGI corrugated sheets in roofing any gauge and any thickness including ridge, valley/gutter etc. complete all as specified and directed at site.

Supply and fixing pre-painted galvalume aluminium zinc coating GI based corrugated steel sheet 0.50 mm thick of any colour having tensile strength of 550 Mpa as in roof covering, fixed with self tapping screws complete all as specified and as directed at site

Supply and fixing pre-painted galvalume aluminium zinc coating GI based plain steel sheet 0.50 mm thick of any colour having tensile strength of 550 Mpa as in roof covering, fixed with self tapping screws complete all as specified and as directed at site.

Material and labour for preparation of old steel surfaces over 10cm width or girth and applying one coats of synthetic enamel paint complete all as specified and as directed at site.

Dismantling of wrought iron or mild steel work of any description not otherwise provided for complete all as specified and as directed at site.

S&F steel work in tubular trusses including special shaped washer etc. complete using ERW or induction butt welded tubes cinfirming to IS 1161-1979 grade St -240 with necessary welding and reveting complete all as specified and directed at site.