Military Engineer Services-MES has published Tender For Maintenance/Repairs Of Building No. 14 (Winch House), Bldg No.7 At Slipway At Naval Dockyard Visakhapatnam Under Ge (I) (Dm) Visakhapatnam. Submission Date for this Tender is 29-02-2024. Lifting Equipment Tenders in visakhapatnam Karnataka. Bidders can get complete Tender details and download the document.
| Sr No | CorrigendumDate | Corrignedum | CorrigendumType | NewSubmissionDate |
| 1 | 22-Feb-2024 | Bid Auto Extn Corrigendum | Bid Auto Extn Corrigendum | 29-02-2024 |
| Sl. No. | Item Description |
| 1 | Chipping and removing of spalled concrete,craked,porous/Micro concrete above 25mmto 100mm: Chipping and removing of spalled concrete,craked,porous/Micro concrete andweekconcrete ,at allheigths and depths,upto a depth of 25mm behind thereinforcement rods or depth of cabonation whichever is deeper andcleaning of the reinforcementbarsand exposed concrete to remove scale by chipping,wire brushing ,emery sheets etc to enable themesurement of the reduced dia of the bars, application of zinc primer to the bars on all sides of the reinforcement and application opfepoxy bonding agent to exposedold concrete surfaces. Leaddistanceshall be 50m from ground level to unloading location. This also includes the chipping and removal of gunning work carried out recently to check the reinforcement in order to decide on the requirement and addition of reinforcement . Payment towards application of zinc primer and epoxy bonding agent shall be paid in respective items rate of the contract. Scope including menpower, machinery, tools and consumables etc , to complete the job as per direction Note : Superfical area of the concrete is measured. |
| 2 | Bond coat: Applying zinc primer to the bars on all sides of the reinforcement and application of epoxy bonding agent to of acrylic emulsion bonding agent (or) Epoxy bonding agent. This application shall be carried out for concrete structural bonding agent between old concrete surface to new concreteing. Note : Superfical area of the concrete is measured |
| 3 | Polymer Modified concrete: Providing and applying polymer modified cement concrte (1:1:2) in specfied ratio by using 15% polymer and 53 grade cement to RCC surfaces in case the damaged thickness of RCC exceeds 30mm, the thickness assumed max upto 100mm. etc complete as instructed and directed by Client/ Consultant |
| 4 | Anti Caronation coating at out side of the concrete surface: Acrylic based plasto-elastic, crack - bridging protective coating system. Over the entire concrete surface including materials, machinery, labour tools etc all completeNote : Superfical area of the concrete is measured. |
| 5 | Grouting: A shrinkage free low viscos epoxy resin based injection of epoxy resin (wet and submerged cracks) apply of nozzles to be fixed shrinkage free moisture insentive epoxy resin free flow grout Note : Superfical area of the concrete is measured. |
| 6 | Drilling and fixing of copper nozzels in RC members : Drilling 10mm dia upto 300mm deep holes as required at site not less than 04 Nos. in structural members horizentally and vertically in stagged manner at the intervals as per specfications and drawings. Clean the holes by hair blower prior to fixing nozzels and insert 8mm dia. copper nozzels in holes for repair work and strengthening work of existing structure, materials machinery and menpower inclung etc, completed as per the direction of Engr-in-Charge. Injection of chemical grout will be paid separate line item. Note : Superfical area of the concrete is measured. |
| 7 | Ceiling of Cracks : Supply and apply a solvent -free, moisture tolerant, thixotropic, structural two-part adhisive.Mortar and concrete must be older than 28 days (depends on minimal requirement of strengths). Verify the substarte strength (concrete, masonary, natural stone). The substrate surface (all types) must be clean, dry and free from contaminants such as dirt,iol,grease, existing surface treatment and coatings etc. Steel substracts shall be removed. When using a thin layer adhesive, apply the mixed adhesive to the prepared surface with a spatula, trowel, notched towel, (or with hands protected with gloves). When applying as a repair mortar use form work. When using for bonding metal profiles onto vertical surfaces, support and press uniformly using props fro at least 12 hours, depending on the thickness applied (not more than 5mm) and the room temperature. Once hardened check the adhesion will be checked by tapping with a hammer. |
