Public Works Department Tender

31.22 Earthing

31.22(i) Earthing with GI earth pipe 4.5 m long and 40 mm dia with masonry enclosure on the top etc. as required .

31.22(ii) Extra for using salt and charcoal / coke for pipe earth electrode as required.

31.22(xii) Pdg. and laying earth connections from earth electrode with 4.00 mm dia G.I. wire in 15 mm dia G.I. pipe from earth electrode as required .

31.26 Supply and erection of under ground cable ,loose in existing pipe or trenches complete with necessary connections .

31.26 (xxviii) Ard. 70 Sq. mm 3.5 Core Cable .

31.26 (xIi) Ard. 25 Sq. mm 4 Core Cable .

31.40 Supply and erection of PVC unsheathed copper conductor cable single core 1100 volts grade in pipe of suitable size excluding cost and erection of pipe.

31.40 (i) Size 1.5 sqmm ( 3/0.81 )

31.66 Supply and Fixing of rotary handle for ON / OFF operation of existing MCCB in the LT panel including fixing the same in position with all labour and material to required to complete the job in all respect.

(i) Rotary Handle up to 125 Amp., MCCB

(ii) Rotary Handle above 125 Amp., MCCB

31.67 Supply and erection of mark double walled corrugated (DWC) HDPE pipe laid 1Mtr. Below ground level including diging and refilling of earth including cost of sutiable size socket/cuppler for HDPE pipe including the cost of labour and material required to complete the job in all respect upto the entire satisfaction of Engineer-in-Charge of the work.

(i)HDPE pipe 63/50 mm outer dia/inner dia.

(ii) HDPE pipe 90/75 mm outer dia/inner dia.

M.R. items N.S - 1 Stadium Mast – 30mtr Height 1 Structure S/I/T/C of 30 M hot dip galvanized high mast and the mast continuously tapered polygonal cross section [at least 20 sided]. The Mast structure should be pleasant in appearance & designed for suitable wind loads considering basic wind speed as per IS 875, part-III, 1987 including the cost of foundation, nuts & bolts, control panel aviation light etc. complete in all respect. 2 Construction The mast sections shall be manufactured from M.S. sheets conforming to BSEN 10025, S355 J0 or equivalent, cut and folded to form a continuously tapered polygonal section. The welding shall comply IS 9595. Masts shall be delivered in three sections of approximately 10.7 m which shall be assembled at site by slip-stress-fit method. The minimum overlap distance shall be 1.5 times the diameter at penetration. There will be no circumferential welding in any section. No site welding or bolted joints in the mast sections will be allowed. The Base plate without any laminations shall be welded to the bottom section of the mast. The welded joints will be fully penetrated and developed to the strengths of the respective sections.The Base plate shall be provided with supplementary gussets between the bolt holes to ensure elimination of helical stress development. Mast base section will have a lockable door of size 1200mm X 300mm for easy access to winch and power tool operations. Bottom of door shall be 500mm above the top of the base plate. All sections shall be hot dip galvanized as per IS:4759. The galvanization shall be done by single dip method for better aesthetic appearance. The mast shall have a top OAF of 250 mm and bottom OAF OF 800 mm. Thickness of bottom section shall be of 6 mm, Middle section shall be 5 mm and top section shall be of 5 mm. Base plate shall be 1000 mm and 40 mm thick.

Each mast shall he 20 nos. of M30x1210 mm foundation bolts which shall be cast in concrete using a template. The bolts shall have an anchor plate of 8 mm thickness for good anchorage 3. Wind Loading The Mast sections should be designed based on basic wind speed data as mentioned at 10m level as per IS 875, Part-III, 1987. The structural design of the mast shall comply with ILE TR 7 guidelines. The design life shall be a minimum of 25 years (for K1 factor). The foundation design shall be made by taking into considerations the following :1. Soil conditions2. Loading on the mast as per ILE TR 7 and Basic wind speed as per IS 8753. Static load of the total mast structure. 4. Raising and Lowering Mechanism The high-mast shall have an optimally balanced system for raising and lowering of the Luminaries and control gear boxes for regular maintenance work. The same shall be provided by means of a double drum winch fixed at the base, 3 wire suspension wire rope system ( This system has 2 wire ropes of 8 mm diameter from Winch to compensating Disc and 3 wire ropes of 8 mm diameter from compensating disc to Lantern carriage. 5. AccessoriesHEAD FRAME M.S. fabricated hot dip galvanized housing using IS2062 grade steel accommodating CA pulleys with stainless steel pins for the suspension of wire ropes and the electrical cables. Pulleys are grooved suitably to ensure that the wire ropes/cables do not get dislodged from their positions while raising / lowering. Self-lubricating bearings and stainless steel shaft shall be provided for smooth and maintenance free operation throughout the mast life.The head-frame shall be made in three compartments placed 120 degree apart for most optimum balancing of lantern carriage.

