コムテック List of Products and Services

We would like to introduce our GRP box girder bridge (VI method). Using the power of vacuum to inject resin into the fiberglass layer, the "VI method" ensures that the resin permeates thoroughly, creating a uniform and robust laminated material for the production of various parts (deck, side panels, girders, bottom plates, and bridge panels). To prevent any degradation of the laminated material's strength due to influences such as ultraviolet rays, water, or temperature changes, the bridge body is completely painted, aiming for easy maintenance. 【Functional Characteristics of the GRP Box Girder Bridge (VI Method)】 - Lightweight, allowing for consideration of utilizing existing foundations. - Long-term use with simple maintenance, enabling a reduction in maintenance costs. - The shape of the mold can be designed, allowing for the creation of elegantly curved girders. *For more details, please refer to the PDF materials or feel free to contact us.

• Bridge Construction

We introduce bridges and walkways made of "FRP (Fiber Reinforced Plastic)," which excels in strength, lightweight properties, and corrosion resistance. The weight of FRP is about 1/4 that of steel, allowing for reduced foundation construction costs and transportation expenses. It can be manually transported and constructed in locations such as mountainous areas where construction machinery cannot be used. It is resistant to corrosion from rain, wind, and salt damage, demonstrating excellent durability even in harsh environments, contributing to reduced lifecycle costs. FRP bridges and walkways can also be effective against salt damage from coastal areas as well as from de-icing agents! 【Four Features】 1. Reinforced with materials like glass fiber, it is lighter and stronger compared to conventional structural materials. 2. Resistant to salt and moisture, it does not corrode. 3. Capable of suppressing deterioration from UV rays and wind, it has good weather resistance. 4. Can be painted to match the surrounding colors, harmonizing with the natural environment. *You can view a catalog featuring numerous construction examples from the "Download" section.

• Civil Engineering Method
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The weight of FRP (fiber-reinforced plastic) is about 1/4 that of steel, making it lightweight and capable of reducing foundation construction costs and transportation expenses. It can be manually transported and installed in remote locations where heavy machinery cannot access. Additionally, it contributes to reducing lifecycle costs. It is resistant to corrosion from rain, wind, and salt damage, demonstrating excellent durability even in harsh environments, and can create pathways in various locations such as coastal areas, underwater, and mountainous regions. 【Four Features】 1. Reinforced with fiberglass and other materials, it is lighter and stronger compared to conventional structural materials! 2. Resistant to salt damage and water, it does not corrode. 3. It can suppress deterioration from UV rays and wind, providing good weather resistance. 4. With options for surface coating and shape, it offers good aesthetic appeal. *You can view a catalog featuring numerous construction examples from the "Download" section.

• Civil Engineering Method
• Ground foundation construction method
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The FRP BRIDGE is a bridge made of "FRP (Fiber Reinforced Plastic)," which excels in strength, lightweight properties, and corrosion resistance. Its weight is about 1/4 that of steel, allowing for a reduction in foundation construction costs and transportation expenses. It can be manually transported and constructed in remote areas where heavy machinery cannot access. It is resistant to corrosion from rain, wind, and salt damage, demonstrating excellent durability even in harsh environments, contributing to reduced lifecycle costs. 【Four Features】 1. Being reinforced with materials like glass fiber, it is lighter and stronger compared to conventional structural materials. 2. It is resistant to salt damage and water, preventing corrosion. 3. It can suppress deterioration from UV rays and wind, providing good weather resistance. 4. The surface coating and shape can be selected, enhancing aesthetic appeal. 【Construction Examples】 - Locations in harsh environments such as coastal areas - Places where installation can only be done manually (areas inaccessible to heavy machinery or cranes) - Locations that prioritize aesthetics to harmonize with nature *You can view a catalog featuring numerous construction examples from the "Download" section.

• Civil Engineering Method
• Ground foundation construction method
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The "Pin Foundation" is a simple foundation construction method that provides support by driving pins at an angle through a fixed block. It is effective in foundations in areas where heavy machinery cannot easily access, such as in forests, as it does not require large excavation work on the ground surface. By increasing the embedment depth of the pins, it can also accommodate soft ground conditions such as marshy or sandy soils. 【Features】 ■ Suitable for foundations of small structures like boardwalks, Yatsuhashi bridges, and pavilions ■ No ground excavation required for heavy machinery access, making it environmentally friendly ■ Two types of construction methods available based on application ■ Registered with NETIS *You can view a catalog with numerous construction examples from the "Download" section.

