SPECIAL REPAIR TO DAMAGED ROOF OF VARIOUS BUILDINGS AT 10 AFH UNDER GE (AF) HASIMARA

Amount

Demolition of unreinforced cement concrete in roofs, floors (other than ground floors), beams, staircases, landing, chajjas and similar suspended work, complete all as specified and directed.

M&L for PCC (1:2:4) type B-0 (using 12.5mm graded crushed stone aggregate) with water proofing compound as per manufacturer's instruction in padding etc., complete all as specified and directed. (Note: Water proffing compound shall be measured and paid separtly)

Removing building materials etc. other than spoil to a distance of 100m or under, beyond the lead included in the rates, including loading, unloading and stacking at the destination, complete all as directed. (Note: Old concrete & debris obtain from item No. 1.00 here-in-before be measured).

M&L for cutting out crack to V-section in existing roofs or terracing, cleaning out, wetting, grouting with cement sand slurry (1:3), complete all as specified and directed.

Taking out old damaged tarfelt or membran of any description including screed bed or bedding layer and removing of debris to a distance exc. 50m and n. exc. 100m and cleaning roof surfaces to remove all loose dust etc., roughening surfaces of old concrete roof by picking, sweeping clean and washing down with water using wire brush, brooming down and applying the following treatment all as directed in order of precedence as stated: (a) Brushing neat cement slury with 3.0 kg of cement per Sqm. (b) 15mm thick screed bed or bedding layer in CM (1:4) with water proofing compound as per manufacturer instruction on existing roof surface true to level. (c) Applying one coat of bituminous primer @ 0.40 Ltr/Sqm. (d) Supply and laying 3mm thick APP based polymeric membrane of approved manufactured with weight not less than 3.60 Kgs per Sqm reinforced with non-woven polyester fabric weighing not less than 160gms per Sqm having softening point not less than 15°C, having tensile strength of 650 N/5cm and 350 N/5cm in longitudinal and transverse directions respectively of the reinforced tearing strength of 180 N by torch application. Polymeric membrane shall be taken to a height of 30cm (minimum) and then inserted inside the groove of parapet wall and shall be finished by a membrane flashing. (e) Applying one coat of aluminium paint @ 0.15 Kg/Sgm over APP membrane surface. Note:- (i) Laying APP based polymeric membrane shall be done torch on method as per manufactures instructions. (ii) A minimum overlap of 100mm and 75mm should be made at the end and sides of the polymeric membrane respectively and sealed all overlaps and joints as per manufacturers instruction. (iii) APP based polymeric membrane shall be of any one of the approved makes as specified here-in-after and shall conform to specifications given in IS 16540-2017/1S 16532 2017. (iv) Contractor shall produce necessary test certificate of the manufacturer to the Engr-in-Charge before incorporation in the work. (v) Necessary independent tests shall also be carried out by the contractor without any extra cost to the Deptt as per relevant IS specifications and membranes with satisfactory test results shall only be incorporated in the work. (vi) WPC shall be measured and paid separately as supply only. (vii) The work shall be executed through authorised applicators of original manufacturer only.

Supply only liquid water proofing compound conforming to IS: 2645 - 1975 specification, complete all as directed

Disconnecting existing PVC tanks, capacity exc 500 ltr & n. exc 1000 ltr, setting aside (or lowering, if required) for repair of roof, cleaning and removing all scale and dirt etc. and from mouths of circulating pipes etc, hoisting, if required, re-fixing in same position and reconnecting, complete all as specified and directed. (Note:- Cleaning, repairing, etc. shall be measured separately).

Disconnecting existing PVC tanks, capacity exc 250 ltr & n. exc 500 ltr, setting aside (or lowering, if required) for repair of roof, cleaning and removing all scale and dirt etc. and from mouths of circulating pipes etc, hoisting, if required, re-fixing in same position and reconnecting, complete all as specified and directed. (Note:- Cleaning, repairing, etc. shall be measured separately).