Head frame shall have top canopy to protect the mast from entry of water / solid particles etc from the top. Top canopy shall have provision for fixing lightning arrestor of suitable design. LANTERN CARRIAGE A fabricated MS lantern carriage, which shall be hot dip galvanized shall be provided for mounting of luminaires. The luminaire arms/channels/bars shall be welded or bolted to the carriage as per bidder’s design. The lantern carriage shall be made of steel pipes. The flanges shall be jointed at site by stainless steel bolts and nuts. Inner side of the lantern carriage shall have a PVC guide ring to protect the mast surface while raising and lowering of the lantern carriage. The diameter of the lantern carriage shall be of size suitable to accommodate 17 LED light fittings in four tiers and for this double lantern ring will be required. The lantern ring should be fabricated with pipes/channels on the front and back side to get a flat mounting of the 17 LED luminaires. The length of the bars should be suitable to mount the LED luminaires as per bidder’s design. The Double lantern carriage will have top ring at approximately 29.8 m and the second ring will be at approximately 28.3 m. The spacing of rings can be as per supplier design. SUSPENSION WIRES Three-wire suspension assembly shall be used for suspension of the lantern carriage system. Two wire ropes shall be used for connecting the compensating disc to the winch and three wire ropes shall be used to connect the lantern ring to the compensating disc The stainless steel wire rope as per AISI 316 and shall be having a nominal diameter of 8 mm.Grade. This shall be of 7x19 construction. Breaking load capacity of each wire rope shall not be less than 3500 kg with a factor of safety not less than 5.0.

DOUBLE DRUM WINCH The double drum winch shall be completely self-sustaining type without the need for brake shoe, springs and clutches. The winch shall have selflubrication mechanism by means of an oil bath. The gear ratio shall be 50:1 and safe working load capacity shall not be less than 1500 kg. The winch drums shall be grooved to ensure perfect seat for stable and tidy rope lay with no chances of slipping of ropes. The winch shall be a double gear and double drum winch. The rope termination in the winch shall be such that distortion or twisting is eliminated and at least 5 to 6 turns of rope remain on the drum even when the lantern carriage is at fully lowered position. It should be possible to operate the winch manually by a suitable handle or by an integral power tool. ELECTRICAL HOIST CABLES The electric cable shall be EPR insulated and PCP sheathed as per IS 9968 and should be of size 5 core X 4 sq.mm, the cable shall be highly flexible for optimum design life . There shall be 2 nos. of trailing cables per mast so as to have 2 circuits.The trailing cables shall be provided with suitable 6 pin plug and socket. As there are 2 trailing cables there will 2 sets of plug and socket. For testing luminaires in lowered position receptacle shall be provided in the junction box. POWER TOOL A suitable high powered, electrically driven and electrically controlled, internally mounted power tool with manual over ride shall be provided for the raising and lowering of the lantern carriage. A handle for manual operations shall be provided as per standard practices. Power tool shall consist of 3-phase 415volts, 50 Hz, min. 3 HP motor. The power-tool shall have a torque limitor for protecting the wire rope system from over-loading.

ELECTRICAL DISTRIBUTION BOARD AT THE BASE A suitable PVC/Hylam BOARD shall be provided at the base of the mast at door level. This will have an MCB of suitable rating for the lighting load of the mast. The MCB will terminate the in-coming supply cable and can be used as a local isolator during maintenance work. AVIATION OBSTRUCTION LIGHT Two nos. LED based aviation obstruction light (or twin LED type) shall be provided on the lantern carriage. CONTROL PANEL: Each High mast shall have a weather proof control panel for switching ON and OFF of the luminaires. The control panel is placed at a distance of about 3 m from the mast centre. The control panel shall have provision for operation of the power tool. The control panel should contain an Incomer 4 pole MCB of 63 A rating. The lighting control should be through 2 nos. of 32A contactor, for switching ON and OFF the lights 2 sets of pushbutton sets shall be provided. For power tool operation there should be 2 nos. of 9 A contactors and suitable overload relay. Two nos. of push buttons shall be provided in the panel for the operation of ‘RAISING’ and ‘LOWERING’. Mast shall be as per technical data sheet attached. JUNCTION BOX 2 junction boxes shall be provided on the lantern carriage for connecting the luminaries and the trailing cables.

Note:- The agency will submit the design of mast, lantern including luminaires installation structure, foundation, bolts etc. from manufacturer of the mast before supply of the same with the undertaking from manufacturer that mast is safe for use with 14 nos. LED lights and allied structure / equipment. Make: - Philips / Bajaj / Volmont / Surya

N.S - 2 Supply and erection of LED Flood light Luminaires 500W of Surya make or its equivalent make of Crompton LFPI1-500-CDL/60-M / Bajaj BJFL 500W LED/Jeta Valour FL500W MOD Havells Make with lense with high power LED flood light in aluminium PDC housing, toughened glass cover with IP 66 protection and accessories required to complete the job in all respect including erection and fixing including connection and other petty material for the same upto the entire satisfaction of Engineer in Charge of the work.

N.S - 3 Supply, erection, testing & commissioning of hut type outdoor double door panel, panel board made out of 14 gauge mild steel sheet with 75 mm x 40 mm x 6 mm channel iron base frame painting with light Grey epoxy paint, suitable for operation on 3 Phase 4 wires, 415- V. 50-Hz A.C. supply with overall size of panel 1700 mm x 1650 mm x 450 mm deep. The panel should be fixed 300 mm above C.C.Block & legs are embedded in C.C. Block of size 1900 x 650 x 250 mm above ground level duly plastered with 12 mm thick 1:4 cement plaster having a base of size 1850 x 850 x 250 mm below ground level. The panel shall be complete in all respect upto the entire satisfaction of Engineer-in-charge of work ( but excluding cost of MCCBs including the cost of internal wiring with PVC copper cable, protection fuses and all other material required to complete the job in all respect.