Construction of PTT and RET at Ranchi Airport

Amount

Earth work in excavation with hydraulic excavator of 0.9 cum bucket capacity including cutting and loading in tippers, trimming bottom and side slopes, in accordance with requirements of lines, grades and cross section, and transporting to the embankment/filling location within AAI premises, with all leads and lifts, including construction of embankment with excavated earth at locations by spreading soil in layer not excading 20 cm in loose including breaking chods, watering and consolidating each layer with 8 to 10 tome capacity vibratory roller to achieve min. 95% relative compaction (field density), required slope as per MoRTH specification and direction and satisfaction of Engg-in-charge.

Filling available excavated earth (excluding rock) in trenches, plinth, sides of foundations etc. in layers not exceeding 20cm in depth, consolidating each deposited layer by ramming and watering, for lifts and lead within airport premises.

Construction of embankment with available excavated earth/ordinary rock in layers not exceeding 20 cm in depth, breaking clods, watering, rolling each layer with earth compactor/ vibratory roller of minimum 8-12 tonne capacity including levelling to the required grade and camber, dressing etc. in embankments to achieve desired density as per the direction of Engineer-In-Charge. a) All kinds of Soil including ordinary rock. (As per MoRTH Specifications table 300-2)

Supplying and laying Moorum in layers of 20cm finished depth, breaking clods/ over size material, removal of stumps/roots and the like & watering, grading/levelling each layer with dozers/grader and rolling every layer with vibratory roller/ earth compactor of minimum 8-12 tonnes capacity and dressing to the required grade, camber and slope complete as per specifications and as directed by the Engineer-in-charge. (The item includes cost of work, payment of necessary royalty, carriage of Moorum upto work site for all leads and lifts involved. The work to be carried out as per MoRTH specifications. Payment to be made for compacted quantity only). (As per MoRTH Specifications)

Prepartion and consolidation of sub grade with power road roller/Vibratory road roller of 8 to 12 tonne capacity, dressing to camber and consolidating with road roller including making good the undulations etc. and re-rolling the sub grade.

Supplying and filling in plinth with sand under floors, including watering, ramming, consolidating and dressing complete.

Providing and laying in position cement concrete of specified grade excluding the cost of centering and shuttering - All work up to plinth level : 1:4:8 (1 Cement : 4 coarse sand : 8 graded stone aggregate 40 mm nominal size).

Providing and laying in position cement concrete of specified grade excluding the cost of centering and shuttering - All work up to plinth level : 1:3:6 (1 Cement : 3 coarse sand : 6 graded stone aggregate 20 mm nominal size)

Providing and laying in position cement concrete of specified grade excluding the cost of centering and shuttering - All work up to plinth level : 1:2:4 (1 Cement : 2 coarse sand (zone-III) : 4 graded stone aggregate 20 mm nominal size).

Brick work with clay flyash F.P.S. (non modular) brick of class designation 7.5 in foundation and plinth in: Cement mortar 1:6 (1 cement : 6 coarse sand).

12 mm cement plaster finished with a floating coat of neat cement of mix :1:4 (1 cement: 4 fine sand)

15 mm cement plaster on rough side of single or half brick wallfinished with a floating coat of neat cement of mix : 1:4 (1 cement: 4 fine sand)

Centering and shuttering including strutting, propping etc. and removal of form work for: Foundations, footings, bases of columns, etc. for mass concrete.

Centering and shuttering including strutting, propping etc. and removal of form for all heights: Suspended floors, roofs, landings, balconies and access platform.

Centering and shuttering including strutting, propping etc. and removal of form for: (a) Walls (any thickness) including attached pilasters, butteresses, plinth and string courses etc.

Steel reinforcement for R.C.C. work including straightening, cutting, bending, placing in position and binding all complete upto Plinth Level. (a). Thermo-Mechanically Treated bars of grade Fe-500D or more.

Providing and laying in position ready mixed or site batched design mix cement concrete for reinforced cement concrete work; using coarse aggregate and fine aggregate derived from natural sources, Portland Pozzolana / Ordinary Portland /Portland Slag cement, admixtures in recommended proportions as per IS: 9103 to accelerate / retard setting of concrete, to improve durability and workability without impairing strength; including pumping of concrete to site of laying, curing, carriage for all leads; but excluding the cost of centering, shuttering, finishing and reinforcement as per direction of the engineer-in-charge; for the following grades of concrete. Note: Extra cement up to 10% of the minimum specified cement content in design mix shall be payable separately. In case the cement content in design mix is more than 10% of the specified minimum cement content, the contractor shall have discretion to either re-design the mix or bear the cost of extra cement. All works upto plinth level. Concrete of M25 grade with minimum cement content of 330 kg /cum.

