Sliding, casement, folding and curtain wall aluminium door and window systems in 6063-T5 architectural alloy. ECBC compliant. For high-rise towers, airports, hospitals, shopping malls, SEZ developments and institutional projects. Pan India supply.
Get a QuoteRailings India manufactures aluminium door and window systems in 6063-T5 architectural-grade alloy for large-scale commercial, institutional and infrastructure projects. All systems are available in single and double glazed configurations with ECBC-compliant options for energy-efficient buildings. Powder coat and anodised finishes in any RAL colour.
2, 3 and 4-track sliding door systems for balconies, terraces, commercial entrances and partition walls. View Sliding Doors
Side-hung, top-hung and tilt-turn casement window systems for commercial and residential buildings. View Casement Windows
2, 3 and 4-track sliding window systems. The most widely specified window type for high-rise residential towers and commercial offices. View Sliding Windows
Bi-fold and multi-fold door systems for hospitality, retail and commercial projects requiring large, unobstructed openings. View Folding Doors
Full-height glazed shop front systems for retail units, banks, showrooms and commercial fit-outs. View Shop Fronts
Stick-built and unitised aluminium curtain wall systems for commercial high-rise buildings and institutional facades. View Curtain Wall
Aluminium alloy 6063-T5 is the international standard for architectural aluminium extrusions. It provides the optimal combination of extrudability, surface finish quality and structural performance for door and window applications. The T5 temper designation indicates artificial ageing after extrusion — producing a harder, more dimensionally stable profile than T1 or untempered alloys.
Sliding windows and balcony sliding doors for G+7 and above residential towers. RERA compliant. Weather-sealed and wind-load tested configurations for upper floor applications.
Aluminium doors and curtain wall systems for airport terminal buildings, hospital blocks, IIT campus facilities and government secretariats. ECBC-compliant double-glazed units available.
Aluminium shop fronts, frameless doors and curtain wall systems for mall anchor stores, retail units and commercial fit-outs across India.
Curtain wall and window systems for SEZ commercial blocks and IT park campus buildings. Colour-matched to project facade specification.
The correct door and window specification depends on the opening size, the ventilation requirement and the building's energy strategy. Sliding windows suit standard residential and office openings where the sash slides within the frame footprint. Casement windows give the best air-tightness and ventilation control and are preferred for hospitals and ECBC-regulated buildings. Folding doors open an entire wall for hospitality and retail. Shop fronts and curtain wall handle full-height glazed facades. The guide below maps system type to typical application.
| System | Best Opening Type | Typical Application |
|---|---|---|
| Sliding window | Standard punched openings | Residential towers, offices, hospitals |
| Casement window | Ventilation-critical rooms | Hospitals, institutions, ECBC buildings |
| Sliding door | Balcony and terrace access | Apartments, hotels, commercial entrances |
| Folding door | Wide unobstructed openings | Restaurants, banquet halls, retail |
| Shop front | Full-height retail glazing | Malls, banks, showrooms |
| Curtain wall | Full building facade | High-rise commercial, airports |
All aluminium systems are available in three finish families. Powder coating is the most widely specified — a polyester coating applied electrostatically and oven-cured, available in any RAL colour and the standard finish for commercial and residential projects. Anodising is an electrochemical finish in natural silver, bronze, champagne or black, preferred where a metallic architectural appearance is required and for coastal projects needing maximum corrosion resistance. PVDF (Kynar) coating is specified for premium high-rise facades and curtain wall where the longest colour retention and weathering performance is required, typically carrying a 15 to 20 year warranty. Finish selection is colour-matched across windows, doors and curtain wall so the entire facade reads consistently.
For air-conditioned buildings governed by the Energy Conservation Building Code (ECBC), single glazing is insufficient. Railings India supplies double glazed units with a sealed air or argon cavity that reduce solar heat gain and lower the building's cooling load. High-performance options include low-emissivity (Low-E) coated glass that reflects infrared heat while admitting daylight, and solar-control tinted glass for west and south facades exposed to direct sun. The correct glazing specification is selected against the project's ECBC compliance target and the local climate zone, from the hot-dry zones of central India to the warm-humid coastal belt.
