External Repair Works of Three blocks in Digha Staff Quarters (Block A, B and C) of R.B.I Patna

Dismantling of old plaster, raking out joints and cleaning the surface for plaster including stacking of rubbish to dumping ground at a suitable location as approved by Bank's Engineer. Rate shall be inclusive of disposal of building rubbish/ malba / similar unserviceable, dismantled or waste materials by mechanical means, including loading, transporting, unloading to approved municipal dumping grounds or as approved by bank’s Engineer-in-Charge, beyond 50m initial lead, for all leads including all lifts involved. Note: Dismantling of damaged plaster area should be carried out after approval from Bank’s Engineer. Providing and fixing double scaffolding system (cup lock type) on the exterior side, up to seven story height made with 40 mm dia. M.S. tube 1.5 m centre to centre, horizontal & vertical tubes joining with cup & lock system with M.S. tubes, M.S. tube challis, M.S. clamps and M.S. staircase system in the scaffolding for working platform etc. and maintaining it in a serviceable condition for the required duration as approved and removing it thereafter. The scaffolding system shall be stiffened with bracings, runners, connection with the building etc wherever required for inspection of work at required locations with essential safety features for the workmen etc. complete as per directions and approval of Engineer-in-charge. The quoted rate for the item shall be inclusive of rate of the scaffolding. Scaffolding shall be retained till end of the work. It shall not be measured for payment purpose.

Providing, mixing and applying bonding coat of approved adhesive on wall exposed after chipped portion of plaster as per specifications and direction of Bank's Engineer etc. complete in all respect. SBR Polymer (@10% of cement weight) modified cementitious bond coat @ 2.2 kg cement per sqm of surface area mixed with specified proportion of approved polymer. Providing, mixing and applying SBR Polymer (of approved make) modified cement mortar in proportion of 1:4 (1 cement:4 graded coarse sand with polymer minimum 2% by wt. of cement used) as per specifications and directions of Engineer-in-charge. Min. 25 mm average thickness or more in 2 layers for matching adjoining surface in level and finish and as directed by Bank’s Engineer

Chipping of unsound/weak concrete material from slabs, beams, columns, chajja etc. with manual chisel and/or by standard power-driven percussion type or of approved make including tapering of all edges, making square shoulder cavities including cleaning the exposed concrete surface and reinforcement with wire brushes etc. and disposal of debris for all leads and lifts all complete as directed by Bank's Engineer. Min. 25 mm average thickness or more for matching adjoining surface in level and finish and as directed by Bank’s Engineer Note: Dismantling of damaged RCC area should be carried out after approval from Bank’s Engineer. Cleaning of reinforcement of rust from the reinforcement bars to give it a total rust-free surface by using alkaline chemical rust remover of approved make with paint brush and remove loose particles after 24 hours of its application with wire brush and thoroughly washing with water and allowing it to dry, all complete as per direction of Bank's Engineer. Bars up to 12mm dia. Providing, mixing and applying bonding coat of approved adhesive on chipped portion of plaster as per specifications and direction of Bank's Engineer etc. complete in all respect. SBR Polymer (@10% of cement weight) modified cementitious bond coat @ 2.2 kg cement per sqm of surface area mixed with specified proportion of approved polymer. Providing, mixing and applying SBR Polymer (of approved make) modified cement mortar in proportion of 1:4 (1 cement:4 graded coarse sand with polymer minimum 2% by wt. of cement used) as per specifications and directions of Engineer-in-charge. Min.12 mm average thickness or more for matching adjoining surface in level and finish and as directed by Bank’s Engineer Note: Rate shall include the cost of centering, shuttering and finishing & extra scaffolding if required.

Reinforced cement concrete work in beams, suspended floors, roofs having slope up to 15degree landings, balconies, shelves, chajja, lintels, bands, plain window sills, staircase and spiral staircase above plinth level up to floor five level including the cost of centering, shuttering, finishing & extra scaffolding if required and excluding reinforcement with 1:1.5:3 (1 cement: 1.5 coarse sand (zone III) derived from natural sources: 3 graded stone aggregate 20mm nominal size derived from natural sources.)

Providing, bending, binding, cutting and laying reinforcement for RCC work of different diameter viz. 6mm/ 8mm/ 10mm/ 12mm etc., at any level and including extra scaffolding if required in the concreting works as per directions & instructions of the Bank’s Engineer. Thermo-Mechanically Treated bars of grade Fe-500D or more