Modernization of Chennai Airport (Phase-II), Chennai. SH- Interior, False Ceiling, Partitions Vestibules and allied works for Terminal Building Part-2 at Chennai Airport- Balance work

Sub Head 01 - Column Cladding

Design, supply, fabrication, and installation of stainless-steel matte finish column cladding (both straight and curved profiles) using SS sheets of Grade: IS 316 (marine-grade, corrosion-resistant)Thickness: 1.5 mm (minimum) as per ASTM A480 / A480M standards, pasted with Industrial-grade neutral-cure silicone adhesive (UV resistant, non-acetic) suitable for SS-to-substrate applications. The cladding should be done over a sub structure made of 8 mm thick flexi, BWP grade plywood (conforming to IS:710), with fire retardant properties (tested to IS/BS/ASTM standards)fastened with necessary counter head SS screws at required intervals over a frame work of Aluminium Box sections 48X48X2 mm vertical at intervals of 400mmc/c and horizontal not morethan 1200mm c/c bent to shape as per structural requirement with 15 micron natural anodised finish using necessary GI brackets and SS 304 fasteners. All components (including substrate and adhesive) must comply with local fire safety regulations. SS cladding system shall be corrosion-resistant and maintenance-free for a minimum of 10 years in normal atmospheric conditions. Cladding shall be Open joint with the gap filled with weatherproof silicon sealant of 791 grade(Non stain/Non-bleeding type).The rate shall include all materials, cost of preparing appropriate substrate surface over the civil structure, and complete installation — including curved or straight profiles which require thermoforming, along with necessary dies, templates, and specialized forming methods, wastages, all labour, scaffoldings, power, water, tools and tackles, transport, storage, lead and lift to the desired location etc., complete as required. All works to be executed as per the direction of the Engineer-in-Charge and in accordance with approved specifications and drawings. Adequate cut outs/push doors for electrical/MEP/IT/AS provisions to be provided wherever necessary.

Design, supply, fabrication, and installation of of Zinc Titanium Panelling for Columns with 1.5 mm thick Zinc Titanium Pigmento finish, (both straight and curved profiles), pasted with Industrial-grade neutral-cure silicone adhesive (UV resistant, non-acetic, suitable for Zinc-to-substrate applications. The cladding should be done over a sub structure made of 8 mm thick flexi, BWP grade plywood (conforming to IS:710), with firenretardant properties (tested to IS/BS/ASTM standards)fastened with necessary counter head SS screws over a frame work of Aluminium Box sections 48X48X2 mm verticals at intervals of 400mmc/c and horizontal not morethan1200mm c/c bent to shape as per structural requirement with 15 micron natural anodised finish using necessary GI brackets and SS 304 fasteners. All components (including substrate and adhesive) must comply with local fire safety regulations. Zinc cladding system shall be corrosion-resistant and maintenance-free for a minimum of 10 years in normal atmospheric conditions. Cladding shall be Open joint with the gap filled with weatherproof silicon sealant of 791 grade(Non stain/Non-bleeding type).The rate shall include all materials, cost of preparing appropriate substrate surface over the civil structure, and complete installation — including curved or straight profiles which require thermoforming, along with necessary dies, templates, and specialized forming methods, wastages, all labour, scaffoldings, power, water, tools and tackles, transport, storage, lead and lift to the desired location etc., complete as required.All works to be executed as per the direction of the Engineer-in-Charge and in accordance with approved specifications and drawings. Adequate cut outs/push doors for electrical/MEP/IT/AS provisions to be provided wherever necessary.

