Tender For As As To Bldg No P-56 (Hqef) Inside Naval Dockyard, Visakhapatnam; 1 Dismantling floor, hearth or wall tiling including cement mortar bedding (but not backing) and disposal ofdebris and rubbish to a distance n.exe 100 mcomplete all as specified and directed. 2 M & L for glazed, coloured, ceramic, tiles of size (350mm x 250 mm/450mm x 350mm/300mmx450mm) x6 to 7 mm thick, on vertical surfaces such as skirting, dados etc, including 10 mm thick bedding in cement mortor 1:4 and set & jointed in neat cement slurry & pointed in white or coloured cement to match with the shade of tiles complete all as specified and directed. 3 M&L for 25 mm thick PCC 1:2:4 type B0 (Using 12.5mm graded stone aggregate) as in levelling course complete all as specified and directed. 4 M & L for non-skid, ceramic, coloured tiles 7 to 8 mm thick (square/rectangular) area of each tile exc 0.18 sqm but n.exc 0.38 sqm, in floors etc, including 15 mm thick screed bed in cement mortor 1:6 and set & jointed in neat cement slurry and pointed in white or coloured cement to match with the shade of tiles complete all as specified and directed. 5 M & L for non-skid, ceramic, coloured tiles 7 to 8 mm thick (square/rectangular) area of each tile exc 0.18 sqm but n.exc 0.38 sqm, as in vertical surfaces as in skirting, dado etc, including 10 mm thick screed bed in cement mortor 1:4 and set & jointed in neat cement slurry and pointed in white or coloured cement to match with the shade of tiles complete all as specified and directed. 6 M & L for non-skid, ceramic, coloured tiles 7 to 8 mm thick (square/rectangular) area of each tile exc 0.11 sqm but n.exc 0.18 sqm, in floors etc, including 15 mm thick screed bed in cement mortor 1:6 and set & jointed in neat cement slurry and pointed in white or coloured cement to match with the shade of tiles complete all as specified and directed. 7 Taking down shutters of any description exc 1 sq. m and n exc 2 sq. m each complete all as specified and directed.. 8 Refixingshutters of any description exc 1 sq. m and n exc 2 sq. m each in same position complete all as specified and directed.. 9 Taking down chowkats or frame, n.exc 1.5 Sqm each with shutters (without taking off shutter from the frame) complete all as specified and directed. 10 Taking down Chowkhats or frames exc. 1.5 sq. mb ut not exc 4.0 sq. m eachbut with shutters (without taking off shutters from the frames) complete all as specified and directed. 11 S & F Factory made single extruded WPC (Wood Polymer Composite) solid door/ window/ Ceosetory windows & other Frames/ Chowkhat of size 65 x 100 mm comprising of virgin PVC polymer of K value 58-60 (Suspension Grade), calcium carbonate and natural fibers (wood powder/ rice husk/ wheat husk) and non toxic additives (maximum toxicity index of 12 for 100 gms) fabricated with miter joints after applying PVC solvent cement and screwed with full body threaded star headed SS screws having minimum frame density of 750 kg/ cum, screw withdrawal strength of 2200 N (Face) & 1100 N (Edge), minimum compressive strength of 58 N/mm2, modules of elasticity 900 N/mm2 and resistance to spread of flame of Class A category with property of being termite/borer proof, water/ moisture proof and fire retardant 152 SECTION 8 and fixed in position with MS hold fast/ lugs/SS dash fasteners of required dia and length complete as per direction of Engineer-in-Charge. (M.S. hold fast/ lugs or SS dash fasteners shall be paid for separately). Note: For WPC solid door/window frames, minus 5mm tolerance in dimension i.e. depth and width of profile shall be acceptable. Variation in profile dimensions on plus side shall be acceptable but no extra payment on this account shall be made. 12 S&F factory made single extruded WPC (Wood Polymer Composite) solid decorative type flush door shutter of size 30mm thick comprising of virgin polymer of K value 58-60 (Suspension Grade), calcium carbonate and natural fibers (wood powder/ rice husk/ wheat husk) and non toxic additives (maximum toxicity index of 12 for 100 gms) having minimum density of 650 kg/cum and screw withdrawal strength of 1800 N (Face) & 900 N (Edge), minimum compressive strength 50 N/mm2, modulus of elasticity 850 N/mm2 and resistance to spread of flame of Class A category with property of being termite/borer proof, water/moisture proof and fire retardant. WPC to be laminated with PVC foil of minimum 14 microns thick of approved design pasted