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  3. クリテック工業 本社、大阪営業所
  4. Ten years since the Kumamoto earthquake - The "Hybrid Joint LL Type" expansion device adopted for the new Aso Ohashi Bridge, designed to accommodate fault displacement.
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  • Apr 16, 2026
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Apr 16, 2026

Ten years since the Kumamoto earthquake - The "Hybrid Joint LL Type" expansion device adopted for the new Aso Ohashi Bridge, designed to accommodate fault displacement.

クリテック工業 クリテック工業 本社、大阪営業所
The main shock of the Kumamoto earthquake that occurred in the early hours of April 16, 2016, caused the Aso Ohashi Bridge to collapse, significantly impacting local transportation. Following recovery efforts, the New Aso Ohashi Bridge was opened in 2021. In the New Aso Ohashi Bridge, structures that can accommodate future fault displacements have been incorporated, such as the use of a steel simple box girder bridge over the fault. Additionally, the expansion joints installed at the bridge's seams are designed to follow fault displacements. Our bridge expansion joint, the "Hybrid Joint LL Type," has been adopted for this New Aso Ohashi Bridge, contributing to the safety and functionality of the bridge while accommodating large displacements. Japan is a country prone to earthquakes, and bridge design requires ensuring safety against Level 1 seismic motion (earthquakes occurring during the service period) and Level 2 seismic motion (maximum class earthquakes). Moving forward, our company will continue to provide technologies that support the safety and security of social infrastructure.
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Kritec Industries | Instagram
Ten years since the Kumamoto earthquake. The new Aso Ohashi Bridge, which opened in 2021, has adopted the hybrid joint LL type. A country that lives with earthquakes, Japan. Invisible technology protects lives.
Kritec Industries | News | Ipros
Notice of specification changes and expansion of application conditions for "Hybrid Joint LL Type"
Kritech Industries | Homepage | Product Information
Introducing the "Hybrid Joint LL Type" and products of the same type.

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イプロス画像_耐久性50年_240229_LL_001.jpg

The "Hybrid Joint," a flexible device that has proven long-term durability and high water resistance.

Proven durability of 50 or 100 years through fatigue load testing!

The Hybrid Joint NS-LL type and 3LIIA type have been tested under the fatigue durability test specified by NEXCO, confirming a durability of 50 years after 6 million load cycles. Furthermore, the 3LIIA type will undergo another fatigue loading test in November 2024. After 12 million load cycles, a durability of 100 years has been confirmed! This proves its ultra-long-term durability. Traditionally, expansion joints are often required to have a durability of around 30 years, but bridges are expected to last 100 years, so it is undeniable that expansion joints can shorten the lifespan of bridges. Our product, the Hybrid Joint, contributes to extending the lifespan of the expansion joint itself, thereby reducing lifecycle costs and promoting the longevity of bridges. We offer a wide range of products from small to large, accommodating expansion amounts from 20mm to 600mm. 【NS-LL Type Features】 ○ 50 years of durability and water-tightness ○ Ultra-low noise and low vibration ○ Steel vertical shape 【3LIIA Type Features】 ○ 100 years of durability ○ 50 years of water-tightness ○ Large expansion amount and wide gap For more details, please contact us or request a catalog.

  • Foundation construction

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S・L・LLタイプ設置写真.jpg

Hybrid Joint NS-LL Type: A Stretchable Device with Excellent Water Stopping Properties

The adhesion between the steel plate and rubber was confirmed to have no delamination in the tensile test!

The Hybrid Joint NS-LL type is manufactured using the press vulcanization bonding technology, which is also used in the production of bearings. Regarding the bonding part, it has been confirmed through a tensile test by the Chemical Substance Evaluation Research Organization that the failure mode was material failure rather than cohesive failure, meaning there was no delamination. This indicates that the steel plate and rubber are bonded very strongly, making it a product with excellent water-tightness. In addition to the strong adhesive force between the rubber and the steel plate, the structure is designed so that the water-stopping rubber does not come into direct contact with the tires of passing vehicles, making it less prone to wear. The range of products available includes both small and large items, accommodating expansion amounts from 20mm to 175mm and a maximum applicable slab gap of 395mm. **Features** - High water-tightness - Steel vertical tooth shape - One-lane assembly product ~~ We are currently seeking agents! Agents from the Tohoku and Hokuriku regions are very welcome! Of course, we also accommodate companies from other regions! ~~ For more details, please contact us or request a catalog.