Design, Supply and fixing Zinc Composite Panel (ZCP) for columns cladding of approved shade made out of Zinc Titanium alloy sheet (Conforming to EN988 Standards) of 4mm thick Zinc Composite Panel (0.5mm +3mm + 0.5mm) material consisting of 3mm FR Grade Mineral Core sandwiched between on front Zinc Titanium alloy sheet and back Aluminum alloy sheet having a Service Coat. The Make of 0.5 mm thick Zinc Titanium Sheets used for Manufacturing of Zinc Composite shall be same as the 1.5 mm thick Zinc Titanium sheets used for Column Cladding /wall cladding. The weight of panel should be minimum 9.3 kg/sqm. The ZCP product must conform to EN 13501 class B s1 d0 and two-hour fire resistance as per ASTM E119. Fixed using stainless steel 304 grade screws, nuts, bolts, washers, cleats, filled with weather silicone non streaking sealant 791 (colour as approved by the Architect), backer rods etc. The fastening brackets of Aluminium alloy 6005 T5 or MS with Hot Dip Galvanised finish with Nylon separators to prevent bi-metallic contacts. Framework: Mild Steel hot dipped galvanized (60 microns) C brackets of size 75mm x 50 mm x 6 mm with slot of 8mm x 15mm are fixed to the existing RCC columns or any other backing surface. Aluminium hollow section / tube of size 38mm x 50mm of 2mm thick shall be fixed to these brackets both vertically and horizontally by using M6 x 75mm stainless steel bolts and nuts. The framework can easily be aligned for plumb and straightness panel fixing. Panel Fixing: Composite panels are cut to size, routed, corners notched and bend as per the dimensions specified. After the panels are bend aluminium cleats of size 16mm x 16mm by 40mm length are fixed to the edge of the panels by using aluminium pop rivets. The panels are fixed to the framework by using 2 nos. stainless steel screws per cleats. The gap between the panels (both vertical and horizontal) are filled with backer rod & non stain weatherproof silicon sealant as specified earlier. Only the visible finished surface area of ZCP cladding will be measured for payment, rate shall be inclusive of all type of folds / returns required to form a panel. The rate shall also include the cost of all materials as above like cost of FR grade ZCP sheet, aluminium framing sections with 15-micron anodic coating, M.S galvanized brackets, silicon, involved in all the operations described above including cartage, wastages, all labour, scaffoldings, power, water, tools and tackles, transport, storage, lead and lift to the desired location etc., complete as required.All works to be executed as per the direction of the Engineer-in-Charge and in accordance with approved design, specifications and drawings. Adequate cut outs/push doors for electrical/MEP/IT/AS provisions to be provided wherever necessary. The finished surface shall be protected with a self-adhesive peel off foil with 80 microns thickness (white or black) tested to with stand at least 6 months exposure to local weather condition without losing the original peel off characteristic or causing stain or other damages on the coated surface of the Zinc composite panel. If the stain or any damage noticed after peeling off by the fabricator, such panel should be replaced with new one of the same shade and color, at no extra cost.

Stainless steel cladding with Glossy Gold/Matte finish Champagne strips Design: supply, fabrication, and installation of stainless steel column cladding (both straight and curved profiles) using SS sheets of Grade: AISI 316 (marine-grade, corrosion-resistant)Thickness: 1.5 mm (minimum) as per ASTM A480 / A480M standards, pasted with Industrial-grade neutral-cure silicone adhesive (UV resistant, non-acetic, suitable for SS-to-substrate applications. The cladding should be done over a sub structure made of 8 mm thick flexi, BWP grade plywood (conforming to IS:710), with Fire retardant properties (tested to IS/BS/ASTM standards)fastened with necessary counter head SS screws at required intervals over a frame work of Aluminium Box sections 48X48X2 mm vertical at intervals of 400mmc/c and horizontal not morethan 1200mm c/c bent to shape as per structural requirement with 15 micron natural anodised finish using necessary GI brackets and SS 304 fasteners. All components (including substrate and adhesive) must comply with local fire safety regulations. SS cladding system shall be corrosion-resistant and maintenance-free for a minimum of 10 years in normal atmospheric conditions. Cladding shall be Open joint with the gap filled with weatherproof silicon sealant of 791 grade(Non stain/Non-bleeding type).The rate shall include all materials, cost of preparing appropriate substrate surface over the civil structure, and complete installation — including curved or straight profiles which require thermoforming, along with necessary dies, templates, and specialized forming methods, wastages, all labour, scaffoldings, power, water, tools and tackles, transport, storage, lead and lift to the desired location etc., complete as required. All works to be executed as per the direction of the Engineer-in-Charge and in accordance with approved design, specifications and drawings. Adequate cut outs/push doors for electrical/MEP/IT/AS provisions to be provided wherever necessary.

