Keshod Airport - Facade and Roofing System Design Notes

Façade System Design

  • Introduction

    • Report covers the design basis for façade and roofing of the new domestic terminal building.
    • Member thicknesses/sizes are indicative and need re-validation by the EPC contractor during the detailed design stage.

  • Façade & Roofing System Design

    • The exterior envelope separates and shields occupants while allowing connection with the outside world.
    • Exterior conditions include:
      • Temperature.
      • Humidity.
      • Direct Sunlight.
      • Rain.
      • Wind.
      • Noise.
    • Façade should also satisfy:
      • Structural Integrity (Strength, Deflection, Earthquake & Natural Disasters).
      • Energy efficiency (In-operation, Life cycle, Carbon foot print).
      • Humidity.
      • Durability and Longevity of materials.
      • Human comfort (thermal, humidity, noise, natural lighting, glare, etc.) Direct Sunlight.
      • Initial capital and operation costs.
      • Thermal Breakage Resistant.
      • Design for safety.
      • Easy to Maintain.
      • Functional Flexibility.
      • Aesthetics.

Façade Design Concept

  • Façade design should consider Keshod's climatic conditions for GRIHA 5 Star rating.
  • Balanced Façade benefits:
    • Sufficient daylight.
    • Energy Efficiency.
    • Minimize Glare & Radiation.
    • Bringing Daylight to deeper areas.
  • Caution when selecting finishing items (ACP cladding, false ceiling, Glazing, GFRC etc.)
    • Consider Wind Zone/Location/Structural arrangement.
    • Ensure structural stability.
    • Shop drawings vetted by Facade consultant.
    • Ensured by Engineer-In-Charge with consultants/specialized agencies and executing agency in association with manufacturer.

Façade Design Performance Requirements

  • FAÇADE LIFE & DURABILITY

    • Façade system and material guaranteed for 15 years and expected structural stability for 25 years with appropriate maintenance as tested per technical specifications (hardware's, stainless steel fittings, Glass and Aluminium alloy along with field water test for water leakage).
    • The Works designed, fabricated and installed to achieve the specified performance levels throughout the design life under general exposure conditions as per BS 7543 appendix, subject to any special conditions in this specification.
    • Contractor to ensure compliance with requirements.

  • Expected life of products to be confirmed by:

    • Economic life in the environment.
    • Maintenance procedures.
    • Supplier/manufacturer assurance of product suitability.
    • Relevant product data.

  • Engineer-In-Charge has the right to rectify/replace deficient products at Contractor's expense to achieve expected life.

  • Contractor responsible for corrections due to unfit products/materials.

  • Materials exposed to sunlight (including through glass) must not degrade due to heat or UV radiation.

