SPECIAL REPAIRS TO BUILDING NOS T 20 INLIVING BLOCK P 101 VICTUALLING CLOTHING AND NAVAL STORES AT STORE OFFICE AT INS GOMANTAK UNDER GE GOMANTAK VASCO

Amount

Schedule 'A' Part I - B/R portion

Dismantling asbestos cement (corrugated, semi corrugated, etc.) sheets in roof coverings including ridge complete all as specified and as directed

S&F Pre- painted galvalume aluminum zinc coating GI based corrugated steel sheet 0.50mm thick of an colour having tensile strength of 550 Mpa as in roof covering/cladding to wall, fixed with self tapping screws complete all as specified and as directed

S&F Pre-painted galvalume aluminum 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 complete all as specified and as directed

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

S&F Rolled sections as in main and cross beams, hip and jack rafters; purlins where connected to common rafters and running rails and guides for sliding doors; fixed with angle cleats or other connecting plates GDE Fe 410-0 W (Gde E-250) quality A complete all as specified and as directed

Supply & Fixing mild steel works in roof trussed framed, trussed, purlins, crane gantries, rails and fastenings and heavy brackets framing (Beam, tee, angles, channel or flat sections) MS pipe etc including distance pieces, cleats etc. (Fe- 410-W (Gde E-250 quality A) complete all as specified and as directed

M&L for applying two coats of synthetic enamel paint on steel & iron surfaces of any description, not otherwise, described, over 10cm width or girth including preparation of new surface & applying one coat of red oxide, zinc chrome complete all as specified and as directed

M&L for applying one coat of synthetic enamel paint on old steel & iron surfaces of any description, not otherwise, described, over 10cm width or girth including preparation of old painted surface complete all as specified and as directed

Demolition of brickwork or stone/ boulder masonry, built in cement mortar including all quoins, arches, pillars, etc, but excluding ashlar facings, dressed stonework and precast concrete articles complete all as specified and as directed

M&L for pre-cast cement concrete block masonry Type C5 with solid blocks, exc. 10 cm in width and setting in cement mortar 1:6 complete all as specified and as directed

Taking down cement plaster on brick work or stone walls including racking out joints ,hacking for key, scrubing down with water etc complete all as specified and as directed

Dismantling floor, hearth or wall tiling including cement mortar bedding, removing rubbish off the premises complete all as specified and as directed

M & L for screed bed or bedding layer or mortar 20mm thick for laying floor finishes in cement mortar 1:4 complete all as specified and as directed

M & L for screed bed or bedding layer or mortar 15mm thick for laying floor finishes in cement mortar 1:4 complete all as specified and as directed

M & L for non-skid coloured ceramic tiles 7 to 8 mm thick area of each tiles exceeding 0.6 sqm but not exceeding 0.11 sqm, in floors etc set and jointed in neat cement slurry and pointed in white cement or coloured cement to match complete all as specified and as directed

M & L for glazed ceramic coloured tiles in vertical surface 450x350x 7 mm thick set and jointed in neat cement slurry and pointed in white or colour cement to match with colour tilesincl 10mm thick cement plaster in cement mortar 1:4 for receiving tile complete all as specified and as directed

Demolition of cement concrete in floor and pavings not exceeding 15 cm thickness (below or above ground level) complete all as specified and as directed

M&L for 25 mm thick PCC type B-0, 1:2:4 (12.5 mm graded aggregate) as in levelling course in floors complete all as specified and as directed

M&L for 75 mm thick PCC type C-1, 1:3:6 (using 20 mm graded aggregate), as in plinth protection including necessary form work etc complete all as specified and as directed

M & L for 20 -22 mm thick kota stone, machine cut kota stone slab flooring over cement screed base laid in cement mortar, and jointed in neat cement slurry mixed with pigment to match the shade of slab including rubbing and polishing complete (mirror polished) complete all as specified and as directed

M & L for 20 -22 mm thick kota stone in riser of steps, skirting, dado and pillar laid over cement screed and jointed and jointed in neat cement slurry mixed with pigment to match the shade of slab including rubbing and polishing complete all as specified and as directed.