Providing and laying in position ready mixed or site batched design mix cement concrete for reinforced cement concrete work; using coarse aggregate and fine aggregate derived from natural sources, Portland Pozzolana / Ordinary Portland /Portland Slag cement, admixtures in recommended proportions as per IS: 9103 to accelerate / retard setting of concrete, to improve durability and workability without impairing strength; including pumping of concrete to site of laying, curing, carriage for all leads; but excluding the cost of centering, shuttering, finishing and reinforcement as per direction of the engineer-in-charge; for the following grades of concrete. Note: Extra cement up to 10% of the minimum specified cement content in design mix shall be payable separately. In case the cement content in design mix is more than 110% of the specified minimum cement content, the contractor shall have discretion to either re-design the mix or bear the cost of extra cement. All works upto plinth level. Concrete of M30 grade with minimum cement content of 350 kg /cum.

Providing, hoisting and fixing above plinth level up to floor five level precast reinforced cement concrete in lintels, beams and bressumers, including setting in cement mortar 1:3 (1 cement : 3 coarse sand), cost of required centering and shuttering but , excluding the cost of reinforcement, with 1:1.5:3 (1 cement : 1.5 coarse sand (zone-III) : 3 graded stone aggregate 20 mm nominal size derived from natural sources).

Add for using extra cement in the items of design mix over and above the specified cement content therein.

Steel work welded in built up sections/ framed work, including cutting, hoisting, fixing in position and applying a priming coat of approved steel primer using structural steel etc. as required. In gratings, frames, guard bar, ladder, railings, brackets, gates and similar works.

Preparation of granular sub-base by providing close graded material, conforming to specifications mixing in a mechanical mix plant at OMC, carriage of mixed material by mechanical transport to work site, for all leads and lifts, spreading in uniform layers of specified thickness with mechanical means including neatly leveling & dressing on prepared surface and compacting with vibratory power roller to achieve the desired density, complete and as per direction of Engineer-in-charge.

Providing, laying, spreading and compacting graded stone aggregate (size range 53 mm to 0.075 mm ) to wet mix macadam (WMM) specification including premixing the material with water at OMC in mechanical mix plant, carriage of mixed material by tipper to site, for all leads & lifts, laying in uniform layers with mechanical paver finisher in sub- base / base course on well prepared surface and compacting with vibratory roller of 8 to 10 tonne capacity to achieve the desired density, complete as per specifications and directions of Engineer-in-Charge.

Providing and laying dry lean cement concrete with coarse and fine aggregate conforming to IS:383, the size of coarse aggregate not exceeding 26.5 mm, aggregate cement ratio not to exceed 15:1, aggregate gradation after blending to be as per specifications, cement content not to be less than 150 Kg/cum, optimum moisture content to be determined during trial length construction, concrete strength not to be less than 10 MPa at 7 days, mixed in a batching plant, transported to site, laid with a paver with electronic sensor, compacting with 8-10 tonne vibratory roller, finishing and curing etc. complete as per specification and direction of Engineer-in-charge.