• Civil Engineering Method
• Ground foundation construction method
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We would like to introduce the renovation case of the Yatsuhashi at Kurozaki Nagata Wetland Nature Park (Nagasaki City, Nagasaki Prefecture). Located in the northwestern coastal area of Nagasaki City, it is well-known as the best habitat for dragonflies in Japan. Due to the presence of dangerous areas caused by corrosion in the existing wooden Yatsuhashi, it has been renovated to improve accessibility and make it easier for visitors to stroll. FRP materials, which are resistant to salt damage and humidity, have been used, and additional walking paths have been constructed to enhance the convenience for local residents. 【Renovation Case】 ■ Scale: Partial renovation and expansion of Yatsuhashi ■ Materials Used - Structural Material: Imported wood → FRP - Flooring: Imported wood → FRP - Railing: Pin foundation method (for the expanded section) Our company is capable of making appropriate renovation proposals by combining various materials such as steel, aluminum alloy, GRP, recycled wood, and natural wood. For more details, please refer to our catalog or feel free to contact us.

• Other civil engineering works
• Other park materials
• Structural Materials

We would like to introduce the renovation case of the entire boardwalk at "Banna Lake (Ishigaki City, Okinawa)." Banna Lake, located within the vast Banna Park, is a pond formed by mountain water accumulation. There was a wooden deck for observing lotus flowers and small creatures, but due to the harsh environment in Okinawa, it suffered from corrosion and required renovation. Durable and long-lasting FRP material was selected, and the floorboards were treated with a sand finish to prevent slipping caused by fallen leaves and moisture. 【Renovation Case】 ■ Scale: Entire boardwalk ■ Materials Used - Structural Material: Bongoshi wood → FRP - Floorboards: Bongoshi wood → FRP - Handrails: Bongoshi wood → FRP Our company is capable of providing appropriate renovation proposals by combining various materials such as steel, aluminum alloys, FRP, recycled wood, and natural wood. For more details, please refer to our catalog or feel free to contact us.

• Other civil engineering works
• Other park materials
• Structural Materials

We would like to introduce a renovation case of the "Kirishima Mountain Water Management Bridge, Tenkei Bridge (Kirishima City, Kagoshima Prefecture)." Located behind Kirishima Shrine, this gorge is stunning with fresh greenery in spring and beautiful autumn leaves. After 30 years since its construction, renovations were carried out due to aging and to improve convenience. FRP (Fiber Reinforced Plastic) decking and girders were used for their lightweight and high durability. 【Renovation Case】 ■ Scale: Suspension Bridge (Width 1.0 m × Length 27.4 m) ■ Materials Used - Structural Material: Cedar → FRP - Decking: Cedar → FRP - Handrail: Wire Rope → Wire Rope + Nylon Net Our company is capable of providing appropriate renovation proposals by combining various materials such as steel, aluminum alloy, FRP, recycled wood, and natural wood. For more details, please refer to our catalog or feel free to contact us.

• Other civil engineering works
• Other park materials
• Structural Materials

We would like to introduce a renovation case of the "Okinawa Prefectural Comprehensive Sports Park Connecting Bridge (Okinawa City, Okinawa Prefecture)." The handrail section of the bridge spanning the pond within the Okinawa Prefectural Comprehensive Sports Park had corroded, necessitating replacement work. Among various material comparisons, FRP (Fiber Reinforced Plastic) was chosen for its high durability against UV rays and salt damage, allowing for long-term use. It blends well with the surrounding landscape and is now cherished as a new bridge. 【Renovation Case】 ■ Renovation Details: Bridge Wooden Handrail Section ■ Materials Used - Handrail: Bongoshi wood → FRP Our company is capable of providing appropriate renovation proposals by combining various materials such as steel, aluminum alloys, FRP, recycled wood, and natural wood. For more details, please refer to our catalog or feel free to contact us.

• Other civil engineering works
• Other park materials
• Structural Materials

We would like to introduce a renovation case of the "Iwaya Park Heian Bridge (Minamikyushu City, Kagoshima Prefecture)." This is a replacement construction of a wooden bridge spanning the Manose River flowing through the park. There were several dangerous areas due to wood decay, and while repairs and replacements were considered, a lightweight FRP bridge was adopted, which places less burden on the foundation and allows for long-term use. 【Renovation Case】 ■ Renovation Details: Truss Bridge (Width 2.0m × Length 36.0m [2 spans]) ■ Materials Used - Structural Material: Cedar Laminated Wood → FRP VI Box Girder - Decking: Cedar → FRP - Handrail: Cedar → FRP Our company is capable of providing appropriate renovation proposals by combining various materials such as steel, aluminum alloy, FRP, recycled wood, and natural wood. For more details, please refer to our catalog or feel free to contact us.