  • Foundation construction
  • Dam construction

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S・L・LLタイプ設置写真.jpg

Expansion device "Hybrid Joint NS-LL Type"

[Agents Wanted] The connection points between joints are factory vulcanized and bonded, achieving very high water resistance.

Crittec Industries Co., Ltd. has continued to develop expansion devices for bridges that are environmentally friendly and contribute to environmental protection, fulfilling its responsibilities as a comprehensive manufacturer of expansion devices for road bridges. We will continue to adhere to this policy, conducting all development, design, and manufacturing processes in-house to create products that meet our customers' needs. Additionally, Crittec Industries Co., Ltd. often takes responsibility not only for product sales but also for installation work, striving to improve products by considering issues that arise during installation and the condition of removed existing expansion devices. Our product lineup is extensive, ranging from small to large products, capable of accommodating expansion amounts from 20mm to 175mm and a maximum slab gap of 395mm. 【Features】 ○ High watertightness ○ Steel vertical tooth shape ○ One-lane assembly product ~~ We are currently seeking agents! Agents from the Tohoku and Hokuriku regions are very welcome! Of course, we also accommodate companies from other regions! ~~ For more details, please contact us or request a catalog.

  • Foundation construction
  • Dam construction

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Expansion device "Hybrid Joint NS~LL Type (with guide plate)"

By installing the guide board, it prevents damage to the main body by the grader in snowy areas.

The hybrid joint is a non-drainage expansion device developed using a composite technology of rubber and steel materials, achieving very high water-tightness by press vulcanizing and bonding steel plates and rubber. Furthermore, by adopting a steel vertical shape for the load-bearing structure, the surface exposure area has been minimized, improving sound insulation and durability. The range of products available includes both small and large items, accommodating expansion amounts from 20mm to 175mm, and a maximum applicable slab gap of 395mm. 【Features】 ○ High water-tightness ○ Steel vertical tooth shape ○ One-lane assembly product ~~ Currently seeking agents; agents from the Tohoku and Hokuriku regions are very welcome! Of course, we can also accommodate companies from other regions! ~~ For more details, please contact us or request a catalog.

  • Joints between components

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Expansion device "Hybrid Joint"

[NETIS Registered Product] A bridge expansion device with high water stop performance, comfortable driving, and ultra-low noise.

This is a bridge expansion device adopted nationwide, primarily by the Ministry of Land, Infrastructure, Transport and Tourism, NEXCO, urban expressways, local governments, and other public organizations. 【Features (excerpt)】 ◆ Compatible with small to large bridges Handles expansion amounts from 20mm to 600mm, with a maximum gap of 1230mm. Other specifications can be designed separately. ◆ Usable for all types of bridges Can be used for all types of bridges, including steel bridges, PC bridges, RC bridges, as well as arch bridges and curved bridges. ◆ High water-tightness "NS-LL type": The steel plate and sealing rubber are bonded using a mold (press vulcanization bonding), preventing separation between the steel plate and rubber. ◆ Safe and easy installation Can be installed using a 4-ton unic crane without the need for large machinery like medium to large rough terrain cranes, allowing for safe and easy (speed-up) construction. Here’s a brief introduction to some installation examples! ~~ At the Tochigi Prefecture Nikko Civil Engineering Office (Maruyama Bridge), a "Hybrid Joint" was used for renovation work. * NS-LL type repair ~~ At the Kinki Regional Development Bureau Kinokawa River National Road Office (Takasegawa Bridge), it was used for a newly constructed bridge. * 3L type For more details, please contact us or download the catalog.

  • Road signs and road accessories
  • Foundation construction

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Related catalog(5)

Expansion Device 【Hybrid Joint】 Load Support Type LL Type Catalog

Expansion Device 【Hybrid Joint】 Load Support Type LL Type Catalog

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[Expansion Device] Hybrid Joint <L Type> Catalog

[Expansion Device] Hybrid Joint <L Type> Catalog

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[Expansion Device] Hybrid Joint <S Type> Catalog

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8 Reasons to Choose _Hybrid Joint_ Lineup Catalog

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Expansion Device [Hybrid Joint] Comprehensive Catalog

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クリテック工業
Building materials, supplies and fixtures manufacturers
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クリテック工業 本社、大阪営業所
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CCS3 product photo

The new product "Vehicle Count Sensor CCS3" enables efficient occupancy management of large parking lots.