TREE COLUMNS Design, supply, fabrication, and installation of Zinc Titanium Panelling for Tree Columns as per design/approved drawing with 1.5 mm thickQuartz Strat Zinc Titanium & RAL1036 Zinc Titanium Panels (both straight and bend profiles), pasted with Industrial-grade neutral-cure silicone adhesive (UV resistant, non-acetic, suitable for Zinc-to-substrate applications. The cladding should be done over a sub structure made of 8 mm thick flexi, BWP grade plywood (conforming to IS:710), with fire retardant properties (tested to IS/BS/ASTM standards) fastened with necessary counter head 8X19 SS screws(304 grade) at required intervals over a frame work of Ms tubular sections 50X25X3.2 mm for Ribs and 25X25X3.2 for plain area connected/welded to 6mm thick ring plate to desired shape and profile as per GFC using M10 bolt nut and washers of SS 304 grade. The entire arrangement is connected to the RCC column/Steel structure with 75X75X6 mm equal angles to the desired length with 6mm base plate welded to it. The MS bracket75X75X6 is connected to the collum with M8-70 HSAR Anchor fasteners of approved make. All MS structural supports finished with a coat of anticorrosive primer of approved make and two coat of PU paint (DFT as per standards). All components (including substrate and adhesive) must comply with local fire safety regulations. Plywood backing must be tested for fire retardance . Zinc cladding system shall be corrosion-resistant and maintenance-free for a minimum of 10 years in normal atmospheric conditions. Cladding shall be butt joint with no gap. weatherproof silicon sealant of 791 grade(Non stain/Non-bleeding type) shall be used for filling minor gaps and interfaces. The rate shall include all materials, cost of preparing appropriate substrate surface over the civil structure for various shapes ad per drawing, coordination with false ceiling vendor for interface termination and complete installation — including curved or straight profiles which require thermoforming, along with necessary dies, templates, and specialized forming methods, wastages, all labour, scaffoldings, power, water, tools and tackles, transport, storage, lead and lift to the desired location etc., complete as required. Structural stability certificate shall be provided along with shop drawings. All works to be executed as per the direction of the Engineer-in-Charge and in accordance with approved specifications and drawings. Adequate cut outs/push doors for electrical/MEP/IT/AS provisions to be provided wherever necessary. The rate shall include design, all materials, cost of preparing MS substrate surface over the civil structure, and complete installation — including curved or straight profiles which require thermoforming, along with necessary dies, templates, and specialized forming methods, wastages, all labour, scaffoldings, power, water, tools and tackles, transport, storage, lead and lift to the desired location etc., complete as required.

Sub Head : 02 - Interior Wall Finishes

Providing and fixing straight and/or curved paneling finished with Oak/Walnut/Teak/mMaple/Sapele Veneer, duly stained and finished in matt Polyurethane (PU), on a 12 mm thick, fire-retardant (Complying IS:5509) and waterproof plywood backing, supported on a concealed aluminum framework. The item includes aluminum frame work of Aluminum extruded section size 40 X 20 X 2 mm with 15 micron natural anodised finish to be securely fixed to the wall/floor/ceiling using appropriate fasteners and anchors using necessary GI brackets and SS 304 fasteners and screws @ 450 mm c/c horizontal and vertical as per specification and drawings. Veneer thickness shall be Minimum 0.6 mm thick, factory selected for consistent grain and color tone, pressed and bonded on calibrated 4mm BWP grade plywood with fire retardant using hot/cold press method with approved adhesive. Surface to be finished with matt PU coating, minimum three coats, sanded between coats for a smooth, durable finish. Plywood Backing shall be 12 mm thick BWP plywood confirming to IS 303 (Boiling Waterproof Grade – BWP) and treated for 2-hour fire-retardant rating. Plywood shall be ISI-marked and accompanied by fire retardancy and waterproof test certificates. All visible surfaces to be finished smooth and free from scratches, stains, or undulations.All exposed edges shall be veneered or lipped with matching veneer or solid wood strips.All corners to be rounded or beveled as per design intent to avoid sharp edges. Mock-up panel to be prepared for approval prior to full-scale implementation.Workmanship shall ensure uniformity in grain direction, seamless jointing, and consistent finish. The rate shall include all materials, cost of preparing appropriate substrate surface over the civil structure, and complete installation, wastages, all labour, scaffoldings, power, water, tools and tackles, transport, storage, lead and lift to the desired location etc., complete as required. All works to be executed as per the direction of the Engineer-in-Charge and in accordance with approved specifications and drawings. Adequate cut outs/push doors for electrical/MEP/IT/AS provisions to be provided wherever necessary with all ironmongeries, magnetic catchers.