| 8 | M&L fornew reinforcement bars to the existing RCC member by using lokfixcomponent chemical by drilling the 150mm deep hole of 16 mm dia and fill the chemical as per manufacturer instructions and as directed by Engr in Carge .Note : TMT bars will be measured and paid under separate item of schedule. |
| 9 | Dismantling structural steel work of any description including doors, railing, gates, trusses complete complete all as specified and directed. |
| 10 | S & F for rolled mild steel plain or chequred plates confirming to Fe-290, Gde E-165welded, riveted, boltedattachment to supporting structure of capstan, duct covers, valve pit access platform and working in a confined area including making good the disturbed portion of concrete surfaces with 1:1 1/2 :3 type A0 using 12.5mm stone aggregate complete all as specified and directed. |
| 11 | S & F structural steel framed work such as angle, channel, I beams, etc cut to shape, including bending and welding angles as necessary confirming to Fe-290, Gde E-165 as in supporting structure of valley gutters, duct covers, platforms (0 to -15m level) and capstan,ladders framed balusters, walk ways, railings, cable duct covers, lifting arrengements with pulleys, nosing angle and similar works; including making good the disturbed portion of concrete surfaces with 1:1 1/2 :3 type A0 using 12.5mm stone aggregate complete all as specified and directed. |
| 12 | M & L for preparation of newsurfaces of steel of any description over 10cm width or girth and applying two coats of chlorinated rubber paint over a coat of zinc chrome primer complete. |
| 13 | Dismantling floor, hearth or wall tiling or stone slabs of any description and in any postion including cement mortar bedding (but not backing), removing and rubbish off the premises and removing the debries outside from the Dockyard premises all as specified and directed. |
| 14 | M&L for 40mm thick cement concrete type "B-0" 1:2:4 using 12.5mm graded stone aggregate as in flooring all as specified and directed. |
| 15 | M&L for Light shade Vitrified Ceramic tiles 8 to 10 mm thick (square/ rectangular) polished, area of each tiles not exceeding 0.36 sqm, in floors etc. set and jointed in neat cement slurry and pointed in white or coloured cement to match laid over 15mm thick cement mortor (1:6) screed bed complete all as specified and directed. |
| 16 | M&L for coloured non skid ceramic tiles 7mm to 8mmthick (square or rectangular) of area exc 0.18 but n.exc 0.38 Sq.m in floor set and jointed in neat cement slurry and pointed incoloured cement to match laid over and including cement screed 15mm thick in CM 1:6 all as specified and directed. |
| 17 | M & L for coloured glazed ceramic tiles 350 x 250 x 7 mm /450X300X7/8 mm thickin dado set and jointed in neat cement slurry and pointed in coloured cement to match fixed over incl rendering in CM 1:4, 10mm thick all as specified and directed. |
| 18 | M&L for Marble work 18 to 20mm thick (table rubbed and polished) in steps, jambs, pillars, windowcills,cooking platforms and like in cement mortar (1:4) including pointing in white cement (1:2) using marble dust with admixture of pigment to match with marble shade of Makrana doogri complete all as specfied and directed |
| 19 | Demoliton brick work or stone masonry built in cement mortar including all quoins , arches , pillars etc and removing the debries to a distance 5km away from the Dockyard premises all as specified and directed. |
| 20 | M&L forPre cast cement concrete type1:3:6 type C-1 (20mm graded stone aggregate) block masonry with solid blocks exc 10 cm in width and setting in cement mortar 1:4complete all as specified and directed. |
| 21 | Taking down cement plaster onwalls/Ceiling etc including racking out joints hacking for key scrubbing down with water and removing the debries away from the Dockyard premises all as specified and directed. |
| 22 | M&L rendering 10 mm thick in CM (1:6) on fair faces of brick work or concrete surfaces and finishing the surface even and smooth with out using extra cement i Note :- The work shall be executed at a height 8 to 15mtr and the contractor has to provide scaffolding etc wherever necessary. The unit rate quoted shall be deemed to included for the same. |
| 23 | M&L rendering 15 mm thick in CM (1:4) on fair faces of brick work or concrete surfaces and finishing the surface even and smooth with out using extra cement with WPCall as specified and directed. |
| 24 | M&L rendering 10mm thick cement plaster 1:3 on fair faces of brick work or concrete surfaces of ceilings finished even & smooth(without using extra cement) all as specified and directed. |