with hot melt adhesive on both faces of shutter and fixing with stainless steel butt hinges of required size with necessary full body threaded star headed counter sunk S.S screws, all as per direction of Engineer- In- Charge. (Note: stainless steel butt hinges and necessary S.S screws shall be paid separately) 13 S&F factory made single extruded WPC (Wood Polymer Composite) solid decorative type flush door shutter of size 35mm thick comprising of virgin polymer of K value 58-60 (Suspension Grade), calcium carbonate and natural fibers (wood powder/ rice husk/ wheat husk) and non toxic additives (maximum toxicity index of 12 for 100 gms) having minimum density of 650 kg/cum and screw withdrawal strength of 1800 N (Face) & 900 N (Edge), minimum compressive strength 50 N/mm2, modulus of elasticity 850 N/mm2 and resistance to spread of flame of Class A category with property of being termite/borer proof, water/moisture proof and fire retardant. WPC to be laminated with PVC foil of minimum 14 microns thick of approved design pasted with hot melt adhesive on both faces of shutter and fixing with stainless steel butt hinges of required size with necessary full body threaded star headed counter sunk S.S screws, all as per direction of Engineer- In- Charge. (Note: stainless steel butt hinges and necessary S.S screws shall be paid separately) 14 S & F Powder coated aluminium (minimum thickness of powder coating 50 micron) work for doors, windows (three track), ventilators and partitions (Fixed portions) with extruded built up standard tubular sections/ appropriate Z sections and other sections of approved make conforming to IS: 733 and IS:1285, fixing with dash fasteners of required dia and size, including necessary filling up the gaps at junctions, i.e. at top, bottom and sides with required EPDM rubber/ neoprene gasket etc. Aluminium sections shall be smooth, rust free, straight, mitred and jointed mechanically wherever required including cleat angle, Aluminium snap beading for glazing/ paneling, C.P. brass/ stainless steel screws, all complete as per architectural drawings and the directions of Engineer-in-Charge. 15 S&F Powder coated Anodised aluminium grill (anodised transparent or dyed to required shade according to IS: 1868 with minimum anodic coating of grade AC 15) of approved design/pattern, with approved standard section and fixed to the existing window frame with C.P. brass/ stainless steel screws @ 200 mm centre to centre, including cutting the grill to proper opening size for fixing and operation of handles and fixing approved anodised aluminium standard section around the opening, all complete as per requirement and direction of Engineerin-charge complete all as specified and directed. 16 Supply only 4.8 mm thick Sheet glass, ordinary quality and glazing with oil putty in square exc 0.5 sq. m in each pane complete all as specified and directed. 17 Supply only Stainless steel wire cloth. 0.36 mm nominal dia of wire and average width of aperture 1.40 mm and fixed with stainless steel wire staples complete all as specified and directed. 18 S&F 100 mm size, butt hinges of medium weight cold rolled mild steel complete all as specified and directed. 19 S&F 150 mm size, extruded Aluminium alloy handles, fabricated type, anodised complete all as specified and directed. 20 S&F 150 mm long, Aluminium, anodised, barrel tower bolts of extruded section complete all as specified and directed. 21 S&F 300 mm long Aluminium alloy, anodised, sliding door bolt with hasp, staple (bolt type) and fixing clips of sheet, cast or extruded sections and fixing bolts and sliding bolts of extruded sections or cast-aluminium alloy complete all as specified and directed. 22 S & F in repairs vitreous china ware wash hand basin white, flat back, size 550 x 400 mm size(flat back or angle back type) including cutting for and pinning ends of brackets or errecting stand includingpedestal complete all as specified and as directed. 23 S & F in repair 15mm bore fancy type Pillar taps, cast copper alloy, 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. 24 S & F in repair 600mmx450mm bevelled edge mirror of selected quality glass, mounted on 6mm thick AC building board or commercial plywood and fixed to wooden plugs with chromium plated brass screws and cup washers complete all as specified and as directed. 25 S&F in repair sheet glass shelf assembly consisting of 5.5mm thick sheet glass shelf 12cm wide with chromium plated bracket guard and railing 60cm long complete all as specified and directed. 