• Other civil engineering works
• Other park materials
• Structural Materials

We would like to introduce the case of the wooden path renovation at "Banna Park Hotaru Falls Stairs (Ishigaki City, Okinawa)." Banna Park, located at an elevation of 230 meters on Mount Banna, is a nature-rich park just about a 10-minute drive from the city center. It is known as a famous spot for fireflies dancing in early summer. The observation path leading to the waterfall, where fireflies can be observed, had deteriorated due to the high temperature and humidity of the forest, prompting renovations. FRP materials, which can be used for a long time in harsh environments, were selected. 【Renovation Case】 ■ Renovation Details: Entire wooden path ■ Materials Used - Structural Material: Bongo wood → FRP - Floor Boards: Bongo wood → FRP - Handrails: Bongo wood → FRP Our company is capable of making appropriate renovation proposals by combining various materials such as steel, aluminum alloys, FRP, recycled wood, and natural wood. For more details, please refer to our catalog or feel free to contact us.

• Other civil engineering works
• Other park materials
• Structural Materials

We would like to introduce a case study of the renovation of three steel bridges at "Sendan Taki Falls (Yatsushiro City, Kumamoto Prefecture)." These bridges span a walking path that leads to a famous waterfall with a drop of 70 meters, located deep within the mountains of Gokasou. Due to the harsh climate, corrosion had progressed, necessitating a complete renovation. Access to the construction site was challenging due to the narrow road width and significant elevation changes, preventing the entry of construction vehicles and heavy machinery. As a result, manual transportation of materials and labor was required. Additionally, from the perspective of minimizing maintenance, FRP pull-out materials were utilized. To address the slippery floor surface caused by accumulated sediment and fallen leaves, as well as the splashing water from the falls, grating floor panels were used, enhancing the excitement of crossing the bridge. 【Renovation Case Study】 ■ Renovation Details: Three steel bridges (width 1.5m × length 16.3m, etc.) ■ Materials Used: - Structural Material: Steel → FRP - Floor Panels: Steel → FRP - Handrails: Steel → FRP Our company is capable of providing appropriate renovation proposals by combining various materials such as steel, aluminum alloys, FRP, recycled wood, and natural wood. For more details, please refer to our catalog or feel free to contact us.

• Other civil engineering works
• Other park materials
• Structural Materials

We would like to introduce a renovation case of the "Hiji Otaki Suspension Bridge (Kunigami Village, Okinawa Prefecture)." This suspension bridge leads to the largest waterfall on Okinawa Island, which has a drop of about 26 meters and is surrounded by a subtropical deep forest. Corrosion of components made from foreign wood, except for the towers and cables, has partially surfaced, prompting the need for renovation work. All wooden parts have been replaced with corrosion-resistant FRP materials, resulting in a structure that can be used for a long time. 【Renovation Case】 ■ Renovation Details: Suspension Bridge (Width 1.5m × Length 50.0m) ■ Materials Used - Structural Material: Ipe → FRP - Decking: Bongoshi → FRP - Handrail: Bongoshi → FRP Our company is capable of making appropriate renovation proposals by combining various materials such as steel, aluminum alloys, FRP, recycled wood, and natural wood. For more details, please refer to our catalog or feel free to contact us.

• Other civil engineering works
• Other park materials
• Structural Materials

We would like to introduce a case of renovation of the girder bridge in "Eda Funayama Kofun Park (Wamizu Town, Kumamoto Prefecture)." This pedestrian bridge is located within a park famous for the ancient burial mound where the first known example of kanji, the large sword, was excavated. The bridge, made of foreign timber, was renovated due to deterioration. The main girder was replaced with steel treated with hot-dip galvanization, and the flooring was replaced with cedar wood. It has become a bridge that allows for long-term use and easy maintenance. 【Renovation Case】 ■ Renovation Details: Girder Bridge (Width 2.5m × Length 14.5m) ■ Materials Used - Structural Material: Bongo wood → Steel girder - Flooring: Bongo wood → Cedar wood - Handrail: Teak wood → Reused Our company is capable of making appropriate renovation proposals by combining various materials such as steel, aluminum alloys, FRP, recycled wood, and natural wood. For more details, please refer to our catalog or feel free to contact us.

