High-energy absorption rockfall protection fence "Macro Fence"
High-energy absorption rockfall protection fence "Macro Fence"
High energy absorption type rockfall protection fence with small net deformation during rockfall capture.
The "Macro Fence" is a rockfall protection fence installed on slopes to protect roads and homes from rockfall disasters. It can withstand rockfall energy of up to 5000 kJ, making it effective for large-scale rockfall countermeasures. Due to the small deformation of the net during rockfall capture, it can be placed relatively close to the objects being protected. The deformation amounts of the nets for each type have been confirmed through experiments. By allowing for a configuration that is relatively close to the protected objects, the area required for land acquisition can be minimized, leading to expected cost reductions. ■ Slope-installed protection fence ■ Supports rockfall energy up to 5000 kJ ■ Effective for large-scale rockfall countermeasures ■ Available in five types according to the scale of rockfall Ministry of Land, Infrastructure, Transport and Tourism New Technology Information System (NETIS) Registration Number: HR-090007-A *Registration period has ended *For more details, please download the PDF or feel free to contact us.
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basic information
Macro fences consist of posts, wire mesh, wire nets, wire ropes, and cushioning devices. There are five types according to the corresponding rockfall energy, each differing in specifications for posts and nets, the number of anchors installed, and the number of cushioning devices. The deformation of the wire nets and cushioning devices efficiently absorbs rockfall energy. *For any inquiries or questions regarding our products and technologies, please feel free to contact us.*
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Detailed information
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"Select the optimal type according to the rockfall energy" There are five types corresponding to rockfall energies of 750kJ, 1500kJ, 2000kJ, 3000kJ, and 5000kJ, covering a wide range of rockfall energies. By choosing the optimal type based on the expected scale of rockfalls at the site, it becomes possible to implement economical measures without waste.
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The amount of net deformation is small, allowing for measures to be taken near roads and behind houses. Due to the small amount of deformation of the net during rockfall capture, it is possible to arrange it relatively close to the objects to be protected. The deformation amounts for each type of net have been confirmed through experiments. By being able to arrange the net relatively close to the objects, the area required for land acquisition can be minimized, leading to expected cost reductions. *Please determine the installation position by taking into account not only the net deformation but also the local conditions.
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"Excellent workability even on slopes" Due to the lightweight nature of the components, installation is relatively easy even on slopes.
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"Adjust the spacing of the posts to accommodate changes in terrain." We have added a version of the macro fence with a 2000kJ type that allows for the spacing of the posts to be changed from 5.0m to 10.0m in 1.0m increments. By changing the post spacing for each span, the range of applicable sites is expanded. It is possible to arrange the fence in accordance with the terrain, whether it is on a site with undulations, where a longitudinal slope is applied, or when aligning with contour lines. According to experimental results, the load energy is 2002kJ, and the deformation of the barrier surface is 8.3m.
Line up（6）
| Model number | overview |
|---|---|
| 750kJ Type | Corresponding rockfall energy: ～774.4kJ |
| 1500kJ Type | Corresponding rockfall energy: ～1637.2kJ |
| 2000kJ Type | Corresponding rockfall energy: ～2083kJ |
| 2000kJ Type (Adjustable Column Spacing Version) | Corresponding rockfall energy: ～2002kJ |
| 3000kJ Type | Corresponding rockfall energy: ～3136kJ |
| 5000kJ Type | Corresponding rockfall energy: ～5254kJ |
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Company information
Protech Engineering is a manufacturer of natural disaster prevention products, developing protective fences and walls against falling rocks, avalanches, and landslides, with over 3,000 sales achievements across Japan. As a new business area, we are also working on the development of products for debris flows and driftwood countermeasures. With the motto of contributing to society through innovation in natural disaster prevention technology, we have established a consistent production system that encompasses everything from development and proposals to design, manufacturing, and construction, and we are committed to tackling disaster prevention challenges.
![Examples of Installation of Expansion Devices | Keiji Bypass / Keihan Overpass [Crittec Industries]](https://image.www.ipros.com/public/product/image/1376992/IPROS17487594232614177304.jpg?w=280&h=280)