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The "FRP BRIDGE" is a bridge made of FRP materials that excel in lightweight and durability. As one example of a side road bridge constructed to secure a walking path on a bridge without a sidewalk, we will introduce the construction case of the "Minamata Old Fishing Boat Ironworks Site Side Road Bridge (Kumamoto Prefecture)." 【Construction Case】 ■ Structure: Bridge length (12.0mL × 2.0mW) ■ Materials Used ・Handrail: FRP (pulled material) ・Deck: FRP (vacuum infusion method) ・Structural material: FRP (vacuum infusion method) In addition, we have accumulated construction achievements in numerous projects, including the "Onojo City Kawakubo Side Road Bridge (Fukuoka Prefecture)." For more details, please refer to the catalog or feel free to contact us.

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• Bridge Materials
• Bridge Construction

The "FRP BRIDGE" is a bridge made from FRP materials that excel in lightweight and durability. As one example of construction in a location accessible to management and emergency vehicles, we introduce a project at "Nagano Green Space in Kitakyushu City (Fukuoka Prefecture)." 【Construction Example】 ■Structure: Bridge length (11.0mL × 3.0mW) 　　　　*Accessible to management vehicles weighing 3 tons ■Materials Used 　・Railing: FRP (pultruded material) 　・Deck: FRP (vacuum infusion) 　・Structural material: FRP (vacuum infusion) In addition, we have accumulated construction achievements in numerous projects, including "Utrecht City in the Netherlands." For more details, please refer to the catalog or feel free to contact us.

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• Bridge Materials
• Bridge Construction

The "FRP BRIDGE" is a bridge made of FRP material, which excels in lightweight and durability. As one example of a suspension bridge constructed in locations that can only be accessed by human power, we introduce the "Hiji Otaki Suspension Bridge (Okinawa Prefecture)." 【Construction Example】 ■ Structure: Bridge length (50mL × 1.5mW) ■ Materials Used ・ Handrail: FRP (pultruded material) ・ Decking: FRP (pultruded material) ・ Structural Material: FRP (pultruded material) In addition, we have accumulated construction achievements in numerous projects such as the "Kirishima Mountain Water Management Bridge Tenkei Bridge" and the "Yanbaru Learning Forest Forest Walking Path." For more details, please refer to the catalog or feel free to contact us.

• Bridge Construction
• Bridge Materials

The "FRP BRIDGE" is a bridge made using FRP materials that excel in lightweight and durability. As one example of construction in locations that can only be installed manually, we introduce the "Sendan Taki Promenade (Kumamoto Prefecture)." 【Construction Examples】 ■Structure ・Bridge Length 1 (16.3mL × 1.5mW) ・Bridge Length 2 (7.5mL × 1.1mW) ・Bridge Length 3 (6.06mL × 1.1mW) ■Materials Used ・Railing: FRP (Pulled Material) ・Decking: FRP (Grating) ・Structural Material: FRP (Pulled Material) In addition, we have accumulated construction achievements in numerous projects, including "Aguni Island Taisho Pond Park" and "Banna Park" in Okinawa Prefecture. For more details, please refer to the catalog or feel free to contact us.

• Bridge Construction
• Bridge Materials

The "FRP BRIDGE" is a bridge made from FRP materials that excel in lightweight and durability. As one example of construction in locations where heavy machinery or cranes can be used, we introduce the "Iwaya Park Heian Bridge (Kagoshima Prefecture)." 【Construction Example】 ■ Structure: Bridge length (36.0mL × 2.0mW, 2 spans) ■ Materials Used ・Handrail: FRP (pultruded material) ・Deck: FRP (vacuum infusion method) ・Structural material: FRP (vacuum infusion method) In addition to this, we have accumulated construction achievements in numerous projects, including Nakagusuku Park (Okinawa Prefecture). For more details, please refer to the catalog or feel free to contact us.

