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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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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 <LL Type> Catalog

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[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
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クリテック工業 本社、大阪営業所
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[Please introduce this to the management and general affairs department] Update on the introduction case of expense reimbursement and attendance management system! We want to eliminate paper-based reimbursement and application processes. The checking work that used to take three days can now be completed in one day.

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An article has been published regarding the case study of the introduction of the expense reimbursement system "Rakuraku Seisan" and the attendance management system "KING OF TIME" at Racam Co., Ltd. ~ In the case of Racam ~ Before the introduction of "Rakuraku Seisan," applications were paper-based. One person was responsible for checking the contents for about 100 individuals using a calculator. Since actually using the system, various tasks related to determining who to pay and how much have been reduced, and it has become possible to import the crucial journal entries. Most importantly, the elimination of the need to research transportation costs one by one has been a significant improvement. The successful implementation of the attendance management system was made possible by the generous support provided by iBP. [Case Overview (Partial)] ■ Challenges Before Implementation - Wanted to eliminate paper-based reimbursement and application processes ■ Key Points of Implementation - High recognition of Rakuraku Seisan - With iBP, both expense reimbursement and attendance management can be handled together *For more details, please refer to the related links or feel free to contact us.

Jul 24, 2026

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We will start selling various equipment related to expansion devices! We will do our utmost to reduce on-site hassle and support smooth construction.

  • NEW
  • COMPANY

We are pleased to announce that in response to customer requests for "no order for the main expansion device, but we would like to arrange necessary equipment for construction," we have started selling related accessories for expansion devices. We will deliver essential items for the site, such as tension anchors, sealing materials, cover plates, and urethane (backup materials), quickly and with high quality. Additionally, if there are materials not listed that you are having trouble sourcing or would like delivered together, please feel free to consult with us. 【Products Offered (Examples)】 ■ Tension Anchors ■ Sealing Materials ■ Cover Plates ■ Urethane (Backup Materials) *We are currently developing an online store, and once completed (date to be determined), we will also publish information on Ipros. *For more details, please feel free to contact us.

Jul 24, 2026

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Case Study 003: Verbalizing the "somewhat inconvenient" issues faced by HR and General Affairs. A case of organizing challenges and proposals. Client in the home care industry with approximately 700 employees.

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"Somewhat inconvenient" can quickly transform into "cost" and "risk" due to an increase in the number of employees or an expansion of business scope. What we are introducing this time is the process of a home care industry company with around 700 employees verbalizing their frustrations regarding payroll operations and considering the optimal system configuration. When we verbalize "somewhat inconvenient"... 1) The support quality of the payroll system being used is poor, causing significant stress. 2) The number of employees has been on the rise in recent years, raising concerns about running costs due to the pay-per-use system. 3) Macros are being used for data integration with a separate system. 4) We want to make backend processes like payroll payment reports easier. Information from iBP What is important here is to decide how to handle the multiple issues that have arisen, which is the "prioritization of tasks." You can read more without needing to input personal information. Please visit the iBusiness Partners column page! https://ibp-column.sfsite.me/36302

Jul 23, 2026

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When the sensor detects a car, it notifies pedestrians of the car's departure with the light of a rotating beacon!

Perfect for entrances and exits of parking lots and stores! Notify pedestrians of vehicle departures with the light from the rotating lamp! Here is a proposal for a departure warning sensor!

  • NEW
  • CATALOG

[To the owners of parking lots and parking lot construction companies] "I am worried about the possibility of colliding with pedestrians when exiting the parking lot..." Among vehicle entrances to parking lots, stores, residences, and factories, those particularly facing sidewalks or roadways are expected to pose risks of dangerous incidents such as pedestrian collisions and vehicle-to-vehicle accidents. To alleviate such concerns, Hotron proposes a [Vehicle Exit Warning Sensor] that detects vehicle departures at various sites and alerts the surrounding area with LED lights and buzzers. The system consists of a simple configuration of "Sensor" + "Controller" + "Switching Power Supply (24V)" + "LED Rotating Light." *When using the exit warning system, we kindly ask that you arrange for the switching power supply (24V), LED rotating light, control panel, circuit breaker, etc. Since it can be retrofitted, it can also be used for existing parking lot entrances. [Contents Included] ○ Exit Warning System Configuration ○ Comparison Table of Exit Warning Sensors ○ Four Modes ○ Wide Range of Applications ○ Customer Feedback ○ Appearance Diagram / Specifications ◎ For more details, please contact us or download the catalog.

Jul 23, 2026

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[Free Catalog Distribution] Measures for "Near Misses" in Nursing and Care Settings. Prevent tripping and disconnection with codes! Wireless Series Bed Exit Sensors Linked to Nurse Call Systems.

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  • CATALOG

In facilities operating nurse call systems, we have made bed exit sensors wireless, allowing them to notify in conjunction with the nurse call system. By simply connecting the mat sensor "Foldable Thin Matt-kun," the body movement call "Ugo-kun," and the wheelchair body movement call "Ayumi-chan" to the transmitter HB-RS, you can make the bed exit sensor wireless. The infrared sensor "Just Place Pole-kun" has the transmitter HB-RS built-in. This helps prevent accidents caused by falls, slips, or wandering, contributing to the efficiency of medical operations. 【Features】 ○ Wireless conversion by simply connecting existing sensors to the transmitter HB-WSK. ○ Bed exit sensors notify wirelessly in conjunction with the nurse call system. ○ Up to 5 transmitters can be registered with one receiver. ○ The communication distance between the transmitter and receiver is approximately 10 meters. ◎ For more details, please contact us or download the catalog.

Jul 23, 2026

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