Performance Schedule

  • Structural Adequacy
    • Contractor to demonstrate structural adequacy against:
      • Wind loads
      • Dead loads
      • Live loads
      • Seismic loads
      • Snow loads
      • Maintenance related loads
      • Any other sources of load that may reasonably be anticipated
      • Building movements
      • Thermal movements
    • Evidence of adequacy can be:
      • Calculation
      • Test
      • Manufacturers test data
  • Structural Serviceability
    • Deflection limits on Façade elements shall not exceed (out of plane):
      • Structural steelworks: Span/300
      • Structural steelworks (cantilevered): Span/150
      • Aluminum frameworks (mullions and transoms supporting IGU): Span/250 or 15mm whichever is less
      • Aluminum frameworks (mullions and transoms) Other than IGU Glazing: Span/175 or 15mm whichever is less
      • Aluminum members: Span/175 (General framework cladding)
      • Glass: Span/60 or 15mm whichever is less
      • Aluminum cladding: Span/120 or 6mm whichever is less
      • Glass under gravity load: Span/60 and avoid water ponding
    • “span” is the shorter dimension or the cantilever of the element in question.
    • Evidence of serviceability can be demonstrated by:
      • Calculation
      • Test
  • Anchors
    • Per manufacturer’s details, submitted to Engineer-In-Charge for approval.
  • Embedment
    • Factor of Safety (FOS) for proprietary cast-in embedment’s to structural elements of the building shall be in accordance with the manufacturer details and submitted to the Engineer-In-Charge for notice.
    • Factor of Safety for custom made cast-in embedment’s to structural elements of the building shall be minimum of 3.0.
  • Waterproofing
    • Philosophy of waterproofing approach:
      • Pressure equalized with secondary drainage and ventilated spandrel for the unitized curtain wall system with water shed at each stack joint.
      • Prevent water leakage into the building interior from the outer face of the assembly, under the action of wind pressure kinetic energy, gravity, surface tension, or capillary action. Prevent water entering into those parts of the façade that would be adversely affected by the presence of water. Maintain water tightness under specified loads and movements.
  • Air Infiltration
    • All elements of Facade - Limited to 0.4 L/m²/s at 300Pa
  • Thermal Performance
    • Comply with ECBC-2017 (Energy Conservation Building Code)
  • Reflectivity and Shading
    • Laminated Insulated Glass Units for Curtain Walls/Glass Walls with low-e coating on surface #2, with matching appearance with proposed IGU. Color is a green substrate.
      • Shading Coefficient – to comply with the ECBC-2017 (Energy Conservation Building Code).
  • Acoustic Performance
    • Noise level at offices: NC40 and provision for cross talk attenuation to suit the notional partitioning layout. Based on open plan design.
    • Noise criteria reference values are the maximum noise level obtained with all plant operating on full or part load.
    • Noise spectra generated by building services plant should be smooth and free from discrete frequency peaks.
  • Movement Noise Control
    • Account for thermal and structural movements and wind/air movement effects.
    • Eliminate noises like creaking, rattling, and whistling.
  • Wind Noise Control
    • Avoid tonal noise from wind blowing through/over elements.
    • Structure-borne noise may transmit to the interior.
    • To limit vortex shedding, avoid:
      • Apertures and exposed elements with sharp edges and dimensions less than 80mm
      • Regular arrays of grillages, meshes, etc.
      • Small diameter wires or hollow sections with a diameter less than 50mm
      • Cavities which might be excited to organ pipe resonance when excited by vortices generated by other elements.
  • Electrical Continuity and Equipotential Bonding
    • Achieve electrical continuity, with electrical bonding locations tied to main electrical system.
      • Electrical connection between main earth grounding terminal and Exterior Cladding System mounting.
      • Metallic structural framework of the curtain wall is electrically continuous by itself.
      • Installation as per relevant National Standards covering electricity wiring.
      • Coordinate lightning protection systems and connection points, Engineer-In-Charge to review.
  • Ventilation Requirement
    • Not applicable.
  • Fire
    • Comply with local codes and building authorities regarding fire rating.
    • 2-hour FRP fire stop materials with smoke seal to separate adjacent floors and compartments, continuously sealed air-tight barrier between building structure and Facade.
    • Evidence of compliance:
      • Design information
      • Test certificates
      • By test
  • Building Regulations
    • Comply with all relevant statutory codes and regulations.
  • Building Movement
    • Aluminum Composite Panel and glass exterior enclosure systems must withstand movements including loading deflections, shrinkage, creep, and similar movements.
    • Design for simultaneous occurrence of all specified movements with no reductions applied to individual movements or to combinations of movements.
    • Building movement to be accommodated by interlocking aluminum components not through slippage of glass relative to framing members.
  • Attachment to the Building Structure
    • Fixings must resist dead loads, live loads, wind loads, vertical and lateral loads, and all building movements, individually and in combination.
    • Hot-dip galvanized mild steel cast-in channels or cast-in plates with weld-on studs and anchor plates used as cast in anchors where behind the vapor barrier.
    • Stainless steel Grade 316 counterpart adopted where beyond the vapor barrier.
    • Stainless steel Grade 316 masonry anchors used only where cast in anchors have been erroneously omitted and only with approval of the Engineer-In-Charge. Proprietary products with a track record of less than 10 years unacceptable.
    • Inspect all site welding prior to post-painting which matches with existing finishes of the steel members.
  • Vibration Proofing of Fixings
    • Design all fixings to prevent loosening due to vibrations or cyclic effects of load, deflections, and thermal expansion.
    • Achieve this using locking nuts, locking washers, approved locking fluid, or tie wires.
  • Locked-in Stresses
    • Avoid designing and detailing fixings that introduce locked-in stresses detrimental to the façade's performance over its service life.
    • Avoid rigidity in unitized/semi-unitized panels that restricts thermal or other movements.
    • Ensure slots for movements are not filled.
  • Fixings
    • All fixings shall be concealed and shall not be visible.
  • Final Tolerances
    • The Works must comply with the requirements set out in the Specification.

