Durable 100-Year Expansion Device for Bridges, Type 3LII
A newly constructed bridge requires no replacement for 100 years! Long-term water resistance, maintenance-free.
In the longevity of bridges, the durability of expansion joints is a very important factor. Replacing expansion joints requires significant costs and traffic regulations, which can reduce the operational efficiency of bridges. The Hybrid Joint Type 3LII achieves a durability of 100 years, contributing to cost reduction and improved safety from a long-term perspective. 【Application Scenarios】 - New bridges - Repairs of existing bridges - Highways * For general roads, there is the "Hybrid Joint Type 3LIIA." 【Benefits of Implementation】 - Reduction in lifecycle costs due to no need for replacement for 100 years - Maintenance-free, eliminating the need for sound inspections and ultrasonic tests, reducing maintenance costs - Decreased frequency of traffic regulations, mitigating traffic congestion and noise damage, and enhancing safety - Adoption of new technology through NETIS registration (No. KT-210067-A)
basic information
【Features】 1. Ultra-long durability of 100 years: Achieved 12 million cycles in fatigue loading tests by a third-party organization. 2. Long-term water-tightness of 50 years: Proven water-tightness equivalent to 50 years. Secondary water-tight materials are standard specifications. 3. Accommodates large expansion and wide gaps: One of the largest expansion capacities among NEXCO-approved products. 4. Ultra-low noise and vibration-free: Reduces noise with a vertical integrated structure. 5. Easy to install: Installation possible with lane restrictions on one side. 【Our Strengths】 Crittec Industries is a comprehensive manufacturer of bridge expansion devices, conducting everything from research, design, manufacturing, sales, to construction in-house. We provide products tailored to customer needs and contribute to the longevity of bridges.
Price range
Delivery Time
Model number/Brand name
3LII-150, 160, 200, 250, 300, 350, 400, 450, 500
Applications/Examples of results
NEXCO, the Ministry of Land, Infrastructure, Transport and Tourism, urban expressways, and various public organizations, including local governments, have adopted this product widely across the country. This product has passed the water stop test and durability test conducted by NEXCO.
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Line up(9)
| Model number | overview |
|---|---|
| 3LII-150 | Expansion amount 150mm (±75mm) |
| 3LII-160 | Expansion amount 160mm (±80mm) |
| 3LII-200 | Expansion amount 200mm (±100mm) |
| 3LII-250 | Expansion amount 250mm (±125mm) |
| 3LII-300 | Expansion amount 300mm (±150mm) |
| 3LII-350 | Expansion amount 350mm (±175mm) |
| 3LII-400 | Expansion and contraction amount 400mm (±200mm) |
| 3LII-450 | Expansion amount 450mm (±225mm) |
| 3LII-500 | Expansion amount 500mm (±250mm) |
catalog(5)
Download All CatalogsNews about this product(4)
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The replacement work of the expansion joints on the Tomei Expressway (Yokohama area) has been completed without any accidents. The large-scale project was successfully carried out with a consistent system and track record in investigation, design, manufacturing, sales, and construction.
The replacement work for the expansion joints on the Tomei Expressway (Yokohama section) has been successfully completed, and the completion inspection was finished on April 9, 2026. This project, which we undertook as the main contractor, is the largest scale project our company has ever handled (with a construction period of about one and a half years). Crittec Industries, as a manufacturer of expansion joints for bridges, handles everything from research, design, manufacturing, and sales to construction in a consistent manner. In this project, we leveraged our on-site adjustment capabilities, technical skills, and a network of multi-skilled personnel to achieve smooth construction. Furthermore, due to the trust and experience we have built up over the years with numerous construction achievements in the challenging infrastructure environment of the Tomei Expressway since our founding, we successfully completed this project as the main contractor. Our flagship product, the "Hybrid Joint," is characterized by long-term durability and high water-tightness, and it has been adopted in many bridges. We would like to express our deep gratitude to the client, Central Nippon Expressway Company Limited, our partner companies, and the local residents.
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Crittec Industries receives the "Shinkin Central Bank Chairman's Award" at the Shinkin Excellent Company Awards - Selected for high evaluation of its 100-year durability bridge expansion devices and social contribution activities.
