Acoustic wall panelling and acoustic false ceiling works at new CVPS area, Main Office Building, RBI, Ahmedabad

Wall and Column Panelling - Providing and Fixing Channeled perforated panels of approx. dimensions of length 2400 mm, width 192mm and thickness of 15mm or any other dimensions approved by Banks Engineer, made of a Moisture resistant fibre board substrate with a laminated facing as per the approved shade (Portland Maple, Sea Beech, Siam Wood & Mystique Walnut, Interior White or any other shade approved by Banks Engineer) and a melamine balancing layer on the reverse side. The boards shall have a special perforation pattern where the reverse surface has a “Helmholtz” fluted perforation with consecutive 3mm wide groove followed by 13mm or any approved dimensions of visible pane. The edges of the panel shall be “tongue-and-grooved” to fix special clips for installation and seamless visual. The back of the perforated panel shall have sound absorbing non-woven acoustical fleece hot pressed to achieve NRC of more than 0.5 and Humidity Resistance (RH) of 70% with camber limit less than 1mm/1000mm and bow less than 1mm/300mm.The panels shall be mounted on special aluminium splines (keel) using inside clips as per Manufacturer specifications etc. complete all as directed by the Banks Engineer. The panel shall be mounted by tongue and groove mechanism using inside clip on aluminium extruded keel made of Grade 6063-T5 having dimensions 3000(L) x 24(H) x 15.5(W). The keel shall also be used for transition of the butt end of adjacent panel at every 7.2m. The rate shall suitably include the following: a) Making suitable cut-outs and providing sufficient quantities of G.I adjustable hangers/danglers for light fittings, grills, diffusers, etc. as per requirement of the site condition. b) Preparing required designs, patterns, drops, sunk etc. Note:- Only visible plan area will be measured in the item and considered for payment. c) Making openings for the provision of necessary electrical works. d) Erecting sturdy and stable scaffolding including adhering to all safety precautions all complete and as directed by Bank’s Engineer. e) Thorough cleaning & removal of dust, cobwebs, stains & debris etc. from the area before commencement of the work, before fixing panel and after completion of work.

False Ceiling- Gypsum false ceiling - Providing and fixing gypsum false ceiling of approved make at all height consist of approved make GI framework of grid 1200mm x 600mm made of special galvanised sections and approx. 12.5 mm thick (minimum) tapered edges gypsum plane board complete all as per manufacturers specification. The quoted rate shall be including jointing and finishing to a flush finish of tapered and square edges of the board with recommended jointing compound, jointing tapes, drops in the false ceiling, finishing with jointing compound in 3 layers covering up to 150 mm on both sides of joint, all as per manufacturer’s specification. Rate to include cost towards cutting, making cut-outs of required sizes as per services requirement and as directed and making good for any electrical, FA, PA, CCTV, Networks etc., Fixtures as of any size and shape. Rate to be quoted including necessary additional framing member as per services requirement and any level difference for any drop/ step up. All system to be fixed as per manufacturers recommendations. Contractor to ensure the stability of the entire system of false ceiling etc. complete as design/directed by Banks Engineer. The work shall include erection of sturdy and stable scaffolding including adhering to all safety precautions all complete and as directed by Bank’s Engineer. Note:- Only visible plan area will be measured in the item and considered for payment.

False Ceiling- Acoustic Grid False Ceiling - Providing & Fixing of Fibre Glass Acoustical Suspended Ceiling System with 15mm thick Microlook 90 Edge Tiles with 15mm face exposed grid. The tiles shall have smooth laminated visual with Humidity Resistance (RH) of 95%, NRC 0.85 – 0.95 as per ASTM C423 standard, Light Reflectance ≥88% as per ASTM E-1477, Colour Pebble White or as approved by Banks Engineer, 8mm drop in module size of 600 x 600mm. Suspension: The tile shall be laid on T section flanges, colour global white having roll formed double stroke rotary stitching on all T sections i.e. the Main Runner, 1200 mm & 600 mm Cross Tees. The deflection loading of the system shall be 12.5 kg/m2 (as per standard installation layout mentioned below) and main beam tested as per ASTM C635 (Deflection limit less than L/360) with a deflection loading of 15kg/m. The end details of the cross tee shall be made of pre hardened steel and fixed to the ends of the cross tee to provide double locking between “cross tee to cross tee” and “cross tee to main beam”. All main beam to main beam and cross tee to cross tee connection shall have a pull-out strength of more than 100 Kg. The T Sections shall be made of hot dipped galvanized steel of 90 GSM as per IS 277 (2003) and pre-painted steel with baked polyester paint. All border cross tee/main beam shall be levelled using perimeter fill. Installation: To comprise main runner spaced at 1200mm securely fixed to the structural soffit using suspension system (specifications above) at 1200mm maximum. The First/Last suspension system at the end of each main runner shall not be greater than 450mm from the adjacent wall. Flush fitting 1200mm long cross tees to be interlocked between main runners at 600mm to form 1200 x 600 mm module. Cut cross tees longer than 600mm require independent support. 600 x 600mm module to be formed by fitting 600mm long flush fitting cross tees centrally between the 1200 mm cross tees. Perimeter trim to be wall angles of size 3000x19x19mm, secured to walls using screws at 450mm center to center maximum. Installation shall be carried out as per Manufacturer recommended procedure. Suspension System accessories supplied by Manufacturer consisting of M6 Anchor Fasteners with hanger hole, pre-straightened hanger wire of dia – 2.5 mm of 1.80 m length having a tensile strength of 344-413 MPa and a minimum loading strength of 110 kgs. (Optionally, adjustable hook clips made of 0.7mm thick Grade 1 C55 galvanized spring steel of dimension 100 x 20mm and 4 mm aquiline wire to be used for level adjustment during installation purpose in main runners). Note: - 1. Only visible plan area will be measured in the item and considered for payment. 2. The work shall include erection of sturdy and stable scaffolding including adhering to all safety precautions all complete and as directed by Bank’s Engineer.

Viewing Gallery Counter Size :2'3" Wide- The structure of the counter shall be made out of BWR grade 18 mm thick plywood with all open edges covered with beading. The counter shall be supported by end panels, mid panels at every 1 meter and supports as per site requirements if any as per instructions of the Banks Engineer. The counter shall have a modesty panel of 12mm thick plywood. The non-visible part of the counter shall have 0.8mm balancing laminate as per site requirement. The counter shall work as an independent structure. The counter shall have an openable drawers of width 400mm and depth 100mm for each seating as per site conditions and as per the instructions of the Banks Engineer. There should be provision for cable manager system with necessary cut-outs in top surface. All the wooden borders / members shall be in melamine matt polish finish etc. complete all as per directions of the Banks Engineer.