26 S&F in repair chromium plated tubular towel rail, 20mm dia, D type, 60cm long between flanges complete all as specified and directed. 27 Supply and fixing in repair vitreous china (White) wash down water closet pan (pedestal pattern) with P or S trap front or back inlet, fixing bolts (except flushing cistern and flush pipe) incl plastic water closet seat cover (White) and mild steel chromium plated or aluminium hinging device complete all as specified and directed by Engr-in-Charge. 28 S&F in repairs 10 ltrs capacity PVC valveless, syphonic action type, flushing cistern, low level, white, with inlet, ball valve, float and handle including brackets complete all as specified and directed. 29 S&F 32 mm dia, Flush pipe of polyethylene of low or high density or PVC.for low level cistern fixed complete all as specified and directed. 30 S & F in repairs health faucet (ABS Body) mild steel chromium plated suitable for 15 mm dia pipe with 1.25 metre long flexible tube and ABS wall hook including making connections and fixed in position complete in all respect including all necessary fittings complete all as specified and as directed. 31 S & F toilet paper holder with flap recessed type (Stainless Steel) fixed to wall with brass screw complete all as specified and directed. 32 S&FPVC connection 15mm size with PTMT nuts of length 450mm complete all as specified and directed by Engineer-in-Charge. 33 S&F in repair Vitreous China Urinal, Half stall type, of size 325 x 310 x 420 mm ,white (excluding flushing cistern, flush pipe) complete including providing and fixing plugs, bedding urinal against wall in cement mortar 1:2, securing urinal to plugs with and including 60mm long brass screws, pointing around urinal back in cement; fixing automatic flushing cistern with brackets, flush pipe, grating and Union for discharge pipe. (Exclusive of fixing supply pipe to flushing cistern, trap) but including waste pipe complete all as pecified and directed. 34 S&F in repairs 15mm bore fancy type chromium plated Bib taps, cast copper alloy with crutch or butterfly handle, screwed down, screwed for iron pipe or for brass ferrule complete all as specified and directed. 35 S & F in repairs 15mm bore fancy type chromium plated stop valves, cast copper alloy, screwed down, high pressure, with crutch or butterfly handle, screwed both ends for iron pipe or for unions complete all as specified and directed. 36 Taking up or down 15 mm bore steel tubing and connections, complete all as specified and as directed. 37 Taking up or down 20 mm bore steel tubing and connections, complete all as specified and directed. 38 Taking up or down 25 to 32 mm bore steel tubing and connections, complete all as specified and directed. 39 S&F 16 mm outer dia ,CPVC pipes SDR 11 & Plain CPVC SDR 11 fittings on walls/ceiling or laying in floors complete all asspecified and directed. 40 S&F 20 mm outer dia ,CPVC pipes SDR 11 & Plain CPVC SDR 11 fittings on walls/ceiling or laying in floors complete all asspecified and directed. 41 S&F 25 mm outer dia ,CPVC pipes SDR 11 & Plain CPVC SDR 11 fittings on walls/ceiling or laying in floors complete all asspecified and directed. 42 S&F 32 mm outer dia ,CPVC pipes SDR 11 & Plain CPVC SDR 11 fittings on walls/ceiling or laying in floors complete all asspecified and directed. 43 S&F in repair 50 mm bore unplasticized PVC (UPVC) pipes of pressure rating 10 kgf/sq. cm including all fittings and fixed to wall ,ceiling and laid on floor including testing complete all as specified and directed. 44 Taking down eaves gutters and rainwater pipes (any size or pattern), including all fittings, heads, shoes, bends, swan-necks, etccomplete all as directed. 45 S & F 110mm bore PVC [SWR] pipes single socketed, in any length with solvent cement/ rubber ring joints, fixed to walls with necessary brackets, clamps complete all as specified and as directed. 46 S&F 75mm bore PVC (SWR) pipes single socketed, in any length with rubber ring joints, laid in trenches or in floors complete all as specified and directed. 47 S&F 110mm bore PVC (SWR) pipes single socketed, in any length with rubber ring joints, laid in trenches or in floors complete all as specified and directed. 48 S&F 75 mmbore PVC (SWR) bends any radius complete all as specified and directed. 49 S&F 110mmbore PVC (SWR) bends any radius complete all as specified and directed. 