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Professional 16.76mm (8+0.76+8) and 17.52mm (8+1.52+8) laminated glass. Ultra-high strength for ballistic glazing, blast-resistant windows, extreme-load floors, and high-security detention centers. EN 14449 / CE / EN 1063 / EN 356 certified. Max size 2550×7000mm. Request FOB quote.
Ultra‑High Strength Structural & Security Glass for Ballistic, Blast & Extreme Load Applications
Two advanced laminated glass constructions push the boundaries of safety and structural performance. Both use two 8mm glass panes – significantly thicker than standard laminated glass – and differ in the interlayer thickness: 0.76mm PVB for 16.76mm and 1.52mm PVB (or SGP) for 17.52mm. The combination of thick glass and robust interlayer delivers exceptional resistance to ballistic threats, explosive blasts, forced entry, and extreme static loads.
These thicknesses are specified for mission‑critical applications: military checkpoints, embassy windows, nuclear facilities, high‑security detention centers, and glass floors supporting heavy vehicles. Both meet EN 14449, CE, ASTM C1172, and AS‑NZS 2208 standards, with additional certifications available for ballistic and burglary resistance.
| Key Specification | 16.76mm (8+0.76+8) | 17.52mm (8+1.52+8) |
|---|---|---|
| Glass Makeup | 8mm + 0.76mm PVB + 8mm | 8mm + 1.52mm PVB/SGP + 8mm |
| Total Thickness | 16.76mm (≈21/32″) | 17.52mm (≈11/16″) |
| Maximum Size | 2550 × 7100 mm | 2550 × 6650 mm |
| Unit Weight | ~40.0 kg/m² | ~40.0 kg/m² |
| Light Transmittance (Clear) | ≥ 85% | ≥ 84% |
| Sound Reduction (Rw) | 38 dB | 40 dB |
| Burglar Resistance (EN 356) | P5A | P6B / P7B |
| Bullet Resistance (EN 1063) | BR4‑BR5 (with PC) | BR5‑BR6 (with PC) |
| Blast Resistance (GSA‑TS01) | Hazard Level 1 | Hazard Level 1 (higher charge) |
| PVB Color Options | Clear, Bronze, Grey, Custom | Clear, Bronze, Grey, Custom |
| Certification | EN 14449 / CE / ASTM / AS‑NZS / EN 356 / EN 1063 | Same + STANAG 4569 L3‑L4 |
| MOQ | 50 m² | 30 m² |
| Lead Time | 25–35 days | 35–50 days |
| Property | 13.52mm (6+1.52+6) | 16.76mm (8+0.76+8) | 17.52mm (8+1.52+8) | 21.52mm (10+1.52+10) |
|---|---|---|---|---|
| Typical Use | High‑security, ballistic | Military, embassy, extreme floors | Blast, ballistic, detention | Nuclear, submarine, special |
| Weight | ~30.0 kg/m² | ~40.0 kg/m² | ~40.0 kg/m² | ~50.0 kg/m² |
| Relative Stiffness (vs 6.38mm) | 5.8× | 11.4× | 11.4× | 21.1× |
| Burglar Resistance | P4A‑P5A | P5A | P6B‑P7B | P8B |
| Bullet Resistance | BR3‑BR4 | BR4‑BR5 | BR5‑BR6 | BR6‑BR7 |
| Blast Resistance | Basic | Good | Excellent | Exceptional |
| Best For | Security, ballistic | High‑security, extreme loads | Blast + ballistic combo | Nuclear, sub‑aquatic 16.76mm is the high‑security structural thickness – offering excellent ballistic and burglary resistance while remaining manageable in weight and size. 17.52mm adds a thicker interlayer for superior blast mitigation and the highest forced‑entry ratings, making it the preferred choice for detention centers, embassies in high‑threat environments, and military command centers. |
16.76mm laminated glass, when combined with polycarbonate spall shields, achieves EN 1063 BR4‑BR5 ratings – stopping multiple rounds from assault rifles (7.62×39mm, 5.56×45mm) and handguns. The 8mm glass panes provide the mass needed to decelerate projectiles.
For diplomatic missions in high‑risk regions, 16.76mm laminated glass offers a proven balance of ballistic protection, blast resistance, and optical clarity. It meets GSA blast test standards at Hazard Level 1 for moderate explosive charges.
With 11.4× the stiffness of 6.38mm, 16.76mm laminated glass can support uniform loads exceeding 12 kN/m² – sufficient for light service vehicles, heavy exhibition displays, and public gathering spaces.
Prison perimeter windows and secure observation rooms use 16.76mm laminated glass for its P5A burglary resistance – it withstands sustained attacks with sledgehammers, crowbars, and power tools.