Crittec Industries, a manufacturer of expansion devices for bridges, received the "Chairman's Award of the Shinkin Central Bank" at the "2026 Shinkin Excellent Company Awards" held on March 16, 2026. This award is a system that selects outstanding companies from among the business partners of 23 Shinkin banks in Tokyo. Our company was nominated as a representative of approximately 20,000 business partners of Shiba Shinkin Bank and received the award after a rigorous screening process. The development of the bridge expansion device "Hybrid Joint Type 3LII," which achieves a durability of 100 years, was highly evaluated for its contribution to reducing maintenance costs through lower replacement frequency, as well as its role in mitigating social costs such as traffic regulations. Additionally, our social contribution activities, including the utilization of senior talent, promotion of health management, and the implementation of the experiential learning program "Crittec Academy" for elementary school students, were also comprehensively recognized. With this award as a catalyst, our company will strive for technological innovation and quality improvement aimed at realizing sustainable social infrastructure and creating further value.
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On February 26, 2026, an advertisement for the bridge expansion device "Hybrid Joint" was published in the Tohoku 6 Prefectures edition of the Sankei Shimbun, demonstrating a durability of 100 years (3LII type) verified by a third-party organization.
Crittec Industries Co., Ltd. published a newspaper advertisement (black and white, full-page 15 columns) for the bridge expansion device "Hybrid Joint" in the February 26, 2026 issue of the Sankei Shimbun Tohoku 6 Prefectures edition. In Japan, the number of bridges over 50 years old is rapidly increasing, making the longevity of bridges a critical issue. The expansion devices, which are considered a cause of bridge damage, require high water-tightness and long-term durability. Our expansion device "Hybrid Joint" offers multiple types tailored to different bridge types and conditions. Among them, the "Hybrid Joint 3LII type" has demonstrated a durability of 100 years in fatigue loading tests conducted by a third-party organization. It has successfully passed 12 million cycles of repeated loading at a maximum load of 260 kN, confirming performance equivalent to a 100-year design service life for bridges. We have numerous delivery records in the six Tohoku prefectures and can accommodate a wide range of bridge types, including steel and PC bridges. The special website linked to the advertisement allows for the review of detailed materials and inquiries or requests for documents. Please make use of it for comparing and considering bridge renewal and repair plans. Crittec Industries will continue to contribute to the longevity of bridges nationwide, starting with the Tohoku region.
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[Published in the January 1, 2026 issue of Bridge News] "Hybrid Joint Type 3LII" adopted for Meishin Concentrated Construction! Introduced as an advanced example of large finger joint replacement.
Recently, an article about Crittec Industries' construction achievements was published in the January 1, 2026 issue of the Bridge News. The article highlights a case where, during the concentrated construction of the Meishin Expressway conducted in November 2025, a large finger joint was replaced with our "Hybrid Joint Type 3LII." The background for receiving this construction order was a similar replacement project carried out in 2024 within the jurisdiction of the Kyoto Expressway Office of NEXCO West Japan's Kansai Branch. This construction is noted as the first case in the Kansai Branch area where a large finger joint was replaced with a product joint, and the high evaluation of this achievement led to its adoption in the concentrated construction of the Meishin Expressway. Replacing large finger joints with product joints is a field with few precedents and high technical difficulty, leading many companies to hesitate in responding. In this context, our Hybrid Joint Type 3LII, which possesses reliable technical capabilities and construction achievements, was selected. For any inquiries regarding expansion devices, please consult Crittec Industries.
Distributors
CRETEC, a company under Crittec Industries, was born from the combination of Create (creation) and Technology. As a comprehensive manufacturer of bridge expansion devices, we continue to develop expansion devices that contribute to the longevity of bridges and environmental protection. Moreover, we do not stop at product manufacturing; by consistently handling everything from research, design, manufacturing, sales, to construction in-house, we can manufacture and install expansion devices that meet the requests of our clients and general contractors, as well as the conditions and environments of the bridges and roads on-site. We also take into account the issues that arise during the installation of expansion devices and the damage conditions of existing devices that are removed, using this information to improve and develop our products. Please feel free to contact us for inquiries about bridge expansion devices, requests for materials, or estimates. ◆ What is a bridge expansion device? It is a component installed in the gap between the bridge abutment and the bridge girder, or between bridge girders. When designing a bridge, it is necessary to create a gap to prevent the bridge girders from colliding due to expansion and contraction caused by temperature changes. The bridge expansion device is required to cover this gap and ensure safe passage for vehicles and pedestrians.















