PROVISION OF HIGH MAST LIGHTS AND SIGNAGE BOARD AND MISCELLANEOUS WORK NEAR JETTY AREA AT TIMBER POND CHENNAI UNDER GE(I) (CG) CHENNAI

Fabricating, supplying, instaling, testing and commissioning of casing caping type LED/ Smps, Front Lit letters: Height 1.5f & 1.2mm thick perforated GI strips Navy blue base of size 42'x6' comprising of 2"x1" MS frame with fixing on MS structure with channels, angles base plates and fasteners 2.5 tones and civil work foundation. Horziontal L type angle supports betwwen columns made of channels front and back structure, including transportation, erection, labour, tools & tackles and allincidental charges complete as required including as required allthe essencial cranes and scafloldings. तटरक्षक परयोजना दल (टिम्बर पॉन्ड) COAST GUARD PROJECT TEAM (TIMBER POND)+ LOGO.

Fabricating, supplying, installing, testing and commissioning of casing caping type LED/ Smps, Front litt height 2.5f & 1.2mm thick perforated GI Strip Navy blue base of size 32'x6't, 2"x1"MS frame with fixing on MS structure with channels, angles Base plates and fasteners 1.8 fons and civil work foundation Horizontal L tyoe angle supports between columns made of channels front anad back structure, including transportation, erection, labour, tools & tackles and all incidental charges complete all as required including all the essencial cranes and scaffoldings. भारतीय तटरक्षक+ INDIAN COAST GUARD+ LOGO. Note : The Above area is highy restriceted area chennai Port Authority, So contractors will be responsible for material and labour in and out gate pass.

Supply and fixing of galvanized High mast light suitable for wind speed 180Km/s, 8 lantern LED flood light Luminaries symmetrically fitted along with their control gear and having two point suspension system with stainless steel wire rope of 6 mm dia and double drum winch with luminaires mounting arm, pulley assembly, aviation obstruction light, lighting arrestor spike including earth work and RCC foundation as per height 20 Mtr with the following technical specification. (a) MAST STRUCTURE:- The high Mast shall be of continuously tapered, polygonal cross section polygon type of 20 Mtrs. in height presenting good visual appearance and shall be based on proven design to given assured performance, reliability and service. The Mast shall have an approximate top diameter of say 150 mm to 200 mm and bottom diameter of 410 mm to 450 mm and PCD 490mm complete.

(b) MAST CONSTRUCTION :- The Mast shall be fabricated from special steel plates of BS EN 10025 grade, cut and folded to form polygonal section and shall be telescopically jointed and fillet welded. The welding shall be in accordance with BS: 5135. The Mast shall be delivered in only 2 sections without any circumferential welding at site, which shall be joined together by slip-stressed-fit method. The joining shall be with stressing equipment, thus forming the sleeve joint. No site welding or bolted the joint will be accepted. The overlap distance shall have full penetration of longitudinal welds. The base plate of the mast shall be at least 25 mm. thick. An adequate door opening min 1400mm x 300mm shall be provided at base of each mast such as to permit clear access to equipment like winches, cable plug and socket, etc. The opening shall be complete with a close fitting vandal resistant, weather-proof door provided with a heavy duty lock. For metal protection of the Mast, the entire fabricated Mast shall be hot dip galvanised internally and externally, having minimum average thickness of 65 microns as per BS EN 1461. (c) DYNAMIC LOADING:- The design life of the Mast shall be min. 25 years. Wind excited oscillation shall be damped by the method of construction and adequate allowance made for the related stresses. The offered High Mast shall be a tested design. The mast should be with stand wind speed 180 Km/s.

(d) FOUNDATION:- The tenderer shall see the site closely and minutely with regard to the nature of the soil, average depth of decomposed garbage and debris at proposed Mast locations and the other site conditions before working out the type of foundation and specifications for the proposed High Mast. The tenderer shall be responsible for the design of the foundation and safe erection and installation of the High Mast in mechanically and structurally safe working condition for the design life of the Mast as per manufacture design The load bearing (safe) capacity of the soil shall be indicted by purchaser to decide the type of foundation and its specifications. The holding down bolts of M30 x 850mm shall be at least 8 nos. of high tensile strength and shall be supplied complete with anchor plate of 6 mm thick for casting into the foundation. The ensure correct vertically and horizontality of bolt alignment. Note : Cost of foundation as per specification of manufacturer shall be deemed to be included in the rate quoted by the contractor (e) LANTERN CARRIAGE:- The fabricated lantern carriages shall be provided for holding fittings and control gear provided on each High Mast. The lantern carriage shall be of special design and of durable steel tube construction designed to act as electric conduit with cable holes fully protected by grummets. The diameter of the lantern carriage shall be suitable so as to hold designed number of LED floodlight fittings, as specified in the tender design along with the control gear boxes and lantern. The lantern carriage shall be fabricated in three parts joined by bolted flanges with SS bolts with nuts to enable easy removal from the erected mast for replacement/ maintenance purpose. The lantern carriage Assembly shall not touch the lower surface of the Mast.