Railings India, part of Sun Corporation India, manufactures 6063-T5 aluminium door, window and curtain wall systems from Hyderabad for developers, PMC consultants and EPC contractors. Reference supply includes SEZ IT Park (Bengaluru) — 12,000 sqft curtain wall across 3 towers — and Microsoft Campus corporate glazing packages, with ECBC performance data, IS 875 wind calculations and NBC 2016 compliance statements supplied as standard on commercial orders.
Reference specification matrix for PMC technical submittals, green building certification and EPC tender BOQs. Fenestration performance values align to NBC 2016 Part 4 and ECBC 2017 unless noted. Structural design references IS 875 Part 3 for wind load by zone.
| Application | NBC / code | U-value target (W/m²K) | SHGC target | Glazing spec | Frame | Standard |
|---|---|---|---|---|---|---|
| SEZ / IT park office facade | Commercial | ≤ 3.3 | ≤ 0.25 | DGU low-e argon fill | 6063-T5 thermal break | ECBC 2017 + IS 875 |
| Hospital ward / ICU window | Institutional | ≤ 3.3 | ≤ 0.25 | DGU casement / sliding | 6063-T5 | NBC + ECBC |
| High-rise tower residential window | Residential high-rise | ≤ 3.3 | ≤ 0.25 | DGU weather-sealed | 6063-T5 | IS 875 Part 3 wind |
| Airport terminal curtain wall | Assembly / commercial | ≤ 3.3 | ≤ 0.25 | DGU SGP / laminated | 6061-T6 mullion | ECBC 2017 + IS 875 Zone IV/V |
| Retail shop front | Commercial | N/A | N/A | Toughened / laminated | 6063-T5 | NBC Ch. 4 |
| Coastal facade (Chennai / Mumbai) | Commercial | ≤ 3.3 | ≤ 0.25 | DGU low-e | 6063-T5 marine anodise | IS 875 Zone III/IV |
| Balcony sliding door — tower | Residential | N/A | N/A | 2–4 track weather-sealed | 6063-T5 | IS 875 wind tested |
| Finish | Best application | Coastal suitability | Typical warranty |
|---|---|---|---|
| Powder coat (RAL) | Offices, hospitals, towers | Inland — good | 10–15 years |
| Anodised (Class 25) | Coastal commercial | Excellent | 20+ years |
| PVDF (Kynar) | Premium curtain wall | Excellent | 15–20 years |
| Thermal break + powder coat | ECBC high-WWR facades | Good with sealed DGU | Per project spec |
Decision reference for architects, PMC teams and EPC contractors selecting fenestration systems by building type. See also Aluminium vs uPVC comparison guide.
| Factor | Sliding window | Casement window | Sliding door | Curtain wall |
|---|---|---|---|---|
| Typical application | Towers, offices | Hospitals, ECBC buildings | Balcony access | Full facade G+8–G+40 |
| ECBC relevance | DGU required | Best air-tightness | Weather seal critical | Primary ECBC driver |
| Wind load driver | IS 875 Part 3 | IS 875 Part 3 | IS 875 Part 3 | IS 875 + deflection limits |
| Documentation intensity | Medium | Medium | Medium | Highest (ECBC + wind) |
| Sector guide | High-rise | Healthcare | High-rise | IT parks |
Documents Railings India supplies for aluminium fenestration PMC and green building submittal packages. Request via project enquiry.
