<Media Information> An article titled "Proving 100 Years of Durability" has been published in Bridge Communication.

クリテック工業本社、大阪営業所、福岡営業所

The article "Proving 100 Years of Durability" was published in the March 1, 2025 issue of "Bridge Communication." *The full article is available in the related PDF document. Please download and read it. We encourage you to take a look!* <Excerpt from the article> Crittec Industries announced that its main product, the expansion joint "Hybrid Joint 3LII-500," has been proven to have a durability of 100 years through fatigue loading tests conducted by a third-party organization. The 3LII type meets NEXCO specifications. The load support plate and anchor plate are designed as a vertical integrated structure, providing high durability and preventing damage from metal fatigue. In October to November 2024, using a fatigue testing machine at the Construction Machinery Construction Association's Comprehensive Research Institute, a third-party organization, it cleared a maximum loading weight of 260 kN for 12 million cycles. This is based on the assumption that a 25-ton large vehicle ran over the 3LII-500 for 12 million times, equivalent to a 100-year durability. According to the "Road Bridge Design Guidelines," the standard design service life for bridges is 100 years. For newly constructed bridges, there is no need to replace the expansion joints for 100 years. The 3LII type is maintenance-free, eliminating the need for traffic restrictions for sound inspections, thereby reducing maintenance costs and improving safety.

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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.
Expandable device "Hybrid Joint 3LIIA type (with guide plate)"
By shaping the steel plate into a guide plate type, it prevents damage to the main body of the grader due to expansion and contraction in snowy areas.

【Features】 ○ Large expansion and contraction capacity, suitable for wide spans ○ Compatible with all types of bridges ○ Ultra-low noise and comfortable driving ○ Long-term durability and maintenance-free ○ High watertightness ○ Safe and easy installation (product height is low and relatively lightweight) ○ Replaceable ○ Economical ● For more details, please contact us or request a catalog.