Wind Load Calculations (For facade System)

  • Wind loading as per IS 875 (Part–3):2015.
  • Basic wind pressure (P_z) determined by:
    • Pz = 0.6 * (Vz)^2 N/m^2
    • Where V_z is the design wind speed at height z in m/s
  • Vz = (Vb * k1 * k2 * k3 * k4)
    • Where:
      • V_b = Basic wind speed m/sec
      • k_1 = Risk Coefficient factor
      • k_2 = Terrain, height and structure size factor
      • k_3 = Topography factor
      • k_4 = Importance factor for cyclonic region
  • Design wind pressure (P_d) determined by:
    • Pd = Kd * Ka * Kc * P_z
    • Where:
      • K_d = Wind directionality factor
      • K_a = Area averaging factor
      • K_c = Combination factor
  • External coefficient and other parameters as per IS 875 (part 3):2015.
  • EPC contractor shall submit façade design basis and latest codes as per IS 875-Part-3 for approval.

Wind load on components

  • Wind load F = (C{pe} – C{pi}) * Effective Frontal Area at height z * p_z
    • C_{pe} = External pressure coefficient
    • C_{pi} = Internal pressure coefficient
    • p_z = design wind
  • External pressure coefficient C_{pe} for wall:
    • Building plan ratio
      • Wind angle
      • Wind ward (A) Leeward (B) C D
      • Local CPe
      • Internal pressure coefficient C_{pi} = +/0.2
  • Vertical wall cladding = pz (C{pe}-C_{pi})
  • Wind load calculation of Keshod Airport as per IS 875-PART 3 2015 carried out by EPC after award of work.
  • Design of all structures/facades to be carried out by the structural consultant of EPC and vetted by NIT/IIT before execution.