S&F Vitrified Ceramic tiles 10 mm thick (square/rectangular) polished area of each tile not exceeding 0.36) in floors set and jointed in neat cement slurry and pointed in white or coloured cement to match complete all as specified and as directed

M&L for rendering cement plaster 15 mm thick in cement mortar 1:6 on fair faces of brick/concrete faces (internal walls) finished even and smooth without using extra cement all as specified and as directed.

M&L for rendering in cement mortar 1 : 4 (10+5)=15mm thickness on brick/cement/stone surfaces and finishes the surface even and smooth with out using extra cement including mixing with liquid WPC on top 5mm thick only complete all as specified and as directed Note :- Water proofing compound shall be measured and paid separately

Supply only integral liquid water proofing compound of approved make (ISI marked) for addition in cement mortar/concrete all as specified and as directed.

Taking down of chowkhat or frame area exceeding 1.5 Sqm and not exceeding 4 sqm each with shutter (without taking off shutters from frames) complete all as specified and as directed

Taking down of chowkhat or frame area not exceeding 1.5 Sqm each with shutter (without taking off shutters from frames) complete all as specified and as directed

S & F 30 mm Plain, framed, panelled shutters (any number of panels), with panels of timber flat on both sides (feather edged), or of veneered particle board medium density, wood particle board with commercial face veneers: supplied and fitted to chowkhats complete all as specified and as directed .

S & F 2nd class hard wood plain solid straight chowkhats frames wrought, framed rebated on the solid rounded or chamfered put together with glue pinned at joints complete all as specified and as directed .

S&F 35 mm thick 2nd class hard plain, framed, panelled shutters (any number of panels), with panels of timber flat on both sides (feather edged), or of veneered particle board medium density, wood particle board with commercial face veneers: supplied and fitted to chowkhats complete all as specified and as directed

S&F Glazed skeleton shutter, 30 mm thick, divided into squares plain chamfered open rebated and prepared to received glass gauze etc, edges of framing plain chamfered or rounded fitted with cut and mitred beads for securing glass, etc sizes of members of shutters as specified . supplied and fitted to chowkats.2nd class hard wood complete all as specified and as directed .

M&L for preparation for new wooden surfaces of any description over 10cm width or girth and applying two coats of synthetic enamel paint over a coat of pink primer complete all as specified and as directed

M&L for preparation of old painted surfaces of wood and wood based surfaces of any description, not otherwise described, over 10cm width or girth, and applying one coat of synthetic enamel paint complete all as specified and as directed

S&F Powder coated aluminium window/ventilators shutter including frame, any type sliding or openable with frame, & other similar work etc. fabricated by using the standard section including necessary arrangements to receive 4mm thick glass or wire mesh with aluminium channel beading & stainless steel screws including the cost of rubber gasket/rubber beading etc. complete including necessary handles, roller wheels, hinges etc complete all as specified and as directed. Note :- Weight of aluminium section shall be measured exclusive of all fittings fixtures, hinges, handle, bolts, rubber gasket/rubber beading and locking arrangements.

S&F Aluminium powder coated window and ventilator shutters, fixed type without sash bars, aluminium section section weighing 0.055 kg/m including necessary joining cleats, glazing clips,rubber packing, anodised aluminium snap beading, screws, fixing etc. complete all as specified and as directed

S&F Aluminium alloy anodised sliding door bolt 250mm long with hasp, staple and fixing clips of sheet, cast or extruded sections and fixing bolts complete all as specified and as directed

S&F Aluminium alloy anodised sliding door bolt 300 mm long with hook and staple(bolt type) and fixing clip of sheet coat or extruded section and fixing bolt and sliding bolts of extruded section complete all as specified and as directed

S & F Aluminium anodised barrel tower bolts 300 mm long complete all as specified and as directed .

S&F Aluminium, anodised barrel tower bolts 150mm long of extruded section complete all as specified and as directed

S&F Aluminium anodised wire mesh of size 0.45 mm nominal dia of wire and average width of aperture 1.40 mm and fixed with aluminium wire staples complete all as specified and as directed .

S & F Extruded aluminum anodised alloy handle 150 mm fabricated type complete all as specified and as directed .

S & F Stainless steel butt hinges 100 mm long complete all as specified and as directed .

S&F Glazing with 4mm thick sheet glass ordinary type including rubber beadings/gaskets around glass panes complete all as specified and as directed .

