クリテック工業 List of Products and Services

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.

• Manufacturing Equipment
• others

The Hybrid Joint 3LIIA type, like the conventional Hybrid Joint 3L type, has a vertical integrated structure for the load support and anchor plate sections, resulting in high durability with almost no damage from metal fatigue. By using steel plates vertically, the exposed parts are minimized, leading to very low impact during operation, and making the product less prone to noise and vibration. It is capable of accommodating large expansion and contraction (200–600mm) and wide gaps (up to 1230mm), making it one of the largest products in the category of rubber-based joints (a general term for products other than finger joints and embedded joints). The main differences from the NEXCO specification 3LII type are that the secondary water stop material is not standard equipment (but can be installed separately) and that the painting specifications differ. The durability and water stop structure of the main body are equivalent to the NEXCO specifications. 【Features】 ○ Accommodates large expansion and contraction and wide gaps ○ High water stop performance due to the zipper structure ○ Long-term durability and maintenance-free For more details, please contact us or request a catalog.

• Foundation construction
• Dam construction

The "PS type" is a checker plate with a non-slip surface treatment. To ensure safety for pedestrians, a sliding mechanism is incorporated in the expansion joints. It employs press vulcanization adhesion, which excels in water resistance and durability. We offer a wide range of products including "PS-20," "PS-30," "PS-100," and "PS-250." 【Features】 ■ Non-slip prevention using checker plate ■ Sliding mechanism in expansion joints for pedestrian safety ■ Press vulcanization adhesion used for steel plates and water seal rubber ■ Improved durability of the adhesive surface at the water stop section *For more details, please refer to the PDF document or feel free to contact us.

• Steel
• Paving of sidewalks, roads, parking lots and stadiums
• Road signs and road accessories

The Hybrid Joint 3LII type has a vertical integrated structure of the load support plate and anchor plate, which provides high durability and prevents damage from metal fatigue. Its durability is ultra-long-term, lasting 100 years! It has been proven through fatigue loading tests conducted by a third-party organization, successfully clearing the equivalent of 12 million cycles, which corresponds to 100 years. This assumes that a 25-ton large vehicle has traveled over the 3LII type 12 million times, equating to a 100-year durability. The standard design supply period for bridges is 100 years. For newly constructed bridges, there is no need to replace the expansion devices for 100 years. The 3LII type is maintenance-free, eliminating the need for traffic regulation during sound inspections, leading to reduced maintenance costs and improved safety. It is a product capable of accommodating large expansion amounts (150–350mm) and wide gaps (up to 730mm), making it one of the largest among expansion devices that have passed NEXCO standards. It has been widely adopted on highways across the country as a product that meets NEXCO specifications. For more details, please contact us or request a catalog.

• Foundation construction
• Bridge Materials

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.

• Bridge Materials

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 condition of the removed existing expansion devices. 【Construction Case】 - Location: Fukuoka Prefecture - Bridge Name: Wakatō Bridge - Product: CS-125 - Comment: This was the installation of the CS-125, which is a steel deck type. Additionally, due to its large size and both sides being steel decks, the installation was carried out with caution. For more details, please contact us or request a catalog.

• Joints between components

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 damage conditions of the removed existing expansion devices. 【Construction Examples】 ○ Construction Location: Mie Prefecture ○ Bridge Name: Kumikawahara Bridge ○ Product: CS-50 and others ○ Comment: This is the installation of the CS-50, which is a steel deck type. For more details, please contact us or request a catalog.

• Joints between components

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

Crittec Industrial Co., Ltd. not only sells products but often takes responsibility for installation work as well. We strive to improve our products by considering issues that arise during installation and the condition of existing expansion devices that are removed. 【Construction Example】 - Location: Miyazaki Prefecture - Bridge Name: Yamazumi Koyagawa Bridge - Product: LL-125 - Comment: This is a new construction project. Care was taken to ensure that the surface coloring material was applied evenly. For more details, please contact us or request a catalog.

• Joints between components

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

Crittec Co., Ltd. not only sells products but often takes responsibility for installation work as well. We strive to improve our products by considering issues that arise during installation and the condition of existing expansion devices that have been removed. 【Construction Case】 - Location: Ehime Prefecture - Bridge Name: Oshima Bridge - Product: 3L-300 - Comment: Since work had to stop when boats passed under the bridge, we conducted the installation with a supervisor present. It was impressive to see many cyclists stopping on the bridge to take photos of the scenery visible from there. For more details, please contact us or request a catalog.

• Joints between components

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

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.