The carriage design and fabrication shall be such that the lantern carriage will suit the lanterns and their control gear boxes to be used in the work. The Lantern Carriage shall be so installed that it does not cause any damage to the surface of the Mast and is provided with protective buffer arrangement. The complete Lantern carriage shall be hot dip galvanised after fabrication. (f) MECHANICAL ARRANGEMENT:- For installation and maintenance purpose, it will become necessary to raise or lower the lantern carriage assembly. To enable this, a suitable winch arrangement shall be provided in the base of the Mast, complete with top pulley, winch stainless steel wire ropes and winch driving power tool. (i) WINCH:- The winch shall be of completely self-sustaining type. the winches shall be of self- sustaining type by means of an oil bath and the lubrication shall be of recommended quality. Winch Capacity 750 Kg. Termination of the ropes of the winch shall be in such a way, that it does not involve distortion or twisting of the rope configuration. The winch shall be designed to be installed or removed form the door opening at the base of the mast. The winch drums shall be grooved to ensure mechanically strong, stable and tidy rope lay with no chances of rope slippage or skippage. The winch shall be capable of operation by hand or by means of external power tool. Integrated power tool with worm is not acceptable. A test certificate shall be supplied along with each winch in support of the maximum load operated by the winch and for the safety of operation at the full load rotation. A handle shall also be provided for hand operation of the winches.

(ii) TOP PULLEY ASSEMBLY:- The top pulleys shall be of a diameter, appropriately large enough to accommodate the steel wire ropes and the multicore electric cable. The material of construction of the pulley blocks shall be non- corrosive and made of dia cast aluminum alloy. The pulley assembly shall be complete with self lubricating bearing and stainless steel spindle. (g) CABLE AND CABLE CONNECTIONS :- The connections shall be made with flat core flexible round sheath power cables of appropriate rating as per the schedule. The base compartment of the High Mast shall have one terminal box for terminating the incomer cable. The maintenance cables equal to that within the Mast and fitted with travelling cable as per OEM recommendation having plug socket shall be provided to energize lanterns while in lowering position by hooking up at the base compartment socket supply. Similarly, the provision shall be made for electric supply at the base compartment to enable operation of the external power tool for lowering or rising of the lantern carriage assembly. The trailing cables of the lantern carriage rings shall be terminated by means of metal cased plug and socket provided in the base compartment to enable flexibility. (h) LIGHTNING FINIAL & AVIATION OBSTRUCTION LIGHTS:- One number heavy duty hot dip galvanised lighting finial shall be provided for each mast. Suitable aviation obstruction lights of reliable design and reputed manufacturer shall be provided on top of each mast. NOTE:- [i] Technical and foundation drawings duly vetted by IIT Madras (or) NIT Trichy (or) Anna University (or) from any Government Engineering colleges shall be submitted by the contractor/OEM for approval of accepting officer before commencement of work.

Supply and fix LED flood light Fitting 350 watt LED, suitable for mounting on High Mast Light structure, IP-66, IK 07 protection, Beam angle min 60 deg, over volatage protection cut off @ 300 VAC + 5%, not less than 110 lumens/ watt, THD <10%, single peice pressure die cast aluminium housing high grade powder coated finish with heat resistant toughned clear glass cover for lamp and control gear compartment with high voltage surge protection of 4 KV driver (SPD 10KV/5 KA) with bolts,nuts & washers complete all as specified and as directed.

Supply and installation factory made and tested (including CPRI type tested certified panel) Timer Panel board, cubical, out door type, plate form mounted, suitable for 415 volts, 3 phase, 4 wire, 50 HZ AC supply system . The panel shall be dust and vermin proof. IP-65 class protection and shall be made of 3.15 mm CRCA MS sheet, and minimum 32x32x5mm thick MS angle iron frame work, powder coated finish over one coat of red oxide primer on outside surface and painted inside with two coats of red oxide primer, front opening type, closing locking arrangement including power wiring with 10 Sqmm PVC insulated solid, copper conductor FRLS cable, IS-694 marked, 1100 volts grade and internal wiring with 1.5 Sqmm copper conductor and comprising of the following:-

(i) MCCB 3 pole , 32 Amps,50 Hz,415 Volts, 10 KA, with thermal magnetic release - 01 No (ii) 3 Pole power contractor, type MNX 110 having 2 NO +2 NC contacts -01 (iii) Analog Time switch , 240 Volt AC , 50 Hz -01 Nos (iv) Auto /manual selector switch -01 No (v) Aluminium bus bar 100 Amps, 4 strip 3 phase and neutral 415 volts, 50 Hz, duly insulated with heat shrinkable PVC sleeves- 01 Set Platform for the timer panel with PCC 1:4:8 type D-2 with 40 mm graded crushed stone, 15 cm thick in foundation, brick work in CM 1:6 with sub class 'B', old size bricks, rendering 15 mm thick in CM 1:6 on exposed surfaces and 100 mm thick PCC padding 1:3:6, type C-1 using 20 mm graded crushed stone aggregate on top and grouting bolts etc for panel. The platform shall be such that it is of a height 45 cm above the nearest road level.