| 25 | Supply only integral water proofing compound. |
| 26 | Dismantling wall and ceiling boards (fibre, pulp, insulation, etc.) or insulation boards/slabs/ blankets, any thickness, including cover fillets all specified and directed. |
| 27 | S&Fanodised aluminium snap grid frame work of size 605x605mmusing main and cross tee of size 15mm x 15mm 1.5mm ( weight not less than 0.12 kg / Rm)and wall angle of size 40mm x 25mm x 2mm( weight not less than 0.36 kg / Rm) and25 mm thick Perforated particle board/tiles for insula-tion and accoustic purposes, 60x60 cm in size, fixed with scrwesor with staples on snap grid completein ceiling withscrews to aluminum frame work in ceilings with hanger 6mm dia GI (up to 1200mm length) adjusting level fixed to roof slab by means of ceilng cleats made out of GI flat 40x 3mm size 60mm long and expansion hold fastners 12.5mm dia 40mm long complete , including cover filletsand all as specified and directed. |
| 28 | Taking down chowkats or frames exc 1.5 Sqm but not exc 4 Sqm each (Without taking off shutters from the frame) all as specified and directed. |
| 29 | All as per item No.28.00 above, but not exc 1.5 Sqm each |
| 30 | Supply and fix 2nd class hard wood plain, solid, straight chowkats and frames, wrought, framed on the solid rounded or chamfered, put together with glue pinned at joints all as specified and directed. |
| 31 | S&F 2nd class hard wood 40mm thick plain, framed panelled shuttters ( 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 all as specified and directed. |
| 32 | S&Ffor factory made second class hard wood 35mm thick plain framed paelled shutters (two panelled ) with lock rails and panel of 9mm BWP commercial ply or 12mm veneered particle board with commercial veneerign o both facesThe size of rail and stile as per IS:1003 (Part I) Kiln seasoend and chemically pressure treatedall as specified and directed |
| 33 | Forming jambs etc., to opening in brick masonry,including cutting, toothing and properly bonding into old work, also facing, jointing and pointing to match existing work complete new work, built in cement mortar 1:6 all as specified and directed. |
| 34 | M&L for PCC 1:3:6 type C1 usig 20mm graded stone aggregates as in anchoring hold fast bed plates etc complete all as specified and directed |
| 35 | S&F 100mm SS butt hinges, medium weight, cold rolled and fixed to wooden or steel framed all as specified and directed. |
| 36 | S&F 200mm aluminium anodized barrel tower bolt of extruded section all as specified and direced. |
| 37 | S&F 125mm aluminium anodized handles, cast type all as specified and direced. |
| 38 | S&F 250mm aluminium alloy, anodized, sliding door bolt with hasp, staple (bolt type) and fixing clips of sheet, cast or extruded sections and fixing bolts and sliding bolts of extruced sections or cast aluminium alloy all as specified and directed. |
| 39 | Supply and fixaluminium door shutter with chowkats made out of hollow aluminium sections as mentioned below, each shutter having 2 Nos. ‘D’ type aluminium handles of 200 mm long,2 Nos. aluminium tower bolts of 200 mm long and 1 No. mortice lock of 6 lever with key in duplicate, regulated by double action hydraulic floor door spring, shutter partly glazed with 5.5 mm thick sheet glass and partly paneled with 12 mm thick pre-laminated particle board fixed with glazing clips, rubber beadings and aluminium beading all as specified and directed: Chowkat size:101.60 x 44.45 x 2.40 mm (1.608 Kg./RM appx.) ShutterTop rail: 114.30 x 2.15 mm thick (1.836 Kg./RMappx.) Bottom rail :150.00 x 2.20 mm thick (2.376 Kg./RM appx.) Middle rail:83.50 x 1.70 mm thick (1.243 Kg./RM appx.) Vertical rail :85.00 x 1.80 mm thick (1.302 Kg./RM appx.) |
| 40 | Providing and fixing factory made uPVC white colour sliding window exceeding 2.00 Sqm .Three tack made of extruded profiles with wall thickness of 2.3mm (+ -0.2mm). Window profile with hollow section with multi chamber. Frame (88mmx52mm), sliding sash (42mmx67mm). Sliding mesh sash (42mmx57mm) sliding interlock (One vertical length in each shutters) (45.5mmx28mm, Glzing bead (24.5mmx16mm) will be mitred cut and fusionwelded at all corners, including drilling of holes for fixing hardware and drainage of water etc. making arrangement for fixing of hardware. EPDM gasket, 1.2+, -0.2mm thick galvanised steel frame (30mmx18mm) 2 Nos, sliding sash (30mmx18mm), sliding mesh sash(26mmx10mm) profile to be inserted in required profile,frame will be fixed to the wall with 8 mmx100mm long fasteners, Hardware (touch lock of zinc alloyed (white powder coated), steel roller system. Stainlesssteel wire cloth 0.36mm nominal dia of wire and average width of aprature 1.40mm and required accessories. Note :- The unit rate quoted by contractor excludes cost of glass and includes all other connected accessories. Net opening will be measured for payment purpose) |
