Bridge expansion and contraction device Product List and Ranking from 11 Manufacturers, Suppliers and Companies | IPROS

Last Updated： Aggregation Period:Mar 25, 2026～Apr 21, 2026
This ranking is based on the number of page views on our site.

Bridge expansion and contraction device Manufacturer, Suppliers and Company Rankings

Last Updated： Aggregation Period:Mar 25, 2026～Apr 21, 2026
This ranking is based on the number of page views on our site.

  1. クリテック工業 本社、大阪営業所、福岡営業所 Tokyo//Building materials, supplies and fixtures manufacturers
  2. 新日本構研 石狩センター Hokkaido//Other construction industries
  3. リノブリッジ 東京本社 Tokyo//Building materials, supplies and fixtures manufacturers
  4. 4 新潟ボンド工業 Niigata//Other construction industries
  5. 5 ショーボンド建設 本社 Tokyo//Building materials, supplies and fixtures manufacturers
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Bridge expansion and contraction device Product ranking

Last Updated： Aggregation Period:Mar 25, 2026～Apr 21, 2026
This ranking is based on the number of page views on our site.

  1. [Column] Structure of Bridges: Explanation of the Names and Roles of Each Component, and Types of Bridges クリテック工業 本社、大阪営業所、福岡営業所
  2. Bridge expansion device "Super Lead iG Joint" 新日本構研 石狩センター
  3. What should be recorded about the shape of the expansion and contraction device? クリテック工業 本社、大阪営業所、福岡営業所
  4. [Column] Construction Methods for Expansion Devices | Basic Procedures and Precautions for New Installations クリテック工業 本社、大阪営業所、福岡営業所
  5. 4 [Column] Replacement of Expansion Devices: Explanation of the Procedure and Three Important Points to Note クリテック工業 本社、大阪営業所、福岡営業所

Bridge expansion and contraction device Product List

1～30 item / All 59 items

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Expansion Device 【Hybrid Joint】 Construction Example Aomori Prefecture

Expansion Device 【Hybrid Joint】 Construction Example Aomori Prefecture

We would like to introduce a case study of the hybrid joint (3L type), a bridge expansion device that excels in water resistance and durability.

Crittec Co., Ltd. not only sells products but often takes responsibility for installation work as well. We strive to improve our products by considering the issues that arise during installation and the condition of the removed existing expansion devices. 【Construction Example】 ○ Location: Aomori Prefecture ○ Bridge Name: Nozomi Bridge ○ Product: 3L-250 ○ Comment: Since vehicles could not access the bridge, we performed the installation by lifting it with a crane from underneath the bridge. For more details, please contact us or request a catalog.

  • Bridge Materials
  • Bridge expansion and contraction device

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Expansion Device 【Hybrid Joint】 Construction Example Osaka Prefecture

Expansion Device 【Hybrid Joint】 Construction Example Osaka Prefecture

We would like to introduce a case study of the hybrid joint (CF type) for bridge expansion devices, which excels in water resistance and durability.

Crittec Industries Co., Ltd. not only sells products but often takes responsibility for installation work as well. We strive to improve our products by considering the issues that arise during installation and the damage conditions of the removed existing expansion devices. 【Construction Case】 ○ Construction Location: Osaka Prefecture ○ Bridge Name: Dainichi Elevated Bridge ○ Product: CF-80 and others ○ Comment: This is the installation of the NEXCO specification CF-80 type. One of its features is that it has a larger applicable gap compared to products from other manufacturers. For more details, please contact us or request a catalog.

  • Bridge Materials
  • Bridge expansion and contraction device

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Basic Knowledge of Expansion Devices "Classification in Structures" <Free Materials Provided>

Basic Knowledge of Expansion Devices "Classification in Structures" <Free Materials Provided>

Explaining the key points for selecting bridge joints! Technical materials are available as a gift!