Dead and Live Loads

  • Live Loads (Imposed loads)
    • Comply with Indian Standard: Code of Practice for Design Loads (Other than Earthquake) for Buildings and Structures, Part 2 Imposed Loads.
    • Usage Area Intensity of Horizontal Load, KN/m Run
      • Light access stairs, gangways and the like not more than 600mm wide 0.25
      • Light access stairs, gangways and the like more than 600mm wide; stairways, landings, balconies and parapet walls (private and part of dwellings) 0.35
      • All other stairways, landings and balconies, and all parapets and handrails to roofs except those subject to overcrowding covered under (iv) 0.75
      • Parapets and balustrades in place of assembly, such as theatres, cinemas, churches, schools, places of entertainment, sports, buildings likely to be over- crowded 2.25
  • Dead Loads
    • Comply with the Design Loads for Buildings and Structures IS: 875 (Part 1).
    • Material Self Weight (kN/m3)
      • Steel work 78.5
      • Aluminium 27.1
      • Glass 25.6
  • Seismic Loads
    • As per IS 1893-2016, the structure is located in Zone III of the seismic map of India.
  • Cleaning Loads
    • The façade shall sustain a static load of 500N applied perpendicularly to the façade surface and framing through a square of 100mm side without damage.
    • Horizontal Aluminium clad features must withstand a uniformly distributed load of 0.75kN/m², or 1.0kN concentrated load over any square with a 300mm side, acting perpendicularly to the surface of the Aluminium cladding.
  • Thermal Loads
    • Resist cracking to glass, stone, and ceramic materials caused by thermal stress within the design operating conditions range.
    • Consider perimeter heating trench, hot air curtains, and surfaces behind glass.
  • Internal Load on Insulating Glass Units
    • Design units to resist the combined effects of temperature, altitude, atmospheric pressure, together with the other specified loads.
  • Impact Loads
    • Comply with the Design Loads for Buildings and Structures IS: 875 (Part 2).
    • Maximum visually acceptable dent in the metal surface is 10mm in diameter and 3mm in depth.
  • Other Loads
    • Cater for construction stage loads.
      • Consider and accommodate loading conditions associated with construction and serviceability of completed Works.
  • Internal Trim Stability
    • Interior trims, including stools and sill boards, shall not deflect more than 2mm when subjected to a concentrated force of 150N at any point without permanent deformation.
    • Minimum thickness: 2mm, subject to Engineer-In-Charge approval on painted samples.
  • Temporary Construction Load
    • Sustain and safely transmit any temporary loading from lifting, storing, transporting, hoisting and installing cladding or other works.
  • Accommodation of movement generally
    * The Works shall accommodate the movements without any reduction in the performance below the required levels.
    * Deflections due to design imposed loads.
    * Deflections under repeated cycles of the design wind loads.
    * Changes in dimension and shape from building movements (settlement, shrinkage, elastic shortening, floor beam deflections, creep, wind sway, seismic activities, thermal and moisture movement).
    * Movement of any joint in the supporting structure/building frame.
    * Contractor to provide estimates of nominal, minimum and maximum joint widths accounting for tolerances and movements at all movement joints.
  • Accommodation of building movement
    • Allowance shall be made for horizontal and vertical deflection of the structure due to differential settlement, wind effects, deflection of beams, and long-term concrete creep.
    • System designs consider element deflection during the building's life cycle related to live load and concrete creep.
      • Design should consider worst possible combination of effects to prevent internal stress, failure, deterioration, or failure of weather seals.
    • Vertical differential joint design must take into account thermal expansion, installation tolerances, fabrication tolerances, concrete placement tolerances, and lateral sway of the structure (± 60mm for main roof truss).
    • Contractor shall design, supply, and install cladding and curtain wall system to withstand expansion and contraction forces resulting from temperature without buckling, glass or joint seal failure, undue stress on structural elements/fasteners, or other detrimental effects.
  • Climatic Data
    • Contractor shall design, supply, install, and warrant the works per reasonable climatic conditions for the region.

Internal and External Environment

  • Designed and installed to comply with relevant existing External conditions like Design outdoor dry bulb temperature and Coincident wet bulb temperature for Keshod Airport. The peak external design conditions must be followed.
  • The internal design conditions for each area shall be in accordance with the design parameters:
    Air conditioned spaces: Hall, Concourse, Busgates, Lounge, Retails / Office, Circulation area = 24±2 °C DB, 60% RH. IT room, Data centre = 20±1 °C DB, 60% RH, 50±10% RH respectively.
  • Thermal component of joint movement shall be based upon a minimum material temperature increase of 50°C and decrease of 50°C relative to the time of installation.
  • Construction Tolerances
    • Structural members shall be set out from reference grids/datum levels and constructed such that the dimension between any two points agrees with required dimensions.
      • Horizontal position of exterior edge beams/columns/concrete slabs: +25mm (outward); -25mm (inward).
      • Vertical position of slab/edge beam/concrete upstand/downstand: ±25mm
      • Deviation in plan for column location: ±30mm
      • Horizontal position of steel beams and columns: ±15mm.
      • Fixing brackets to connect facade elements to the cast-in embedments shall be designed to cater for these construction tolerance.

