NEXCO specification compliant product, the largest expansion device hybrid joint type 3LII.

クリテック工業本社、大阪営業所、福岡営業所

Our product, the hybrid joint 3LII-350 for bridge expansion devices, has passed the fatigue and waterproof tests specified by NEXCO. This product is classified as a "product joint" under NEXCO's classification, with an allowable expansion amount of 350mm and a maximum applicable gap amount of 730mm. Previously, the largest product joint available for use by NEXCO had an allowable expansion amount of 230mm and a maximum applicable gap amount of 415mm, so with this certification, our product is now the largest (according to our research).

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Durability 100 years, expansion device, hybrid joint, 3LII type.
Bridge expansion device proven to last 100 years! No replacement needed for new bridges for 100 years! Long-term water-tightness, maintenance-free [NEXCO specification compliant product].

**Features** 1) Ultra-long durability of 100 years: Proven durability of 100 years by achieving 12 million cycles in fatigue loading tests conducted by a third-party organization. 2) Long-term water-tightness of 50 years: Proven water-tightness equivalent to 50 years through water-tightness performance tests conducted by a third-party organization. Secondary water-stop materials are standard specifications. 3) Large expansion and contraction capacity for wide gaps: One of the largest expansion capacities among NEXCO-approved products. Capable of accommodating expansion from 150mm to 350mm, with a maximum gap of 730mm for floor slabs. 4) Ultra-low noise and vibration-free: A vertical integrated structure with 32mm thick steel plates arranged vertically and alternately, making it difficult for air vibrations to transmit under the beams, thereby reducing noise. Smooth and comfortable driving experience. The small wheel load support interval minimizes impact vibrations during travel. 5) Easy to install: Can be constructed without road closures by regulating lane usage on one side, applicable for both new installations and repairs. Lighter compared to conventional large products. 6) Maintenance-free: The load support plate and anchor plate are designed as a vertical integrated structure with high durability. Additionally, the structure prevents damage from metal fatigue, allowing for visual maintenance management. Visual inspections are sufficient, eliminating the need for regulated sound inspections. 7) NETIS registered: This new technology is registered in the Ministry of Land, Infrastructure, Transport and Tourism's database system "NETIS." Registration No. KT-210067-A.