We are currently offering technical materials from Crittec Industries Co., Ltd. titled "Expansion Device Explanation Series - Structure of Expansion Devices." This includes an introduction to the classification of structures, their respective features, and the locations where they are used, along with illustrations. [Contents] ■ Classification of Structures ■ Features of Butt Joint Type ■ Features of Load Support Type *For more details, please refer to the catalog. Feel free to contact us with any inquiries.

  • Bridge Materials
  • Bridge expansion and contraction device

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Expansion Device 【Hybrid Joint】 Construction Example Shizuoka Prefecture

Expansion Device 【Hybrid Joint】 Construction Example Shizuoka Prefecture

We would like to introduce a case study of the hybrid joint (CF type) for bridge expansion devices, which excels in water resistance and durability.

Critic Co., Ltd. not only sells products but often takes responsibility for installation work as well. We strive to improve our products by considering the issues that arise during installation and the damage conditions of the existing expansion devices that are removed. 【Construction Case】 ○ Location: Shizuoka Prefecture ○ Bridge Name: Mabushigawa Bridge ○ Product: CF-80 and others ○ Comment: This was a replacement work for expansion devices during the slab thickening construction. We paid particular attention to the scattering of sparks during welding.

  • Bridge Materials
  • Bridge expansion and contraction device

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Expansion Device 【Hybrid Joint】 Construction Example Gunma Prefecture

Expansion Device 【Hybrid Joint】 Construction Example Gunma Prefecture

We would like to introduce examples of construction for hybrid joints (NS to LL type) for bridges, which excel in water resistance and durability.

Critic Industrial Co., Ltd. not only sells products but often takes responsibility for installation work as well. We strive to improve our products by considering the issues that arise during installation and the condition of the removed existing expansion devices. 【Construction Case】 ○ Location: Gunma Prefecture ○ Bridge Name: Sawarimori Bridge ○ Product: S-30 and others ○ Comments: Due to the narrow width, we conducted the work with a road closure. Additionally, we performed repairs as the concrete in the foundation area was deteriorated. For more details, please contact us or request a catalog.

  • Bridge Materials
  • Bridge expansion and contraction device

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Expansion Device 【Hybrid Joint】 Construction Example Tokyo, Eitai Bridge

Expansion Device 【Hybrid Joint】 Construction Example Tokyo, Eitai Bridge

We would like to introduce a case study of the hybrid joint (NS to LL type) for bridge expansion devices, which excels in water resistance and durability.

Crittec Co., Ltd. not only sells products but often takes full responsibility for installation work as well. We strive to improve our products by considering the issues that arise during installation and the condition of the removed existing expansion devices. 【Construction Case】 ○ Location: Tokyo ○ Bridge Name: Eitai Bridge ○ Product: L-100 and others ○ Comment: Eitai Bridge is Japan's first iron bridge and was the first bridge to exceed a span length of 100 meters as a road bridge. Due to its historical significance, it was selected as one of the "First Civil Engineering Heritage" by the Japan Society of Civil Engineers in 2000, along with Kiyosu Bridge. Additionally, in 2007, it became the first road bridge designated as an Important Cultural Property (building) by the national government. For more details, please contact us or request a catalog.

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  • Bridge Materials
  • Bridge expansion and contraction device

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Expansion Device Hybrid Joint [Construction Example Saitama Prefecture]

Expansion Device Hybrid Joint [Construction Example Saitama Prefecture]

We would like to introduce examples of construction for hybrid joints (NS to LL type) for bridges, which excel in water resistance and durability.

Critic Industrial Co., Ltd. not only sells products but often takes full responsibility for installation work as well. We strive to improve our products by considering the issues that arise during installation and the condition of the removed existing expansion devices. 【Construction Case】 ○ Location: Saitama Prefecture ○ Bridge Name: Nail-less Bridge Mounted Elevated Bridge ○ Product: S-50 and others ○ Comment: The noise issue of the existing expansion device was the reason for the replacement, so we paid special attention to the height and quality during installation. For more details, please contact us or request a catalog.

