Extension of Runway 08-26 at Tirupati Airport, Sub Head-Balance Airfield Ground Lighting Works

Amount

Laying of 50 mm dia GI Pipe i/c providing the socket in soft soil upto depth of 1.5 mtr i/c getting out the excavated the materials, returning the soil as required in layers not exceeding 20 cm in depth including consolidating each deposit layer by ramming watering etc. & disposal of unservicable material etc. as required as per the direction of engineer in charge.

Supply of CI Transformer Housing Box, Round Shape of outside dia 330mm Height 450 mm 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 6Nos. M10 Tapped Holes at the hole centre of 220mm to receive light fittings base plate and bolts. The box shall have two clear hole onside surface. Centre at 75mm above bottom suitable to receive 50mm dia B class GI/HDFE pipe and check nuts and also have a clear hole side. Centre at 175mm above bottom suitable to receive 15mm 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 (100mm above bottom surface) and a drain hole at the bottom suitably tapped to receive 1/2" dia., B Class GI Pipe as required - Double entry.

Installation, testing and commissioning of 04 nos (1 set) PAPI Light unit on unpaved surface with cement concrete base as per manufacturers recommendations including excavation of earth and its disposal, grouting of light unit base legs, installation of PAPI system, leveling, alignment of light beams, moulding of secondary leads, connections etc. and calibration check points for maintenance (as per manufacturers recommendations) complete as required.

Supply, installation testing and commissioning of internally illuminated LED based Mandatory / Information /Location/VOR check point Runway / Taxiway guidance signage of various sizes made out of 4mm thick glare free poly carbonate sheet at front and body made out of 2.0mm thick powder coated aluminum profile having minimum width of 150mm and supported at back by 50mm dia (Nominal size) die cast aluminum / GI pipe at a separation as required, and frangible coupling as required. Light source shall be high luminous, long life typical 50,000 Hrs type, 0.5 Watts LED's assembled on alluminum PCB of size 700mm X 20mm and having 11 LED’s per PCB for boards having height 800mm & 500mm X 20mm PCB having 8 LED’s per PCB for board having height 600mm respectively. The thickness of the alluminum PCB should be 2mm in order to ensure proper heat dissipation. These alluminum PCB’s should be placed not more than 160mm apart across the length of the board in order to ensure uniform distribution of light across the board. Each board having length from 800mm up to 3000mm should be illuminated by a single converter & by using single isolating transformer of suitable wattage in order to save the capital cost of multiple isolating transformers. Signage shall be suitable for operation on series circuit at variable current from 2.8Amp - 6.6Amp and will give constant brightness for all current variation. All the signage shall have letters and symbols made by computerized cutting of vinyl and pasting on the polycarbonate sheet from inside/outside of the sign face of required color as per ICAO specifications.

Installation of transformer housing box with a base concrete of 1:3:6 of size 630 x 630 x 100mm thick all round concrete of 1:2:4 150mm thick. The top sloped with 1:2:4 cement concrete including providing and fixing 10" long 1/2" dia "B" class GI pipe with checknuts for drainage of water including excavation of side shoulder and re-filling (wherever the transformer are in a line the same has to be aligned in such a way that the centers fall in a straight line) etc. complete as required.

Installation, Testing and Commissioning of HIRL/MIRL fixtures on the existing transformer housing box, including installation of isolating transformer, lamp, providing and fixing of 6 Nos. Stainless steel M-10 bolts, spring and plain washers including providing and fixing of rubber gasket and other accessories, making alignment, making transformer connections and earth connections etc. as required.

Installation, testing and commissioning of Simple Approach fittings on the existing transformer housing box including installation of frangible tubular pole of various heights, isolating transformer and other accessories, alignment, levelling, making transformer connection, earth connection etc. as required.

Providing and Fixing of top cover plate made with 5mm thick MS Sheet suitable for existing 330mm dia CI transformer housing box with 6 Nos. Stainless steel M-10 bolts, spring and plain washers including providing and fixing of rubber gasket, painting etc. complete as required.

Laying and fixing of one number PVC insulated and PVC sheathed / XLPE power cable of grade exceeding 1.1 KV but not exceeding 11 KV of size upto 35 Sq.mm in the existing RCC/HUME/METAL/HDPE pipe as required.

Making field connections by crimping 16 Sq.mm plug and receptacle with the existing 16 Sq.mm Single core copper conductor, PVC insulated, PVC sheathed cable including filling with gap with water sealant material, applying PVC insulation tape over HT tape insulation etc. as required.

Making field connections by crimping 6 Sq.mm plug and receptacle with the existing 6 Sq.mm Single core copper conductor, PVC insulated, PVC sheathed cable including filling with gap with water sealant material, applying PVC insulation tape over HT tape insulation etc. as required.

Providing and Laying of 25 mm 'B' class GI Pipe including excavation of hard / soft soil complete with threading and alignment of pipe with transformer housing box and bottom assembly of inset light fitting, providing checknuts including coupling etc. as required.

Earthing with G.I. earth pipe 4.5 metre long, 40 mm dia including accessories, and providing masonry enclosure with cover plate having locking arrangement and watering pipe etc. with charcoal/coke and salt as required.

Providing and laying earth connection from earth electrode with 6 SWG dia G.I. Wire in 15 mm dia G.I. pipe from earth electrode including connection with G.I. thimble excavation and re-filling as required.

Providing and fixing 6 SWG dia G.I. wire on surface or in recess for loop earthing as required.

Providing, laying and fixing of 40 mm Dia, PE-63, 4 Kgf. HDPE pipe in ground complete with necessary pipe couplings including trenching (80 cm deep) and re-filling etc. as required.

Laying and fixingof 40 mm Dia, PE-63, 4 Kgf. HDPE pipe, in ground complete with necessary pipe couplings including trenching (80 cm deep) and re-filling etc. as required.

Excavation of the cable trenches in hard rock not exceeding 1.5 metres in width, and lift upto 1.5 metres, including getting out the excavated soil and disposal of excavated soil as directed within a lead of 50 metres.

Earth work in excavation by mechanical means (Hydraulic excavator)/ manual means over areas (exceeding 30 cm in depth, 1.5 m in width as well as 10 sqm on plan) including getting out and disposal of excavated earth lead upto 50 m and lift upto 1.5 m, as directed by Engineer-incharge.

All kinds of soil

Dismantling, trans-installation, testing and commissioning of existing frangible & illuminated type wind direction indicator including Providing and laying suitable cement concrete foundation, with supply and fixing of M24 Foundation bolts and nuts for installation of 5 Mtr height FRP frangible WDI as per OEM recommendations and making necessary power connections and complete as required.

Supply and installation of cable junction box of (Make: Hensel Catalog No. DK 5054G) IP 65 with metric knockouts and with terminals for cable entry, supply and fixing of 2 pole 20A MCB, C-series in the existing box including Supply and making end termination of 2Cx16Sq.mm cables (In and Out), supply and suitable size FRP Channel for mounting Cable junction box and grouting in the ground etc., complete as required.

C P MONCHESTER ELECTRICALS