• Bridge Materials

Critic Co., Ltd. not only sells products but also often takes responsibility for installation work, striving to improve products by considering issues that arise during installation and the condition of damaged existing expansion joints that have been removed. 【Construction Case】 ○ Location: Kanagawa Prefecture ○ Bridge Name: Otake Bridge ○ Product: S-40 and others ○ Comments: The existing joint was of the slide type, and the replacement was carried out after painting and paving had already been completed. The thickness of the deck slab is approximately 200mm, so care was taken not to remove the slab during chipping and excavation, as well as during the installation of reinforcing anchors, and protective measures were taken to avoid damaging the pavement and paint. Additionally, since it is a living road used for commuting and walking, restrictions were implemented with the assistance of guides for partial regulation. For more details, please contact us or request a catalog.

• Joints between components

Crittec Industries 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 Example】 ○ Location: Kyoto Prefecture ○ Bridge Name: Asahi Elevated Bridge ○ Product: CF-80 and others ○ Comment: This is the installation of the NEXCO specification CF-80 type. The work was carried out with a complete road closure during concentrated construction. Measures were taken, such as preparing a tent, due to the forecast of rain. For more details, please contact us or request a catalog.

• Joints between components

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

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

Crittec Industries 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 Example】 - Construction Location: Ibaraki Prefecture - Bridge Name: Fujimi Bridge - Product: L-60 and others - Comment: We also made calls for the safety of nearby residents and pedestrians. For more details, please contact us or request a catalog.

• Joints between components

Crittec Industrial Co., Ltd. not only sells products but often takes responsibility for installation work as well. We strive to improve our products by considering issues that arise during installation and the condition of existing expansion joints that are removed. 【Construction Case】 - Location: Yamagata Prefecture - Bridge Name: Haguro Bridge - Product: L-70 and others - Comment: Since it is an area with heavy snowfall, we covered the joint with a blue tarp for curing in preparation for concrete pouring the next day. For more details, please contact us or request a catalog.

• Joints between components

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 Case】 ○ Location: Tokyo ○ Bridge Name: Eitai Bridge ○ Product: L-100 and others ○ Comment: Eitai Bridge is Japan's first iron bridge and the first road bridge to exceed a span length of 100 meters. 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.

• Joints between components

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】 ○ Location: Gunma Prefecture ○ Bridge Name: Sawarimori Bridge ○ Product: S-30 and others ○ Comment: 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 deteriorating. For more details, please contact us or request a catalog.

• Joints between components

Crittec Co., Ltd. not only sells products but often takes responsibility for installation work as well. We strive to improve our products by considering issues that arise during installation and the condition of existing expansion joints that are removed. 【Construction Example】 ○ Location: Wakayama Prefecture ○ Bridge Name: Takasegawa Bridge ○ Product: 3L-400 ○ Comment: Due to the heavy weight of the product and the windy conditions at the high-altitude site, we exercised utmost caution when lifting with a crane from below the girder and during installation. For more details, please contact us or request a catalog.

• Joints between components

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

• Bridge Materials

We are currently offering technical materials from Crittec Industries Co., Ltd. titled "Expansion Device Explanation Series - Types of Expansion Devices." This includes a classification of structures and introduces the characteristics of each with illustrations. [Contents] ■ What is a finger joint? ■ What is a buried joint? ■ Others *For more details, please refer to the catalog. Feel free to contact us with any inquiries.

• Bridge Materials

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

The "CF type" is a bridge expansion device that employs a waterproof structure using elastic seals. Its tooth-shaped design minimizes shocks during travel and reduces noise. Due to factory assembly, it allows for shorter construction time, improved ease of installation, and cost reduction. It is a product that complies with the NEXCO standards revised in July 2011. There is also a snow pressure-resistant product called the "NCF type." 【Features】 - High waterproof performance due to elastic seals - Low noise for comfortable travel - Reduced construction time - Cost reduction - Compliance with NEXCO standards - Basic specifications include a secondary waterproofing material attachment type For more details, please refer to the catalog. Feel free to contact us with any inquiries.

• Bridge Materials

The "NCS-40" is a bridge expansion device that is bonded using press vulcanization of rubber and steel plates. Its uneven shape in the gap area enhances durability and achieves ultra-low noise, making it suitable for wide slab gaps. The standard length is 1.8m, and it can be adjusted on-site to accommodate the standard length and ends according to the width. 【Features】 ■ Press vulcanization bonding of rubber and steel plates ■ Excellent water resistance ■ Improved durability ■ Ultra-low noise *For more details, please refer to the catalog. Feel free to contact us with any inquiries.

