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Professional 12.38mm (6+0.38+6), 12.76mm (6+0.76+6) and 13.52mm (6+1.52+6) laminated glass. Structural grade for glass floors, stair treads, large balustrades, and high-security glazing. EN 14449 / CE certified. Max size 2550×7800mm. Request FOB quote.
Structural & High‑Security Grade for Glass Floors, Stair Treads, Large Balustrades & Anti‑Ballistic Glazing
Three closely related thicknesses cover the transition from structural laminated glass to high‑security laminated glass. All three use two 6mm glass panes but differ in the PVB interlayer thickness – 0.38mm for 12.38mm, 0.76mm for 12.76mm, and 1.52mm for 13.52mm. The progressively thicker interlayer increases impact energy absorption, burglary resistance, and acoustic performance, while the glass stiffness remains identical across all three (since the glass panes are the same).
These thicknesses are specified for projects where safety factors must be high – glass floors, stair treads, large‑span balustrades, anti‑ballistic windows, and blast‑resistant glazing. All three meet EN 14449, CE, ASTM C1172, and AS‑NZS 2208 standards.
| Key Specification | 12.38mm (6+0.38+6) | 12.76mm (6+0.76+6) | 13.52mm (6+1.52+6) |
|---|---|---|---|
| Glass Makeup | 6mm + 0.38mm PVB + 6mm | 6mm + 0.76mm PVB + 6mm | 6mm + 1.52mm PVB + 6mm |
| Total Thickness | 12.38mm (≈½″) | 12.76mm (≈½″+) | 13.52mm (≈17/32″) |
| Maximum Size | 2550 × 7800 mm | 2550 × 7300 mm | 2550 × 6800 mm |
| Unit Weight | ~30.0 kg/m² | ~30.0 kg/m² | ~30.0 kg/m² |
| Light Transmittance (Clear) | ≥ 87% | ≥ 86% | ≥ 85% |
| Sound Reduction (Rw) | 35 dB | 37 dB | 39 dB |
| Impact Resistance (EN 12600) | Class 1B1 | Class 1B1 (higher energy) | Class 1B1 (very high) |
| Burglar Resistance (EN 356) | – | P2A | P4A / P5A |
| Bullet Resistance (EN 1063) | – | – | BR3‑BR4 (with polycarbonate) |
| PVB Color Options | Clear, Milky White, Bronze, Grey, Blue, Green, Custom | Same | Same |
| Certification | EN 14449 / CE / ASTM / AS‑NZS | Same + EN 356 | Same + EN 356 + EN 1063 |
| MOQ | 100 m² | 80 m² | 50 m² |
| Lead Time | 15–20 days | 18–25 days | 25–35 days |
| Property | 10.38mm (5+0.38+5) | 12.38mm (6+0.38+6) | 12.76mm (6+0.76+6) | 13.52mm (6+1.52+6) |
|---|---|---|---|---|
| Typical Use | Partitions, hurricane glazing | Glass floors, stair treads, large balustrades | Enhanced structural, security | Anti‑ballistic, blast, extreme security |
| Weight | ~25.0 kg/m² | ~30.0 kg/m² | ~30.0 kg/m² | ~30.0 kg/m² |
| Relative Stiffness | 3.4× (vs 6.38mm) | 5.8× (vs 6.38mm) | 5.8× | 5.8× |
| Sound Reduction (Rw) | 34 dB | 35 dB | 37 dB | 39 dB |
| Burglar Resistance | – | – | P2A | P4A / P5A |
| Bullet Resistance | – | – | – | BR3‑BR4 (laminate) |
| Best For | Commercial, hurricane | Structural, load‑bearing | Security + structural | Highest security, ballistic 12.38mm is the entry‑level structural thickness – stiff enough for glass floors and stair treads when properly supported. 12.76mm adds a thicker PVB layer for improved security and acoustic performance without changing the glass thickness. 13.52mm is the high‑security structural option – capable of withstanding ballistic threats and providing the highest level of forced‑entry resistance, while maintaining the same load‑bearing capacity. |
12.38mm laminated glass is the minimum recommended thickness for pedestrian glass floors when supported on all four sides. A typical construction is 12.38mm + SGP interlayer (for higher load capacity) or two layers laminated together (e.g., 12.38mm + 12.38mm = 24.76mm for heavy loads).
For glass stair treads with edge support, 12.38mm laminated glass provides adequate strength for residential and light‑commercial use. For higher traffic, consider 12.76mm or thicker.
When balustrade panels exceed 1500mm in width, 12.38mm laminated glass offers the stiffness needed to keep deflection within acceptable limits.
12.38mm can be used for decorative glass fins that provide lateral stability without carrying vertical loads.
For commercial glass floors in shopping malls, museums, and public buildings, 12.76mm laminated glass with SGP interlayer is a common specification. The thicker PVB provides better post‑breakage performance.
Banks, post offices, and government counters use 12.76mm laminated glass for its P2A burglary resistance – it withstands repeated hammer blows and crowbar attacks.
Along highways and railways, 12.76mm laminated glass (often combined with an IGU) provides Rw 37 dB sound reduction, meeting stringent noise control regulations.
For aquarium windows up to 2m water depth, 12.76mm laminated glass offers a safety factor of 4–5× when properly framed.
13.52mm laminated glass, when combined with polycarbonate spall shields and additional glass plies, can achieve EN 1063 BR3‑BR4 ratings – stopping handgun rounds (9mm, .357 Magnum, .44 Magnum) and some rifle threats.
Government buildings, embassies, and critical infrastructure specify 13.52mm laminated glass for its ability to survive explosive blast overpressures. The 1.52mm PVB interlayer absorbs shock energy and holds fragments together.