S&F Aluminium powder coated grill of make DG 104(10mm thick) including 'F'/'L' channel around grill complete all as specified and as directed .

S&F Door closer (aluminium die cast body) hydraulically regulated, designation No. 3, universal type, suitable for door shutters of 851 to 1000 mm in width and of weight between 61 to 80 kg and fixed complete all as specified and as directed

M & L for treating small articles such as stop, covers, gully gratings, holdfasts, ends of posts, backs of chowkhats, etc., area not exceeding 0.1 sq. m each complete all as specified and as directed

Dismantling/Taking down existing hessian base felt or clay tiles or any other water proofing treatment from roof/chajja including cement plaster, cleaning the surface and remove the dismantled debris to a distance exceeding 1.50Km but not exceeding 5Km to out side the MD land including taking down old plaster complete all as specified and as directed

S & F PVC solid factory made door frame of size 50 mm x 47 mm made out of 5 mm thick plain colour PVC sheet reinforced with MS square tube complete all as specified and as directed .

S & F Factory made solid panel PVC door shutter 30 mm thick (Style) consisting of frame made out of MS tubes for top and bottom rails. MS frame shall be covered with heat moulded plain colour PVC ‘C’ channel having a PVC sheet strip of 20 mm width struck inside with solvent cement for stiles and plain colour PVC sheet for top rail, lock rail and bottom rail on either side and gap insert for top rail and bottom rail, paneling of plain colour PVC sheet to be fitted in the MS frame welded/sealed to the stiles & rails with suitable PVC sheet beading and jointed together with solvent cement complete all as shown in SSR Part – I 2009 and as directed by GE/Engineer-in-Charge.

Taking up or down 20 mm steel tubing and connections, fixed to wall /floor complete all as specified and as directed

Supplying and laying of 20 mm dia CPVC pipes SDR 11 & Plain CPVC SDR 11 fittings on walls/ceiling or laying in floors complete all as specified and as directed

S&F in repair Vitreous china squatting pan, 'Orissa' pattern, size 580x440 mm white, with integral foot rests, including 10 ltr capacity PVC valve less, syphonic action type, flushing cistern, low level ,white, with inlet ball valve, float and handle including brackets & Trap, lime concrete bedding complete all as specified and as directed

S & F in repairs flush pipe of polyethylene of low or high density or PVC 32 mm dia for low level cistern complete all as specified and as directed

S & F in repairs vitreous china wash basin, white, flat back, size 630x450mm excluding taps, waste, chain and plug and porcelain stopper but including brackets complete all as specified and as directed

Supply only pillar taps, 15mm dia, cast copper alloy, fancy type with capstan heads, chromium plated, screwed down high pressure, with or without lettered ‘Hot' or ‘Cold' with long screwed shanks and fly-nuts, screwed for iron pipe complete all as specified and as directed

S & F in repair CP stop cock/angle cock 15mm dia, fancy type with capston heads screwed both ends for iron pipe or for unions complete all as specified and as directed

S & F in repair Bib taps, 15mm dia, cast copper alloy, fancy type, with capston head, screwed down, screwed for iron pipe or for brass ferrule complete all as specified and as directed

S & F in repair chromium plated shower roses with swivel joints any size including fixing to pipe or union complete all as specified and as directed

S & F in repair Towel Rail 600mm long fixed with and including Chromium plated brass screws and wooden/plastic cleats .(Minimum weight 190gms) complete all as specified and as directed

S & F in repair PVC connections 15 mm size with PTMT nuts of length 600m complete all as specified and as directed

S & F in repairs PVC (SWR) floor trap, plain with grating including jointing with solvent cement complete all as specified and as directed

S & F in repairs cast iron nahani trap with steel grating including jointing to waste pipe fixed in cement concrete type B1 (1:2:4) complete all as specified and as directed

M & L for 40 mm dia high density polyethylene pipes laid in floor/trenches/ waste pipe of wash basin/spout pipe etc complete all as specified and as directed

S & F Stainless steel soap dish standard size heavy duty complete all as specified and as directed

Dismantling of CI drain pipe, 100 mm dia, jointed in cement mortar and taking out trenches complete all as specified and as directed

S&F PVC (SWR) pipes 110mm bore single socketed, in any length with rubber ring joints laid in trenches or in floors complete all as specified and as directed.