Providing and laying Pavement Quality Concrete (PQC) produced in a batching and mixing plant having a Characteristic flexural strength i.e. flexural strength of 4.1 MPa at 28 days using Ordinary Portland cement of 43/53 grade or Portland Pozzolana Cement or Portland Slag cement conforming as per relevant IS codes, to be mixed at site, with 0.5% Super plasticizer by mass of cementitious material, fine aggregate, graded stone aggregates of 40 mm nominal size in appropriate proportion as per specification and job mix formula, laid in panels as per drawings/design as approved by the Engineer-In-Charge using Slip Form Paver or Fixed form paver including anti friction layer, joint filler board, making necessary provision for expansion, dummy and construction joint including filling with Polysulphide sealant of approved make, curing and making profile, complete as per direction of Engineer-in-Charge and specifications. The item for execution shall include all operations making pavement for intended use but not limited to following: (i) Polyethylene sheet (White in color) of thickness 400 micron conforming to IS: 2508 with 6mm thick fine sand layer. (ii) Providing and laying in position for expansion joint, 25mm thick pre-cut Synthetic joint filler board of approved make conforming to IS:1838(part 3)-2011, 45 mm from top (to be removed at the time of filling of Polysulphide sealant). (iii) Mechanically cutting dummy joints 3mm wide x 1/3rd thickness of slab which is subsequently widened to 10mm for the top 25mm depth and construction joints 10mm wide x 25mm deep as per specification. (iv) Providing and laying in position Polysulphide sealant of approved make conforming to BS-5212-1990 or IS: 11433-1995 in expansion/ construction / dummy joints including rounding off edges, applying 2 coats of approved primer compatible with the brand of Polysulphide and preparing the surface and applying masking tape along the edge of joint to prevent accidental spillage of sealant on top surface and to give neat finish to the sealant and removing the masking tape after application of sealant etc. as per the details below: (a) Expansion Joints of size 25 mm wide and 10 mm deep over 30mm dia expanded closed-cell Polyethylene foam back-up/backer rod of minimum density 22 Kg/Cum, as per manufacturer’s specifications and sketch at Appendix-‘A’. (b) Construction Joints of size 10 mm wide and 10 mm deep over 12mm dia expanded closed-cell Polyethylene foam back-up/backer rod of minimum density 22 Kg/Cum, as per manufacturer’s specifications and sketch at Appendix-‘A’. (c) Dummy Joints of size 10 mm wide and 10 mm deep over 12 mm dia expanded closed-cell Polyethylene foam back-up/backer rod of minimum density 22 Kg/Cum, as per manufacturer’s specifications and sketch at Appendix-‘A’. (v) Making profile as per DGCA CAR, panel drawing showing dummy, construction, expansion joints location. Note: (i) Areas inaccessible to paving equipment shall be constructed by manual/hand guided method. Areas in which manual/hand guided methods of construction become indispensable shall be got approved by the Engineer-in-Charge in writing in advance. (ii) The quantity of cement, type of cement and super plasticizer for one Cum. of finished concrete specified are for tendering purpose only. The contractor shall quote his rates assuming quantity of OPC cement as 360 Kg/Cum or 400 Kg of Portland Pozzolana Cement/ Portland Slag cement. In addition, if the actual quantity of cement & super plasticizer required as per laboratory mix design varies from the quantity assumed above, necessary cost adjustment for deviation in the quantity of cement and super plasticizer as per mix design, if any, shall be done as per the rate of cement and super plasticizer in actual supply voucher from manufacturer/authorized dealer at the time of execution. In the case of authorized distributor, the rate may be authenticated by the manufacturer. The rate of cement and super plasticizer exclusive of GST shall only be considered for payment.

Painting runway/taxi track/apron marking with adequate nos of coats to give uniform finish with road marking paint of superior make as approved by the Engineer-in-charge, i/c cleaning the surface of all dirt, scales, oil, grease and other foreign material etc. and lining out complete. a) New work (Two or more coats)

Carrying out Plate Load test to determine Modulus of Subgrade reaction (K - value) at subgrade/ subbase / base layer or at locations decided by the Engineer-In-Charge as per IS Code 9214-1979 and submission of test results as per direction of Engineer -in- Charge. The test should be carried out by the specialised agency / firm as approved by the Engineer -In Charge.

Providing and laying non-pressure NP4 class (Heavy duty) R.C.C. pipes with collar/ spigot jointed with stiff mixture of cement mortar in the proportion of 1:2 (1 cement : 2 fine sand) including testing of joints etc. complete : a) 450 mm dia pipe.

Demolishing cement concrete manually/ by mechanical means including disposal of material within 50 metres lead as per direction of Engineer - in - charge. Nominal concrete 1:3:6 or richer mix (i/c equivalent design mix)

Dismantling of flexible pavement (bituminous courses) by mechanical means and disposal of dismantled material up to a lead of 1 kilometre, as per direction of Engineer-in-charge.

Dismantling manually/ by mechanical means including stacking of serviceable material and disposal of unserviceable material within 50 metres lead as per direction of Engineer-in-charge : Water bound macadam road.

Disposal of building rubbish / malba / similar unserviceable, dismantled or waste materials by mechanical means, including loading, transporting, unloading to approved municipal dumping ground or as approved by Engineer-in-charge, beyond 50 m initial lead, for all leads including all lifts involved.

Supplying and fixing C.I. cover without frame for manholes : 560 mm diameter C.I. cover (heavy duty) the weight of the cover to be not less than 108 kg.

Providing suitable Passenger vehicle (not more than two years old) for cylinder capacity of minimum 1400 CC, either petrol or diesel driven including driver during the progress of work. The Engineer-in-Charge will be controlling officer for movement of vehicles. The cost shall be inclusive of hire and running charges of vehicle including fuel, mobile oil, driver and maintenance of vehicle. Log book shall be maintained at the office of Engineer-in-charge. The vehicle provided shall have commercial license. The monthly hiring charges shall be based on vehicle movement limit of 1800 Kms per month and 10 hours per day. Payment shall be made on pro rata basis depending on actual mileage logged on monthly basis through RA bills.

Preparation and submission of Structural drawings alongwith design calculation for the RCC box culvert within basic strip of operational area and RCC drain with RCC slab, based on soil test report, soil investigation and testing to be carried out as per BIS provisions. The design calculation and drawings with 03 sets of hard copies alongwith the soft copy duly vetted /approved from any Govt. Engineering College/ NIT/IITs shall be submitted, all complete as per direction and satisfaction of Engineer-in-Charge.

