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The "FRP BRIDGE" is a bridge made from FRP materials that excel in lightweight and durability. As one of the construction examples in locations accessible to management and emergency vehicles, we introduce a case from "Kitakyushu City Nagano Green Space (Fukuoka Prefecture)." 【Construction Example】 ■Structure: Bridge length (11.0mL × 3.0mW) 　　　　*Accessible for management vehicles weighing up to 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, Netherlands." For more details, please refer to the catalog or feel free to contact us.

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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 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 a wealth of construction experience in numerous projects, including 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.

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The "FRP BRIDGE" is a bridge made of FRP material, which excels in lightweight and durability. As one of the construction examples in locations where only manual installation is possible, 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 ・Handrail: FRP (Pultruded material) ・Decking: FRP (Grating) ・Structural Material: FRP (Pultruded material) In addition, we have accumulated construction achievements in numerous projects such as "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.

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The "FRP BRIDGE" is a bridge made of 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 a wealth of construction experience in numerous projects, including Nakagusuku Park (Okinawa Prefecture). For more details, please refer to the catalog or feel free to contact us.

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We would like to introduce an example of the Pin Foundation method in a location where valuable flora and fauna inhabit. Conventional foundation methods, which involve excavating the ground and pouring large concrete blocks, cause significant environmental changes to the flora and fauna in the area. In our method, only small-diameter steel pins are driven in through a stabilizing block, 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: ・Railing/Flooring/Structural materials: FRP ■ Foundation type: DP-100/DP-L/SP For more details, please refer to the catalog or feel free to contact us.

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Here are examples of the Pin Foundation Method applied 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 preserve important historical sites as much as possible or avoid damaging the roots of significant trees. 【Example 1】 ■ Nationally Designated Historic Site: Ikebe Temple Ruins (Kumamoto Prefecture) ■ Structure: Effective width 1.5m, pillar pitch 2.5–3.8m ■ Materials Used: ・Railing: Ipe wood, recycled wood, aluminum alloy ・Flooring: Ipe wood ・Structural material: FRP ■ Foundation Type: DP-75, SP 【Example 2】 ■ Historical Park: Maruichi Castle ■ Structure: Effective width 1.5m, pillar pitch 2.0m ■ Materials Used: 　Railing, flooring, structural material: Cedar wood ■ Foundation Type: DP-M 【Example 3】 ■ Amagafubaru Rural Park ■ Structure: Effective width 1.8m, pillar pitch 2.5m ■ Materials Used: 　Railing: Ipe wood, Chatoba wood 　Flooring: Ipe wood 　Structural material: Aluminum alloy, Angelim wood, Ipe wood ■ Foundation Type: DP-M For more details, please refer to the catalog or feel free to contact us.

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This is an example of the pin foundation method used in places 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 to the construction site, which involves cutting down trees and 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.

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Here is an example of the pin foundation construction method in areas inaccessible to heavy machinery. The materials used in this method are only anchoring blocks and multiple pins. Both are lightweight, allowing for transportation entirely by human power. Additionally, construction can be easily carried out using handheld electric tools, making it simple to install the foundation. [Case Study] - Hohashira 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 Case Studies] - Nakagawa Town Andoku, Seta no Mizo (Fukuoka Prefecture) - Structure: Effective Width 2.0m - Support 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.

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As one example of the installation of "FRP Pergolas," we introduce a case from Kumamoto Prefecture: the "Kumagawa Cycling Road (Yumemai Hitoyoshi Bicycle Path)." The area along the Kumagawa Cycling Road has few large trees, so a pergola was installed as a shaded facility for resting during the summer while enjoying the cool waters of the Kumagawa River. FRP materials, known for their strength and durability, were used as vines will be entwined around the pergola. Additionally, there are many other installation examples, including 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 and beams: FRP (pultruded material) ■ Structure: Steel and recycled wood For more details, please refer to the catalog or feel free to contact us.

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As one 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, and are 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 ■ Handrail: Stainless steel ■ Decking: Recycled wood ■ Structural material: FRP pull-out material For more details, please refer to the catalog or feel free to contact us.

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Here are examples of the installation of the "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 a highland on an island linked by the underwater road to the lower road, utilizing FRP that blends into the surrounding natural landscape. In June 2016, "Nakagusuku Park (Route 2)" was constructed at the Nakagusuku Castle ruins, designated as one of Japan's 100 Historic Castles, where FRP materials were chosen for all structural components and flooring of the promenade and observation deck, focusing on strength, durability, and salt damage resistance. Additionally, there are 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.

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Comtech Co., Ltd. responds to all needs from inspection to renovation of wooden facilities, taking into consideration 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 based on the emphasis on durability, functionality, aesthetics, and economy. **Contents of the Case Study Collection** - Types of inspection methods - Stress wave velocity measurement devices - Decay diagnosis - Various renovation examples (with Before and After photos) - Various materials used in renovations, etc. **For Renovation and Inspection of Places Like:** Wooden facilities such as park maintenance, observation terraces, viewing decks, walking paths, trails, stairs, girder bridges, rooftop decks, railings and privacy walls, piers, pergolas, and boardwalks. *For more details, please contact us or download the catalog.*

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■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 significant 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 large-scale excavation of the ground surface. This method is ideal for foundations in locations where heavy machinery cannot be brought in or in areas where it is important to protect the natural environment. It is also suitable for weak ground conditions (equivalent N value of 0.5 to 2.0) where conventional methods cannot be applied. This method is registered with the Ministry of Land, Infrastructure, Transport and Tourism's New Technology Information System (NETIS).

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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.

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Vacuum Infusion The entire fiberglass mat layered on the mold is covered with a film to seal it, and the air from the fiberglass layer is removed to create a complete vacuum state. Next, using the power of the vacuum, polyester resin is injected into the fiberglass layer, ensuring it spreads evenly throughout, resulting in 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 the hulls of yachts. Laminates produced using this method are used in the structural components of FRP bridges. The high fiberglass 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 as either flat or curved, enabling the creation of elegantly shaped bridge beams.

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