REPLACEMENT OF DAMAGED SHEETING, STRENGTHENING OF CORRODEDSTEEL STRUCTURES AND PAINTING OF TRACK HOPPER-1, COAL CONVEYORGALLERY FROM TRACK HOPPER -1 TO UNIT# 1 POWER HOUSE

Amount

Dismantling/ removing of old AC/ GI/ Al/ FRP sheets including ridge, valley gutter etc and stacking properly the serviceable materials and disposal of unserviceable materials to designated areas (scrap yard) all complete for all elevation as per the specifications and directions of the Manager-in-charge.

Providing and fixing precoated sheets of TATA Bluescope LYSAGHT TRIMDEK 1015 or equivalent including Ridges plain (upto 600mm)/ Flashings/ Aprons (Upto 600 mm)/ Barge board (Upto 300 mm) etc. The sheets shall be manufactured out of nominal 0.45 mm Base Metal Thickness (BMT) , high tensile steel with minimum 550 MPa yield strength, metallic hot dipped coated with Al-Zn alloy (55% Aluminium. 43.5% Zinc, 1.5% Si), coating class AZ150 (min. 150 g/sqm total on both sides) as per IS 15961. Total coated thickness and Total Painted thickness of the sheets shall be 0.50 mm and 0.53 mm respectively. The sheets shall have a total coating thickness of 35 microns comprising of super durable polyester top coat of 20 microns on exposed surface, 5 micron reverse polyester coat on back surface and over 5 micron primer coat on both surfaces of approved colour suitable for exterior application conforming to IS 15965 class 3. The Sheets should have protective guard film of 25 microns minimum to avoid scratches during transportation and should be supplied in single length upto 6 metre. The sheets shall have brand mark at regular intervals on the reverse side of profile including name of the profile and Total Paint Thickness for confirming genuinity of the material. The manufacturer's test certificate for the chemical and mechanical properties must be submitted for approval by the concerned authority prior to installation. The sheet shall be fixed using self drilling /self tapping steel screws of Hilti/ Tata Bluescope/ Jindal stainless steel of size (5.5x 55 mm) with EPDM seal, all complete upto any pitch in horizontal/ vertical or curved surfaces, excluding the cost of purlins, rafters and trusses and including cutting to size and shape, sealing of openings/ holes wherever required for all elevation as per specifications and directions of Manager-in-charge.

Providing & fixing 2 mm thick UV stabilized fiberglass reinforced plastic (FRP) sheets (trough sheet of size, shape and pitch of corrugation as approved by M-I-C). They shall be of uniform pigmentation and thickness without air pockets and shall conform to IS 10192 and IS 12866.The sheets shall be opaque or translucent, clear or pigmented, textured or smooth as approved by M-I-C. The sheet shall be fixed using self drilling /self tapping steel screws of Hilti/ Tata Bluescope/ Jindal stainless steel of size (5.5x 55 mm) with EPDM seal, all complete upto any pitch in horizontal/ vertical or curved surfaces, excluding the cost of purlins, rafters and trusses and including cutting to size and shape, sealing of openings/ holes wherever required for all elevation as per specifications and directions of Manager-in-charge.

Providing and applying Two component High build polyamine adduct cured Epoxy coating (two or more coats) Sigmashield 880 of Asian paints PPG or equivalent product of Berger/Akzo Nobel make of any approved shade, prepared and applied as per manufacturer's specifications on steel structure including necessary surface preparation like water washing, solvent cleaning (if required), power tooling/ hand tooling to clean the surface from loose dust, dirt, pill out paint, rust or any other foreign materials including the cost of all materials, labour, scaffolding etc. & removal of the scaffolding after the painting is over all complete at all elevation as per specifications and directions of M-I-C. The vital minimum physical and chemical parameters of the paint shall be as under : Mass density- 1.50 kg/l (minimum), Volume solids - 85% (minimum), VOC- 207 g/l(minimum), Total DFT - 350 µm (minimum). Note: Paint application shall be through Airless Spray. Wherever spray painting is not possible, brush application can be done with prior approval of MIC.

Providing and applying Two component Aliphatic acrylic Polyurethane Top coat (One or more coats of Sigmadur 550 of Asian paints PPG or equivalent product of Berger/ Akzo Nobel make) over Two component surface tolerant, High build polyamide cured Epoxy intermediate coat (one or more coats of Sigmacover 620 of Asian paints PPG or equivalent product of Berger/ Akzo Nobel make) over Two component surface tolerant, High build polyamine cured Epoxy primer coat (one or more coats of Sigmacover 630 of Asian paints PPG or equivalent product of Berger/ Akzo Nobel make) of any approved shade, prepared and applied as per manufacturer's specifications on steel structure including necessary surface preparation like water washing, solvent cleaning (if required), power tooling/ hand tooling to clean the surface from loose dust, dirt, pill out paint, rust or any other foreign materials including the cost of all materials, labour, scaffolding etc. & removal of the scaffolding after the painting is over all complete at all elevation as per specifications and directions of M-I-C. The vital minimum physical and chemical parameters of the paint shall be as under : 1. Top coat: Mass density- 1.30 kg/l (minimum), Volume solids -55% (minimum), VOC- 430 g/l(minimum), DFT - 50 µm (minimum). 2. Intermediate coat: Mass density- 1.50 kg/l (minimum), Volume solids -80% (minimum), VOC- 225 g/l(minimum), DFT - 100 µm (minimum). 3. Primer coat: Mass density- 1.40 kg/l (minimum), Volume solids -83% (minimum), VOC- 232 g/l(minimum), DFT - 100 µm (minimum). Note: Paint application shall be through Airless Spray. Wherever spray painting is not possible, brush application can be done with prior approval of MIC.

Fabrication of steel structure in single or built up sections made out of all types of steel sections including carting from NALCO store, cutting, welding, grinding, brushing, cleaning the surface and applying a priming coat of approved steel primer (red oxide zinc chromate of Asian/ Berger make), return of surplus, scrap steel to NALCO stores/ scrap yard etc including the cost of all transportation, labour, consumables, tools etc., all complete at any elevation as per the specifications and direction of the Manager-in-charge. (Structural steel will be issued free of cost at NALCO store)

Erection of steel structure in single or built up sections made out of all types of steel sections including the cost of welding, bolting, consumables, labour, tools, hoisting arrangement, transportation, cutting grooves/ holes for proper alignment etc all complete at any elevation as per the specifications and direction of the Manager-in-charge.

Dismantling of steel structure made of all types of single or built up section by necessary gas cutting/chiseling, hammering, cutting groove, making holes if necessary by chipping, stacking properly the serviceable materials for reuse and disposal of unserviceable materials to designated areas (scrap yard) all complete for all elevation as per the specifications and directions of the Manager-in-charge.

Providing and fixing steel windows /ventilators etc. fixed/openable type (Top hung/side hung) glazing using I.S:1038 section as per drawing, joints mitered and welded, including providing and fixing 4mm thick plain glass panels with aluminium beading fitted with nut & bolt, with approved make steel oxidized fittings and 12mm M.S. square bars at the rate of 100mm C/C, painting with two coats of approved synthetic enamel paint of of Asian paints/ Berger/ Akzo Nobel make over a coat of red oxide zinc chromate primer etc. all complete for all elevation as per the specifications and directions of the Manager-in-charge.

Rajesh construction