Providing and Fixing Acoustical Wall Paneling in LHC-II.

Amount

Providing and fixing in position wall panelling of approved by Engineer-in-Charge Wood panels estoof width 128mm, thickness of 16mm and length 2440 mm made up of high density fiber board with minimum density of 800 Kg/m3 substrate with a laminated facing / wood veneer as per the approved shade & finish with melamine balancing layer on the reverse side. The boards shall have a special perforation pattern of 2mm groove & 14mm pitch. The panels shall have fire resistance of Class I,BS 476 part 7.The edges of the panels shall be “tongued-and-grooved” to receive special clips for installation. The back of the perforated panel shall have sound absorbing non-woven acoustical fleece and backed with 50mm thick glass wool layer as directed by the Engineer-in-Charge. The panel shall be mounted on special channels using clips as approved by the Engineer -in-charge. Install G.I stud of section 48X34X36 mm or as approved by the Engineer -in- Charge on the solid wall horizontally using screws and plugs at spacing of 600mm centre-to-centre. Screw the aluminium channel (keel) vertically on channelled G.I stud 600mm centre to centre. Install the first set of wooden panels by inserting the clips. For border channel insert the groove of the panel in to the projecting flange of the aluminium clip. Continue installing rows of panels by inserting the tongue into the groove of the earlier inserted panel and progressively installing clips for inside channel into the next aluminium channel (keel) and simultaneously fill the gap between wall & panel by 50mm thick glass wool having density of 48 kg/m3. Continue the process till the actual height is achieved. Use clips for border channel to finish off the installation, finish the edges using wood moulding of matching colour complete in all respect as approved by Engineer-in- Charge. The installed panels should give an NRC minimum of 0.9. Approved Makes -CREDENCE/AMF/TOPAKUSTIK

Providing& fixing in position wall panelling at all heights of thickness 25 mm approved by Engineer-in-Charge Fiber Glass Acoustical Wall Panels of size 600x1200 mm resin bonded square edges having NRC of 0.9 minimum. The panels should be manufactured from high density bio-soluble resin bonded glass wool absorber having density of 96 Kgs/m3 and wrapped on the front side with an acoustically transparent fabric having option of colours and fabric options like jute, mars, etc. as per approved by architect/engineer-in-charge, plain tissue backer and fabric wrapped hardened edges. Panelsshould have humidity resistance up to 90 %, thermal conductivity ≤ 0.03 (m² k / w) thermal resistance ≥ 0.9 (m² k / w) & moisture rate ≤ 1% (JC/T670 – 2005). The panel should be fully recycled and fire retardant as per Class A. The installation comprises a GI framework for acoustic wall paneling as per design drawing (made from especially fabricated galvanized iron sheets 0.55 mm thick pressed section galvanizing @ 120 grams per sqm including both sides) consisting of floor channel of size 50X32X32X0.55 mm thick bottom and top fixed with nylon sleeves and screw. Further vertical GI studs of size 48X34X36X0.55 mm thick are placed at 600 mm center to center vertically on the wall using 12 mm dia 50 mm long wedged type expanded zinc alloy dash fastener with 10 mm bolt, to avoid any undulations on the wall. The extra channel must be used at openings and junctions as required. Further, wooden batten of 6mm thickness and a width of 5” to be placed at 600 mm center to center horizontally on the vertical GI Studs. Surface impalers of size 3”X4” having projecting element called spikes shall be fixed on the wooden batten surface at 1200 mm center to center horizontally and 600 mm center to center vertically, using self tapping screws.Silica based construction adhesive to be dabbed on to the projecting elements (spikes) of the impalers. Wall Panels shall be pierced through the spikes of the impalers ensuring line & level of panel are maintained. The panels should be mounted on the impalers horizontally or vertically as per the approved design or drawing complete in all respect as per instructions of the engineer-in-charge. Approved Makes -CREDENCE/AMF/TOPAKUSTIK

CLASSIC DECORATOR

AK JAIN AND ASSOCIATES

Sunehari Bagh Builders Pvt. Ltd.