• Other civil engineering works
• Other park materials
• Structural Materials

We would like to introduce a renovation case of the "Nanayama Truss Bridge" (Karatsu City, Saga Prefecture), which was constructed using foreign timber along a walking course dotted with seven waterfalls and pools. The entire timber showed signs of decay, and we carried out reinforcement work considering both aesthetics and structural integrity. Boron-based insect and decay prevention agents (Impel Rod) were embedded in the decayed areas of the timber, and a protective wood coating was applied over the entire surface. Additionally, the main girder was reinforced with steel to enhance safety. 【Renovation Case】 ■ Renovation Details: Truss Bridge (Width: 2.5m × Length: 29.0m) ■ Materials Used - Structural Material: Bongo wood → Steel - Decking: Bongo wood → Repaired and reused - Handrail: Bongo wood → Repaired and reused Our company is capable of providing appropriate renovation proposals by combining various materials such as steel, aluminum alloys, FRP, recycled wood, and natural wood. For more details, please refer to our catalog or feel free to contact us.

• Other civil engineering works
• Other park materials
• Structural Materials

We would like to introduce the renovation case of the entire wooden path and truss bridge at "Banna Park (Ishigaki City, Okinawa)." This park, located at the foot of Mount Banna, features a vast area filled with a diverse range of subtropical plants and the only spring water pond on Ishigaki Island, surrounded by walking paths. Due to the high temperature and humidity, the existing wooden paths and bridges had deteriorated, and for the material selection in the renovation work, FRP materials with excellent corrosion resistance and salt damage resistance were adopted. 【Renovation Case】 ■ Renovation Details: Entire wooden path and truss bridge ■ Materials Used - Structural Material: Bongo wood → FRP - Decking: Bongo wood → FRP - Handrails: Bongo wood → FRP - Foundation: Pin foundation method (partially) Our company is capable of making appropriate renovation proposals by combining various materials such as steel, aluminum alloys, FRP, recycled wood, and natural wood. For more details, please refer to our catalog or feel free to contact us.

• Other civil engineering works
• Other park materials
• Structural Materials

We would like to introduce a case of renovation of the walking path at "Oishi Park (Naha City, Okinawa)." Due to the wooden stairs beginning to decay after a few years, they were renovated to durable, rot-resistant FRP stairs. Considering universal design, the renovation features wide handrails and non-slip flooring materials. The foundation utilizes the existing concrete independent foundation, with new pin foundation bases added only where necessary. 【Renovation Case】 ■ Renovation Details: Entire wooden path ■ Materials Used - Structural Material: Purple Heart → FRP - Flooring: Ipe → FRP - Railing: Yellow Balau → FRP - Foundation: Pin foundation method (partially) Our company is capable of making appropriate renovation proposals by combining various materials such as steel, aluminum alloys, FRP, recycled wood, and natural wood. For more details, please refer to our catalog or feel free to contact us.

• Other civil engineering works
• Other park materials
• Structural Materials

Places where other foundation methods are difficult We will introduce examples of the pin foundation method. Due to weak ground, there are sites where foundation work becomes extensive, sites where draining water from ponds or canals incurs significant costs, or sites where transporting materials is very labor-intensive. In such cases, the lightweight pin foundation method, which can be constructed manually, is optimal. Depending on the case, it is also possible to significantly reduce the cost of foundation work. 【Examples】 ■ National Okinawa Memorial Park Ocean Expo Park (Okinawa Prefecture) ■ Structure: Effective width 2.0m, column pitch 3.0m ■ Materials used - Railing: FRP - Floorboard: FRP - Structural materials: Steel, FRP ■ Foundation type: DP-75, DP-100 *For more details, please refer to the catalog or feel free to contact us.

• Civil Engineering Method
• Ground foundation construction method
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A place to enjoy flowers such as cherry blossoms and plum blossoms. We will introduce examples of the pin foundation construction method. Even if you want to enjoy flowers like cherry blossoms and plum blossoms up close, when many people approach the trees, they can compact the soil, which may cause the trees to wither. When creating viewing decks or boardwalks, the pin foundation method does not risk damaging the tree roots or disturbing the soil. 【Examples】 ■ The Great Cherry Blossom of Isshikyo (Kumamoto Prefecture) ■ Structure: Effective width 2.7m, post spacing 2.5m ■ Materials used - Railing: Ipe wood - Decking: Ipe wood - Structural materials: Steel ■ Foundation type: DP-M, SP *For more details, please refer to the catalog or feel free to contact us.

• Civil Engineering Method
• Ground foundation construction method
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Locations where it is difficult to install a standard foundation, such as sandy ground, are introduced with examples of the pin foundation method. When installing a standard concrete foundation, excavation of the ground surface is necessary. However, in sandy areas, even if excavation is done, the sand tends to flow away, requiring a much larger excavation area compared to the size of the concrete foundation. In the case of the pin foundation method, it is very easy to install even on sandy ground, as it only involves driving pins through a stabilizing block. 【Example】 ■ Kushira Town Nakayama Pond Park (Kagoshima Prefecture) ■ Structure: Effective width 1.5m, column pitch 3.0m ■ Materials used ・Railing: Jatoba wood ・Decking: Ipe wood ・Structural materials: Bongossi wood, Angelim wood ■ Foundation type: SP *For more details, please refer to the catalog or feel free to contact us.

