Bangladesh Fire Rated Glass Certified for BNBC 2020 and Local Compliance

Bangladesh's construction sector, particularly in rapidly urbanizing centers like Dhaka and Chittagong, operates under the stringent requirements of the Bangladesh National Building Code (BNBC) 2020. For high-occupancy buildings, exit enclosures, and fire compartments, the code mandates specific fire-resistance ratings that align with international best practices. Antifires provides fire rated glass systems certified to meet these localized compliance demands, ensuring that architects and contractors can achieve BNBC 2020 approval without compromising on design or safety.

The BNBC 2020 references performance criteria that are technically equivalent to standards such as BS 476 Part 22: 1987 and BS EN 1634-1: 2008. These standards define critical parameters for integrity (E) and insulation (I), which are essential for preventing fire spread and protecting evacuation routes. Antifires’ product range, from 60-minute integrity-only systems to 120-minute combined integrity and insulation assemblies, is tested under these rigorous protocols. The official BNBC 2020 documentation provides the legal framework, while Antifires supplies the verified hardware to fulfill those specifications.

For projects in Bangladesh’s cyclone-prone coastal regions or high-humidity industrial zones, the thermal performance of glazing systems is critical. Antifires uses multi-layer laminated structures with intumescent interlayers that react under heat to form an insulating barrier. This technology directly addresses the BNBC’s requirements for compartmentation in buildings exceeding 20 stories, where stairwell pressurization and smoke control systems must integrate seamlessly with fire-rated glazing. By offering localized technical support and certified test reports, Antifires provides a straightforward path to regulatory compliance for Bangladesh’s evolving skyline.

Bangladesh National Building Code 2020 Compliance for Fire Resistant Glazing Systems

The Bangladesh National Building Code (BNBC) 2020 establishes clear fire-resistance ratings for glazed elements in external walls, exit enclosures, and fire compartments. For commercial towers in Dhaka and industrial warehouses in Chittagong, the code typically requires a minimum of 60 minutes of integrity (E60) for partition glazing, with higher ratings (E90 or E120) for stairwell enclosures protecting means of egress. Antifires’ systems are tested to BS 476 Part 22 and EN 1634-1, ensuring that the glass and frame assembly meets or exceeds these localized thresholds.

Compliance with BNBC 2020 also involves verifying that the glazing system can withstand the thermal shock and pressure differentials specified in the code’s fire resistance tables. Antifires provides third-party test reports from accredited laboratories, detailing performance under standard time-temperature curves. These reports are essential for building permit applications in Dhaka’s Rajuk area or for Chittagong Development Authority (CDA) approvals. The following table summarizes typical BNBC 2020 requirements and corresponding Antifires product capabilities:

BNBC 2020 ApplicationRequired RatingAntifires SolutionTest Standard
Exit enclosure glazing (high-rise)E90 / EI6026mm door glass (E90, I68)BS 476 Part 22
Fire compartment partitionsE60 / EI3010mm FPOS (E135, I16)BS EN 1364-1
External wall glazingE120 / EI12050mm EI120 systemBS 476 Part 22

For projects requiring integration with sprinkler systems or smoke control, Antifires’ frames are designed to accommodate intumescent seals and ceramic wool backings, as specified in BNBC 2020 section on fire-stopping. This ensures that the entire assembly—glass, frame, and sealant—acts as a cohesive barrier against fire and smoke.

Selecting E-Class and EI-Class Fire Rated Glass for Bangladesh’s Cyclone and Heat Exposure

Bangladesh’s tropical climate, characterized by high humidity, intense UV exposure, and cyclone-prone coastal winds, demands fire rated glass that maintains its structural integrity under thermal stress. Antifires offers two primary classes of fire rated glass: E-class (integrity only) and EI-class (integrity and insulation). For stairwells in Dhaka’s high-rises, where radiant heat control is less critical, E90 systems using 6mm to 10mm laminated glass provide cost-effective compliance. In contrast, for hospital operating theaters or hotel lobbies where occupant proximity to glazing is high, EI30 or EI60 systems with multi-layer intumescent interlayers are specified to limit temperature rise on the unexposed side.

Technical parameters for these systems include glass thicknesses ranging from 10mm to 54mm, with intumescent interlayers that activate at approximately 120°C to form an insulating foam. This foam blocks radiant heat transfer, a critical feature for Bangladesh’s cyclone shelters where glazing must remain intact under windborne debris impact. Antifires’ glass is tested for UV stability per ASTM E119 conditions, ensuring that the interlayer does not degrade under prolonged sunlight exposure in Chittagong’s port warehouses.

The selection between E and EI classes depends on the specific project scenario:

  • E-class (e.g., 10mm FPOS): Ideal for exit corridors where fire spread prevention is the primary goal, offering up to 135 minutes of integrity.
  • EI-class (e.g., 28mm EI60): Required for fire compartments where occupants may be within 2 meters of the glazing, providing up to 64 minutes of insulation.
  • High-performance EI120 (50mm/54mm): Used in industrial facilities near Sylhet or Khulna, where both fire and thermal insulation are mandated by local fire service regulations.

Antifires provides detailed thermal shock resistance data from furnace tests conducted at ambient temperatures of 27°C–36°C, replicating Bangladesh’s typical test environment. This ensures that the glass performs reliably under local climatic conditions.