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Hotron Inc. has launched its new product, the "Vehicle Count Sensor CCS3"! This product is a ceiling-mounted sensor that combines infrared and radar technology. It reliably detects vehicles in both directions with a single unit, accommodating traffic during congestion and vehicle passing, thus achieving efficient occupancy management in large parking lots. Additionally, it can be utilized for exit warning purposes in addition to vehicle counting, contributing to the safe and smooth operation of parking facilities. 'Features' - Improved detection performance against changes in road surface during rainy weather by using both infrared and radar. - Equipped with IP67 waterproof and dustproof performance, making it effective even in salt damage areas. - Various settings can be configured from a dedicated app (for Android devices), with current settings easily visible at a glance. - The base dimensions are the same as the previous model "CCS2," allowing for smooth replacement of existing equipment. *For more details, please refer to the product information, catalog download, or contact us.*

Oct 30, 2026

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The rebar inspection AR system "BAIAS" has won the "2026 Good Design Award."

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GRIFFY Co., Ltd. (Headquarters: Chiyoda-ku, Tokyo, Representative Director Takuya Irizawa, hereinafter referred to as "GRIFFY") and Ecomott Co., Ltd. (Headquarters: Sapporo City, Hokkaido, Representative Director Takuya Irizawa, hereinafter referred to as "Ecomott") are pleased to announce that the iPad Pro application of their jointly developed rebar inspection AR system "BAIAS" has won the "2026 Good Design Award" organized by the Japan Design Promotion Association. This award recognizes the comprehensive redesign of the user interface (UI) and user experience (UX) conducted in July 2025. It was acknowledged that the system was redesigned to provide an experience that allows users, even those who have never encountered AR (augmented reality) technology, to proceed without confusion in the highly specialized task of rebar inspection at construction sites. ● Information on the Award Exhibition The award-winning entry will be exhibited at the "GOOD DESIGN EXHIBITION 2026," which showcases all award-winning designs of the 2026 Good Design Award. Exhibition Period: October 31, 2026 (Saturday) to November 4, 2026 (Wednesday) Venue: Various locations in Tokyo Midtown (9-7-1 Akasaka, Minato-ku, Tokyo) Content: Exhibition of all award-winning designs of the 2026 Good Design Award.

Oct 28, 2026

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Release of the original song "Find B"!

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  • COMPANY

B Search Co., Ltd. has released the official music video (MV) for our original song "Find B - Brass Celebration -" which embodies our corporate philosophy and our passionate commitment to recruitment support on YouTube. Under the message, "Job advertisements are not just information. They are a door that can change someone's tomorrow," we express our stance of working together as a team to create encounters between companies facing recruitment activities and job seekers taking new steps, aiming for recruitment success. Through this completed original song, we deliver the vibrant company culture of B Search and our passionate dedication to recruitment. Please check out this captivating original song on the official B Search channel! ■ Here is the official music video (MV) for B Search's original song! Full MV: https://youtu.be/S2AyIe9t0_8 Short version: https://youtube.com/shorts/ZfSpGR0q1UM

Oct 28, 2026

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What is GX-ETS (Greenhouse Gas Emission Trading System)? Measures that companies should take after full-scale operation.

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As part of the promotion of GX (Green Transformation), the "GX-ETS (Emission Trading System)" is gaining attention. We provide an overview of GX-ETS, the background of its introduction, an explanation of its impact on companies upon full operation, and key points that companies will need to address in the future in our column on our website. If you are considering how to understand and reduce greenhouse gas emissions and respond to decarbonization management, please take a look at the related links.

Oct 28, 2026

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[Event] Exhibited at the Construction Technology Exhibition 2026 in Kinki. KF Logs

[Event] Exhibited at the Construction Technology Exhibition 2026 in Kinki.

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Held for two days at Intex Osaka. The "Construction Technology Exhibition 2026 Kinki" was held at Intex Osaka from October 28 (Wednesday) to 29 (Thursday), where our company also set up a corner at the Wakayama Prefecture booth featuring local products. We would appreciate it if you could check the details on our blog. (Link below)

Oct 28, 2026

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