  • Joints between components
  • Bridge expansion and contraction device

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Expansion Device Hybrid Joint [Construction Example, Chiba Prefecture]

Expansion Device Hybrid Joint [Construction Example, Chiba Prefecture]

We will introduce examples of the construction of hybrid joints (NS to LL type) for bridges, which excel in water resistance and durability.

Critic Industrial Co., Ltd. not only sells products but often takes responsibility for installation work as well. We strive to improve our products by considering the issues that arise during installation and the condition of the removed existing expansion devices. 【Construction Case】 ○ Location: Chiba Prefecture ○ Bridge Name: Heisei Bridge ○ Products: NS-20 and others ○ Comments: Due to the bridge's proximity to the coast, we conducted the work while confirming the corrosion of rebar and the deterioration of concrete caused by salt damage. For more details, please contact us or request a catalog.

  • Joints between components
  • Bridge expansion and contraction device

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Bridge Expansion Device Hybrid Joint <Free Materials Available>

Bridge Expansion Device Hybrid Joint <Free Materials Available>

Supports various types of bridges, with numerous achievements nationwide! High water resistance, long-term durability of 50 years, and easy installation.

The "Hybrid Joint" is a high-performance waterproof structure for bridge expansion devices, made by press vulcanizing and bonding rubber and steel. Due to its small surface exposure, it reduces impact during vehicle passage and prevents slipping even in rain or snow. The vertical structure of the load-bearing support prevents damage from metal fatigue, achieving a long-term durability of 50 years and maintenance-free operation. 【Features】 ■ Compatible with various types of bridges, including steel bridges, PC bridges, RC bridges, cable-stayed bridges, and curved bridges. ■ Can be installed with a 4-ton crane truck, allowing for safe and easy construction in a short time. ■ Can be replaced in short lengths for each lane. ■ Widely adopted by public organizations across the country, including the Ministry of Land, Infrastructure, Transport and Tourism, NEXCO, urban expressways, and local governments. *Currently, we are offering a product catalog for download. Please take a look.

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  • Bridge Materials
  • Bridge expansion and contraction device

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Expansion Device Hybrid Joint [Construction Example, Yamanashi Prefecture]

Expansion Device Hybrid Joint [Construction Example, Yamanashi Prefecture]

We will introduce examples of the construction of hybrid joints (NS to LL type) for bridges, which excel in water resistance and durability.

Critic Co., Ltd. not only sells products but often takes responsibility for installation work as well. We strive to improve our products by considering the issues that arise during installation and the condition of the removed existing expansion devices. 【Construction Case】 ○ Location: Yamanashi Prefecture ○ Bridge Name: Yamatani Bridge ○ Product: NS-20 and others ○ Comment: The site was in a peaceful mountainous area with almost no passing vehicles, allowing for safe execution. For more details, please contact us or request a catalog.

  • Joints between components
  • Bridge expansion and contraction device

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Expansion Device Hybrid Joint [Construction Example Tochigi Prefecture]

Expansion Device Hybrid Joint [Construction Example Tochigi Prefecture]

We would like to introduce a case study of the hybrid joint (NS-LL type) for bridges, which excels in water resistance and durability.

Crittec Industries Co., Ltd. not only sells products but often takes responsibility for installation work as well. We strive to improve our products by considering the issues that arise during installation and the damage conditions of the removed existing expansion joints. 【Construction Example】 - Location: Tochigi Prefecture - Bridge Name: Koinuma Bridge - Product: NS-20 - Comment: Since the existing joint was of the slide type, we conducted thorough protection under the girder. For more details, please contact us or request a catalog.

  • Joints between components
  • Bridge expansion and contraction device

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Expansion Device Hybrid Joint [Construction Example, Iwate Prefecture]

Expansion Device Hybrid Joint [Construction Example, Iwate Prefecture]

We would like to introduce a case study of the hybrid joint (CF type) for bridge expansion devices, which excels in water resistance and durability.

