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  6. Expandable device Hybrid joint Durability 100 years 3LII type

Expandable device Hybrid joint Durability 100 years 3LII type

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3LII-150, 160, 200, 250, 300, 350, 400, 450, 500

last updated:Apr 24, 2026

クリテック工業 本社、大阪営業所
クリテック工業 本社、大阪営業所
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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 inspections, 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)

    Bridge MaterialsFoundation construction
橋梁新聞_250101号_クリテック工業_広告_ol_イプロス用_1000-1000.jpg

Expandable device Hybrid joint Durability 100 years 3LII type

橋梁新聞_250101号_クリテック工業_広告_ol_イプロス用_1000-1000.jpg
橋梁新聞_250101号_クリテック工業_広告_ol_イプロス用_1000-1000.jpg 3L?タイプ 550-550.jpg 3L?タイプ 550-550 宇治川大橋.jpg 3L?タイプ 飛越大橋 002.jpg 3L?タイプ 沢内橋.jpg 3L?タイプ 新地きずな橋 01.jpg 3L?タイプ 550-550 3L?施工.jpg 3L?タイプ 布志名高架橋.jpg 3L?タイプ 新地きずな橋 02.jpg
  • Critic Industrial (Media Information) published an article in the Bridge Newspaper titled "Proving 100-Year Durability through Fatigue Testing." President Wakabayashi was interviewed about the 100-year durability expansion device.
  • Special site - Product/service details - https://pr.www.ipros.com/cretec/product/

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basic information

【Features】 1. Ultra-long durability of 100 years: Achieved 12 million cycles in fatigue load testing by a third-party organization. 2. Long-term water tightness of 50 years: Proven water tightness equivalent to 50 years. Secondary water stop material is standard specification. 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 installation: Can be installed with lane restrictions on one side. 【Our Strengths】 Crittec Industries is a comprehensive manufacturer of bridge expansion devices, handling everything from research, design, manufacturing, sales, to construction in-house. We provide products tailored to customer needs and contribute to the longevity of bridges.

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Delivery Time

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※Around 90 days (the delivery time may vary depending on the quantity, so please contact us for details).

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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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(6)

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Durability 100 Years "Hybrid Joint Type 3LII" Catalog

Durability 100 Years "Hybrid Joint Type 3LII" Catalog

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Crittec Industrial NEXCO Specification Hybrid Joint Catalog

Crittec Industrial NEXCO Specification Hybrid Joint Catalog

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Japan's first! 100-year durability "Hybrid Joint Type 3LII" catalog

Japan's first! 100-year durability "Hybrid Joint Type 3LII" catalog

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Expansion Device [Hybrid Joint] Comprehensive Catalog

Expansion Device [Hybrid Joint] Comprehensive Catalog

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[Expansion Device] Hybrid Joint <3LIIA Type> Catalog

[Expansion Device] Hybrid Joint <3LIIA Type> Catalog

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8 Reasons to Choose _Hybrid Joint_ Lineup Catalog

8 Reasons to Choose _Hybrid Joint_ Lineup Catalog

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News about this product(5)

Recruitment for Ambassadors of the 100-Year Bridge Project

Recruitment of Ambassadors (a few positions available) for the "100-Year Bridge Project," which promotes the charm of civil engineering and bridges together.

  • Company news

The bridge expansion device manufacturer, Crittec Co., Ltd., is seeking a few ambassadors for the "100-Year Bridge Project," who are interested in the civil engineering and bridge fields and can share their appeal and social issues through social media. This initiative aims to raise awareness about the current state of aging social infrastructure and the importance of maintenance and management. We welcome individuals with interest or knowledge in civil engineering and bridges as ambassadors to collaboratively plan, create, and disseminate content, thereby promoting understanding and revitalization of social infrastructure as a whole. Would you like to share the interesting aspects and importance of social infrastructure through your perspective and creative activities? We welcome those who are engaged in creative activities or information dissemination related to civil engineering and social infrastructure, as well as those who wish to take on new challenges. The number of followers does not matter. Your "likes" and "messages" may connect to the future of social infrastructure. Please feel free to apply.

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On the Ken-O Expressway, a 100-year durable hybrid joint type 3LII was installed. Left: After the removal of the existing joint, Right: Completion of the installation of type 3LII.

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.

  • Company news

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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At the Shinjin Excellent Company Award Ceremony, a certificate of commendation was presented. (From left) Hiroyuki Shibata, Chairman of the Shinkin Central Bank, Wakabayashi, President and Representative Director of our company, and Ishido, Executive Officer and Head of the Technology Department of our company.

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.

  • Company news

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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February 26 issue, Sankei Shimbun, Tohoku 6 Prefectures edition, newspaper advertisement

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.

  • Company news

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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Company information

クリテック工業

クリテック工業 本社、大阪営業所

Building materials, supplies and fixtures manufacturers

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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.

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