Project location：
Guizhou Province
Glass Configuration:
12mm+1.52SGP+15mm+1.52SGP+12mm
ultra-clear silk-screened tempered laminated glass
Maximum Glass Size:
4015mm * 2860mm
At Zhongbo Glass, we have built a reputation as the manufacturer of choice for the world’s most thrilling and safety-critical glass structures. The Longli River Bridge Glass Bridge in Guizhou is the latest addition to our portfolio of pedestrian glass bridges that push the limits of engineering and imagination. Spanning a dramatic river gorge, this bridge offers visitors an unparalleled walking experience high above the water, with the entire floor surface constructed from transparent glass panels that we proudly engineered and manufactured.
The project required custom glass floor panels that could safely support constant pedestrian traffic, resist the region’s variable weather, and provide a crystal-clear view of the rushing river below. Our response was a robust ultra-clear, silk-screened, triple-ply SentryGlas® Plus (SGP) laminated glass configuration, fabricated in jumbo sizes exceeding 4 meters in length. The Longli River Bridge Glass Bridge is not just a tourist attraction — it is a demonstration of complete trust in our structural glass technology, with Zhongbo Glass delivering safety you can see through.
For the bridge deck panels, we manufactured a glass composite engineered specifically for horizontal pedestrian loading, anti-slip performance, and absolute visual transparency:
12mm Ultra-Clear Tempered + 1.52mm SentryGlas® Plus (SGP) + 15mm Ultra-Clear Tempered + 1.52mm SGP + 12mm Ultra-Clear Tempered — Silk-Screened Laminated Glass
Every layer in this configuration is optimized for structural reliability and visitor experience:
Triple-Ply Asymmetric Strength: The two outer 12mm plies and a thicker 15mm central core combine to create a 39mm glass stack. This asymmetric design increases bending stiffness and load-bearing capacity, ensuring the panel comfortably supports multiple visitors per square meter with high safety margins.
All Ultra-Clear (Low-Iron) Glass: Every ply is premium low-iron glass, offering a perfectly neutral transparency. Visitors see the river and gorge below in true color — no greenish tint, no distortion — maximizing the breathtaking visual impact.
Fully Tempered for Strength: All three glass plies are thermally tempered to a surface compression exceeding 69 MPa, making each layer four to five times stronger than ordinary annealed glass. This provides robust resistance to impact and thermal stress.
Dual 1.52mm SGP Interlayers: Two layers of SentryGlas® Plus ionoplast interlayer bond the entire stack into a monolithic structural composite. SGP provides five times the tear strength and vastly superior stiffness compared to PVB. Critically, if all glass plies were to break, the SGP interlayers would hold the panel rigidly in place, maintaining the walking surface and preventing any fall-through.
Silk-Screened Anti-Slip Pattern: The topmost glass surface features a permanent ceramic frit anti-slip pattern applied via silk-screen printing and fused during tempering. This subtle texture provides reliable foot grip, even in damp conditions, while maintaining the floor’s overall transparency. It also serves as a visual comfort feature for visitors.
Total Thickness Exceeds 42mm: With 39mm of glass and over 3mm of SGP, each panel is a dense, rigid slab ready for decades of heavy public use in an outdoor environment.
The maximum glass panel size for this project reached 4,015mm in length by 2,860mm in width, covering an impressive 11.5 square meters per single panel. This size pushes the boundaries of what is practically achievable for a pedestrian-rated, silk-screened laminated glass floor. A panel of this dimension weighs several hundred kilograms and must be handled, transported, and installed with extreme care — all while maintaining perfect flatness and edge integrity.
At Zhongbo Glass, 4-meter-long structural glass floor panels are a well-proven capability, building on our experience with other iconic bridges. Each panel is a monolithic sheet of transparent safety, engineered to perform flawlessly under the feet of countless visitors.