Crittec Co., Ltd. not only sells products but often takes responsibility for installation work as well. We strive to improve our products by considering the issues that arise during installation and the condition of the removed existing expansion devices. 【Construction Examples】 ○ Construction Location: Iwate Prefecture ○ Bridge Name: Kamishibukawa Bridge ○ Products: CF-80 and others ○ Comments: This is the installation of the NEXCO specification CF-30 type. We adopted a product with a guide plate type as a countermeasure against graders. For more details, please contact us or request a catalog.

  • Joints between components
  • Bridge expansion and contraction device

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Expandable Device Hybrid Joint Construction Examples Included (Free Materials Provided)

Expandable Device Hybrid Joint Construction Examples Included (Free Materials Provided)

We are offering a comprehensive catalog introducing our hybrid joints with a long-term durability of 50 years for free!

We are currently offering a comprehensive catalog (excerpt version) that clearly introduces the bridge expansion device "Hybrid Joint," which accommodates various types of bridges, for free. It is compatible with various bridge types, including steel bridges, PC bridges, RC bridges, as well as cable-stayed and curved bridges, featuring a high-performance waterproof structure that combines rubber and steel through press vulcanization bonding. Due to its small surface exposure, it generates less impact during vehicle passage, resulting in reduced noise and vibration. Its compact size allows for installation using a 4-ton unic crane, enabling safe, easy, and quick construction. 【Features】 ■ Compatible with various bridge types such as steel bridges, PC bridges, RC bridges, cable-stayed bridges, and curved bridges ■ Ultra-low noise and vibration-free ■ High waterproof performance ■ Long-term durability of 50 years ■ Ease of installation *For more details, please refer to the PDF document or feel free to contact us. *The PDF document is a digest version. If you would like the complete catalog, please contact us.

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  • Bridge Materials
  • Bridge expansion and contraction device

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Check before installing the expansion device! What is 'pre-compression' of the expansion device?

Check before installing the expansion device! What is 'pre-compression' of the expansion device?

Detailed information on "the purpose of preliminary compression," "calculation methods," and "unnecessary cases" is provided!

Before installing the expansion joint, in many cases, the manufacturer calculates and sets the width for installation. Depending on the manufacturer, this may be referred to as "pre-compression" or "installation adjustment." What is the purpose of this? Expansion Joint Navi explains the purpose and calculation details. For more information, please refer to the related link. 【Contents】 ■ Purpose of pre-compression ■ Calculation method for pre-compression ■ Cases where pre-compression is unnecessary ■ Summary * For more details, please check the related link page or feel free to contact us.

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  • Bridge expansion and contraction device

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Is under-beam curing necessary for expansion devices? How to do it? Introduction based on site conditions!

Is under-beam curing necessary for expansion devices? How to do it? Introduction based on site conditions!

Introducing measures for work from below and splash prevention from the sides, tailored to the conditions of the site and construction!

When installing expansion joints, there are times when "under-beam protection" is required. However, there is often a lack of information on how to do this, which can be quite troublesome. At Expansion Joint Navi, we explain under-beam protection based on different site conditions. For more details, please check the related link. 【Contents】 ■ Why is under-beam protection necessary? ■ A comprehensive introduction to methods of under-beam protection! ■ Summary *For more details, please refer to the related link page or feel free to contact us.

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What should be recorded about the shape of the expansion and contraction device?

What should be recorded about the shape of the expansion and contraction device?

Explanation of the shape management items in the expansion device construction, such as installation height and surface irregularities!

In many cases, the required quality control items for contractors are mainly "installation height," "surface irregularities," and "finish height." In the Expansion Device Navi, we explain each of the quality control items related to expansion devices. For more details, please refer to the related link page. [Contents] ■ Installation Height ■ Surface Irregularities ■ Finish Height *For more details, please refer to the related link page or feel free to contact us.

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No more worries about construction management! 10 key points for replacing expansion joints!

