Special repair and maintenance to block A, B, C and E type-III staff qtrs. building for structural safety at Sidhgora, Jamshedpur (Jamshedpur- BA) (External work phase-1)

Amount

Providing and laying cement concrete in retaining walls, return walls, walls (any thickness) including attached pilasters, columns, piers, abutments, pillars, posts, struts, buttresses, string or lacing courses, parapets, coping, bed blocks, anchor blocks, plain window sills, fillets, sunken floor, etc., up to floor five level, excluding the cost of centering, shuttering and finishing :

a) 1:1½:3 (1 cement : 1½ coarse sand(zone-III) : 3 graded stone aggregate 20 mm nominal size).

Reinforced cement concrete work in beams, suspended floors, roofs having slope up to 15° landings, balconies, shelves, chajjas, lintels, bands, plain window sills, staircases and spiral stair cases above plinth level up to floor five level, excluding the cost of centering, shuttering, finishing and reinforcement with 1:1.5:3 (1 cement : 1.5 coarse sand (zone-III) derived from natural sources : 3 graded stone aggregate 20 mm nominal size derived from natural sources).

Centering and shuttering including strutting, propping etc. and removal of form work for :

a) Weather shade, Chajjas, corbels etc., including edges

Steel reinforcement for R.C.C. work including straightening, cutting, bending, placing in position and binding all complete above plinth level.

a) Thermo-Mechanically Treated bars of grade Fe-500D or more.

Providing and fixing M.S. grills of required pattern in frames of windows etc. with M.S. flats, square or round bars etc. including priming coat with approved steel primer all complete.

a) Fixed to steel windows by welding

Providing and fixing factory made ISI marked steel glazed doors, windows and ventilators side /top /centre hung, with beading and all members such as F7D, F4B, K11 B and K12 B etc. complete of standard rolled steel sections, joints mitred and flash butt welded and sash bars tenoned and riveted, including providing and fixing of hinges, pivots, including priming coat of approved steel primer , but excluding the cost of other fittings, complete all as per approved design (sectional weight of only steel members shall be measured for payment).

a) Fixing with 15x3 mm lugs 10 cm. long embedded in cement concrete block 15x10x10 cm of C.C. 1:3:6 (1 Cement : 3coarse sand : 6 graded stone aggregate 20 mm nominal size).

Welding by gas or electric plant including transportation of plant at site etc. complete.

Providing & fixing glass panes with putty and glazing clips in steel doors, windows, clerestory windows, all complete with :

a) 4.0 mm thick glass panes (weights not less than 10 kg/ sqm)

Providing and fixing on wall face unplasticised Rigid PVC rain water pipes conforming to IS : 13592 Type A, including jointing with seal ring conforming to IS : 5382, leaving 10 mm gap for thermal expansion, (i)Single socketed pipes.

a) 110 mm diameter

Providing and fixing on wall face unplasticised - PVC moulded fittings/ accessories for unplasticised Rigid PVC rain water pipes conforming to IS : 13592 Type A including jointing with seal ring conforming to IS :5382 leaving 10 mm gap for thermal expansion.

a) Single tee with door (i)110x110x110 mm

c) Bend 87.5° (i)110 mm bend

12 mm cement plaster of mix :

a) 1:6 (1 cement: 6 coarse sand)

6 mm cement plaster of mix :

a) 1:3 (1 cement: 3 fine sand)

Neat cement punning

Painting with synthetic enamel paint of approved brand and manufacture of required colour to give an even shade:

a) Two or more coats on new work over an under coat of suitable shade with ordinary paint of approved brand and manufacture.

Painting (one or more coats) on rain water, soil, waste and vent pipes and fittings with black anticorrosive bitumastic paint of approved brand and manufacture on old work :

a)100 mm diameter pipes .

Painting with synthetic enamel paint of approved brand and manufacture of required colour to give an even shade :

One or more coats on old work.

Finishing walls with Premium Acrylic Smooth exterior paint with Silicone additives of required shade :

Old work (Two or more coats applied @ 1.43 ltr/ 10 sqm) over existing cement paint surface.

Repairs to plaster of thickness 12 mm to 20 mm in patches of area 2.5 sq. meters and under, including cutting the patch in proper shape, raking out joints and preparing and plastering the surface of the walls complete, including disposal of rubbish to the dumping ground , all complete as per directions of Engineer-In-Charge.

a) With cement mortar 1:4 (1 cement : 4 fine sand)

Renewing glass panes, with putty and nails wherever necessary including racking out the old putty:

a) Float glass panes of nominal thickness 4 mm (weight not less than 10kg/sqm)

Renewal of old putty of glass panes (length) .