Dismantling of CI drain pipe, 75 mm dia, jointed in cement mortar and taking out trenches complete all as specified and as directed

S&F PVC (SWR) pipes 75mm bore single socketed, in any length with rubber ring joints laid in trenches or in floors complete all as specified and as directed.

S&F Urinal spreader of PTMT any colour for fixing with 15 mm dia pipe. (Minimum weight 60gms) complete all as specified and as directed

S&F in repairs Vitreous China Urinal, Half stall type, white (excluding flushing cistern, flush pipe & waste pipe) complete all as specified and as directed

S&F in repair vitreous china urinal partition white of size 310x700 mm complete all as specified and as directed

Dismantling water tanks exceeding 1000 & not exceeding 2000 litres complete all as specified and as directed

S&F Rotational moulded polythene water storage tanks (Cylinderical vertical with closed top) hoisted and fixed in position 2000 ltrs, including PVC float valve 20 mm bore, high pressure with polythene ball & float complete all as specified and as directed

M&L for granite (of any type) 15-20mm work (table rubbed and polished) in steps, jambs, pillars, window-cills, cooking platforms,urinal partition and like in cement mortar (1:4) including pointing in white cement (1:2) using marble dust with admixture of pigment to match with shade of granite complete all as specified and as directed

M&L for rounding to edges of stone slabs (one edge) as in steps, cooking platform and other similar situation complete all as specified and as directed

Dismantling of ceiling boards of any thickness, including cover fillets complete all as specified and as directed

S&F Anodised aluminium snap grid frame work for false ceiling size of grid 605 x 605 mm with anodized aluminum angle of size 40mm x 25mm x 2mm thick weighing 0.36 Kg per running meter and anodized aluminum main and cross T of size 36.50 x 23.50 x 1.50 mm thick weighing 0.254 Kg per running meter and 23.50 x 23.50 x 1.50 mm thick weighing 0.202 Kg per running meter respectively including hangers 6 mm dia G.I (upto 1200 mm length )adjusting level fixed to roof slabs by means of ceiling cleats made out of G.I flat 40 X 3 mm size 60 mm long complete all as specified and as directed

S&F PVC False ceiling consisting of 600mmx600mm,10mm(+or - 0.25) thick plain colour PVC sheet manufactured by an ISO-9001-2008 certified company complete all as specified and as directed

Taking down cement plaster on brick or stone wall etc., including racking out joints, hacking for key, scrubbing down with water, etc complete all as specified and as directed.

M&L for applying two coats of acrylic emulsion exterior paint (anti fungal painting) over a coat of acrylic emulsion primer on new surfaces of walls including preparation of surface of any description complete all as specified and as directed

M&L for applying two coats of acrylic emulsion exterior paint (anti fungal painting) over a coat of acrylic emulsion primer on walls including complete removal of existing treatment all as specified and as directed.

M&L for applying two coats of oil-bound distemper over a coat of alkali-resistant primer on new plastered surfaces including necessary preparation to surfaces complete all as specified and as directed.

M & L for complete removal of existing treatment on walls and applying two coats of oil-bound distemper on old plastered surfaces including necessary preparation to surfaces complete all as specified and as directed

M&L for applying two coats of white wash on old ceiling surface including preparation of surface complete all as specified and as directed

M&L for preparation of old surface of wall and applying two coat of white wash, complete all as specified and as directed

M&L for preparation of new surface of wall and applying three coat of white wash, complete all as specified and as directed

M & L for water proofing treatment using 4 mm thick APP modified membrane consisting five layer membrane with features as specified weighing not less than 3.5 Kgs per Sqm laid over a coat of cold applied bituminous primer @ 0.4 Liters per sqm on surface provide, a layer of APP modified membrane by torching applications including sealing the over lap while torching with 100 mm on length side and 100 mm wide side as per manufacturer instructions including 10 mm thick plaster in cement mortar 1:4 mixed with SBR latex @ 200 ml/bag of cement curved well before laying of membrane all as per manufacturer instructions and provide a finishing coat with solar reflective bituminous aluminum paint @ 0.1 Kgs per sqm as prescribed by manufacture membrane to the satisfaction of Engineer-in-Charge. Notes:- (i) Irrespective of lap the net covered area will only be measured for payment. (ii) The quoted rate is deemed to be inclusive of primer, APP membrane and SBR Latex