50 S & F 75mm bore PVC (SWR) junction single, (Single T) equal or unequal complete all as specified and directed. 51 S & F 110 mm bore PVC (SWR) junction single, (Single T) equal or unequal complete all as specified and directed. 52 S & F 110mm bore PVC (SWR) branch piece, single (single Y) equal orunequal including jointing with solvent cement complete all as specified and as directed. 53 S & F 110 mm bore PVC [SWR] vent cowl including jointing with solvent cement complete all as specified and as directed. 54 S&F in repair PVC (SWR) floor trap 75mm sizeplain with grating including jointing with solvent cement complete all as specified and directed 55 M&L for preparation of surface by complete removal of exixting treatmentof old plastered or unplastered surfaces of walls and applying three coats of white wash complete all as specified and directed. 56 Demolition of un-reinforced cement Concrete of any description and in any position not otherwise specifically provided for and removing rubbish to outside MD land complete all as specified and directed. 57 M & L for filling polymer modified non shrinking slurry for sunken floors of toilets by drilling holes to a depth of 60mm by 20mm dia at 1 mtr interval and applying 2mm thick Acrylic polymer modified elastomeric waterproofing membrane coating over the concrete syrfaces by mixing Acrylic emulsion cement modifier and water based concrete bonding agent and water including testing the same for 48 hours as per the manufacturers technical specification complete all as specified and as directed Make: (a) Polymer modified non shrinking slurry = CEBEX 100 of M/S Fosroc or equivalent product ofM/s. Sika India Pvt. Ltd. or M/s. STP Ltd. orM/s. Choksey Chemicals Pvt. Ltd. or M/s Bostik India Pvt. Ltd. (b) Acrylic polymer modified elastomeric waterproofing membrane = Brushbond of M/S Fosroc or equivalent product ofM/s. Sika India Pvt. Ltd. or M/s. STP Ltd. orM/s. Choksey Chemicals Pvt. Ltd. or M/s Bostik India Pvt. Ltd. (C) Acrylic emulsion cement modifier and water based concrete bonding agent = NITO BOND BB with Brush bond powder of M/S Fosroc or equivalent product ofM/s. Sika India Pvt. Ltd. or M/s. STP Ltd. orM/s. Choksey Chemicals Pvt. Ltd. or M/s Bostik India Pvt. Ltd. 58 M & L for providing and filling light weight AAC bats (of size 40-60mm) with cement mortar mixed in the ratio 1:3:6 (1cement : 3 coarse sand : 6 block bats) including mixing of approved water proofing compound in recommended proportion, the laid AAC bats mix shall be well rammed and compacted as required; care shall be taken prior to filling all pipes passing through sunk portion such as the pipes are pressure tested by maintaining pressure for 24 Hours and junctions of pipes passing through walls, slabs are well grouted and sealed; this shall be tested by ponding water for required depth and maintaining for 75 Hourscomplete all as required and as directed. (Note: (I) Unit quoted rate shall deemed to include cost of AAC bats, cement mortar, top screed, labour charges for working at all levels, leads and heights, (ii) For payment the area of sunken slab and depth of filling including the thickness of screed shall be measured) 59 M&L for treating the existing pipe penetrations of any dia using non-shrink, free flowing, cementitious grout having compressive strength not exceeding 50 N/mm2 at 7 days and 60 N/mm2 at 28 days, flexural strength not exceeding 9N/mm2 @ 28 days and fresh wet density of the mixed grout must not exceed 2150 kg/m3 of Max grout PF. Further flashing the area using solvent based UV resistant polyurethane based waterproofing material having minimum tensile strength on 4 N/mm2 and minimum elongation of 800%. Complete all as specified and directed by Engineer-in-charge.Make: Sika Grout 214IN or equivalent product of Fosroc,Dr Fixit ,Thermax Ltd, Tiki tar 60 Taking down cement plaster on brick or stone walls, etc. including raking out joints, hacking for key, scrubbing down with water, etc Complete all as specified and directed by Engineer-in-charge.. 61 M & L for rendering 15 mm thick in two coats (10mm+5mm each) on other than fair faces of brick work or concrete surfaces in cement mortar 1:4,mixed with integral water proofing compoundwith weight of cement in top layer as per manufacturers instructions and finished the surface even and fair without using extra cement complete all as specified and directed. (Note : WPC shall be measured and paid separately against respective item). 