• Civil Engineering Method
• Ground foundation construction method
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A place where water cannot be drained We will introduce examples of the pin foundation method. In conventional methods, foundation work could not be done without draining water from wetlands or lakes, but with the pin foundation method, underwater construction can be carried out by divers in the existing state. 【Case Study】 ■ Chigoike Park (Miyazaki Prefecture) ■ Structure: Effective width 2.5m, pillar pitch 2.0m ■ Materials Used - Railing: Aluminum, cedar - Floorboard: Cedar - Structural materials: Aluminum alloy, greenheart wood ■ Foundation Type: DP-100 *For more details, please refer to the catalog or feel free to contact us.

• Civil Engineering Method
• Ground foundation construction method
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Examples of the pin foundation method in areas where conventional foundations are difficult to install, such as wetlands. In soft ground areas like wetlands or lake beds, traditional concrete foundations may not be suitable. However, with the pin foundation method, it is possible to drive the pins very deep, making it feasible to work with such weak ground. Additionally, since there is no need for concrete pouring, it can be easily constructed even when there is water on the surface. 【Case Studies】 ■ Hibikinada Biotope (Fukuoka Prefecture) ■ Structure: Effective width 1.5m, column pitch 3.0m ■ Materials Used - Handrail: FRP - Decking: Recycled wood - Structural materials: FRP ■ Foundation Type: DP-75, SP *For more details, please refer to the catalog or feel free to contact us.

• Civil Engineering Method
• Ground foundation construction method
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Introducing an example of the pin foundation method in locations where it is difficult to install a standard foundation on steep slopes. In the case of standard concrete foundations, the weight can lead to sliding issues on steep slopes, resulting in large-scale foundation work. However, with the pin foundation method, it is possible to achieve deep anchoring by using longer driven pins, allowing for the easy construction of effective foundations even on steep slopes. 【Example】 ■ Nishikaibashi Park (Nagasaki Prefecture) ■ Structure: Effective width 2.0m, column pitch 1.5m to 2.0m ■ Materials used: - Handrail: Ipe wood, Jatoba wood - Decking: Ipe wood - Structural materials: Aluminum alloy, Angelim wood, Ipe wood ■ Foundation type: DP-M For more details, please refer to the catalog or feel free to contact us.

• Civil Engineering Method
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We introduce "Hirado Port" in Nagasaki Prefecture as an example of the installation of "FRP handrails and fall prevention fences." This handrail is set up along the coastal promenade leading to the ferry terminal at Hirado Port. FRP materials, which are strong and resistant to salt damage, are used because waves can splash over during strong winds. 【Installation Example】 ■ Nagasaki Prefecture ■ Installed in March 2016 ■ H1.1m × L95.17m *For more details, please refer to the catalog or feel free to contact us.

• Other civil engineering works

We introduce a construction example of the "FRP Stair Deck" at Yahija Beach on Aguni Island, Okinawa Prefecture. This island is located about 60 km east of the main island of Okinawa, and we have developed a staircase leading to the famous Yahija Beach on the island. We used lightweight, high-strength FRP material that is resistant to salt damage, capable of withstanding constant strong winds! Additionally, it was constructed using a pin foundation method, allowing for installation without affecting the existing terrain. 【Construction Example】 ■ Okinawa Prefecture ■ Construction completed in March 2015 ■ W1.5m × L106.95m * For more details, please refer to the catalog or feel free to contact us.

• Other civil engineering works

We introduce the "Itsuki Otaki Natural Forest Park" in Kumamoto Prefecture as an example of the construction of an FRP boardwalk. A new walkway has been constructed to overlook the magnificent 35-meter waterfall, surrounded by a natural forest with trees over 100 years old. The area around the waterfall is constantly splashed with water, and since all material transport for about 800 meters one way had to be done manually, durable and lightweight FRP was chosen. 【Construction Example】 ■ Kumamoto Prefecture ■ Construction completed in March 2015 ■ W0.78m × L19.84m * For more details, please refer to the catalog or feel free to contact us.

• Other civil engineering works

We introduce "Raizan River" in Fukuoka Prefecture as an example of the construction of the "FRP Boardwalk." It is a waterfront deck located in a brackish water area in Maebaru City, Fukuoka Prefecture. Since rare plants inhabit the area, we selected materials to ensure sunlight reaches under the deck, and because it is a brackish water area, we chose materials to minimize buoyancy and prevent the structure from floating. Therefore, grating panels made of FRP pull-out material, which excels in salt damage resistance and corrosion resistance, were adopted. 【Construction Example】 ■ Fukuoka Prefecture ■ W1.5m × L13.8m *For more details, please refer to the catalog or feel free to contact us.