For embassies in the highest threat environments, 17.52mm laminated glass (often with SGP interlayer) provides enhanced blast survival. The thicker 1.52mm interlayer absorbs more shock energy and maintains structural integrity even after multiple explosions.
Correctional facilities specify 17.52mm laminated glass for cell windows that must resist both ballistic attack and sustained vandalism. The P6B‑P7B rating ensures that even prolonged assault with heavy tools will not breach the glass.
Military bunkers, police command centers, and emergency operations rooms use 17.52mm laminated glass for its combined ballistic (BR5‑BR6) and blast resistance, protecting personnel from simultaneous threats.
For hot cells and containment areas requiring both radiation shielding and structural integrity, 17.52mm laminated glass (combined with lead‑doped glass) provides the baseline for safety.
Checkpoints and mobile command posts use 17.52mm laminated glass as the structural core of multi‑ply ballistic armor, achieving STANAG 4569 Level 3‑4 protection against armor‑piercing rounds.
All fabrication must be completed before lamination. We offer:
| Parameter | 16.76mm | 17.52mm |
|---|---|---|
| Nominal Thickness | 16.76mm (±0.3mm) | 17.52mm (±0.3mm) |
| Glass Composition | Float glass (annealed or tempered) – symmetric (8mm + 8mm) | Same |
| Interlayer | PVB 0.76mm – security or acoustic grade | PVB 1.52mm – security, ballistic, or SGP equivalent |
| Maximum Size | 2550 × 7150 mm | 2550 × 6750 mm |
| Minimum Size | 400 × 400 mm | 500 × 500 mm |
| Weight | ~40.0 kg/m² | ~40.0 kg/m² |
| Light Transmittance (Clear) | ≥ 85% | ≥ 84% |
| UV Blockage | >99% | >99% |
| Sound Reduction (Rw) | 38 dB (‑2;‑3) | 40 dB (‑2;‑3) |
| U‑Value (monolithic) | 4.8 W/m²K | 4.7 W/m²K |
| Burglar Resistance (EN 356) | P5A | P6B / P7B |
| Bullet Resistance (EN 1063) | BR4‑BR5 (with PC spall shield) | BR5‑BR6 (with PC spall shield) |
| Blast Resistance (GSA‑TS01) | Hazard Level 1 (moderate charge) | Hazard Level 1 (higher charge) |
| Fire Performance | Euroclass B‑s1,d0 | Euroclass B‑s1,d0 |
| Edgework | Flat polished, arrissed, seamed | Same |
| Packaging | Custom heavy‑duty crates with spreader bars and shock sensors | Same |
| Benefit | 16.76mm | 17.52mm |
|---|---|---|
| Structural Stiffness | 11.4× that of 6.38mm | Same glass stiffness |
| Ballistic Protection | BR4‑BR5 (assault rifle) | BR5‑BR6 (armor‑piercing) |
| Burglar Resistance | P5A (heavy tools) | P6B‑P7B (extreme attack) |
| Blast Mitigation | Good | Excellent |
| Acoustic Performance | Very good (Rw 38) | Excellent (Rw 40) |
| Weight | ~40 kg/m² – requires mechanical handling | Same |
| Best For | High‑security, extreme loads | Blast + ballistic combo, detention |
Q1: What is the difference between 16.76mm and 17.52mm?
Both use 8mm+8mm glass. The difference is the interlayer: 0.76mm vs 1.52mm. The thicker interlayer in 17.52mm provides higher ballistic (BR5‑BR6 vs BR4‑BR5), burglary (P6B‑P7B vs P5A), and blast resistance.
Q2: Can these thicknesses stop armor‑piercing rounds?
17.52mm, when combined with polycarbonate spall shields and possibly additional glass plies, can achieve STANAG 4569 Level 4 protection against 7.62×51mm AP rounds. 16.76mm stops assault rifle rounds but not armor‑piercing.
Q3: What is the weight?
Both weigh approximately 40.0 kg/m². A 1.5 m × 2.4 m panel (3.6 m²) weighs about 144 kg – requires crane or hoist for installation.
Q4: Can I get tempered laminated versions?
Yes. Tempering one or both panes before lamination increases overall strength, though ballistic performance may require annealed glass for better energy absorption. We advise consulting our engineers.
Q5: What is the maximum size?
16.76mm: 2550×7100mm; 17.52mm: 2550×6650mm. Larger sizes may be possible – please inquire.
Q6: Do you offer SGP interlayer?
Yes. SGP (SentryGlas®) provides 5× the tear strength of PVB and is recommended for blast‑resistant and extreme‑load applications.
Q7: How do I choose between these two?
Tell us your project requirements and we’ll respond within 48 hours with a competitive FOB price.
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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.