Schedule 'A' Part II - E/M portion

Taking down copper/aluminium point wiring (light, fan, socket or power) complete, including fixture and fittings such as switches, ceiling roses,pendants, regulators, sockets, light fitting etc removing materials to store for keeping in safe custody or for taking credit (credit for above items should be made as per conditions separately) including making good disturbed surfaces of walls, floors, etc as per existing complete all as specified and as directed

M&L for point wiring complete with 1100 V grade 1.5 Sq mm single core PVC insulated unsheathed multi stranded copper conductor cable drawn through in and including PVC casing and casing (surface) ISI marked with all accessories concealed in wall, ceiling including 1.5 sq mm single core PVC insulated and unsheathed copper conductor cable as earth continuity wire including testing all as specified and directed by Engineer-in-Charge for one light point, fan point, exhaust fan point controlled by one switch complete all as specified and as directed

All as per item No 90 hereinbefore but one 5 pin switch socket outlet 5 Amps on independent board controlled by one switch complete all as specified and as directed

All as per item No 90 here in before but one 6 pin socket outlet 15 Amps independent/metal plug and socket with cables 4 sq mm size copper PVC insulated cable multi stranded and 4 sq mm cable conductor for earth wire complete all as specified and as directed

M&L for point wiring complete with 1100 V grade 1.5 Sq mm single core PVC insulated unsheathed multi stranded copper conductor cable drawn through in and including non metalic rigid (PVC) Concealed conduit of dia 20mm ISI marked with all accessories concealed in wall, ceiling including 1.5 sq mm single core PVC insulated and unsheathed copper conductor cable as earth continuity wire including testing all as specified and directed by Engineer-in-Charge for one light point, fan point, exhaust fan point controlled by one switch complete all as specified and as directed.

All as per item No 93 here in before but one 5 pin switch socket outlet 5 Amps on independent board controlled by one switch complete all as specified and as directed.

All as per item No 93 here in before but one 6 pin socket outlet 15 Amps independent/metal plug and socket with cables 4 sq mm size copper PVC insulated cable multi stranded and 4 sq mm cable conductor for earth wire complete all as specified and as directed.

S&F Switch piano flush button single pole one way 05 Amps complete all as specified and as directed

S&F Switch socket combination 2 in 1, 3/5 pin 5 Amp flush type universal complete all as specified and as directed

S&F Switch socket combination 2 in 1, 3/5 pin 15 Amp flush type universal complete all as specified and as directed

S&F Stepped type electronic fan regulator electronic flush type 300 watt existing phenolic laminated sheet etc including removal of old complete all as specified and as directed

Taking down carefully existing ceiling fan from any height of any sweep & make with down rod and refixing the same by replacing the existing short length down rod with 750mm long new down rod with suitable shackle complete including replacement of PVC flexible wire not less than 1.5 m length from the ceiling rose to fan complete all as directed by Engr-in-charge. Note: Item rate quoted includes the cost of taking down existing ceiling fan, new down rod 750 mm long with shackle clamp & connecting cable /wire refixing complete all as specified and as directed

S & F Ceiling Fan 1200 mm sweep air delivery 220 cmm complete all as specified and as directed

S&F 25W 4ft long LED batten light fitting with 2.5 KV voltage E surge protection ,PF >0.9 complete with all accessories internally pre-wired and including connecting up with twin core twisted flexible copper conductor cable of suitable size complete all as specified and as directed

S&F Recess mounting LED fittings 36 watts including suitable electronic driver (having Surge Protection), system Luminous efficiency (Im/w)> 100, Colour temp(CCT) 4000k, suitable for 600 mm X 600 mm X modular/POP/Gypsum ceiling, luminaire with white acrylic flat light dissipator, 230V, high quality indoor batten with aluminium extrusion in all accessories internally prewised and including connecting up with twin copper twisted flexible copper conductor cable with suitable size complete all as specified and as directed