| 41 | All as per item No.40.00 above, but not exc 2.00 Sqm each |
| 42 | Material and labour for partition wall (Pannels of 1.44 sqm (approx) made out of aluminium anodized standard hollow sections 63.50 X 38.10 X 1.95mm thick snap fit beadings, standard rubber gasket,5.5mm thick sheet glass and 6mm thick PVC sheet, interior grade, pre-laminated one side with decorative choice lamination and other side balancing light grey lamination complete all as specified and directed. Note :-The scope of work include for taking down existing damaged aluminium door/window/grill/panels and the unit rate quoted shall be deemed to include for the same. |
| 43 | Supply and stick solar control film 50 microns thick on glass panes as per manufacturer’s instructions all as specified and directed. |
| 44 | S&F in repair Double action floor spring hydraulically regulated made up of mininium 1.25 mm thick alumiium alloy sheet foundation box , main body with stainless steel cover, governig pivot made of brass, other parts made of mild steelheavy duty including taking down old floor spring complete all as specified and directed. |
| 45 | S & F in repair Aluminium body door closer hydraulically regulated, designation No. 3 universal type, suitable for door shutters of weight between 61 to 80 Kg complete all as specified and directed. |
| 46 | Demolition of textile covering and including all padding concrete over RCC slab over roof, including removal of waste material away from Dockyard premises complete all as specified. |
| 47 | M&L providing, cement concrete Type B1 1:2:4 (Using 20mm graded stone aggregate) as in roof padding concrete and kerbs or mud stops, rounded or chamfered on edgescomplete all as specified and directed. |
| 48 | M&L for 10mm thick cement plaster over padding concrete cement mortar 1:4 with water proofing compoundas per manufacture instructions by weight of cement and finish the surface even and smooth with out using extra cement complete all as specified and directed. |
| 49 | M&L for applying evenly a tack coat of industrial bitumen 85/25 at the rate of 1.20 kg per Sqm including cleaning of surfaces all as specified and directed. |
| 50 | M&L for APP based polymeric membrane minimum weighing 3kg/sqm and minimum 3mm thick reinforced with polyster non wove fabric (wt. not less than 150 gms/sqm) shall be laid over entire roof surface and on vertical surface up to groves with other laps of 100mm.The over lap shall be sealed by flamescomplete all as specified. |
| 51 | M&L bitumastic gola filling in crumple joints , with 80/25 buitmen and coarse sand mixture 1:3 by weight 8cm x 8cm at junction of roofing to vertcal surfacescomplete all as specified and directed. |
| 52 | Providingdouble steel scaffolding for the outer surfaces of the building to provide platform to the workmen complete all as specfied and directed.Note : The superficial area of the building cover is measured |
| 53 | Demolition of reinforced cement concrete of any description and in any position not otherwise specifically provided for cut the reinforcement as required at site complete all as specfuied and directed |
| 54 | M&L for mild TMT bars 10mm dia and over cut to length, bent to shape required including binding with and incl mild steel wire (annealed) not less than 0.90mm diacomplete all as specified. |
| 55 | M&L for RCC Type B1 1:2:4(20 mm graded aggregate)Reinforced cement concrete (nominal mix) in chjja and like work complete all as specfied and dierected |
| 56 | M&L for Form work to soffits of suspended slabs such as roof slabs, floor slabs, landings and similar work; not exceeding 200mm thick (Horizontal or sloping) |
| 57 | Dismantling wrought iron or mild steel work of any description not otherwise provided for complete all as specified and directed. |
| 58 | M&L for framed work such as grills, gratings, etc.. with ends of bars shouldered and/or riveted, or forged into spikes; framed guard bars; barred iron doors, ladders, framed balusters; walk ways; railings, framework of water tanks and similar work conforming to Fe.290.Gde-E-165 complete all as specified and directed. |