• Other civil engineering works

We introduce the "Kurosaki Nagata Wetland Nature Park" in Nagasaki Prefecture as an example of the construction of the FRP boardwalk. It is located on the northwest coast of Nagasaki City and is well-known as the best habitat for dragonflies in Japan. Due to the presence of dangerous areas caused by corrosion in the existing wooden Yatsuhashi, it has been renovated to improve accessibility and make it easier to stroll. FRP materials, which are resistant to salt damage and humidity, have been used, and additional walking paths have been created to enhance the convenience for local residents. 【Construction Example】 ■ Nagasaki Prefecture ■ Construction completed in February 2016 ■ W1.5m × L13.0・46.5・51.6m *For more details, please refer to the catalog or feel free to contact us.

• Other civil engineering works

We would like to introduce the "Minakan Final Disposal Site" in Kumamoto Prefecture as an example of the construction of the FRP boardwalk. In response to the inertia of the Kumamoto Prefecture Minakan Town industrial waste final disposal site, a boardwalk was developed to allow for a stroll around the ponds near the building. FRP materials, which are resistant to ultraviolet rays and moisture, were selected with consideration for the prefecture's water environment, and both the substructure and the decking were adopted. 【Construction Example】 ■ Kumamoto Prefecture ■ Construction completed in September 2015 ■ W4.0m × L12.75m ■ W2.0m × L18.0m ■ W3.0m × L6.0m * For more details, please refer to the catalog or feel free to contact us.

• Other civil engineering works

We introduce "Hiji Otaki" in Okinawa Prefecture as an example of the construction of the "FRP Boardwalk." This is a walkway leading to one of the few renowned waterfalls in Okinawa, located in Kunigami Village in the northern part of Okinawa Prefecture. Due to the consistently high temperature and humidity, materials were selected with a focus on durability and resistance to salt damage, resulting in the use of FRP pull-out materials. 【Construction Example】 ■ Okinawa Prefecture ■ Construction completed in March 2014 ■ W1.2m × L9.68 ･ 27.70m * For more details, please refer to the catalog or feel free to contact us.

• Other civil engineering works

We would like to introduce the "Chikugo Wide Area Park" in Fukuoka Prefecture as an example of the installation of the "FRP Boardwalk." It is a vast park located next to the Yabe River, featuring a wetland area where water constantly flows from below. Lightweight and high-strength FRP pull-out materials were used. 【Installation Example】 ■ Fukuoka Prefecture ■ Installed in January 2014 ■ W3.0m × L62.8m *For more details, please refer to the catalog or feel free to contact us.

• Other civil engineering works

We would like to introduce the "Kumejima Firefly Museum" in Okinawa Prefecture as an example of the installation of the "FRP Boardwalk." This is an observation path for the natural monument "Kumejima Firefly." Improvements have been made to the garden paths that were difficult to walk on during bad weather, while also protecting the fireflies and restricting access to areas outside the designated range. To prevent falls, ground cover has been installed, and the floorboards use a type of dozer wood with faintly glowing lines. 【Installation Example】 ■ Okinawa Prefecture ■ Installed in March 2014 ■ W1.2m × L80.9m * For more details, please refer to the catalog or feel free to contact us.

• Other civil engineering works

As an example of the construction of the "FRP Boardwalk," we introduce the "Okinawa Ocean Expo Park." In implementing universal design measures for the facilities within the park, FRP materials were selected considering their high resistance to salt damage and durability, as well as the simplification of management tasks such as maintenance and cleaning. Various FRP materials are used for the slope and stairs leading to Emerald Beach overlooking Ie Island, as well as for the access bridge and stair deck leading from the central gate to the Ocean Culture Museum and Planetarium. 【Construction Example】 ■Okinawa Prefecture ■Construction completed in February 2015 ■W2.0・4.0m × L234.6m ■W2.0m × L8.4m (Truss Bridge) *For more details, please refer to the catalog or feel free to contact us.

• Other civil engineering works

We introduce "Todoroki Falls" in Okinawa Prefecture as an example of the installation of the "FRP Boardwalk." This is a walking path where visitors can stroll around a famous waterfall that has been well-known to locals for many years, located in Nago City, Okinawa Prefecture. The surrounding area is a wetland, and FRP pull-out materials, which have high corrosion resistance against humidity and salt damage, have been selected. 【Installation Example】 ■ Okinawa Prefecture ■ Installed in March 2016 ■ W1.5m × L52.59・24.67m * For more details, please refer to the catalog or feel free to contact us.