S&F Sub main wiring with 4 sq mm 2 Runs of single core multi stranded PVC insulated unsheathed cable 1100 Volts with copper conductor drawn in and including PVC caping and casing with all accessories such as tees, elbows, junction box reducers etc as required along with 1 Run of 4 sq mm single core PVC insulated unsheathed copper conductor as continuous earth wire and connecting to main switch board \ Distribution Board and testing on completion including taking down old sub main wiring and type of conduit complete all as specified and as directed Note :- Three runs of 4 sqmm cable and one run of PVC casing capping/conduit shall be measured as one unit

S&F Sub main wiring with 6 sq mm 2 Runs of single core multi stranded PVC insulated unsheathed cable 1100 Volts with copper conductor drawn in and including PVC caping and casing with all accessories such as tees, elbows, junction box reducers etc as required along with 1 Run of 6 sq mm single core PVC insulated unsheathed copper conductor as continuous earth wire and connecting to main switch board Distribution Board and testing on completion including taking down old sub main wiring and type of conduit complete all as specified and as directed Note :- Three runs of 6 sqmm cable and one run of PVC casing capping/conduit shall be measured as one unit

S&F Sub main wiring with 10 sqmm 2 Runs of single core multi stranded PVC in related unsheathed cable 1100 Volts with copper conductor drawn in and including PVC caping and casing with all accessories such as tees, elbows, junction box reducers etc as required along with 1 Run of 10 sq mm single core PVC insulated unsheathed copper conductor as continuous earth wire and connecting to main DB to switch board \ Distribution Board and testing on completion including taking down old sub main wiring and type of conduit complete all as specified and as directed Note :- Three runs of 10 sqmm cable and one run of PVC casing capping/conduit shall be measured as one unit

S&F Sheet metal enclosure single pole and neutral with a two pin and earth plug and socket complete with and including one single pole MCB 16 Amps, 240 Volts complete complete all as specified and as directed

S&F Sheet metal enclosure (DB) TPN 4 way ,415 V, double door with 200 Amps rated bus bars for MCBs with IP 54- IK 09 complete all as specified and as directed

S&F Sheet metal enclosure (DB) SPN, 12 way ,240 V double door with 100 Amp rated Copper bus bar for MCB's with IP 54- IK 09 complete all as specified and as directed

S&F MCB triple pole and neutral, 63 Amp, 415 Volts, 'C' series 10 ΚΑ complete all as specified and as directed

S&F MCB, single pole & neutral, 40-63 Amp, 240 Volts, 'C' Curve 10KA complete all as specified and as directed

S&F MCB, single pole, 6-32 Amp, 240 Volts, 'C' Curve 10KA complete all as specified and as directed

M&L for earthing complete with GI steel earth plate electrode 60 cm x 60 cm x 6 mm thick buried directly in ground (earth pit not less than 2.25 m deep below ground level) with top edge of the plate not less than 1.5m below normal ground level, connected to Gl wire 4 mm dia by means of bolts, nuts, check nuts and washers of GI or steel including necessary earth work and excavation of in any type of strata, PCC 1:3:6 type C-2 GI tubing 20 mm dia for watering and 15mm dia GI tubing for protection of wire etc all as per electrical plate No.3 of SSR part I including connecting to electrical equipments and testing on completion. Note:GI wire 4mm upto 7.5m is deemed to be included under quoted rate

S & F LED building security street light 30W IP 65 with 10KV surge protection including suitable size of Gl pipe 1.2 m long bent to required shape, clamps, nut ,bolts and making electrical connection to the fitting with suitable size of service wire complete all as specified and as directed

Provision of hole on existing wall for fixing of exhaust fan 450/400 mm sweep including M&L for plaster at disturbed surfaces and making good with colour wash and grouting of stud bolts etc complete all as specified and as directed

S & F Ceiling fan down rod 750 mm long complete with fixing arrangement on angle iron complete all as specified and as directed

S&F Ceiling rose 3 terminal 230 volts, PVC polycarbonate, isolated body completed all as specified and as directed.

S&F Wall mounted fan 400mm sweep 230V, AC, SP with all accessories and fixing arrangement complete all as specified and as directed

S&F Exhaust fan 450 mm sweep (metal body), heavy duty, 230 volts with louvers complete all as specified and as directed

SHREE THATWAMASSY CONSTRUCTIONS PRIVATE LIMITED

M/S jvsr constructions

Super Construction

pk janardhanan

M/S G.N.POWAR

M/S DUBAL CONSTRUCTION

M/s Gayatri Contruction Co.