ADDN/ALTN TO BLDG NO A-56 (OR SINGLE LIVING ACCN) ALONGWITH REPLACEMENT OF TILES AT SIGNAL UNIT HAPPY VALLEY AND PROVN OF 02 X SEPTIC TANK AND SOAK WELL FOR SENTRY POST NO 1 AND POST NO 2 AT SIGNAL UNIT HAPPY VALLEY UNDER GE SHILLONG

S&F Pre-painted galvalume aluminium zinc coating GI based corrugated/Semi Corrugated steel sheet 0.50 mm thick of an colour having tensile strenngth of 550 Mpa as in roof covering/cladding to wall, fixed with self tapping screws including dismantling of plain/corrugated steel sheeting any gauge, thickness in roof covering complete all as specified and directed.

S&F Pre-painted galvalume aluminium zinc coating GI based plain steel sheet 0.50 mm thick of an colour having tensile strenngth of 550 Mpa as in roof covering/cladding to wall, fixed with self tapping screws including dismantling of plain/corrugated steel sheeting any gauge, thickness in roof covering complete all as specified and directed.

S&F 2nd class HW boarding 20mm thick fixed with nails as in eaves board planed one side with butt joint including dismantling boarding of any description complete all as specified and as directed.

M&L for water proofing treatment to RCC roof slab, including parapet comprising with the following courses of treatment/specification from bottom to top:- (i) Taking out old roof treatment and roughening the same old concrete slab by picking, sweeping clean and washing down with water to remove dust etc.and applying cement slurry @3kg/Sqm (ii) Screed bed or bedding layer of mortar 1:4 in 15 mm thick for laying as in roof slab with mixing of WPC and surface finished fare and smooth without using extra cement. (Note: WPC shall be measured and paid for under separate items) (iii) Cleaning of plastered roof surface and applying one coat of cold bituminous primer @ 0.25ltr /Sqm conforming to IS:3384-1986. (iv) APP based polymeric membrane 3mm thick (minimum), weighing 3.5 Kg/sqm reinforced with polyester non woven fabric (weighing not less than 160 gms/Sqm) shall be less applied over bituminous primer as specified above over a Application of polymeric membrance shall by torch application. The overlaps shall be minimum 100mm on the transverse direction and 75mm on longitudinal direction. (v) Applying one coat of aluminum paint over the APP modified membrance @ 0.11Kg/sqm.

M&L for 4mm thick Non asbestos fibre 600 x 600 mm cement building boards fixed or laid/ inserted to timber/GI/Aluminium framework with nails as in ceiling,including dismantling wall and ceilling boards of any description including cover fillets complete all as specified and directed.

M&L for Anodised aluminium snap grid frame work for false ceiling complete all as specified and as directed.

M&L for Hangers 6 mm dia. G.I. (upto 1200mm length) adjusting level fixed to roof slabs by means of ceilling cleats made out of G.I. flat 40 x 3 mm size 60mm long and expansion hold fasteners 12.5mm dia. 40mm long complete all as specified and as directed.

Demolition of Precast cement concrete block walling in any position, complete all as specified and directed.

M&L Precast PCC (1:3:6) type C1 (using 20mm graded agg) solid block masonry exc 10cm in width or girth and setting CM (1:6) complete all as specified and directed.

Taking down cement plaster in cement or cement lime mortar on brick or stone walls etc. including raking out joints, hacking for key, scrubbing down with water etc, Including removal of debries out side MD land all specified and directed.