No more worries about construction management! 10 key points for replacing expansion joints!

Here are 10 key points for replacing expansion devices! We encourage those in design and estimation roles to take a look.

Many people might think, "I rarely deal with niche construction types like expansion joints, and I don't understand the construction process!" At Expansion Joint Navi, we provide ten key points necessary for managing the installation of expansion joints, aimed at those struggling with construction management. We also touch on cost and scheduling aspects that are useful for estimation, so we encourage design and estimation personnel to check out the related link page. [Contents] - List of Key Points - Individual Explanations *For more details, please refer to the related link page or feel free to contact us.

  • Manufacturing Equipment
  • Bridge expansion and contraction device

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【Expansion Device】Noise issues from the expansion device! What is the cause? What is the inspection method?

【Expansion Device】Noise issues from the expansion device! What is the cause? What is the inspection method?

A clear explanation of the damage caused by noise and the causes of noise generation! We will also introduce inspection methods.

Have you ever heard a "thud" sound coming from above when passing under a bridge? It might be the sound of a vehicle passing over an expansion joint. When the sound is small, people tend not to pay much attention to it, but when it becomes loud, it can be a significant source of stress for those living nearby. At Expansion Joint Navi, we provide information on "causes of noise generation," "noise countermeasures," and "inspection methods," among other topics. For more details, please visit the related link page. 【Contents】 ■ Damage caused by noise ■ Causes of noise generation ■ About noise countermeasures ■ About inspection methods ■ Summary *For more details, please refer to the related link page or feel free to contact us.

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Expansion device automatic selection tool - Select expansion devices regardless of the manufacturer!

Expansion device automatic selection tool - Select expansion devices regardless of the manufacturer!

Introduction of a tool that allows for easy product selection by inputting "stretch amount" and "play interval."

This document introduces the "Automatic Selection Tool for Expansion and Contraction Devices." By entering the "expansion amount" and "gap" for the location where you want to install the expansion and contraction device, you can easily select the appropriate product. If you are struggling with thoughts like, "I think there might be a more suitable product, but I don't have time to research..." please feel free to use this tool. 【Contents】 ■ What is the Automatic Selection Tool ■ How to Use the Automatic Selection Tool *For more details, please refer to the PDF document or feel free to contact us.

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  • Other Software
  • Bridge expansion and contraction device

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Metropolitan Expressway Approved! Expansion Device 'Hybrid Joint CS Type'

Metropolitan Expressway Approved! Expansion Device 'Hybrid Joint CS Type'

A new adoption has been decided for the steel deck slabs of the metropolitan expressway! It contributes to excellent water resistance and improved durability as a pioneering product.

The bridge expansion device "Hybrid Joint CS Type" has passed water-tightness and durability tests according to the specifications of the Metropolitan Expressway. It has been decided to be newly adopted by the Metropolitan Expressway Company. As a result, the CS Type has become a pioneering approved product for the steel deck slabs of the Metropolitan Expressway. 【Features】 ■ Dedicated for steel deck slab installation ■ Compatible with single-sided and double-sided steel deck slabs ■ Excellent water-tightness ■ Improved durability ■ Ultra-low noise *For more details, please refer to the catalog. Feel free to contact us with any inquiries.

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  • Bridge Materials
  • Bridge expansion and contraction device

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[Column] What is an expansion device? Explaining its role in bridges and highways.

[Column] What is an expansion device? Explaining its role in bridges and highways.

We are explaining what role the expansion and contraction device plays!

An expansion joint is a device used to fill the gaps found in bridges and highways. If there are gaps in a bridge, it can cause issues when vehicles pass over it, so these joints are installed to cover the gaps and allow for a comfortable passage. However, although they are referred to as coverings, they are not simply metal plates that cover the gaps. There are other roles that an expansion joint is required to fulfill, and manufacturers produce and handle products that meet the necessary quality and functionality. This article explains the roles that expansion joints play. It also summarizes the types of expansion joints and manufacturers, so by reading it, you should gain a general understanding of the topic. *For detailed information, please refer to the related links. Feel free to contact us for more information.*

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  • Manufacturing Equipment
  • Bridge expansion and contraction device

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[Column] What is a Hybrid Joint? Introducing 7 Features and Product Examples

[Column] What is a Hybrid Joint? Introducing 7 Features and Product Examples

Introducing features and product examples with photos! Please use this as a reference when choosing a telescopic device.