Fire Rated Glass Applications in Dhaka High-Rises and Sylhet Industrial Projects

In Dhaka’s 20+ story commercial towers, fire rated glazing is integral to lobby partitions and emergency exit corridors. Antifires supplies 60-minute fire rated glass systems for these applications, tested to BS 476 Part 22 and EN 1634-1. The systems use G.M.S. hollow steel frames with 12mm–15mm fire-rated insulation boards and ceramic wool seals, ensuring that the assembly maintains integrity under the positive pressure differentials typical of high-rise stairwells. For retrofit projects in older Dhaka buildings, Antifires offers frame adapters that allow installation without structural modifications, matching BNBC 2020 requirements for existing structures.

Sylhet’s tea processing plants and garment factories present unique challenges, requiring 60-minute fire windows for hazardous area separation. These facilities often involve dust-laden environments or chemical storage zones where fire spread must be contained. Antifires’ 21mm FPOS glass (integrity 120 min, insulation 30 min) provides a robust solution, with multi-layer laminated construction that resists impact and thermal shock. The glass is installed with expansion gaps of 3mm–5mm filled with ceramic fiber, accommodating thermal movement without compromising the fire barrier.

For both new constructions and retrofits, Antifires coordinates with local MEP engineers to integrate fire rated glazing with sprinkler systems and smoke control dampers. The following list highlights key application scenarios:

  • Dhaka commercial high-rises: Lobby partitions using 26mm door glass (E90, I68) for aesthetic transparency with fire safety.
  • Chittagong port warehouses: 28mm EI60 panels for storage area separation, tested to withstand 66 minutes of fire exposure.
  • Sylhet industrial facilities: 50mm EI120 systems for chemical storage zones, providing 120 minutes of both integrity and insulation.

Antifires also provides structural deflection data from furnace tests, showing maximum deflection of 38mm–152mm toward the furnace, which is critical for designing expansion joints and frame anchoring in seismic zones.

Antifires Local Stock and BNBC-Certified Supply Chain for Bangladesh Contractors

Antifires maintains a dedicated warehouse in Chattogram (Chittagong) and partners with Dhaka-based fire safety consultants to ensure rapid delivery and technical support for Bangladesh contractors. The supply chain is optimized for BNBC 2020 compliance, with all products carrying third-party test reports from accredited labs per BS 476 and EN standards. Typical lead times are 2 weeks for standard configurations, including fire rated glass, doors, and frames. For urgent projects in Dhaka’s commercial districts, expedited shipping can reduce this to 7–10 working days.

Installation coordination is managed through local teams trained in Antifires’ system specifications, including frame anchoring with M6/M8 bolts at 300mm–600mm spacing and ceramic wool sealant application. The following table outlines the supply chain capabilities:

ServiceCoverage AreaLead TimeDocumentation Provided
Warehouse stock (Chattogram)Chittagong, Cox’s Bazar2 weeksTest reports, BNBC compliance certificates
Dhaka consultant partnershipDhaka, Narayanganj2–3 weeksInstallation manuals, MEP integration guides
Sylhet industrial projectsSylhet, Moulvibazar3 weeksFactory inspection reports, warranty documents

For building permit approvals, Antifires provides a compliance package that includes the test standard references (BS 476 Part 22, EN 1634-1), the furnace test conditions (Type K thermocouples, 9–12 channels), and the certified ratings (E60, EI60, EI120). This documentation satisfies the Bangladesh Fire Service and Civil Defence’s requirements for high-occupancy buildings, ensuring a smooth approval process for architects and MEP engineers.

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Frequently Asked Questions (FAQ)

Yes, Antifires fire rated glass systems are designed to meet the Bangladesh National Building Code 2020 requirements for high-rise exit enclosures. The BNBC 2020 mandates that glazed elements in stairwells and means of egress provide at least 60 minutes of integrity (E60), with many projects requiring E90 or E120 for additional safety. Antifires’ 26mm door glass, tested to BS 476 Part 22, achieves 89–90 minutes of integrity and 68 minutes of insulation, exceeding the typical E60 requirement. The systems also incorporate intumescent seals and ceramic wool backings, which are specified in BNBC 2020 for fire-stopping around frames. Third-party test reports from accredited labs are provided with every order, directly supporting building permit applications with Rajuk or the Chittagong Development Authority.

For Chittagong port warehouse partitions, Antifires offers fire rated glass with ratings from E60 to EI120, depending on the specific hazard classification. Standard solutions include the 28mm EI60 panel (integrity 66 min, insulation 64 min) for general storage areas, and the 50mm EI120 system for high-risk zones such as flammable material storage. These ratings are verified per BS 476 Part 22 and EN 1364-1, using furnace tests with Type K thermocouples and pressure conditions of 0 ±2Pa. The glass structures use multi-layer laminated construction with intumescent interlayers, ensuring that radiant heat transmission is controlled even under prolonged fire exposure. Antifires provides detailed test reports showing maximum temperature rise on the unexposed side, which is critical for warehouse safety audits by the Bangladesh Fire Service.

Antifires supports local delivery and installation coordination for projects in Dhaka and Sylhet through a dedicated supply chain. A warehouse in Chattogram stocks standard configurations of fire rated glass, doors, and frames, ensuring 2-week lead times for most orders. For Dhaka projects, Antifires partners with local fire safety consultants who provide on-site installation supervision and MEP integration support. In Sylhet, the company coordinates with regional contractors to manage delivery to industrial sites, including tea processing plants and garment factories. All shipments include installation manuals with specifications for frame anchoring (M6/M8 bolts at 300–600mm spacing), expansion gaps (3–5mm with ceramic fiber), and sealant application. Technical support is available via email and phone for any project-specific coordination needs.