| # | Document | Format | PMC / authority use |
|---|---|---|---|
| 1 | IS 875 Part 3 wind load calculation (zone-specific) | PDF + calc sheet | Structural design basis |
| 2 | ECBC performance data — U-value, SHGC, VT | Green building / ECBC submittal | |
| 3 | NBC 2016 compliance statement (fenestration) | Authority submittal | |
| 4 | AutoCAD shop drawings (elevation, section, fixing) | DWG + PDF | Design freeze / GFC |
| 5 | Aluminium MTC — IS 617 grade 6063-T5 / 6061-T6 | PDF per batch | Material approval |
| 6 | Glass MTC — IS 2553 toughened / DGU assembly | PDF per batch | Material approval |
| 7 | Installation method statement | Site safety plan | |
| 8 | Water penetration / air infiltration test report | Facade performance approval | |
| 9 | Third-party inspection coordination letter | PMC QA protocol | |
| 10 | O&M manual — hardware service, seal replacement | Handover dossier |
PMC pre-submittal checklist: □ ECBC U-value / SHGC on schedule □ IS 875 Part 3 wind zone confirmed □ Thermal break specified where WWR > 40% □ Finish spec (powder / anodise / PVDF) □ Shop drawings stamped pre-GFC □ DGU low-e coating confirmed □ Coastal anodising Class 25 where applicable
| Stage | EPC action | Railings India deliverable | Duration | Approval gate |
|---|---|---|---|---|
| 1. Enquiry | Share facade GA, window schedule, ECBC target | Budgetary spec + ECBC matrix | 2–3 days | PMC technical review |
| 2. Technical submittal | Issue LOI / draft PO | Full document pack (items 1–7) | 5–7 days | PMC + developer |
| 3. Shop drawing approval | Comment fixings, mullion centres, sill details | Revised stamped drawings | 7–10 days | PMC design freeze |
| 4. GFC release | Confirm quantities per tower / floor | Final BOQ + production release | 2 days | EPC procurement |
| 5. Fabrication | — | Hyderabad factory QA + batch MTCs | 4–8 weeks | EPC factory inspection (optional) |
| 6. Mock-up (if required) | Install sample window / curtain wall panel | Panel + performance test report | 1–2 weeks | Architect + PMC sign-off |
| 7. Dispatch & installation | Floor-wise delivery programme | Packed frames + install guide | Per programme | Site logistics plan |
| 8. Handover | Submit as-built + dossier | O&M manual + ECBC compliance pack | 3–5 days | PMC / green building close-out |
Project references drawn from Railings India portfolio published on case studies and projects. No additional project names introduced.
| Project / zone | Sector | Scope | Key specification | Documentation |
|---|---|---|---|---|
| SEZ IT Park (Bengaluru) | Corporate / SEZ | Aluminium curtain wall — 3 towers | 12,000 sqft, ECBC DGU | ECBC + IS 875 + shop drawings |
| Microsoft Campus | Corporate campus | Aluminium glazing packages | Hyderabad — windows + facade | Full PMC submittal pack |
| G+40 Residential Tower (Hyderabad) | High-rise residential | Aluminium sliding doors + windows | IS 875 wind tested, 40 floors | Developer tower package |
| Airport terminal facade zones | Aviation | Curtain wall + DGU systems | IS 875 Zone IV/V | AAI-compatible submittal |
Outcome — SEZ IT Park (Bengaluru): 12,000 sqft aluminium curtain wall across 3 towers — ECBC DGU documentation supplied for green building certification.
IT park case study → · IT park sector guide → · High-rise sector guide → · Manufacturer credentials →
Submit your project details and our technical team responds within 24 hours with system recommendations and pricing.
Request a QuoteThe Energy Conservation Building Code (ECBC 2017) is mandatory for commercial buildings above 500 sqm of conditioned area in India. The key window performance metrics under ECBC are U-value (overall thermal transmittance, W/m²K) and SHGC (Solar Heat Gain Coefficient, dimensionless 0–1). Both must meet climate-zone-specific limits — which are more stringent in composite and hot-dry zones (most of peninsular India) than in temperate zones.
For most commercial buildings in Hyderabad, Bengaluru, Chennai, Mumbai and Delhi (Climate Zones 1–3), the ECBC target is a maximum U-value of 3.3 W/m²K and SHGC of 0.25 for WWR (window-to-wall ratio) above 40%. These targets cannot be achieved with single glazing — DGU with low-emissivity (low-e) coating is required. Our 6063-T5 aluminium window systems are supplied with compliant DGU specifications and ECBC performance documentation for all commercial orders.
The frame thermal break is a separate consideration. Standard aluminium frames without thermal breaks have U-values of 5–6 W/m²K at the frame — significantly above ECBC limits for high-WWR facades. For projects with strict ECBC compliance requirements on facade performance, we supply thermally broken aluminium profiles that reduce frame U-value to 2.5–3.5 W/m²K. Specify the requirement at enquiry stage — thermally broken profiles require a different extrusion tooling and lead time.
6063-T5 is the standard architectural aluminium alloy for extruded window and door profiles. The T5 temper (artificially aged after extrusion) gives a minimum tensile strength of 145 MPa and yield strength of 110 MPa — adequate for standard window spans. For curtain wall mullions carrying significant wind loads, we move to 6061-T6 where the structural calculation requires it. All aluminium supplied by Railings India is tested to IS 617 (aluminium alloy ingots and castings) with material test certificates available for all commercial orders.
Specification guides, cost references and compliance notes for aluminium door and window projects.
