Wall to Wall Grading of Operational area at Trichy Airport. SH -Electrical Works (SITC of CI and MS Housing boxes and rising of Manhole chambers for Airfield lighting systems)

Amount

Fabrication & supply of MS Transformer Housing Box of size 750mm x 350 mm x 450 mm ( H) made out 6 mm thick MS sheet and top cover 10 mm thick MS sheet with three compartment as per drawing and all tapped holes should be suitable for M-10 size bolt and bolt shall be SS including painting the box with one coat of primer & two coats of black enamel paint etc. as required .

Supply of C.I. Isolating Transformer housing box,water tight round type,metal container of outside size 330mm height 450mm made of 10mm thick cast iron moulding suitable to receive a light fitting base plate on the top and underground housing associated with transformer power cable and having a clear hole centre at one side surface centre 75mm above bottom surface suitable to receive one No. / two of 50mm dia "B" class GI pipe and including check nuts as required and another hole at 175mm from the bottom of the CI Box to receive one no. 15mm dia "B" class GI pipe and check nut as required.The box should have two SS earth bolts of M10 x 30mm tapped inside near the hole (4" away from the hole centre) and having a drain hole at the bottom suitably tapped to receive 15mm dia "B" class GI pipe and having clear opening of 220 mm at the top surface and 6 nos. M10 tapped hole at the hole centre 260 mm to receive fitting base plate and bolts as required as per the drawings.

Installation of MS Transformer Housing Box of size 750mm x 350 mm x 450 mm ( H) with base concrete of 1:3:6 of size 1050 x 650 x 100 mm thick, Cement concrete of 1:2:4, 150 mm thick top slopped all around the box including necessary excavtion, painting, lettering, numbering etc. as required .

Installation of round type transformer housing box with base concrete of 1:3:6 of size 630 x 630 x 100 mm thick all around concrete of 1:2:4, 150 mm thick top slopped with 1:2:4 cement concrete including providing and fixing 10" long 1/2" dia B class GI pipe with check nuts for drainage of water including excavation and refilling, aligning the boxes in straight line etc complete as required.

Providing brick work with common burnt clay F.P.S. (non modular) bricks of class designation 7.5 in foundation and plinth in Cement mortar 1:4 (1 cement : 4 coarse sand) and inside plastering with cement mortar 1:3 (1cement : 3 coarse sand) 12mm thick, finished with a floating coat of neat cement complete as required.

Providing RCC top slab 1:2:4 mix (1 cement : 2 coarse sand : 4graded stone aggregate 20 mm nominal size) with thickness as instructed by E-I-C on existing manholes.

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)