• Other civil engineering works

As an example of the construction of the "GRP Boardwalk," we introduce the "Kuroshio no Mori Mangrove Park" in Kagoshima Prefecture. This is a walking path that has been developed to allow visitors to stroll through the famous mangrove park located in Amami City on Amami Oshima. The surrounding area is a wetland, and all work was required to be done manually. GRP pull-out materials, which excel in salt damage resistance and corrosion resistance, were selected from several types of materials. 【Construction Examples】 ■ Kagoshima Prefecture ■ W1.5m × L31.25m ■ W1.0m × L15.46m *For more details, please refer to the catalog or feel free to contact us.

• Other civil engineering works

We would like to introduce "Manko Park" in Okinawa Prefecture as an example of the installation of the "FRP Boardwalk." The walkway within Manko, which is registered as a Ramsar Convention wetland, allows for the observation of rare tree vegetation, waterfowl, fish, and crustaceans. Stairs, waiting areas, and observation decks that allow access to the wetland during low tide have been installed. Since it is in a brackish water area, FRP materials that are resistant to salt damage and highly durable have been used for the structural materials. 【Installation Example】 ■ Okinawa Prefecture ■ W1.2･0.9m × L291m ■ W3.4m × L3.4m (Birdwatching Deck) *For more details, please refer to the catalog or feel free to contact us.

• Other civil engineering works

We would like to introduce "Urasoe Great Park" in Okinawa Prefecture as an example of the construction of the "FRP Boardwalk." Considering factors such as durability, vandalism prevention, and ease of maintenance, FRP material was selected for the walking path that utilizes the hilly terrain with remaining natural forests. Measures have also been taken to enhance walkability, such as clearly defining the steps of the stairs and installing handrails. 【Construction Example】 ■Okinawa Prefecture ■Construction completed in March 2015 ■W2.0m × L88.8m ■W8.0m × L8.0m (Observation Deck) *For more details, please refer to the catalog or feel free to contact us.

• Other civil engineering works

As an example of the construction of the "FRP Boardwalk," we introduce the "Sata Misaki Observation Park (Path No. 9)" in Kagoshima Prefecture. This is a slope leading to the observation deck at the southernmost tip of Kyushu Island, located within the Kirishima-Kinkowan National Park. The elevated, winding shape allows for changing perspectives, offering distant views of the Pacific Ocean, Kinko Bay, the surrounding native cycad habitat, Biro Island, and Mount Kaimon. Due to the coastal location, FRP, a material that is resistant to salt damage and has a color close to that of wood, was chosen for its excellent aesthetic qualities in a natural environment. Additionally, since it is an area inaccessible to vehicles, a pin foundation that can be constructed manually without heavy machinery was adopted for the foundation. 【Overview】 　　■ Sata Misaki Observation Park (Path No. 9) 　　■ Kagoshima Prefecture, constructed in March 2016 　　■ W1.5m x L165.7m 　　■ Handrails and flooring: Cedar wood 　　■ Structure: FRP (pultruded material)

• Bridge Materials

As an example of the construction of the "FRP Observation Deck," we introduce the "Yamada Green Space Eco Play Park" in Fukuoka Prefecture. It is a viewpoint at the summit that offers a panoramic view of Kitakyushu City. The existing wooden facilities had deteriorated and required renovation. Since transportation to the summit had to be done manually, lightweight and high-strength FRP was adopted. 【Overview】 ■ Yamada Green Space Eco Play Park ■ Fukuoka Prefecture, constructed in February 2015 ■ W2.15m x L5m ■ Railing, floorboards, structure: FRP (pultruded material)

• Other civil engineering works

As one example of the installation of the "FRP Boardwalk," we introduce the "Wansaka Oura Park Mangrove Road" in Okinawa Prefecture. This observation path is located within Oura Bay, which has been designated as one of Japan's Important Wetlands 500 by the Ministry of the Environment. Here, you can see various species of wildlife in the rich mangrove forest and in accordance with the tidal changes of the lake. Due to its brackish water environment, FRP materials that are resistant to salt damage were used. They are also resistant to corrosion and easy to clean and maintain. In addition, there are many other installation examples, such as the Urasoe Great Park (No. 6 Walking Path) and the Sakishima Suo Tree (designated natural monument of Higashi Village) root protection deck. 【Overview】 ■ Wansaka Oura Park Mangrove Road ■ Okinawa Prefecture, constructed in March 2016 ■ W1.5・1.2m × L725.3m ■ Handrail: FRP extruded material ■ Decking: FRP extruded material ■ Structural material: FRP extruded material For more details, please refer to the catalog or feel free to contact us.