• Bridge Construction
• Bridge Materials

We will introduce an example of the Pin Foundation Method in a location where valuable flora and fauna reside. Conventional foundation methods, which involve excavating the ground and pouring large concrete blocks, cause significant environmental changes to the flora and fauna living in the area. In our method, only small-diameter steel pins are driven in through fixed blocks, so there is no alteration to the ecosystem of the valuable flora and fauna. [Case Study] ■ Okikubugawa Promenade (Okinawa Prefecture) ■ Structure: Effective width 1.2m, column pitch 2.5m ■ Materials used: - Handrails/Floorboards/Structural materials: FRP ■ Foundation type: DP-100/DP-L/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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Here are examples of the pin foundation method used in locations with important historical sites and significant trees. This method involves driving small-diameter pins through a stabilization block, eliminating the need for excavation of the ground surface. It is an effective foundation method when you want to protect important historical sites as much as possible or when you want to avoid damaging the roots of significant trees. 【Example 1】 ■ Nationally Designated Historic Site: Ikebene Temple Ruins (Kumamoto Prefecture) ■ Structure: Effective width 1.5m, column pitch 2.5–3.8m ■ Materials Used: ・Handrail: Ipe wood, recycled wood, aluminum alloy ・Flooring: Ipe wood ・Structural materials: FRP ■ Foundation Type: DP-75, SP 【Example 2】 ■ Historical Park: Maru Chijo ■ Structure: Effective width 1.5m, column pitch 2.0m ■ Materials Used: 　Handrail, flooring, structural materials: Cedar wood ■ Foundation Type: DP-M 【Example 3】 ■ Amagafubaru Rural Park ■ Structure: Effective width 1.8m, column pitch 2.5m ■ Materials Used: 　Handrail: Ipe wood, Chatoba wood 　Flooring: 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
• Ground foundation construction method
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This is an example of the pin foundation construction method in a location where we want to protect the natural environment. In the case of conventional concrete foundations, significant natural destruction occurs due to the need to create access roads by cutting down trees or excavating the ground. However, with our method, all transportation of materials and foundation installation can be done manually, minimizing environmental damage. 【Example】 ■ Matsuda Mega Cave (Okinawa Prefecture) ■ Structure: Effective width 1.5m, column pitch 2.5m ■ Materials used: - Handrails/Floorboards/Structural materials: FRP ■ Foundation type: DP-75 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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Here is an example of the pin foundation method being implemented in a location inaccessible to heavy machinery. The materials used in this method are only anchor blocks and multiple pins. Both are lightweight, allowing for transportation to be done entirely by human power. Additionally, construction can be easily carried out using handheld electric tools, making it simple to install the foundation. 【Example】 ■ Sail Column Forest Botanical Garden (Fukuoka Prefecture) ■ Structure: 3.0m x 4.0m ■ Materials Used ・ Railing: Ipe wood ・ Floorboard: Ipe wood ・ Structural Material: FRP ■ Foundation Type: DP-S 【Other Examples】 ■ Nakagawa Town Andoku, Seta no Mizo (Fukuoka Prefecture) ■ Structure: Effective Width 2.0m Post Pitch 2.5m 【Materials Used】 　　Railing … Cedar wood 　　Floorboard … Cedar wood 　　Structural Material … Aluminum alloy 【Foundation Type】 　　DP-M 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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As one example of the installation of "FRP Pergolas," we introduce the case of the "Kumagawa Cycling Road (Yumemai Hitoyoshi Bicycle Path)" in Kumamoto Prefecture. The area along the Kumagawa Cycling Road has few large trees, so a pergola was installed as a shaded facility for resting while enjoying the cool waters of the Kumagawa River during the summer. FRP materials, known for their strength and durability, were chosen as the vines will be intertwined with the pergola. Additionally, there are many other installation examples, such as at the Polytechnic College of Kawauchi (Kagoshima Prefecture). 【Overview】 ■ Kumagawa Cycling Road (Yumemai Hitoyoshi Bicycle Path) ■ Kumamoto Prefecture, installed in June 2015 ■ W3.0m × L3.55m, 11 units ■ Louvers, beams: FRP (pultruded material) ■ Structure: Steel and recycled wood 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 Observation Deck," we introduce the case of the "Amakusa No. 3 Bridge Observation Terrace" in Kumamoto Prefecture. Due to the steep slope and narrow location, it was impossible to use construction machinery, so a pin foundation method that could be done entirely by manual labor was selected. Additionally, since it is located along the coast, FRP materials that are resistant to moisture and salt damage, as well as being high-strength and durable, were adopted. There are many other construction examples, such as the bird-watching deck at Manko Park. 【Overview】 ■ Environmental improvement of National Route 266 ■ Kumamoto Prefecture, constructed in November 2015 ■ W6.1m × L15m ■ Railing: Stainless steel ■ Floorboard: Recycled wood ■ Structural material: FRP pull-out 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)

