EXPANSION OF BARAPANI (SHILLONG) AIRPORT INCLUDING RUNWAY EXTENSION, EXPANSION OF TERMINAL BUILDING AND APRON AND OTHER ALLIED WORKS. SH AIRSIDE WORKS (PHASE-I) RE-CALL

Amount

Excavation of soil using hydraulic excavator of 0.90cum bucket capacity including cutting and loading in tippers, trimming bottom and side slopes, in accordance with requirements of lines, grades and cross sections, and disposed of the excavated earth, transporting to the embankment location including loading and unloading with all lifts and leads within airport premises excluding the survey work as per direction of Engineer-In-Charge (ref. MORTH Specification section-306)

Construction of embankment with available excavated earth deposited at site from other locations with spreading, neatly leveling/ grading and compacting layer by layer to achieve the desired levels and compactions to meet the requirement of table 300-2 of MORTH specification etc. complete in all respects excluding the survey work as per direction of Engineer-In-Charge.(ref. MORTH Specification section-305)

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, lead up to 50 m and lift upto 1.5 m.

Carriage of Earth by Mechanical Transport excluding loading, unloading and stacking upto 5Km Lead.

Providing and laying in position cement concrete of specified grade excluding the cost of centering and shuttering - All work up to plinth level : (a) 1:2:4 (1 cement : 2 coarse sand (zone-III) : 4 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 : (c) 1:4:8 (1 Cement : 4 coarse sand (zone-III) derived from natural sources : 8 graded stone aggregate 40 mm nominal size derived from natural sources)

Providing and laying in position cement concrete of specified grade excluding the cost of centering and shuttering - All work up to plinth level : (d)1:5:10 (1 cement : 5 coarse sand (zone-III) derived from natural sources : 10 graded stone aggregate 40 mm nominal size derived from natural sources)

Random rubble masonry with hard stone in foundation and plinth including levelling up with cement concrete 1:6:12 (1 cement : 6 coarse sand : 12 graded stone aggregate 20 mm nominal size) upto plinth level with : Cement mortar 1:6 (1 cement : 6 coarse sand)

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

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

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

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

Steel reinforcement for R.C.C. work including straightening, cutting, bending, placing in position and binding all complete upto plinth level. 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 I Ordinary Portland /Portland Slag cement, admixtures in recommended proportions as per IS: 9103 to accelerate I 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 levelConcrete of M35 grade with minimum cement content of 370 kg /cum

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

Demolishing brick work 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.

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

Demolishing cement concrete manually/ by mechanical means including disposal of material within 50 metres lead as per direction of Engineer - in - charge. A) Nominal concrete 1:4:8 or leaner mix (including equivalent design mix)

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 filling with coarse sand, including watering, ramming, consolidating and dressing complete.

Providing and laying design mix cement concrete of M-30 grade, in roads/ taxi tracks/ runways, using cement content as per design mix, using coarse sand and graded stone aggregate of 40 mm nominal size in appropriate proportions as per approved & specified design criteria, providing dowel bars with sleeve/ tie bars wherever required, laying at site, spreading and compacting mechanically by using needle and surface vibrators, levelling to required slope/ camber, finishing with required texture, including steel form work with sturdy M.S. channel sections, curing, making provision for contraction/ expansion, construction & longitudinal joints (10 mm wide x 50 mm deep) by groove cutting machine, providing and filling joints with approved joint filler and sealants, complete all as per direction of Engineer-in-charge (Item of joint fillers, sealants, dowel bars with sleeve/ tie bars to be paid separately). Note:- Cement content considered in M-30 is @ 340 kg/cum. Excess/ less cement used as per design mix is payable/ recoverable separately. Cement concrete manufactured in automatic batching plant (RMC plant) including transportation to site in transit mixer

Construction 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 tippers to work site, for all leads & lifts, spreading in uniform layers of specified thickness with motor grader on prepared surface and compacting with vibratory power roller to achieve the desired density, complete as per specifications and directions of Engineer-in-Charge. (a) With material conforming to Grade-III (size range 26.5 mm to 0.075 mm ) having CBR Value-20

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 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.

Construction of dry lean cement concrete sub base over a prepared subgrade with coarse and fine aggregate conforming to IS:383, the size of coarse aggregate not exceeding 25 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, for all leads & lifts, laid with a mechanical paver, compacting with 8-10 tonne vibratory roller, finishing and curing etc. complete as per direction of Engineer-in- charge.