Supply and installation of interior wall cladding using 10 mm thick Compact High Pressure Laminated (HPL) sheets of approved make, colour, and pattern, fixed over aluminum framing of approved extruded section at specified intervals, using necessary fixing accessories such as SS304 anchor fasteners, rivets, spacers, and sealants. The item includes aluminum frame work of Aluminum extruded section size 40 X 20 X 2 mm with 15 micron natural anodised finish to be securely fixed to the wall/floor/ceiling using appropriate fasteners and anchors using necessary GI brackets and SS 304 fasteners.@ 450 mm c/c horizontal and vertical as per specification and drawings. Material: High Pressure Laminate (HPL) of approved make — compact grade thickness 10 mm Shall conform to EN 438 and IS 2046 for high-pressure decorative laminates having anti-bacterial surface, Fire-retardant (Class B-s2, d0 as per EN 13501 or equivalent Indian standard). Impact, abrasion, and scratch resistance and UV-stabilized (for interior grade). Finish: Matte / Textured / Glossy (as specified). Material grade: Aluminum Alloy 6063 T6 or better, conforming to IS 733 and IS 1285. Fixing hardware: Stainless steel screws, nylon or EPDM washers, SS304 anchor fasteners (minimum 8 mm dia.), all rust-resistant. HPL sheets shall be fixed onto the aluminum framework using Secret fix system from behind the panel by suitable subframe assembly, maintaining uniform joint lines and level. Joint gap (3–5 mm) shall be maintained between panels and filled with neutral cure silicone sealant (UV- and fungus-resistant) of matching colour. The rate shall include all materials, cost of preparing appropriate substrate surface over the civil structure, and complete installation, wastages, all labour, scaffoldings, power, water, tools and tackles, transport, storage, lead and lift to the desired location etc., complete as required. All works to be executed as per the direction of the Engineer-in-Charge and in accordance with approved specifications and drawings. Adequate cut outs/push doors for electrical/MEP/IT/AS provisions to be provided wherever necessary with all ironmongeries, magnetic catchers.

Supply and installation of pre-fabricated Zinc-Titanium interlocking panel system for wall application, fabricated from natural or pre-weathered zinc-titanium alloy sheets, installed over a suitable waterproof and ventilated substrate system, complete with all required accessories, sub-structure, flashings, and fixings. The entire system shall be executed as per approved drawings and manufacturer’s guidelines. Material: Titanium Zinc alloy complying with EN 988 (Zinc and zinc alloys - Requirements for rolled flat products for building) having thickness 1.0 mm (±0.05 mm) pigmented (Quartz-Zinc, Anthra-Zinc, etc.) finish using Interlocking panels with concealed fixing system. Panels shall be fabricated with a longitudinal groove (female and male joint) and installed using concealed clips. Interlocking panels of 233 mm width and max 2000 mm length. Panels are formed with interlocking lap at panel edges and smooth, flat pan; designed to be field assembled in sequential installation by engaging edges of each panel to edge of adjacent panel. Panels are attached to supports/substrates using stainless screws located under edges of the panels The Panels Shall be Installed over the Aluminium box Section of 40 X 20 X 2mm thick @ 450 mm c/c horizontal and vertical with Screws/ Rivets of suitable size as recommended by manufacturer. Provide matching zinc or compatible metal flashings at all junctions, corners, and parapets. All joints to be weather-tight and aesthetically aligned. Perforation : Custom CNC punching as per approved drawings . Circular perforation of varying diameters shall be done as per approved drawings to meet the cladding intent Physical characteristics of pre-weathered zinc sheets:(I) Density: 7.2kg/dm3,(II) Thermal expansion coefficient: 0.022 mm/m x ºC ,(III) Melting point: 420 ºC,(IV) Re-crystallization point: 300 ºC,(V) Heat conductivity: 110 W/ (m.K),(VI) Electrical conductivity: 17Ms/m.All complete as per direction of Engineer In charge. Test certificate as per certificate of manufacturer. The rate shall include all materials, cost of preparing appropriate substrate surface over the civil structure, and complete installation, wastages, all labour, scaffoldings, power, water, tools and tackles, transport, storage, lead and lift to the desired location etc., complete as required. All works to be executed as per the direction of the Engineer-in-Charge and in accordance with approved specifications and drawings. Adequate cut outs/push doors for electrical/MEP/IT/AS provisions to be provided wherever necessary with all ironmongeries, magnetic catchers.