The hybrid joint is an expansion device manufactured by our company. Expansion devices vary in performance and elasticity depending on their type, so it is necessary to choose one based on the bridge or road where it will be installed. However, the hybrid joint can be used in any location and has high durability, allowing for long-term use. In this article, we will introduce the features of the hybrid joint along with product examples and photos. Please use this as a reference when selecting an expansion device. *For detailed information in the column, please refer to the related links. For more information, feel free to contact us.

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[Column] Foundations of Bridges: Types and Characteristics, Explanation of Their Usage Ratios

[Column] Foundations of Bridges: Types and Characteristics, Explanation of Their Usage Ratios

Explanation of the main types of bridge foundations: shallow foundations, pile foundations, and caisson foundations.

At the base of the abutments and piers, foundations are established to transfer the load of the bridge to the ground. The foundations are classified into three types based on their construction, each with distinct characteristics. This article explains the types and features of bridge foundations. Additionally, we have summarized the usage ratios of each foundation and their trends, so please use this information as knowledge about bridges. *For detailed content of the column, you can view it through the related links. For more information, please feel free to contact us.*

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  • Bridge Materials
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[Column] What is a steel deck? Key points for installing expansion devices explained.

[Column] What is a steel deck? Key points for installing expansion devices explained.

Explanation of the structure and features of the expansion device for steel deck plates, as well as the advantages and disadvantages of steel deck plates!

Steel deck plates have the advantage of being able to lighten the bridge girders themselves. Additionally, they are valued for their ability to significantly shorten construction periods, but care must be taken when installing expansion devices. This article explains the characteristics of steel deck plates and the key points for installing expansion devices. We also introduce expansion devices that can be used with steel deck plates, so please refer to this as a guide for selecting devices. *For detailed content of the column, you can view it through the related links. For more information, please feel free to contact us.

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  • Bridge Materials
  • Bridge Construction
  • Bridge expansion and contraction device

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[Column] Replacement of Expansion Devices: Explanation of the Procedure and Three Important Points to Note

[Column] Replacement of Expansion Devices: Explanation of the Procedure and Three Important Points to Note

Explaining the differences between replacing and newly installing a telescopic device! Summarized the flow and key points related to replacement.

The replacement of expansion joints requires thorough on-site investigation and construction tailored to the situation. Since the construction time is limited to one day, schedule management is also very important. Additionally, there are many points to consider that differ from new installations, such as the height of the installation and the area of concrete removal. This article summarizes the flow and key points related to the replacement of expansion joints. Please refer to it as preliminary knowledge before the construction. *For detailed content of the column, you can view it through the related links. For more information, please feel free to contact us.*

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  • Bridge Materials
  • Bridge Construction
  • Bridge expansion and contraction device

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Expansion device "NLH/NTH/DFH type" cold region compatible type, for Hokkaido.

Expansion device "NLH/NTH/DFH type" cold region compatible type, for Hokkaido.

Investigating the causes of deterioration and damage to expansion devices in cold snowy regions! Development aimed at extending lifespan and achieving high LCC evaluation.