Providing and fixing bamboo scaffolding system on the exterior side, up to four story height with staircase system in the scaffolding for working platform etc. and maintaining it in a serviceable condition for the required duration as approved and removing it there after. The scaffolding system shall be stiffened with bracings, runners, connection with the building etc. wherever required for inspection of work at required locations with essential safety features for the workmen etc. complete as per directions and approval of Engineer-in-charge .The elevational area of the scaffolding shall be measured for payment purpose. The payment will be made once irrespective of duration of scaffolding. Note: - This item to be used for maintenance work judicially, necessary deduction for scaffolding in the existing item to be done.

Dismantling doors, windows and clerestory windows (steel or wood) shutter including chowkhats, architrave, holdfasts etc. complete and stacking within 50 metres lead :

a) Of area 3 sq. metres and below

Dismantling old plaster or skirting raking out joints and cleaning the surface for plaster including disposal of rubbish to the dumping ground within 50 metres lead.

Providing and fixing M.S. stays and clamps for sand cast iron/centrifugally cast (spun) iron pipes of diameter :

Providing and fixing Chlorinated Polyvinyl Chloride (CPVC) pipes, having thermal stability for hot & cold water supply, including all CPVC plain & brass threaded fittings, i/c fixing the pipe with clamps at 1.00 m spacing. This includes jointing of pipes & fittings with one step CPVC solvent cement and testing of joints complete as per direction of Engineer in Charge. : Internal work - Exposed on wall

a) 25 mm nominal outer dia .Pipes.

b) 40 mm nominal outer dia. Pipes.

Chipping of unsound/weak concrete material from slabs, beams, columns etc. with manual Chisel and/ or by standard power driven percussion type or of approved make including tapering of all edges, making square shoulders of cavities including cleaning the exposed concrete surface and reinforcement with wire brushes etc. and disposal of debris for all lead and lifts all complete as per direction of Engineer-In-Charge

a) 75 mm average thickness

b) 50mm average thickness

Cleaning of reinforcement from rust from the reinforcing bars to give it a total rust free steel surface by using alkaline chemical rust remover of approved make with paint brush and removing loose particles after 24 hours of its application with wire brush and thoroughly washing with water and allowing it to dry, all complete as per direction of Engineer-In-Charge.

a) Bars up to 12 mm diameter

b) Bars above 12 mm diameter

Providing, mixing and applying bonding coat of approved adhesive on chipped portion of RCC as per specifications and direction of Engineer-In-charge complete in all respect.

a) SBR Polymer (@10% of cement weight) modified cementitious bond coat @2.2 kg cement per sqm of surface area mixed with specified proportion of approved polymer

Reparing of damage RCC walls, columns, pillars,pilasters,string courses, beams, Suspended floors,roofs,landings,Shelves,Chajjas,Lintels, balconies,window sill, Stair cases.vertical and horizontal fins individually or forming box louvers, facias and eaves boards etc.upto floor five level i/c cost of Centering Shuttering with Cement concrete 1:1:2 (1 Cement : 1 Coarse sand : 2 Stone aggregate 12.5 mm to 6 mm nomoial size) and top finishing with 6mm Cement plaster 1:3 (1 Cement : 3 Fine sand) excluding the cost of scaffolding as per direction & satisfaction of E-in-C.

a) 50 mm average thickness of repairing

b) 75 mm average thickness of repairing

Deduction for using scaffolding

a)Repairs to plaster of thickness 12 mm to 20 mm in patches

b) 12 mm cement plaster

c) Cement concrete up to floor V level

d) Applying bonding coat..

Providing & fixing PTMT gate valve of approved quality and colour.

a) 25 mm n/b

b) 32 mm n/b

c) 40 mm n/b

Easy and adjusting steel glazed window by cleaning, iron filing and oiling etc. and making good the same for easily opening and closing as per direction of E-I-C.

Repairing of existing steel glaged window i/c grill by welding, cutting, painting etc. and refixing of repaired steel glazed window to existing frames, including replacement of hinges with screws, etc. as required, all complete to make openable as per the direction of the Engineer-in-charge.

Removing tree on wall/roof by cutting and providing chemical/ acid, hing and salt to prevent regrowth including cutting and making good the wall etc. as per direction of E-I-C. (Cement concrete & Plaster used for repairing to be paid seperately)

RATAN MAHTO