Here are examples of the installation of "FRP Stair Deck" in Okinawa Prefecture. The "Senaga Island Evacuation Route and Promenade," completed in March 2015, is a promenade that also serves as an evacuation route connecting the elevated area of an island linked by the underwater road to the lower road. FRP, which blends into the surrounding natural landscape, has been adopted. In addition, in June 2016, "Nakagusuku Park (Route 2)" was constructed at the Nakagusuku Castle ruins, designated as one of Japan's 100 Historic Castles, with a focus on material selection for strength, durability, and salt damage resistance. As a result, FRP materials were used for all structural components and flooring of the promenade and observation deck. There are also many other installation examples, including the stairs at "Aguni Island Yahija Beach" and the promenade deck in "Banna Park Zone A." 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)

Comtech Co., Ltd. responds to all needs from inspection to renovation of wooden facilities, taking into account the environment and landscape, utilizing not only knowledge but also extensive experience. 【Main Features of Comtech】 ◆ Inspections using appropriate methods based on extensive experience and achievements ◆ Planned maintenance management from the initial installation, with suitable maintenance tasks tailored to the facility ◆ Various materials can be used appropriately depending on the focus on durability, functionality, aesthetics, and cost-effectiveness 【Contents of Case Study Collection】 ◇ Types of inspection methods ◇ About stress wave velocity measurement devices ◇ Decay diagnosis ◇ Various renovation examples (with Before⇒After photos) ◇ Various materials used in renovations, etc. 【For Renovation and Inspection of Places Like These】 Wooden facilities such as park maintenance, observation terraces, viewing decks, walking paths, trails, stairs, beam bridges, rooftop decks, railings and privacy walls, piers, pergolas, and wooden paths. *For more details, please contact us or download the catalog.

• Renovation and repair methods
• Wood deck (synthetic wood/resin)
• Wood processing

■Optimal New Foundation Method for Protecting the Natural Environment The Pin Foundation is a foundation method designed for small-scale structures such as boardwalks, bridges, and pavilions. Traditional concrete foundation methods typically involve extensive excavation of the ground and the transportation of foundation blocks using heavy machinery. In contrast, the Pin Foundation method does not require heavy machinery and does not necessitate significant excavation of the ground surface. This method is ideal for foundations in locations where heavy machinery cannot be brought in or where it is important to protect valuable natural environments. It is also capable of addressing weak ground conditions (equivalent N value of 0.5 to 2.0) that traditional methods cannot accommodate. This method is registered with the Ministry of Land, Infrastructure, Transport and Tourism's New Technology Information System (NETIS).

• Bridge Construction
• Ground foundation construction method
• Ground improvement

Resistant to rainwater and salt damage, and does not corrode. Maintenance costs can be reduced. Can accommodate sites where material delivery is difficult. Can shorten construction periods and reduce on-site construction costs. Foundation work can be minimized. A texture that matches the refined urban landscape. Exhibits excellent weather resistance and durability even in harsh natural conditions such as mountains and coastal lakes. The performance of GRP pull-out materials is utilized in various scenes.

• Bridge Construction
• Other civil engineering works

Vacuum Infusion The entire glass fiber mat layered on the mold is covered with a film and sealed, creating a complete vacuum state by removing the air from the glass fiber layer. Next, using the power of the vacuum, polyester resin is injected into the glass fiber layer, ensuring it spreads evenly to create a uniform and strong FRP laminate. This manufacturing method is referred to as "Vacuum Infusion (VI)." This technique is also used in the production of large blades for wind turbines and yacht hulls. Laminates produced using this method are used in the structural components of FRP bridges. The high glass fiber content allows for lightweight and strong laminates, and there is the advantage of being able to produce very large laminate sheets. The shape of the mold can be freely designed, whether flat or curved, enabling the creation of elegantly shaped bridge girders.

• Bridge Construction