Prisons and psychiatric facilities use 13.52mm laminated glass for its resistance to sustained attack and its ability to remain intact even after multiple impacts.
For glass floors supporting heavy exhibition displays or occasional vehicle traffic (light service vehicles), 13.52mm laminated with SGP provides the highest load rating among standard laminated thicknesses.
All fabrication must be completed before lamination. We offer:
| Parameter | 12.38mm | 12.76mm | 13.52mm |
|---|---|---|---|
| Nominal Thickness | 12.38mm (±0.2mm) | 12.76mm (±0.2mm) | 13.52mm (±0.3mm) |
| Glass Composition | Float glass (annealed or tempered) – symmetric (6mm + 6mm) | Same | Same |
| Interlayer | PVB 0.38mm – standard or acoustic | PVB 0.76mm – standard, acoustic, or security | PVB 1.52mm – security, ballistic, or SGP equivalent |
| Maximum Size | 2550 × 7800 mm | 2550 × 7400 mm | 2550 × 6850 mm |
| Minimum Size | 300 × 300 mm | 300 × 300 mm | 400 × 400 mm |
| Weight | ~30.0 kg/m² | ~30.0 kg/m² | ~30.0 kg/m² |
| Light Transmittance (Clear) | ≥ 87% | ≥ 86% | ≥ 85% |
| UV Blockage | >99% | >99% | >99% |
| Sound Reduction (Rw) | 35 dB (‑2;‑3) | 37 dB (‑2;‑3) | 39 dB (‑2;‑3) |
| U‑Value (monolithic) | 5.2 W/m²K | 5.1 W/m²K | 5.0 W/m²K |
| Impact Classification (EN 12600) | Class 1B1 | Class 1B1 (higher energy) | Class 1B1 (very high energy) |
| Burglar Resistance (EN 356) | – | P2A | P4A / P5A |
| Bullet Resistance (EN 1063) | – | – | BR3‑BR4 (with PC) |
| Fire Performance | Euroclass B‑s1,d0 | Euroclass B‑s1,d0 | Euroclass B‑s1,d0 |
| Edgework | As per customer specification | As per customer specification | As per customer specification |
| Packaging | Heavy‑duty plywood crates, steel strapping, foam protection | Same | Custom heavy‑duty with spreader bars |
| Benefit | 12.38mm | 12.76mm | 13.52mm |
|---|---|---|---|
| Structural Stiffness | 5.8× that of 6.38mm | Same glass stiffness | Same glass stiffness |
| Load‑Bearing | Glass floors, stairs (moderate) | Glass floors (high traffic) | Extreme loads, vehicle access |
| Security | Basic | P2A burglar resistant | P4A‑P5A + ballistic |
| Acoustic | Good (Rw 35) | Very good (Rw 37) | Excellent (Rw 39) |
| Cost | Lowest of the three | Moderate | Highest |
| Best For | Structural glazing, standard safety | Security + structural | Ballistic, blast, extreme security |
Q1: What is the difference between 12.38mm, 12.76mm and 13.52mm?
All three use the same 6mm+6mm glass panes. The difference is the PVB interlayer thickness: 0.38mm, 0.76mm, and 1.52mm respectively. Thicker interlayer = higher impact resistance, better acoustic performance, and higher security ratings.
Q2: Which thickness is suitable for glass floors?
All three can be used for glass floors, depending on load requirements. 12.38mm is suitable for residential light traffic; 12.76mm for commercial high traffic; 13.52mm for extreme loads or when combined with SGP.
Q3: Can these thicknesses stop bullets?
Only 13.52mm (when combined with polycarbonate and additional glass plies) can achieve ballistic ratings. 12.38mm and 12.76mm are not ballistic‑rated.
Q4: What is the weight?
All three weigh approximately 30.0 kg/m². A 1.5 m × 2.4 m panel (3.6 m²) weighs about 108 kg.
Q5: Can I get tempered laminated versions?
Yes. One or both panes can be tempered before lamination for increased strength. This is common for glass floors and balustrades.
Q6: What is the maximum size?
12.38mm: 2550×7800mm; 12.76mm: 2550×7300mm; 13.52mm: 2550×6800mm. Larger sizes may be possible – please inquire.
Q7: Do you offer SGP interlayer instead of PVB?
Yes. SGP (SentryGlas®) provides 5× the tear strength of PVB and is recommended for glass floors and overhead glazing. Specify “SGP” when ordering.
Q8: How do I choose between these three?
Tell us your project requirements and we’ll respond within 24 hours with a competitive FOB price.
Please provide:
Browse our laminated glass series:
1.6.38mm Laminated Glass | 6.38mm Safety Laminated Glass for Windows, Doors & Railings | 3+0.38+3 PVB
2.8.38mm Laminated Glass – Standard Safety Glass for Doors, Light Railings & Skylights
3. 10.38mm & 10.76mm Laminated Glass – Commercial & High-Performance Safety Glass
4.12.38mm, 12.76mm & 13.52mm Laminated Glass – Structural & High‑Security Safety Glass
5. 16.76mm & 17.52mm Laminated Glass – Ultra‑High Strength Structural & Security Glass
6. 20.76mm & 21.52mm Laminated Glass – Ultra‑Heavy Structural & Extreme Security Glass
7.25.52mm Laminated Glass – Custom Extreme Grade for Nuclear Submarines, Deep‑Submergence & Maximum Security
8. 31.52mm Laminated Glass – Ultra‑Deep Submergence, Extreme Armor & Special Project Grade
With over 20 years of experience and expertise in glass manufacturing and processing, we are seasoned glass specialists, ready to answer your questions and provide guidance on product selection, installation, and maintenance.