• Other civil engineering works
• Other park materials
• Wood deck (synthetic wood/resin)

As an example of the construction of the "FRP Stair Deck," we introduce Nakagusuku Park (Pathway No. 2) in Okinawa Prefecture. Located at an elevation of 150 meters, it is designated as one of Japan's 100 Historic Castles, a UNESCO World Heritage site, and offers views of the Pacific Ocean and other scenic spots. To allow everyone to stroll through the park, plans were made for walking paths and observation decks. Due to its coastal location and strong ultraviolet rays, durable and salt-resistant FRP materials were chosen. 【Overview】 ■ Nakagusuku Park (Pathway No. 2) ■ Okinawa Prefecture, construction completed in June 2016 ■ W2.0m x L87.7m ■ W6.8m x L10.4m (Observation Deck) ■ Railing, floorboards, structure: FRP (pultruded material)

• Outdoor stairs
• Bridge Construction
• Civil Engineering Method

The GRP BRIDGE is a bridge made of "GRP (Glass Fiber Reinforced Plastic)," which excels in strength, lightweight properties, and corrosion resistance. Its weight is about one-fourth that of steel, allowing for reduced foundation construction costs and transportation expenses. It can be carried and installed manually in remote areas where heavy machinery cannot access. It is resistant to corrosion from rain, wind, and salt damage, demonstrating excellent durability even in harsh environments. 【Four Strengths】 (1) Reinforced with materials like glass fiber, it is lighter and stronger compared to conventional structural materials! (2) Resistant to salt damage and water, it does not corrode! (3) Capable of suppressing deterioration from UV rays and wind and rain, it has excellent weather resistance! (4) Surface painting allows for color selection, enhancing aesthetic appeal! ★ We are currently offering a collection of construction case studies! ★ *For more details, please refer to the catalog or feel free to contact us.*

• Bridge Construction
• Bridge Materials

We would like to introduce a renovation case of the "Banna Park Firefly Waterfall Observation Deck (Ishigaki City, Okinawa Prefecture)." Within Banna Park, the southernmost forest park in Japan, there is a rare waterfall in Ishigaki Island, where fireflies can be seen dancing in early summer. The observation deck along the firefly observation path became unusable due to the decay of the wooden components, and for the renovation, corrosion-resistant FRP materials were adopted to withstand the hot and humid environment. 【Renovation Case】 ■ Renovation Details: Observation Deck Floor and Handrail ■ Materials Used ・Structural Material: Bongoshi Wood → FRP ・Flooring: Bongoshi Wood → FRP ・Handrail: Bongoshi Wood → FRP Our company is capable of making appropriate renovation proposals by combining various materials such as steel, aluminum alloys, FRP, recycled wood, and natural wood. For more details, please refer to our catalog or feel free to contact us.

• Other civil engineering works
• Other park materials
• Structural Materials

This is a renovation case of the Yatsuhashi bridge established along the walking path of the "Takase Urakawa Waterside Green Space (Tama City, Kumamoto Prefecture)." Renovation work was carried out due to the corrosion of the wooden parts of the existing Yatsuhashi. The foundation and main structural materials were reused, and FRP was adopted for its ease of walking and high durability. 【Renovation Case】 ■ Renovation Details: Entire Yatsuhashi ■ Materials Used ・Structural Materials: Steel, Bongoshi → Steel (reused) ・Decking: Cedar, Bongoshi → FRP ・Handrails: Cedar, Bongoshi → FRP Our company is capable of making appropriate renovation proposals by combining various materials such as steel, aluminum alloys, FRP, recycled wood, and natural wood. For more details, please refer to our catalog or feel free to contact us.

• Bridge Construction
• Other civil engineering works
• Other park materials

This is a renovation case of wooden stairs established along the walking path in "Sueyoshi Park (Naha City, Okinawa)," which is rich in nature. The stairs are located in a park surrounded by the town of Shuri, providing a place for citizens to relax and stroll amidst abundant nature. The area is surrounded by dense trees, and FRP pull-out materials were used to address the high temperature and humidity conditions. 【Renovation Case】 ■ Renovation Details: Entire wooden path ■ Materials Used: - Structural materials, floorboards, handrails: Bongo wood → FRP Our company is capable of providing appropriate renovation proposals by combining various materials such as steel, aluminum alloys, FRP, recycled wood, and natural wood. For more details, please refer to our catalog or feel free to contact us.

• Bridge Construction
• Structural Materials
• Other civil engineering works