Applying a uniform silk-screened ceramic frit pattern onto a 12mm ultra-clear glass sheet measuring over 4 meters, then tempering it to full strength without distortion, is a precision process. We utilized:
Automated jumbo silk-screen printing to deposit the ceramic ink with exacting consistency across the entire surface.
Simultaneous frit maturation and tempering in our super-jumbo flat tempering furnace. The carefully controlled heating and quench cycle permanently bonds the anti-slip pattern to the glass while achieving full surface compression. The result is a durable, scratch-resistant, and UV-stable walking surface.
Laminating three plies of varying thicknesses (12mm/15mm/12mm) with SGP interlayers at these dimensions is a highly demanding operation. SGP’s stiffness requires flawless glass-to-glass matching and extended de-airing. Our process ensured perfection:
Precision CNC cutting and edge polishing to remove any micro-cracks that could propagate under load.
Class 1 cleanroom layup to eliminate any dust or contamination that could compromise the structural bond.
Multi-stage vacuum bag de-airing specially adapted for thick SGP laminates, extracting every air pocket from between the plies.
A custom autoclave cycle in our large-format autoclave, delivering uniform heat and pressure to achieve full adhesion across all 11.5 square meters. The finished laminate is completely bubble-free, crystal clear, and behaves as a single structural slab.
The Longli River Bridge is exposed to Guizhou’s mountain weather — rain, humidity, and temperature swings. Our panels feature precision-ground and polished edges, which are then fully protected within the bridge’s steel framing system. Combined with SGP’s inherent moisture resistance at the laminate edges, these panels are engineered for long-term outdoor durability.
Transporting heavy, 42mm-thick glass panels to a bridge site spanning a river gorge in Guizhou demands careful logistical planning. We designed reinforced custom transport stillages with vibration-dampening systems, protecting each panel during the journey over mountain roads. All panels arrived on site dimensionally accurate, with zero edge damage or surface defects, and were ready for immediate installation into the bridge structure.
The Longli River Bridge Glass Bridge project reinforces Zhongbo Glass’s unique position as the world’s premier manufacturer of glass for life-safety-critical pedestrian bridges:
Proven Structural Glass Expertise: We specialize in glass that people walk on — floors, bridges, walkways, and stair treads. Our SGP laminates are engineered and tested to support heavy pedestrian loads with the highest safety factors.
Integrated Silk-Screen Anti-Slip Technology: We have the in-house capability to design, print, and fuse custom ceramic frit patterns on jumbo tempered glass, providing permanent, weatherproof anti-slip surfaces without compromising transparency.
SGP Lamination Mastery: Our dedicated SGP cleanrooms and autoclaves produce flawless multi-ply laminates that remain structurally integral even under worst-case glass breakage scenarios — a critical life-safety requirement for glass bridges.
Ultra-Clear Consistency: We source and process only the highest-grade low-iron glass to deliver the crystal-clear views that make glass bridges unforgettable attractions.
Expanding Portfolio of Iconic Bridges: The Longli River Bridge joins our world-class structural glass bridge portfolio, which includes the famous Zhangjiajie Grand Canyon Glass Bridge and the Huajiang Bridge. Our repeated selection for these high-profile, high-risk projects is the strongest testament to our quality and reliability.
Every visitor who steps onto the transparent floor of the Longli River Bridge Glass Bridge experiences a thrill made possible by Zhongbo Glass. We manufactured 4,015mm × 2,860mm ultra-clear silk-screened triple-ply SGP laminated glass panels that deliver uncompromised safety beneath a breathtaking view. This project proves once again that when architects and engineers demand structural glass that people can walk on with absolute confidence, they turn to Zhongbo Glass. We don’t just make glass — we make transparent floors that connect people with nature in the most spectacular way.
Contact Zhongbo Glass today to discuss your next structural glass project. Whether a glass bridge, observation deck, glass floor, or canopy, our team of experts is ready to engineer the transparent solution that will define your landmark attraction.