S&F 500 litres capacity rotational moulded polyethylene water storage tanks, three layered, (cylindrical vertical with closed top) ISI marked, confirming to IS 12701-1989, with lid, hoisted and fixed in position with and including 20mm PTMT ball valve high pressure with polythene float and nut including dismantling of old unserviceable water tank, complete all as specified and directed. The date of installation to be mentioned on tank with synthetic enamel paint with letter size 10cm high in white colour, over a black background of appropriate size,as (DD/MM/YR) with sign from occupant.

S&F 1000 litres capacity rotational moulded polyethylene water storage tanks, three layered, (cylindrical vertical with closed top) ISI marked, confirming to IS 12701-1989, with lid, hoisted and fixed in position with and including 25mm PTMT ball valve high pressure with polythene float and nut including dismantling of old unserviceable water tank, complete all as specified and directed. The date of installation to be mentioned on tank with synthetic enamel paint with letter size 10cm high in white colour, over a black background of appropriate size,as (DD/MM/YR) with sign from occupant.

Taking down cement plaster of any description on brick or stone walls, etc., including raking out joints, hacking for key, scrubbing down with water, etc., complete all as specified and directed. (Note: Plastering work at any height necessary scfolding, safety belts required shall be provided by the contractor and quoted rate shall deemed to be included.)

M&L 20mm thick rendering on fair faces of brick work or concrete surfaces in two layers (12mm + 8mm) in CM (1:4) on external wall finished even and fair mixed with integral water proofing compound on top layer as per manufacturer's instruction, complete all as specified and directed. (Note:- WPC shall be measured and paid separately as supply only.)

M&L for 15mm thick rendering on fair faces of brick work or concrete surfaces in CM (1:6), finished even and smooth without using extra cement, complete all as specified and directed.

M&L for 5mm thick rendering on fair faces of concrete surfaces as in ceiling etc. in CM (1:3), finished even and smooth without using extra cement, complete all as specified and directed.

M&L for preparing surfaces of new plastered wall surfaces and applying two coats of oil bound distemper over a coat of chalk whitening primer, complete all as specified and directed.

M&L for preparing surfaces of new plastered ceiling surfaces and applying two coats of oil bound distemper over a coat of chalk whitening primer, complete all as specified and directed.

M&L for preparation of old plastered or unplastered surfaces of walls by brooming down or steel wire brushing, scrapping down smoke soot, moulds, moss and efflorescent salts and trading oil and greasy spots and applying one coat of oil bound distemper, complete all as specified and directed.

M&L for preparation of old surfaces of ceiling by brooming down or steel wire brushing, scrapping down smoke soot, moulds, moss and efflorescent salts and trading oil and greasy spots and applying one coat of oil bound distemper, complete all as specified and directed.

M&L for preparation of newly plastered wall surfaces and applying two coats of cement base paint over a coat of alkali resistant primer, complete all as specified and directed.

M&L for preparing old plastered or unplastered surfaces of wall including washing rubbing down and scrapping smoke soot moulds, moss and greasing sports with steel wire brush and applying one coat of cement base paint, complete all as specified and directed.

S&F pre-painted galvalume aluminium zinc coating, GI based corrugated steel sheet, 0.50mm thick, of any colour, having tensile strength of 550 Mpa as in roof covering/cladding to wall, fixed with self tapping screws as specified including dismantling of old CGI sheets, complete all as specified and directed.

S&F pre-painted galvalume aluminium zinc coating, GI based plain steel sheet, 0.50mm thick, of any colour, having tensile strength of 550 Mpa as in roof covering/cladding to wall, fixed with self tapping screws as specified including dismantling of old PGI sheets, complete all as specified and directed.

Sch 'A' Part-II (Schedule of Credit) Note: An amount of Rs.8320.00 indicated in tender documents as Schedule of Credit shall be deducted from the total quoted amount of Boq to arrive at the contract sum.

M/S. VINITA CONSTRUCTION

SHRI SURAJIT SIKDER

MAA TARA TRADING

M/S MANODEEP CONSTRUCTION

M/S ANNI ENTERPRISE

M/S ANIL KUMAR BAUL

M/S ASHOK ENTERPRISE