Replacement of Motors and Break Shoes of Spillway Shutter in Thoppaiyar Dam in Nallampalli Taluk of Dharmapuri District.

Replacement of weak motors ,breakshoes and renewal of existing starters as per the following specifications. The existing worn-out motor shall be removed from its position, and the pinion wheel shall be detached from the motor shaft. The new motor base shall be matched to the existing hoist base frame and modified as required. The bore of the pinion gear wheel shall also be modified to fit the new motor’s output shaft. The new motor, rated at 400V, 3-phase, 10 HP, and 960 RPM, shall then be properly seated in the motor mount. The pin bush coupling shall be attached to the new motor's output shaft. The existing hand operation mechanism shall be integrated into the system, and the existing electrical connections and wiring shall be properly connected to the starter. The existing relay shall be replaced with new one in suitable to 10HP motor. The cost includes cost of materials, labour charges, transport, erection , testing, commissioning etc., complete complying with standared specification and as directed by the Departmental Officers. (inclluding Waranty and Maintenance for 5 years)

Fabrication and erection for Thoppaiyar spillway shutters of operating platform shed size of 54 meter x 2.70 meter Using ISMC 100 Length of 3metres-2.6 Nos., for Column, ISMC100 length of 2.5 meters -18 Nos., for Column, , ISMC100 length of 3.1 meters -18 Nos., for Top Portion, ISA65x65x6 length 54 meters -4 Nos., 10mm Thickness Plate 150 x150mm – 108 Nos., Cleat Angle ISA65x65x6 Length of 50mm-72Nos., for Top Portion 168 Sq. Meter Colour Galvanized Sheet Laying etc., complete complying with standared specification and as directed by the Departmental Officers. (inclluding Waranty and Maintenance for 5 years)

Application of a high performance primary coating to protect the steel structure from highly abrasive, erosive and corrosive environments. This being a industrial coating, enhances the life of the structure and reduces the strain of continuous maintenance. After surface preparation of the structure, a primer coat with epoxy primer shall be applied. The dry film thickness should be 40-60µ for primer coat. The colour is grey and minimum pot time should be 4 to 8 hours. The mixing ratio of base to accelerator by volume should be according to the manufacturers standard. All paint, when applied, shall provide a satisfactory film and a smooth and even surface. Paint shall be thoroughly stirred, strained, and kept at the uniform consistency during application. Paint shall not be applied when the temperature of the metal or surrounding air is below 10 degree Celsius and that of the metal is above 50 degrees Celsius, or when the humidity is above 90 percent, or when it threatens to rain before the painted coat gets dry. Primer coat shall be protected during the initial curing period against the possibility of moisture condensation or contamination with foreign matter. All painting works shall be performed by airless spraying. When the coating material is applied by spraying, suitable means shall be provided to prevent segregation during the coating operation. Free oil and moisture shall be removed from the air supply lines of all spraying equipment. Primer coat shall be uniform and free from runs, slag and other imperfections. The time between successive coats shall be not less than the minimum nor more than the maximum re-coating time specified by the paint manufacturer.

The paint shall be applied so that the thickness at any point is not less than that stipulated in the approved painting specifications. Surface not required to be coated, but adjacent to surfaces which are to be cleaned and coated, shall be adequately protected during cleaning and coating. Repairs to damaged areas of the coating shall be carried out strictly in accordance with the approved painting specifications. Because of the flammable and toxic nature of the coating materials, precautions should be taken to eliminate any health or safety hazard that may arise during the application of the coating. Smoking and welding shall not be allowed within 10 meters of the place when painting is in progress. The painting to the gates, hoists and other parts shall be done as per IS specification No.14177-1994. Guidelines for painting system for Hydraulic Gates and hoists and its Adjuncts Viz., IS: 1477 (Part I) – 1971, IS : 1477 (part II) -1971. The cost includes cost of primer & thinner, labour charges for application of primer, hire charges for compressor, generator & airless spray gun with its accessories, cost of oil, diesel & lubricant for generator, scaffolding charges, conveyance of machinery & tools to and fro from site of work, risk allowance, etc., complete complying with standared specification and as directed by the Departmental Officers. (inclluding Waranty and Maintenance for 5 years)

Application of coaltar epoxy over the primer shall be through airless spray method. The colour shall be black and the mixing ratio of base to accelerator should be by manufacturer standards. The dry film thickness should be between 125-150 µ per coat. The interval before over coating shall be 24 hours. All paint, when applied, shall provide a satisfactory film and a smooth and even surface. Paint shall be thoroughly stirred, strained, and kept at the uniform consistency during application. Paint shall not be applied when the temperature of the metal or surrounding air is below 10 degree Celsius and that of the metal is above 50 degrees Celsius, or when the humidity is above 90 percent, or when it threatens to rain before the painted coat gets dry. Each coat shall be protected during the initial curing period against the possibility of moisture condensation or contamination with foreign matter. All painting works shall be performed by airless spraying. When the coating material is applied by spraying, suitable means shall be provided to prevent segregation during the coating operation. Free oil and moisture shall be removed from the air supply lines of all spraying equipment. Each coat shall be uniform and free from runs, sags and other imperfections. The time between successive coats shall be not less than the minimum nor more than the maximum re-coating time specified by the paint manufacturer. The paint shall be applied so that the thickness at any point is not less than that stipulated in the approved painting specifications. Surface not required to be coated, but adjacent to surfaces which are to be cleaned and coated, shall be adequately protected during cleaning and coating. Repairs to damaged areas of the coating shall be carried out strictly in accordance etc., complete complying with standared specification and as directed by the Departmental Officers. (inclluding Waranty and Maintenance for 5 years)