62 Supply only integral water proofing compound (ISI marked) complete all as specified and directed. 63 M & L for rendering 5 mm thick in cement mortor 1:3 on concrete surfacesand finishing surfaces even and smooth without using extra cement complete all as specified and directed. 64 Providing and applying two component epoxy bonding agent (adhesive bond strength =11 N/Sqmm) for bonding fresh wet cementitious materials to existing cementitious surfaces bonding agent of approved brand including all necessary scaffolding, complete all as per manufacturer instruction .Make :- Nitobond EP (Std) of FOSROC or equivalents chemical of SIKA / STP / HINDCONas approved by GE. 65 Supply, materials and application of two component structural grade polymer modified reinstatement mortar 20 mm thick of minimium compressive strength 12N/mm2 in 1 day and 45N/mm2 in 28 days. Minimum flexural strength should be 8 N/mm2 in 28 days. Single component acrylic polymer emulsion to be applied @ 6-8 sqm/lit before the application of modified polymer mortar .The morter shall be applied in layers exc 5 mm thick in layers and including surface preparation . ( maximum coverage area 1.3 sqm at 10 mm thikness per 25.25 kg bag )Note:- This item shall be execution where shuttering is not possible or small patch repairs of structural elements .Make: (a) Acrylic polymer emulsion primer : Nitobond AR of FOSROC or equivalents solutions SIKA/STP/HINDCON as approved by GE. (b) Polymer modified reinstatement mortar:- Renderoc S2 of FOSROC or equivalents solutions SIKA/STP/HINDCON as approved by GE. 66 M&L for preparation of new platered surface of wall and applying two coats of weather proof 100% Premium acrylic emulsion paint having VOC less than 50 gm/litre, having dart pick up resistant, silicon enhanced, UV resistant and PU enhanced property over a coat of alkali resistant primer including applying one or more coat of wall care putty to a smooth surface including making good any undulations on the surfaces including all necessary scaffolding,complete all as specified and directed.Note :-Painting work shall be carried out acoording to Smart Painting procedure mentioned in PS 67 M & L for preparation old decorated external surfaces of wall, chajja, facia, ceiling parapet etc including cornices, pilasters etc including brooming or steel wire brushing, scrapping down smoke soot, moulds, moss, effloresecnt salts, trading oil, greasy spots and applying one coat of weather proof 100% Premium acrylic emulsion paint having VOC less than 50 gm/litre, having dart pick up resistant, silicon enhanced, UV resistant and PU enhanced property including all necessary scaffolding complete all as specified and as directed.Note :- Painting work shall be carried out acoording to Smart Painting procedure mentioned in PS 68 M&L for providing and filling three components compound (A) graded filler (B) E-Resins (C) thixotropic agents with adjustable consistency by varying the filler component having the density of 1.64 – 1.68gm/cc of Max treat EPG, after opening up in “V” groove manner covering the area of 300mm from central line of crack with the depth of 10mm complete all as specified and directed by Engineer-in-Charge . Make: Thermax Ltd, Tiki Tar Danosa (Pvt) Ltd , M/s Torchtar membranes & bitumen products Pvt Ltd. 69 Demolition of Reinforced Cement Concrete [reinforcement cut as required to facilitate demolition] of any description and in any position not otherwise specifically provided for and removing rubbish to a distance not exceeding 1.50 KM complete all as specified and as directed. 70 S & F high strength corrosion resistant TMT steel bars 10 mm dia., and over cut to length, bend to shape required, including cranking, bending spirally for hooping for columns, hooking ends and binding with and including mild steel wire (annealed) not less than 0.9 mm dia or securing with clips quality complete all as specified and directed. 71 M & L for Welding in repairs exceeding 2.5cm but not exceeding 5cm in length and thickness of metal welded exceeding 9mm and not exceeding 20mm complete all as specified and as directed. 72 Use and waste of formwork to Formwork to fins, louvers, fascia complete all as specified and directed. 73 M & L for formwork to faces of walls, retaining walls, abutments, parapets and staircase railings and similar work including attached pillasters, buttresses, etc.; vertical or to batter flat fair finished surface complete all as specified and directed. complete all as specified and directed. 