INDEPENDENT CHECKING OF FAÇADE SYSTEM:

  • AAI will engage an independent facade consultant (IFC) with experience on Airport facades design and construction.
  • Structural Design:
    • Facade interface details like end closures, roof interfaces, skylight interfaces to be finalized and recommended by the independent façade consultant (IFC) during the design stage.
      • Flashings, vents and weep holes to be provided to maintain pressure equalization principles and to prevent collection or ponding of water in cavities.
      • The effects of differential movement to be considered as the development of details.
      • All glazing terminations/interfaces to be sealed with appropriate flashing (internal and external) and weather sealant.
  • Glazing works:
    • Structural design of aluminum extrusions to comply with requirements of IS: 8147.
    • Sufficient wall thickness for extrusion to avoid warping and twisting of profiles.
    • Setting blocks to be placed at correct position & follow good practice of glazing.
    • All materials to comply with respective quality standards.
  • Allowance for movement joints- Steel/Concrete to facade:
    • Following are the building movements that any type of façade system and associated works shall accommodate:
      • Temperature movement.
      • Vertical / floor movement.
      • Concrete shrinkage and creep.
      • Main steel structural deflection for longer span.
      • Seismic movement as applicable.
  • Design Calculations
    • Supporting design calculations, shop drawings, samples and material should be recommended by Independent Façade Consultant (IFC).
  • EPC contractor shall provide all assistance to IFC engaged by AAI.

MATERIAL REQUIREMENTS

  • Metals & accessories Component Material & Grade
    Aluminium Extrusion Grades 6063-T5, 6063-T6, 6060-T66 Min. wall thickness for structural & Non-strucutral
    Aluminium Brackets Grades 6061-T6 or approved equivalent.
    Sheet, strip and plate Sheet Grade: 3003 or 5005/5052 , for hidden locations & Exposed locations
    Aluminium Coating Super Durable Exterior Grade Powder Coating, PVDF Coating
    Steel Finish,Hot Dip Galvanizing, Low VOC Anti-corrosive protective Coating
    Anchor Bolts Stainless steel 316
    Screws & Bolts Stainless steel grade 316
    Sealants Non-Staining Silicone Sealant
    Setting Block Shore A durometer hardness: 85 +/- 5
    Fire & Smoke Seal, Mineral wool fiber insulation-min Density 64 kg/m3,continuous at bracket locations.
    Stainless steel Elements Grade 316– matt finished
  • Contractor shall submit technical data and material samples with the recommendation of Independent Façade Consultant (IFC).
  • Glass:
    • Use safety laminated glass wherever human impact, overhead glazing applications & Inclined Glazing Applications. Single glass in any form is not a safety glass.
    • All skylight glasses & inclined façade glasses must be laminated only, using Heat Strengthened Glass at bottom and Toughened lite at the top.
    • All toughened glass to be heat soaked, evidence of heat soaking records to be submitted by the supplier.
    • Wherever possible use Heat Strengthened glass instead of Toughened glass.
    • The surface compressive stress is between 38.8 N/mm² and 52 N/mm² & in the Tempered glass is between 69 N/mm² and 120 N/mm² when measured by GASP.
    • Refer “Guidelines on use of glass in buildings – human safety” by referring to CCPS website www.ccpsindia.com. For selection of glass to be used on Apron & city side façade, BCAS requirements shall be strictly adhered.
    • Select glass that has optical properties similar to other manufacturers’ products.
  • Fabrication requirements:
    • All frame fabrication, assembly & glazing work should be done at factory. Site fabrication, assembly works are not permitted.
    • Make sure primary and secondary seals are continuous.
    • Moisture sensitive coatings to be fully removed or edge deleted where the sealant is in contact with the glass so that sealant can bond directly with glass.
    • Use durable glass coatings and colors with minimum guaranteed life of 20 years.
    • Coat vulnerable surfaces during handling and installation.
  • Fabrication Inspections:
    • Curtain wall - Check for overall compliance, tolerances and finishes of Aluminium framing fabrication and assembly
    • Façade Steel Works - Check for fabrication workmanship, overall compliance, tolerances and finishes.
    • Material Finishes - Aluminium and steel finishing, quality control.
    • Stainless steel - Check for fabrication, welding workmanship, overall compliance, tolerances and finishes.