| 59 | M&L for preparation of new surfaces of steel of any description over 10cm in width or girth and applying one coat of synthetic enamel paint over a coat of red oxide/ zinc chrome complete all as specified. |
| 60 | S & F for 2000 ltr capacity rotational moulded polye thylene water storage tanks (cylindrical vertical with closed top) hoisted and fixed in position all as specified in SSR Part I all as specified and directed. |
| 61 | M&L for preparation of newplastered surfaces of wall and applying two coatsof distemper oil emulsionover a coat of primer with one coat of3 mm th birla putty complete all as specified and directed. |
| 62 | M&L for complete removal of existing treatment on walls and applying two coatsof distemper oil emulsion over one coat of primer with one coat of3 mm thick birla putty complete all as specified and directed. |
| 63 | M&Lfor preparation of new plasteredsurfaces of ceiling and two coats of distempering with distemper oil emulsion over a coat of primerwith onecoat of 3 mm th birla putty complete all as specified and directed. |
| 64 | M&L for Complete removal of existing treatment on ceiling and applying two coatof distemper oil emulsion over one coat of primer with one coat of3 mm th birla putty complete all as specified and directed. |
| 65 | M&L for preparation of new plastered surfaces of walls and apply two coat of exterior weather proof emulsion over a coat of Alkaline resistance primer primer complete all as specified and directed ( in bldg height upto15 mtrs). |
| 66 | M&L for complete removal of existing treatment on walls and apply two coats of exterior weather proof emulsion over a coat of Alkaline resistance primer primer complete all as specified and directed. |
| 67 | M&L for preparation of old painted steel surfaces of any description over 10cm in width or girth and applying one coat of synthetic enamel paint over a coat of red oxide/ zinc chrome complete all as specified and directed. |
| 68 | S&F 110 mm dia PVC (SWR) pipes single socketed in any length with rubber ring joints fixed to walls including taking down of old rain water pipes complete all as specfied and directed. |
| 69 | S&F for 110mm dia PVC (SWR) bends any radius all as specified and directed. |
| 70 | S&F in repirs25mm bore galvanised steel tubes,medium grade including all necessary fittings Complete all as specfied and as directed |
| 71 | All as per item No. 70.00 above, but 20mm bore. |
| 72 | S&F in repairs 25mm bore Gun-metal, globe or gate valves, with iron wheel head, screwed both ends for iron pipe and fixed complete all as specfied and directed |
| 73 | All as per item No. 72.00 above, but 20mm bore. |
| 74 | Taking down exising steel rolling shutter incl hood cover pull and push type, n exc 15 sqm area of sides of clear opening and cleaning the sides of shutters suspension shafts, anti-guide channel and gearing all the moving parts rolling shutters and strengthening rolling shafts and replacement of bolts and nuts as required for smooth functioning of shutters and refixing the same including hood cover complete all as specified and directed. |
| 75 | All as per item No. 74.00 above, but gear operated type rolling shutters exc 15 sqm but nexc 30 sqm area and incl adjustment of gear assembly complete . |
| 76 | Repairs and servicing to rolling shutters by removal of wornout components such as hood covers, laths, ball bearing, helical wire springs, lock plates, shaft pipes and straightening of existing guide channels, laths, hood covers at required places including greasing and servising, refixing in the same openings complete all as specified and directed. |
| 77 | S&F in Repairs 1.15mm thick steel rolling shutters, with out ball bearing, as specified including top cover anchoring rod, hasp and staple, shaft, pipe, brackets,and one shop coat of primer, erected in position as indicated completewith bevel gear box and crank handle complete all as specified and directed. |
| 78 | S&F in repairs electrically operated, 1.15mm thick steel rolling shutters, area exc 15 sqm, with chain bearing wheel,and quide channels with out ball baring, as specified including top cover anchoring rod, hasp and staple, shaft, pipe, brackets,and one shop coat of primer, erected in position as indicated complete all as specified and directed. Note:- Electric motormeasured and paid separately under relevant item. |
| 79 | S&F Electric motor of cacity 3.70 Watt for rolling shutter including all necessary fitting complete all as specified and directed. |
