SBW GT55 TB
Geometry system
- System depth: 110 mm
- Maximum door leaf size: 1250mm x 2400mm
- Maximum door leaf weight: 110kg
Thermal performance
- U value 1.9 W/m²k (Double glazing)
- U value 1.72 W/m²K (Triple glazing)
Maximum Glass Thickness
- Glazing Tickness: 24mm – 40mm
Acoustic Performance
- npd
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Description
Designed with security as a priority, the GT55 TB is one of the most comprehensive aluminium door systems available on the market. Engineered to meet the demands of high-security environments, the system achieves PAS 24 certification and Secured by Design (SBD) accreditation across a wide range of configurations, including single and double doors, screens, sidelights, and fanlights.
It supports advanced locking solutions, including panic, mechanical, and electro-mechanical hardware options for both single and double doors, delivering enhanced protection without compromising ease of use.
Ideal for heavy-duty commercial and public sector applications such as offices, hospitals, schools, and multi-residential buildings, the GT55 TB combines robust construction with outstanding thermal efficiency. The system achieves impressive U-values of 1.7 W/m²K with double glazing and 1.5 W/m²K with triple glazing, helping to improve energy performance and comfort.
Design features
- Security tested to PAS 24
- Thermally broken for enhanced performance
- Sightlines of 145mm (single door) and 176mm (double door)
- Anti-finger trap styles
- Mid-rail and lay bar
- Angular corner feature designs
Options
- Single and double door configurations
- Available with a full range of security and customisable hardware
- Mechanical and electro-mechanical multipoint locking options
- Electronic and manual access systems easily integrated
- Glazed or non-glazed options
- Available in single or dual colour option, polyester powder coating and anodised finishes
- Standard or DDA compliant overhead closer
Cross-Section
PERFORMANCE:
| GT55 TB SINGLE | GT55 TB DOUBLE | |
|---|---|---|
| PERFORMANCES | ||
| U value W/m²K (Double glazing) | 1.9 W/m²K | 1.82 W/m²K |
| U value W/m²K (Triple glazing) | 1.72 W/m²K | 1.62 W/m²K |
| Acoustic performance (dB) | npd | npd |
| Air tightness (Pa) | Class 0 (0 Pa) | Class 0 (0 Pa) |
| Water tightness (Pa) | Class 1A (0 Pa) | Class 1A (0 Pa) |
| Wind load (Pa) | Class 0 (0 Pa) | Class 0 (0 Pa) |
| Security | Q-mark | Q-mark |
| Certifications | Q-mark | Q-mark |
| Durability EN1191 category | 50,000 Cycles | 50,000 Cycles |
| SIZE LIMITS | ||
| System depth | 110 mm | 110 mm |
| Maximum door leaf size | 1250mm x 2400mm | 2500mm x 2400mm |
| Maximum door leaf weight | 110kg | 110kg |
| Glazing thickness | 24mm – 40mm | 24mm – 40mm |
| FEATURES | ||
| Thermally broken | ✓ | ✓ |
| Low threshold | ✓ | ✓ |
| Panel door | ✓ | ✓ |
| HARDWARE | ||
| Multi-point locking | ✓ | ✓ |
| Barrel hinges | – | – |