TESTING

  • Site tests:
    • Facade Items to be Tested Type of Tests Frequency & Samples
      Post Fixed Anchors/Cast in Plates Pull out test for Proof load factor of 1.5 on Service load anchors Min 10% of Installed Anchors shall be tested.
      Site Weld Test Visual Check, Die penetration test, Magnetic particle test, Ultrasonic Examination: Approvals upon mockup, 25% of connections should be covered periodically.
      Typical and Non-Typical Curtain wall & Interfaces Site Water testing- Testing method to be as per AAMA standard First test for Typical façades to be tested for field water test upon completion of 1000 sqm façade area or 10% of glazing area whichever is less. Subsequent testing shall be progressive with one test for every 3000 Sqm of façade are or part thereof, not less than 100 sqm per test
  • Laboratory Tests:
    Aluminium Extrusion Chemical Test Mechanical Test: 3 samples per test per 5000 Sqm of façade
    Gasket Shore Hardness Chemical Test, one sample per type of gasket.
    Glass Fittings & Hardware: Mechanical Properties Chemical Properties Test certificate / MTC within last one year is acceptable
    Glass Glass Performance- Photometric Properties 2 Samples of Each type, 2 samples for minimum 2000 Sqm area of façade and one sample for every subsequent 2000 Sqm of façade area.
  • Performance tests:
    • for air leakage
      as per ASTM E-283-04 testing method for a range of testing limit 1 to 200 mVhr (-50 Pa to – 300 Pa) & (+50 Pa to +300 Pa)
    • Static water penetration Test as per ASTME- 331- 09 testing method for a range up to 2000 ml. (50 Pa to 1500 Pa)
    • Dynamic Water Penetration as per AAMA 501.01- 05 testing method for a range upto 2000 ml (50 Pa to 1500 Pa)
    • Structural Performance: Deflection and deformation by static air pressure test (1.5 times design wind pressure without any failure) as per ASTME-330-10 testing method for a range upto 50 mm
    • Seismic Movement Test (upto 30 mm) as per AAMA 501.4- 09 testing
    • Onsite Test for Water Leakage for a pressure range 50 KPa to 240 KPa (35psi) upto 2000 ml.
    • Performance Testing of Structural glazing system Tests to be conducted in the NABL accredited lab or by any other accreditation body which operates in accordance with ISO / IEC 17011 and accredits labs as per ISO/ IEC 17025.
  • Cleaning and Maintenance access:
    • Facade consultant shall take into account that all façade areas are accessible and provide appropriate access for cleaning & maintenance from inside and outside.
    • Glass handling for replacement at any locations to be demonstrated.
  • Compliance requirements:
    • Before releasing payment for the items of structural/curtain glazing and Façade items, ensure that the inspection & issue of compliance certificate by the Independent Façade Consultant (IFC) for the work done up to that stage.