Providing and laying Non Pressure NP-4 class (Heavy duty) R.C.C. pipes including collars/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)1200 mm dia RCC pipes. (Laying by manual/ mechanical means)

Providing and applying primer coat with bitumen emulsion SS1 grade conforming to IS:8887 on prepared surface of Granular Base including clearing of surface and spraying primer at the rate of 0.70 kg/sqm using mechanical means complete in all respects as per direction of Engineer-In-Charge. The contractor shall quote his rates assuming quantity of bitumen emulsion as 0.70 Kg/Sqm. If the actual quantity of bitumen emulsion varies from the quantity assumed above, necessary cost adjustment for deviation in the quantity of bitumen emulsion shall be done as per rate in actual supply voucher from nearest refinery at the time of execution. The rate of bitumen emulsion exclusive of GST shall only be considered for payment.

Providing and applying tack coat using bitumen emulsion (Rapid setting) complying with IS:8887, spraying the bitumen with mechanically operated spray unit at the rate specified below, cleaning and preparing the existing pavement surface as per specifications complete in all respects as per direction of Engineer-In-Charge. If the actual quantity of bitumen varies from the quantity specified, necessary cost adjustment for deviation in the quantity of bitumen shall be done as per rate in actual supply voucher from nearest refinery at the time of execution. The rate of bitumen exclusive of GST shall only be considered for payment. (a) 0.20 Kg/Sqm on existing bituminous surface

Providing and applying tack coat using bitumen emulsion (Rapid setting) complying with IS:8887, spraying the bitumen with mechanically operated spray unit at the rate specified below, cleaning and preparing the existing pavement surface as per specifications complete in all respects as per direction of Engineer-In-Charge. If the actual quantity of bitumen varies from the quantity specified, necessary cost adjustment for deviation in the quantity of bitumen shall be done as per rate in actual supply voucher from nearest refinery at the time of execution. The rate of bitumen exclusive of GST shall only be considered for payment. (a) 0.30 Kg/Sqm on existing concrete surface

Providing, laying and fixing of self-adhesive glass fibre reinforcement grid of high modulus of approved make having mesh size not exceeding 12.5mm x 12.5mm. The self-glass fibre reinforcement after laying over the pavement shall be pressed down fully with a rubber tyred roller and glued to pavement surface. The grid being self-adhesive does not require tack coat. The longitudinal overlap should not be less than 250mm and transverse overlap i.e., at the end of the roll should not be less than 150mm. The items should be completed as per manufacturers specification and satisfaction of Engineer-in-charge.

Providing and laying of Hot Mix Dense Bituminous Macadam (DBM) using crushed stone aggregate of quality, size and grading as specified and Cement filler as specified and Viscosity Grade Bitumen (supplied in bulk) in proportions as per job mix formula and laid to specified levels, grade and camber as per specification, drawings and as directed by the Engineer-in- Charge including compacting with 8-10 tonne, preferably vibratory road roller of adequate capacity to achieve the specified values of compaction, strength, surface accuracy complete [for tendering purpose VG bitumen of grade VG-30 shall be taken as 110 kg/m3 of mix supplied in bulk produced by Govt. Refineries and 2% Cement by weight of aggregates as filler material.

Providing and laying of Hot Mix Semi Dense Asphaltic Concrete (SDAC) using crushed stone aggregate of quality, size and grading as specified and Cement filler as specified and Viscosity Grade Bitumen (supplied in bulk) in proportions as per job mix formula and laid to specified levels, grade and camber as per specification, drawings and as directed by the Engineer-in- Charge including compacting with 8-10 tonne, preferably vibratory road roller of adequate capacity to achieve the specified values of compaction, strength, surface accuracy complete [for tendering purpose VG bitumen of grade VG-30 content shall be taken as 120 kg/m3 of mix supplied in bulk produced by Govt. Refineries and 2% Cement by weight of aggregates as filler material.

Providing and laying of Hot Mix Dense Asphaltic Concrete (DAC) using crushed stone aggregate of quality, size and grading as specified and Cement filler as specified and Viscosity Grade Bitumen (supplied in bulk) in proportions as per job mix formula and laid to specified levels, grade and camber as per specification, drawings and as directed by the Engineer-in- Charge including compacting with 8-10 tonne, preferably vibratory road roller of adequate capacity to achieve the specified values of compaction, strength, surface accuracy complete [for tendering purpose VG bitumen of grade VG-30 content shall be taken as 135 kg/m3 of mix supplied in bulk produced by Govt. Refineries and 2% Cement by weight of aggregates as filler material

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.