74 M & L RCC- M-30 (Design Mix) in fins, fascias, louvres, parapets, and railings exc. 60cm in height, newels, balustrade, and the like complete all as specified and directed. 75 Useand waste offormwork to flat surfaces of chullah hoods, chajjas, troughs and similar items including edges complete all as specified and directed by Engineer-in-Charge. 76 M&L for RCC M-30 (Design Mix) using 20mm graded stone aggregate as in chajjascomplete all as specified and directed. 77 S & F, CPVCball valve/stope valve for fixing to 20 mm outer dia pipe with necessary plain CPVC fixing accesssories complete all as specified and directed. 78 All as per item no 77 butfor fixing to 25mm outer dia pipe 79 All as per item no 77 butfor fixing to 32 mm outer dia pipe 80 S & F in repairs Stack clamps out of 50 mm by 5 mm flat iron and 16mm dia round iron stays, including bolts and nuts and securing ends of stays to wall or roof for 100/110mm bore of pipe complete all as specified and directed. 81 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 directed. 82 M&L for Brick work with subclass ‘B’ old size fly ash bricks, straight or curved on plan exc 6m mean radius built in cement mortar (1:6) complete all as specified and directed . 83 M & L for rendering 15 mm thick on fair faces of brick work or concrete surfaces in cement mortar 1:4and finished the surfaces even and fair without using extra cement complete all as specified and directed. 84 M & L for Plain cement concrete 1:3:6, type C-2 (using 40mm graded stone aggregate) as in surface channel, drains etc complete all as specified and directed. 85 M & L for plain cement concrete (1:2:4), type B-0 (using 12.5mm graded stone aggregate) as in lintels upto 1.5m clear span, cills, steps; seismic and other similar bands, plinth courses, string courses, lacing courses, parapets and railings upto 60 cm in height, copings, kneelers, apex stones, bed plates, kerbs, water troughs and the like including weathering, slightly rounded or chamfered angles and throating, including necessary formwork complete all as specified and as directed. 86 M & L for rendering 15 mm thick on fair faces of brick work or concrete surfaces in cement mortar 1:4and finished the surfaces even and fair without using extra cement complete all as specified and directed. 87 M & L for Precast Reinforced Cement Concrete 1:2:4, type B-1 (using 20 mm graded stone aggregate) as in cover slab (For manhole etc), chullah hoods, chajjas, water troughs, mangers, shelves and similar articles with plain facesand set in cement mortar 1:4 including necessary form, moulds, etc complete all as specified and directed by the Engr-in-Charge. (Note : Reinforcement shall be measuredand paid separately) 88 Demolition and breaking 200mm bore drain pipes (SGSW/AC/RCC) set in cement mortar including cement concrete bedding and removal of debris/rubbles etc to a distance outside MD land complete all as specified and directed. (Note: Necessary axcavation and earth work shall be measured and paid seperately) 89 M & L Reinforced concrete pipes, class NP2, 200 mm bore, laid and jointed with collars complete all as specified and as directed. 90 M & L for Plain cement concrete 1:3:6, type C-2 (using 40 mm graded stone aggragate) as in concrete bed to drain pipes including packing under and haunching against the sides of pipes after they are laid and tested for 200 mm bore SGSW/RCC drain pipes complete all as specified and directed 91 Temporarily blocking of Inlet of septic tank and manhole, opening the cover and cleaning of septic tanks, sumps, manholes etc of any capacity, dewatering foul water andtaking out night soil, excreta, sludge, etc by pumping properly and removing and carrying the same to a distance upto outside MD land, burried underground (minimum 30 cm below ground level) including necessary excavation and earthwork in soft/loose soil for pits, returning, filling in including sprinkling bleaching powder @ not less than 0.75 Kg/Sqm and dressing of surplus soil around to slope as required including refixing the cover in position and cleaning the eitre area and making good damaged portion (if any) complete all as specified and directed. (Note : (i) Depth of sludge shall only be measured for volume.(ii): The cleaning work shall be carried out by Honey sucker tanker or similar transporter.)