Our company has investigated the current state of damage to expansion joints in snowy and cold regions, focusing on the causes of damage and their characteristics, and has developed cold-region-compatible expansion joints. We have established a dust-proof layer in the device's gap section to prevent clogging by soil and debris, and installed internal steel plates beneath the dust-proof layer to resist the compressive forces of packed snow, thereby protecting the waterproof layer. In addition to the built-in temporary waterproofing material, we have standardly equipped the device with secondary waterproofing material aimed at long-term waterproofing, ensuring a structure that does not cause water leakage. 【Features】 ■ Anti-corrosion treatment... To prevent corrosion of steel materials due to freezing agents and rainwater, a high corrosion-resistant treatment of "aluminum-magnesium alloy thermal spraying" has been applied to the entire surface of the steel. ■ Protection of waterproofing material... A dust-proof layer has been established in the gap section of the expansion joint to prevent clogging by soil and debris, and internal steel plates have been installed beneath the dust-proof layer to resist the compressive forces of packed snow, thereby protecting the waterproof layer. Additionally, in conjunction with the built-in primary waterproofing material, we have standardly equipped the device with secondary waterproofing material aimed at long-term waterproofing, ensuring a structure that does not cause water leakage. ■ Snow removal measures... A snow plow guide plate compliant with the specifications of the Hokkaido Development Bureau has been installed. *For more details, please download the PDF or feel free to contact us.

  • NLHNTHDFH型_02.jpg
  • Bridge Materials
  • Bridge expansion and contraction device

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Bridge expansion device "FC Finger Joint"

Bridge expansion device "FC Finger Joint"

This is a bridge expansion device that supports the long lifespan of bridges!

The "FC Finger Joint" is a bridge expansion device that can support the long lifespan of bridges. It protects the waterproofing material, which is essential for non-drainage functionality, and prevents early deterioration of the bridge girder ends in snowy and cold regions. The structure features a steel finger joint with an added fin cover to reduce compressive forces, designed with consideration for the workability during regular inspections from below the bridge and during the replacement of waterproofing materials after the bridge has been put into service. 【Features】 ■ Supports the long lifespan of bridges ■ Suppresses deterioration and functional decline of waterproofing materials ■ Equipped with a fin cover *For more details, please contact us or download the catalog.

  • Joints between components
  • Reinforcement and repair materials
  • Bridge expansion and contraction device

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Bridge expansion device "Super Lead iG Joint"

Bridge expansion device "Super Lead iG Joint"

Innovative expansion devices for bridges that extensively incorporate new mechanisms.

The "Super Lead iG Joint" is a bridge expansion device that appropriately responds to various design specifications and basic functions of bridges. This product inherits previous technologies and experiences, developing and implementing a soundproof shock-absorbing device (SSIA) that buffers and absorbs sound transmission energy and impact energy from wheel loads, which could not be resolved by the displacement lead rubber layer alone. Additionally, it pursues excellent workability and improves the reliability of construction sites. 【Features】 ■ Wide adaptability ■ Excellent cost-effectiveness ■ Good water-tightness ■ High sound insulation ■ Outstanding running performance *For more details, please refer to the catalog or feel free to contact us.

  • Bridge Materials
  • Bridge expansion and contraction device

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MM Joint DS Type

MM Joint DS Type

High durability and simple embedded joints Innovative bridge expansion device

The MM-JOINT DS type is a simple and highly durable bridge expansion device composed of a special binder, DS aggregate as the main material, along with a primer, back rod, and gap plate. In January 2026, it obtained the "VE" evaluation from NETIS.

  • Bridge Construction
  • Bridge expansion and contraction device

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Bridge expansion device "AI Joint"

Bridge expansion device "AI Joint"

Many advantages with a 65mm high joint! Steel joint for load support within pavement thickness.

The "AI Joint" is a load-supporting steel expansion device that can be installed within the pavement without the need to remove the existing slab. With a joint height of 65mm, it reduces industrial waste generated from chipping work and shortens the time required for chipping and traffic restrictions. Additionally, we offer a type compatible with snow plow guidance plates for cold regions. 【Features】 ■ Reduced risk of damage ■ Noise reduction ■ Environmental measures ■ Snow removal measures *For more details, please refer to the PDF document or feel free to contact us.

  • Secondary paving products
  • Pavement construction
  • Foundation construction
  • Bridge expansion and contraction device

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