• Bridge Materials

The "CS-50" is a bridge expansion device that bonds rubber and steel plates through press vulcanization. It exhibits excellent water-stopping performance. The steel vertical uneven shape enhances durability and achieves ultra-low noise, making it suitable for wide-span floor slabs. 【Features】 ■ Press vulcanization bonding of rubber and steel plates ■ Excellent water-stopping performance ■ Improved durability ■ Ultra-low noise ■ Compatible with steel floor slabs *For more details, please refer to the catalog. Feel free to contact us with any inquiries.

• Bridge Materials

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 characteristics is that it has a larger applicable gap compared to products from other manufacturers. For more details, please contact us or request a catalog.

• Joints between components

Crittec 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 damage conditions 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.

• Joints between components

Crittec Co., Ltd. not only sells products but often takes responsibility for installation work as well, striving to improve products by considering issues that arise during installation and the condition of removed existing expansion devices. 【Construction Case】 - Location: Tokyo - Bridge Name: Suijin Ohashi Elevated Bridge - Products: NS-20 and others - Comments: Prime contractor work. Noise reduction sheets were installed, and noise control measures were implemented. CS-50 (single-sided steel deck type) was also used. For more details, please contact us or request a catalog.

• Joints between components

The Hybrid Joint CF type features a tooth-shaped design that smoothly transmits the movement of wheel loads on its surface, and its structure is designed to minimize noise and vibration by absorbing shocks from unevenness. The water-stopping structure, made of elastic sealing material and rubber, offers high water resistance, and since standard products are assembled and delivered at the factory for installation, the likelihood of water leakage from connection points is low. 【Features】 ○ High water resistance ○ Low noise for comfortable driving ○ Complies with NEXCO standards For more details, please contact us or request a catalog.

• Joints between components

The Hybrid Joint 3LIIA type has a vertical integrated structure for the load support and anchor plate sections, making it highly durable with almost no damage from metal fatigue. By using steel plates vertically, the exposed areas are minimized, resulting in very low impact during operation and making the product less prone to noise and vibration. It is capable of accommodating large expansion and contraction (200–600mm) and wide gaps (up to 1230mm). 【Features】 ○ Supports large expansion and contraction and wide gaps ○ High watertightness due to double sealing structure ○ Long-term durability and maintenance-free For more details, please contact us or request a catalog.

• Joints between components

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

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

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.

• Foundation construction
• Road signs and road accessories

The Hybrid Joint 3LIIA type has a vertical integrated structure for the load support section and the anchor plate section, making it highly durable, with almost no damage from metal fatigue. By using steel plates vertically, the exposed parts are minimized, resulting in very low impact during operation, and the product is less likely to generate noise and vibration. It is capable of accommodating large expansion and contraction (200–600mm) and wide spacing (up to 1230mm). 【Features】 ○ Supports large expansion and contraction and wide spacing ○ High watertightness due to double waterproof structure ○ Long-term durability and maintenance-free For more details, please contact us or request a catalog.

• Foundation construction
• Dam construction

The hybrid joint is a non-drainage expansion device developed using a composite technology of rubber and steel, achieving very high water-stopping performance by press vulcanizing and bonding steel plates and rubber. Additionally, by adopting a steel vertical shape for the load-bearing structure, the surface exposure area is minimized, enhancing sound insulation and durability. The range of products available includes both small and large items, capable of accommodating expansion amounts from 20mm to 175mm and a maximum slab gap of 395mm. 【Features】 ○ High water-stopping performance ○ Steel vertical tooth shape ○ One-lane assembly product For more details, please contact us or request a catalog.

• Foundation construction
• Dam construction

A bridge expansion device is something that is installed in the gaps (expansion gaps) between the bridge abutment and the bridge girder, or between bridge girders. When designing a bridge, it is necessary to provide expansion gaps to prevent the bridge girders from colliding with the bridge abutments or with each other due to thermal expansion and contraction caused by temperature changes. To cover these gaps and ensure safe passage for vehicles and pedestrians, a bridge expansion device is required. The role of the expansion device is to fill the gaps, but it is not sufficient to only fulfill that requirement. Consideration must also be given to the safe passage of vehicles and economic aspects, with specific functions including the following: 【Functions Generally Required of Expansion Devices】 - No noise during travel - No impact during travel - Long-term usability - No leakage under the girder - Simple construction - Easy and low-cost maintenance - Low cost of the device itself Our hybrid joint has eight major features that meet the required functions: - Compatible with small bridges to long-span bridges - Usable for all types of bridges - Ultra-low noise and comfortable travel - Long-term durability and maintenance-free - High water-tightness - Safe and easy construction - Replaceable - Economical

• Foundation construction