South Carolina State Fire Code Compliance for Charleston Commercial Glazing Systems
Charleston’s building projects, particularly those in the historic district and coastal zones, must adhere to the 2021 South Carolina State Fire Code, which incorporates the IBC with specific amendments for windborne debris regions. For commercial glazing systems, this mandates that fire-rated assemblies meet the requirements of UL 9 (fire tests of window assemblies) and UL 10C (positive pressure fire tests of door assemblies). Antifires’ fire rated glass systems are fully tested to these standards, providing the necessary documentation for compliance with fire-resistance-rated wall requirements in egress paths and separation barriers.
Key compliance considerations for Charleston specifiers include:
- Egress Corridors: Glazed assemblies in exit access corridors must maintain a minimum 60-minute fire resistance rating (Class E or EI) as per IBC Chapter 10. Antifires’ 28mm EI60 panel (integrity 66 min, insulation 64 min) and 26mm door glass (integrity 89–90 min, insulation 68 min) are suitable for these applications.
- Historic District Renovations: Adaptive reuse of 19th-century masonry buildings in the French Quarter requires fire-rated glazing that does not compromise the facade. Antifires’ systems, installed with G.M.S. hollow steel frames and 3mm–6mm ceramic wool seals, meet the BS 476 Part 22 and BS EN 1634-1 standards, ensuring compatibility with existing structures.
- Coastal Wind Loads: For projects in windborne debris zones, Antifires offers impact-resistant fire rated glass options that satisfy both fire safety and structural wind load requirements. The 15mm FPOS (multi-layer tempered glass with intumescent gel) provides integrity up to 132 minutes, suitable for exterior glazing in high-rise buildings.
By selecting Antifires, Charleston architects and contractors can confidently submit UL listing documentation to the Charleston Building Services Department, expediting the plan review process for both new construction and historic district renovations.
Fire Rated Glass Grade Selection Based on Charleston’s Coastal Humidity and Thermal Stress
Charleston’s coastal climate, characterized by high humidity, salt air, and intense solar radiation, presents unique challenges for fire rated glazing systems. Selecting the appropriate glass grade is critical to ensure long-term performance and compliance with ASTM E119 fire test conditions. For stairwells, corridor partitions, and interior barriers, a minimum 60-minute fire resistance rating (Class E for integrity or EI for integrity plus insulation) is typically required, but the environmental conditions demand additional considerations.
Antifires offers multi-laminate fire rated glass specifically designed to withstand thermal stress and humidity without delamination or optical distortion. Key product options for Charleston’s environment include:
| Glass Type | Structure | Fire Rating | Best Application |
|---|
| 21mm FPOS | Multi-layer composite insulated fire-resistant glass | Integrity 120 min, Insulation 30 min | Interior partitions, stairwells in mixed-use buildings |
| 28mm EI60 | 6mm + 5.5mm gel + 5mm + 5.5mm gel + 6mm | Integrity 66 min, Insulation 64 min | Fire barriers requiring thermal insulation in humid zones |
| 50mm/54mm EI120 | Multi-layer insulated fire-resistant structure | Integrity 120 min, Insulation up to 120 min | High-rise egress cores, exterior glazing with low-E coatings |
For King Street retail storefronts, Antifires’ fire rated glass can be specified with low-E coatings to mitigate thermal stress from direct sun exposure. These insulated units maintain clarity and structural integrity under fire conditions, as verified by BS EN 1364-1 and AS1530.4 testing. The use of intumescent fire seals (20mm × 4mm) and ceramic fiber expansion gaps (3mm–5mm) ensures the assembly accommodates thermal movement without compromising the fire barrier. By selecting the appropriate grade based on exposure and rating requirements, Charleston specifiers can achieve both fire safety and long-term durability in the coastal environment.
Fire Rated Glass Applications in Charleston’s Mixed-Use Historic and New Construction Projects
Charleston’s unique urban fabric—a blend of 19th-century masonry buildings in the French Quarter and Upper Peninsula with new commercial developments on Ashley River Road—requires versatile fire rated glazing solutions. Antifires’ fire rated glass doors and windows are engineered for both adaptive reuse and new construction, meeting IBC Chapter 7 fire barrier requirements while addressing SC coastal wind load provisions.
Application scenarios for Charleston projects include:
- Historic Hotel Lobbies: In adaptive reuse of 19th-century masonry structures, fire rated glazing is required to separate hotel lobbies from egress corridors. Antifires’ 26mm door glass (integrity 89–90 min, insulation 68 min) provides a transparent barrier that preserves the historic aesthetic while meeting BS 476 Part 22 integrity standards. The G.M.S. hollow steel frames are designed to fit within existing openings with minimal structural modification.
- Medical Offices on Ashley River Road: New medical facilities require fire barriers that comply with both IBC Chapter 7 and coastal wind load requirements. Antifires’ 50mm/54mm EI120 systems offer integrity and insulation for 120 minutes, suitable for separating patient care areas from egress paths. These assemblies are tested to UL 10C for positive pressure conditions, ensuring performance in real fire scenarios.
- Mixed-Use Developments in Upper Peninsula: For projects combining residential units with ground-floor retail, Antifires’ fire rated glass partitions provide a cost-effective solution for corridor separation. The 21mm FPOS (integrity 120 min, insulation 30 min) is ideal for interior barriers where thermal insulation is not critical but integrity must be maintained for egress.
Each installation uses M6/M8 anchor bolts at 300–600mm spacing and 12mm–15mm fire-rated insulation boards to ensure structural stability under fire conditions. Antifires’ engineering team provides project-specific cut sheets and UL listing documentation to support plan review by the Charleston Building Services Department, reducing approval timelines for both renovation and new construction projects.
Antifires’ Local Engineering Support and UL-Certified Product Line for Charleston Specifiers
Antifires provides Charleston architects and contractors with comprehensive engineering support and a UL-certified product line designed to expedite project approvals. For specifiers working with the Charleston Building Services Department, Antifires offers project-specific fire rated glass cut sheets and UL listing documentation, ensuring that all assemblies meet the requirements of UL 9 and UL 10C for fire doors and glazed wall assemblies. This documentation is critical for plan review, particularly for projects in the historic district where compliance with local fire code amendments is mandatory.
The localized inventory includes:
- 45-Minute Fire Rated Glazing: Suitable for interior partitions and vision panels in egress corridors. Antifires’ 6mm E90 glass (integrity 90 minutes per BS 476 Part 22) provides a cost-effective solution for applications where insulation is not required.
- 90-Minute Fire Rated Glazing: For stairwells and fire barriers in commercial high-rises. The 15mm FPOS (integrity up to 132 min, insulation 33–34 min) offers robust performance with impact-resistant options for coastal wind zones.
- Impact-Resistant Options: For projects in windborne debris regions, Antifires’ fire rated glass can be combined with laminated layers to meet both fire safety and structural wind load requirements. The 28mm EI60 panel (integrity 66 min, insulation 64 min) is available with enhanced impact resistance for exterior applications.
Antifires’ engineering team provides on-site consultation for installation details, including ceramic wool/ceramic tape (3mm–6mm, density 210 kg/m³) and intumescent fire seals (20mm × 4mm) to ensure proper sealing and expansion gap management. With localized inventory and fast delivery, Antifires reduces lead times for renovation projects on the Battery and new construction across the Charleston metro area. For detailed product specifications and UL listing numbers, contact Antifires’ technical support team for project-specific guidance.