Supply of rectangular Mild Steel Isolating Transformer housing box of Size 600mm (l)x 350mm(w) X450mm(h), having two compartments separated by 6 mm thick MS sheet with 25 mm hole. All sides of housing shall be made out of 6 mm thick MS sheet all around including bottom & top surface. The housing shall have 4 nos. holes(2 nos in each compartment) to receive 50mm dia pipe at 50mm above the bottom of opposite two side surfaces(600X 450mm) and one no. hole at one side (350X 450mm) to receive 50 mm dia pipe. The box shall have SS earth bolt of size M10 x 40 mm tapped inside on both side surfaces (350X 450mm) and having two drain holes at the bottom suitably tapped to receive 2 nos 15 mm dia, 'B' class GI pipe. The MS top cover of size 600 mm X 350 mm with suitable rubber gasket and 8 Nos. M10 SS bolts with tapped hole including painting with 1 coat of primer and 2 coats of black enamel paint etc. as required as per the enclosed indicative drawing, however the prior approval of drawing by EIC shall be taken before supply. The housing box shall have detachable stand of size 250mm (l)x 125mm(w) X100mm(h), made of 6 mm MS rod & legs made of 8 mm MS rod, suitable for keeping the isolating Transformers on the top surface of this stand as required.

Supply of rectangular Mild Steel Isolating Transformer housing box of Size 350mm (l)x 350mm(w) X450mm(h), all sides made out of 6 mm thick MS sheet all around including bottom & top surface, having 2 nos. equidistant holes to receive 50mm dia pipe, 50mm above the bottom of opposite two side surfaces (350X 450mm). The box shall have one SS earth bolt of size M10 x 40 mm tapped inside and having one drain hole at the bottom suitably tapped to receive 1 no 15 mm dia, 'B' class GI pipe. The housing shall be suitable to recieve light fitting base plate on the top and having a clear opening of 220 mm dia at the top surface and 6 numbers M 10 tapped hole centred at 260 mm dia. The MS housing shall be supplied with 6 mm thick MS dummy round plate of 330 mm dia with 6 nos M10 SS bolts with tapped hole, including painting of entire housing and cover with 1 coat of primer and 2 coats of black enamel paint etc. as required as per the enclosed indicative drawing, however the prior approval of drawing by EIC shall be taken before supply.

Installation of rectangular MS Transformer housing box of Size 600mm x 350mm X 450mm height i/c cutting/ excavation of surface in hard surface/ PQC/earth, providing two nos. 250 mm long 15 mm dia 'B' class GI pipe in the bottom surface for drainage of water etc., cutting & threading of pipe i/c leveling of housing box with suitable instrument etc. and installation of housing box in soil providing base cement concrete of 1:3:6 of size 900 x 650 x 150 mm thick, and PCC of 1:2:4 all around the housing box of width not less than 125 mm and making suitable slope to the level of runway/ taxiway all around the housing box, painting, lettering, numbring etc i/c disposal of excavated earth, debris/malba and making good the same as original complete as required.

Installation of rectangular MS Transformer housing box of Size 350mm x 350mm X 450mm height inside i/c cutting/ excavation of surface/earth, providing two nos. 250 mm long 15 mm dia 'B' class GI pipe in the bottom surface for drainage of water etc., cutting & threading of pipe,i/c leveling of housing box with suitable instrument etc,, painting of box with one coat of primer and two coats of black enamel paint and installation of housing box in soil providing base cement concrete of 1:3:6 of size 350 x 350 x 150 mm thick, and PCC of 1:2:4 all around the housing box of width not less than 125 mm and making suitable slop to the level of runway all around the housing box, painting, lettering, numbring etc i/c disposal of excavated earth, debris/malba and making good the same as original complete as required.

Supply and laying of 50 mm dia (OD), ISI marked HDPE pipe as per IS:4984:2016, of rating PE 100, PN 10, to connect the consecutive transformer housing boxes at a suitable depth i/c providing the socket / lock / checknut / any other suitable accessories at both sides of transformer housing box to fix the pipe. The laying shall be in hard surface / PQC / soft soil i/c getting out the excavated materials up to 450 mm depth, refilling the same and consolidating the layers by ramming and watering etc., making good the same and disposal of un-usable materials etc. i/c supply and laying of suitable size nylon rope in the complete length of HDPE pipe, suitable for drawing the cable and wire in the pipe at a later stage etc. complete as required, as per the direction of Engineer-in-Charge.

Taking GPS based co-ordinates on complete length of PTT, Taxiway & Link Taxi by using total station and identifying the locations of light fixtures, route of cable etc based on GPS co- ordinates and marking the same at physical site and on drawings, preparation and submission of reports / drawings as required and as per directions of the Engineer In charge.

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