TERMINAL BUILDING

  • Minimum thicknesses for items specified herein.
  • Semi-unitized Structural Glazing on Landside, Airside & other sides Elevation of terminal building, Fixed Link Bridge Glazing:
    • 35.52 mm thk (minimum Thickness) Laminated Insulated High-Performance Heat Strengthened Glass with Performance coating on glass surface # 4 (Clear Substrate (Blue Shade)/ Blue Substrate as per Design Intent).
    • 17.52mm thk (minimum Thickness) SentryGlas Interlayer Laminated Glass (Fixed Glass).
    • 13.52mm thk (minimum Thickness) SentryGlas Interlayer Laminated Glass (Door Glass).
      • The thickness tolerance of each individual glass should be less than or equal to ±0.3 mm.
  • The EPC Contractor shall design and develop systems which meets the design parameters & architectural intent.
  • Refer standard thermal and IS/ASTM specifications for quality specifications.

Façade System Selection Criteria

  • Air Infiltration: A complete air seal is required, with no excessive air leakage or noise from wind movements.

  • Thermal Performance: Appropriate insulation levels are needed to prevent excessive heat transfer, with vapor barriers to prevent interstitial condensation. Drainage shall be provided for any condensation within cavities.

  • Acoustic performance: Minimize noise due to relative movement between façade and structure. Address noise from thermal expansion, contraction, and structure deflection. Provide sufficient attenuation of the external acoustic environment, inaudible drumming, rattling, whistling etc.

  • Glass Selection Criteria:
    * Thermal Comfort: Reduce unwanted heat loss and heat gain.
    * Visual Comfort: Optimize daylight, Visual Light Transmission, minimize glare.

  • High Performance Glass:
    * Reduces heat ingress, allows daylight penetration
    * Low U-value, low SHGC & High VLT.
    * Leads to energy savings and enhances occupant comfort.

  • Selection of Glass to meet the GRIHA Requirement:
    * High Performance Glass - Energy Efficient Glass:
    SHGC of 0.25 (max) and Low U-Value of 1.5 W/sqm-K (max).
    Provides HVAC energy savings and helps procure Green rating.

  • Glass Module - To be as per Architectural Intent with suitable
    adjustment modules at ends.

  • Replacement of Glass:
    Site deglaze and re-glaze glass without extra cost if any breakage after installation.

FAÇADE FINISHES SCHEDULE

  • Passenger Terminal Building / ATC Tower cum Technical Block:
    Semi-Unitized Structural Glazing System , igh Performance Glass: GL-01 and Entrance Vestibule ACP Panel Cladding Entrance Portal- Arrival/Departure Lvl.
    WT-03, ACP and SS Cladding Cornice/Columns , Aluminium Composite Panel ( Fire Retardant Grade .and Entrance Portal D1-Double Leaf Doors.

SEMI UNITIZED STRUCTURAL GLAZING SYSTEM @ PASSENGER TERMINAL BUILDING

  • complete design & engineering, supply and install including testing of materials and performance, fabrication, quality control,Transport, storage, protection, final clean and handover, guaranties, and maintenance up to the defects liability period
    System comprises of Semi-Unitized extruded Aluminium curtain wall panels, quality as per grade 6063-T6 finished with Super Durable Powder coat finish. The system must design and pass the proof test at 1.5 times design wind pressure.The framing members provide no structural support for the building provides natural light into the building. The glass to be structurally bonded to the mullion and transom. The system shall accommodate DGU in vision/Spandrel areas

  • All concealed Aluminium surfaces any extruded Aluminium cleats shall be pre-treated with CHROME-FREE conversion layer coating
    Design Life and Durability: The Works shall be appropriate & adequate for its intended purpose.The expected life of products used in the Facade and Structural: Provide systems that have been tested in accordance with ASTM E330

  • Materials & Finishes: ExtrusionsSurface Preparation& Super Durable Polyester Powder Coating,All Exposed
    Elastomeric Gaskets -E.P.D.M. Gaskets,& Setting Blocks for Glazing
    Screws & Fasteners: Supplying, drilling /cleaning hole etc, Aluminum Extruded Brackets: Brackets shall be of Aluminum of grade 6061-T6 or as approved by Engineer-In-Charge,j)Fire stop & Smoke Seal with Spandrel Insulation & Shadow Box Smoke Seal Interjunction Area,

