Construction Of Civil Structure for 18 Metre Antenna at the GMRT, Khodad

Excavation in all type of Soil & murum from 0.0 to 1.5m depth

Excavation in all type of soil and murum for Hume Pipes upto 1.5 m depth

Excavation in all type of Soil & murum from 1.5m to 3.00m depth

Excavation in hard rock from 1.5m to 3.00 m depth

Excavation in hard rock from 3.00 m to 4.50 m depth

PCC M-15 Grade in sub base flooring, foundation in pedestals, rafts, cable pits, cable trenches, central pit, plinth protection, hume pipes,encasing etc.

All works up to plinth level. Concrete of M40 grade with minimum cement content of 390 kg/cum

All works above plinth level up to Floor V level . Concrete of M40 grade with minimum cement content of 390 kg/cum

For vertical surface two coats @ 0.70 kg per sqm per coat.

For horizontal surface one coat @1.10 kg per sqm.

Making plinth protection 50 mm thick of cement concrete 1:2:4 (1 cement : 2 coarse sand (zone-Ill) derived from natural sources : 4 graded stone aggregate 20 mm nominal size derived from natural sources) over existing PCC surface, including necessary levelling,dressing & finishing the top smooth and curing.. All complete as directed by Engineer-in-charge.

Fixing Laser cut 32mm dia 8.8 grade threaded foundation/ anchor bolts & Base plate as per drawing and instruction of Engineer Incharge, including washer, double nuts with tightening by hydraulic or Electric torque wrinch up to specfic torque as specified by manufacturer, including fixing in position with laser cut and all sides machine finish truely level surface templates with CNC drilled bolt-holes with tolerance +/- 10 Micron. Tolerance in level and in centere to centre distance between bolts in any direction shall not exceed +/-0.2mm. Check the assembly of Templates and bolts at shop prior fixing.The Bolts shall be fixed with the help of Laser Tracker ( AT 960 / AT 930 ) and Total Station where ever required. The tolerance limit +/- 0.2mm is applicable before casting and after casting concrete. Bolts shall be fixed at 5.5m Height.) including steel 'H' Frame scaffolding etc. All the required materials (Foundation bolts, nuts, bolts, base plates etc.), will be supplied by GMRT-NCRA, all complete as directed by Engineer-In-Charge. (Note:- Only Foundation bolt including nuts & washers weight will be considered for the payment)

Providing & fixing seamless ceiling with gypboard of 12.5mm thick.fixed to the underside of the suspended grid formed of GI perimeter channel of size 20x27x30mm (MF 6A) fixed along the wall by wooden screws and metal expansion rawl plugs. The GI intermediate channel of size 45x15x0.90 mm (MF7) shall be fixed to the suspended strap hanger /GI ceiling angle at intervals not more than 1220mm. The suspended GI ceiling angle / strap hanger is to be connected with GI soffit cleat of size 37x27x25x1.6mm and it should be fixed on the roof slab/beam by using metal expansion fasteners (Wt.Type) of 12.5mm dia to a length of 35mm with 6mm dia.bolt / screw at top ends .The GI ceiling section of size 80x26x0.5mm (MF5) is to be provided across the intermediate channel at intervals not more than 600mm centers at bottom and the same shall be fixed by GI connection clips 2.64mm dia at the intersection points. The ends of ceiling section (MF5) channel by adopting an overlap length of minimum 150mm connected with intermediate channel shall be fixed to perimeter channel in insertion.all complete as directed by Engineer-In-Charge. Make : Gyproc,Gypboard or approved equivalent. (Note:- This item shall be executed based on the site condtions and requirement of GMRT-NCRA)

Providing and fixing spigot end NP3 class Hume pipes with required line and slope and sealing the joints with C.M.1:1, excluding excavation, back filling and PCC. including loading ,unloading, transportation, etc. all complete as directed by Engineer-In-Charge.

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