Carrying out Topographical and contour surveying, traversing , contouring & coordinating all permanent and semi-permanent feature by Total station survey instrument and Auto Level as required including mobilization and demobilization of the survey team after completion of survey work at Airport premises of operational area and newly acquired in different plots as per direction of the Engineer in-charge. The following steps shall be taken up: i) Carrying out site survey and taking reduced level 3m x 3m grid.ii) Submission of sets of contour map in suitable scale and size with marking import ants (3 (three) nos. coloured hard copies & 1(one)soft copy.iii) Submission of level sheet in Excel format (Hard copy & soft copy) with quantity calculation for cutting & filling earth as per the gradient which shall be decided by the Engineer in charge as per DGCA-CAR (Civil Aviation Requirement)iv) Submission of Invert Level of Storm water drain to be constructed and as per direction of Engineer-in-chargev) The requisite all survey works for execution of earthwork, quantity work out for Running/Final Bill shall also be included in the scope of survey work.

Painting runway/taxi track/apron marking including lettering 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 ail dirt, scales, oil, grease and other foreign material etc. and lining out complete. (a)Two or more coats

Painting runway/taxi track/apron marking including lettering 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 ail dirt, scales, oil, grease and other foreign material etc. and lining out complete. (a)One or more coats

Supply of CI transformer housing box, round shape of outside dia 330mm, Height 450mm, made of 10mm thick all round except on Top surface which is 15 mm thick having a clear opening of 220mm at the top surface and 6 Nos. M10 tapped Holes at the hole centre of 260mm to receive light fittings base plate and bolts. The box shall have a clear hole at one side surface, centre at 75mm above bottom surface and suitable to receive 50mm dia B Class GI pipe and check nuts. The box shall have two earth bolts of M 10 x 30mm tapped inside near the hole (100 mm away from the hole centre) and a drain hole at the bottom suitably tapped to receive 15mm dia, B class GI Pipe as per Technical Specifications as required (Single hole).

Supply of CI transformer Housing Box, Round Shape of outside dia 330mm, Height 450mm, made of 10mm thick all round except on top Surface which is 15mm thick having a clear opening of 220mm at the Top Surface and 6 Nos. M10 tapped Holes at the hole centre of 260mm to receive light fittings base plate and bolts. The box shall have a clear hole at one side surface, centre at 75mm above bottom surface and suitable to receive 50 mm dia B class GI pipe and check nuts and also have a clear hole on the opposite side, centre at 75 mm above between to hole centre & suitable to receive 50 mm dia B Class GI Pipes and check nuts. The box shall have two earth bolts of M 10 x 30 mm inside near the hole (100 mm above bottom surface) and a drain hole at the bottom suitably tapped to receive 15mm dia., B Class GI Pipe as per Technical Specifications as required (Double hole) for Threshold/END light.

Supply of C.I. Collar suitable for mounting installing on the existing transformer housing box, made out of water tight round type metal container of outside size 330 mm diameter and upto 250mm height , 10 mm thick all round except on the top surface which is 15 mm thick and a clear opening of 220 mm diameter at the top as well as bottom having 6 Nos. x M-10 taped hole along the circumferential centre of 260 mm diameter top/bottom plate to receive bolts as required as per the drawing & specifications. total 12nos of SS bolts shall be provided to fix the coller and light fixture. The housing box should be complete with neoprine rubber gasket for the top covers, painting with Anti-corrosive primers and paint inside and outside etc. as per drawing and specification complete as required.

Installation of transformer housing boxes (Item No. 37 & 38) with a base concrete of 1:3:6 of size 800 mm X 600 mm with 100mm thick at bottom and all around concrete of 1:2:4, 150 mm thick, top sloped with 1:2:4 cement concrete including fixing 1 or 2 nos. of GI Pipes of size 50mm dia, providing and fixing of 15mm diameter and 300mm length B class GI pipe with check nuts for drainage of water, smoothening the top surface with cement, including excavation of hard surface/ bituminous concrete at the runway shoulder etc. complete as required.

Installation of CI Collar (Item No. 39 ) on the top of the existing CI transformer housing box with all around concrete of 1 : 2 : 4, 150 mm thick, top sloped with 1:2:4 cement concrete, smoothening the top surface with cement, including fixing of SS nut bolts, including cleaning of any bituminous concrete on the housing box etc. complete as required.

Supply & Laying of 50mm NB 'B' Class GI Pipe at a depth of 0.3m in earth by excavation for connecting Transformer housing boxes i/c threading, cutting, jointing of pipe and providing check nuts at both ends/one end, refilling etc. as required and as per the instruction of Engineer-in-charge.

ATCON INDIA LTD. (BID ID -915093)

Anusha Projects Priavte limited (BID ID -915082)

NSC Projects Pvt. Ltd. (BID ID -915599)

RANJIT BUILDCON LIMITED (BID ID -914265)