  • Silicone Bite /Secondary Seal Calculations
    Flashing & Trim:3 mm Thk. Aluminium& Super Durable powder coating

  • The following performance test are to be conducted on structural glazing system from the certified laboratories accreditated by NABL
    Curtain wall Specifications for Weather sealing & Structural Sealants:

Aluminum Properties

The powder coating on the Aluminium of the building, to be used, shall be minimum 60 microns Super Durable Polyester powder coatings& All exposed extruded Aluminium profiles & concealed Aluminium profiles shall be finished with CHROME FREE Pre- treatment Coating; Materials: Elastomeric Gaskets;EPDM Silicon Sealant Compatibility (Peroxide cured) setting block shall be compatible with silicone sealant

  • The design calculations for secondary seal depth to be used in Insulating Glass Unit & Structural Bite to be used for Glazing should be verified by the sealant manufacturer, all weather Seal details must be reviewed by the sealant manufacturer before any project approval or acceptance is givenAll test results confirming adhesion and compatibility are mandatory for all sealants used in the project& Quality Assurance for Structural Glazing-Deglazing report should be completed after each test and this should be submitted as part of the warranty application & Site Quality Assurance for substrates

  • use sealants from one manufacturerand that all sealants are compatible with each other in the proposed system. & Sealant Selection Use only the specific product recommended by the manufacturer for eachapplication-Install materials in accordance with the manufacturer’s printed instructions cure sealants in accordance with the manufacturer’s instructions & Submit written Guarantee agreeing to repair or replace defective materials and workmanshipA ten year warranty is required from the sealant manufacturer on completion of the project.& GENERAL warranty and special warranty
    Particular Specification for Vision/Spandrel Glass Panels: Insulated Glass Panel of sizes section details & Test and Installation for High Performance Glassand the Double glass Units / Insulated Glass Units (DGU / IGU) are to confirm following 9.10.7 SPACER TUBE & 9.10.8 STRUCTURAL /SENTRYGLAS INTERLAYER
    GL-01: Technical Data: & Quality Assurance of Glass; HANDLING & STORAGE ,Replacement of Glass& Testing, & Cleaning and maintenance access Expansion Joint Detailto be considered for Façade as per Tender Drawing ; Anticorrosive Protective Paint System for Exposed Steel Works
    Double door with side and upper panels of specified size- is with 10WT-02: ENTRANCE VESTIBULE GLAZING + ENTRANCE PORTAL ACP CLADDING @ ARRIVAL/DEPARTURE LVL Automatic Sliding doors with Aluminium Profiles for side Fixed Panels:
    Double door with fan light and side panels consists of the following: with Patch Fitting, Floors lockFloor Spring,Back to Back SS Pull HandleD:", 13.0, WT-04: ALUMINIUM COMPOSITE PANEL ( FIRE RETARDANT GRADE- A2,S1,D0 COLUMN CLADDING @ PASSENGER TERMINAL BUILDING. Scope: Aluminium composite panel cladding in tray form with anodized Aluminium as framing material+ 0.5mm aluminum skin of 5005 Alloy with service coat bond with co extrusion/Lamination process

ROOFING SYSTEM

  • General Description-Designing providing and fixing 65/400
    SINGLE skin 0.90 MM THICK AA 3004 aluminum ALLOY, CONCEALED FIX ALLUMINIUM ; Loading criteria shall be as per IS 875 KPa Part III+ ,top Layers- Aluminum Profile Standing Seam straight profile sheets with RAL color,Seond later Rockwool/Stone wool insulation,Third layer: Vapour control layer made scrim reinforced Polyethlene film, & Fourth layer Top Hats galvanized steel Top hats to be installed with Liner sheet& Fasteners,Wind Uplift Test Rreport
    & All Testing and Quality assurance is required & is a priority and this is specified herein as a code requirement
    In