| 80 | S&F in repairsball bearing for rolling shutters(ISI marked) for 40/50 mm dia pipe shaft complete all as specified and directed. |
| 81 | Material and labour for preparation of old painted steel surfaces of any description over 10 cm width or girth and applying one coat of synthetic enamel paint complete all as specified and directed. |
| 82 | Material and labour for preparation of oldpainted steel surfaces of any description over 10 cm width or girth and applying one coat of aluminiumpaint complete all as specified and directed. |
| 83 | M&Lfor preparation of newsteel surfaces of any description over 10 cm width or girth and applying two coats of aluminiumpaint complete all as specified and directed. |
| 84 | S&F in repairs mild steel lock plate & handles made out of MS flat iron 40x5mm incl welding (lock plate & handle should be replace of old damaged lock plate) and painting with two coats of synthetic enamel paintover a coat of zinc chromate primer complete all as specified and directed. |
| 85 | S&F in repairs mild steel helical wire springs (conforming to IS-6248-1970) for rolling shutters not exc 15sqmcomplete all as specified and directed. |
| 86 | All as per item No.85.00 above, but for shutter exc 15 sqm but not exc 30 sqm complete |
| 87 | S&Fin repairs MS gear box assembly complete incl connecting and fixing the gear box to wall with 4 Nos hexagonal bolts of 10mm dia and 100mm long complete including cutting into existing wall/pillar of brick work/RCC and filling back with PCC complete all as specified and directed. |
| 88 | S&F in repairs hood covers made out of mild steel sheets 0.90 to 1.00mm thick incl bending the sheet to the required shape and fixing the same to the rolling shutter bracket plate incl one coat ofzinc chromate primer and two coats of synthetic enamel paint complete all as specified and directed. |
| 89 | S&F in repairs mild steel pully for 32/40mm dia pipe ( of approved make) for rolling shutters complete all as specified and directed. |
| 90 | Supply only MS gear handle(of approved make) for gear operated rolling shutterscomplete all as specified and directed. |
| 91 | S&F in repairs inter locking lath section formed from rolled MS strips 1.15mm thick for shutters up to 3.5m widthcomplete all as specified and directed. |
| 92 | All as per item No. 91.00 above, but 1.15mm thick MS strips for shutter above 3.5m width complete |
| 93 | M/L in repairs MS wheel fitted with ball bearing and cir clip axle rod with spring washer and nut including welding and gas cutting complete for sliding doorweighing10kg each to make smooth movement complete all as specified and directed. |
| 94 | M/L forstraightening of bent / dented portion of sliding door including necessary welding complete all as specified and directed. |
| 95 | M/L for greasing the top and bottom guide rails of MS sliding door for smooth opening complete all as specified and directed. |
| 96 | M/L for guide pins of sliding door, removing the existing worn out pins and replace by new one including painting with two coat of aluminum paint over a coat of zinc chromate primer complete all as specified and directed. |
| 97 | Repairs to collapsible gate removal and replacement of worn out minor parts such as rivets, rollers whets, straightening of vertical channels and cleaning of rust including greasing and re fixing the same in position complete all as specified and directed. |
| 98 | S&F in repairs collapsible steel Gates top hung or bottom rest , consisting of channel pickets pivots flats bars top and bottom runners , brass handle etc. erected in position and securing runners with hold fasts and bracket complete all as specified and directed. |
| 99 | M&L for strctural steel work as in roof truss (framed), trussed, purlins, rails and fastenings and heavy bracket framing (Beam, Tee, Angle, Channelor flat sectios) including distance pieces, cleats etc.confirming to Fe-410-W(Gde-E-250) quality at any height complete all as specified and directed. |
| 100 | M&L for preparation of new steel surfaces of any descriptions over 10cm in width or girth and applying two coat of synthetic enamel paint over a coat ofzinc chromate at any height complete all as specified and directed. |
| 101 | Dismantling of Plain or corrugated steel sheeting, any gauge, thickness, includingainital or similar pattern roof coverings at any height complete all as specified and directed. |
| 102 | S&F Pre- painted galvatume 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 at any height complete all as specified and directed. |
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