GE I R AND D/CHD-29/2026-27 CERTAIN REPAIR TO ROOFS CHAJJA AND OTHER ALLIED WORKS IN ZONE-I, ETF,AAG, GUN GROUP AND DOMESTIC AREA, ZONE-II TO VIII, RTRS AT TBRL RANGE RAMGARH

Demolishing brick tile covering in terracing including stacking of serviceable material and disposal of unserviceable material within 50 metres lead complete all as specified and directed.

Demolishing of mud in roofs, any thickness, including plastering and leeping (whether full thickness removed or only a part thereof) and disposal of material within 50 metre lead complete all as specified and directed.

Removing existing water proofing APP/blace top treatment and removing rubbish material out side of site complete all as specified and directed.

Material and labour for roughening surfaces of old concrete floor by picking, sweeping clean and washing down with water to remove dust, etc complete all as specified and directed.

Material and labour for cutting out cracks to V-section in existing roofs or terracing, cleaning out, wetting, grouting with cement and sand slurry 1:3 complete all as specified and directed.

Material and labour for 25 mm thick cement concrete type B-0, 1:2:4 (12.5mm graded aggregate) complete all as specified and directed.

Material and labour for cement concrete type B-0 , 1:2:4 (Using 12.5 mm graded aggregate) in roof kerbs, mud stops, rounded or chamfered on edges complete all as specified and directed.

Material and labour for high performance Hybrid Polyurea waterproofing coating spray/hand applied liquid membrane with following specifications: (a) Elongation of range 400% to 600%. (b) Tensile strengthof 8-12N/mm2. (c) Crack bridging ability of 3.00-4.00mm. (d) Hardnes (Shore "A" ASTM D2240) of range 50-70.The application shall include final base preparation, epoxy primer application in rato 1.1 (resin: hardner) with 100% water dilution and application of Hybrid polyurea in two coats in 6 hrs interval to achieve total min thickness 1 to 1.50mm. The application/ treatment shall be carried out by authorized rep of approved specialist firm/manufacturer. A sample has to be prepared by applicator before starting of work on ground and this sample to be approved by GE. Make- SIKA/FOSROC/Asian Paints/Berger. Note:- The defect liability period of water proofing treatment to RCC roof slab including sunken floor shall be 10 years and the contractor shall be responsible to keep the entire building(s) free From leakage/seepage for a period of 10 years after certified date of completion. The contractor may obtain a similar guarantee from the specialist firm engaged by him for the purpose. (b) Contractor has to bring entire quantatity (as per manufacturer instruction for coverage area per unit of material) of water proofing material in one go and to be deposited in MES store. MES JE will issue material for use at site on daily basis and all empty cane shall be kept in MES store untill entire work of water proofing is completed as per CA. (c) Contractor shall submit original purchase voucher as soon as material arrived at site, for verification of required quantity of material as per manufacturers instruction.

Material and labour for rendering 15 mm thick on fair faces of brick work surfaces in wall with CM (1:3) finished smooth and even without using extra cement complete all as specified and directed.

Material and labour for applying evenly a tack coat of industrial bitumen 85/25 at the rate of 1.20 kg per sqm including cleaning of surfaces complete all as specified and directed.