High-durability wooden barn-style retaining wall construction [From concrete to wood] Easy to install!
No need for a curing period! Easy material transportation! Excellent workability, allowing for a shortened construction period! Consideration for landscape is also achieved!
The high-durability "wooden school barn-style earth retaining structure" promotes the use of wood by transitioning from traditional concrete and steel structures to wooden ones, contributing to the global environment. By deeply impregnating wood with preservatives, we have achieved long-term durability comparable to that of concrete and steel retaining walls. The estimated lifespan based on decay test results is over 50 years. Demonstration experiments and structural calculations have proven that the strength of the components and the resistance of the joints are sufficient, confirming that it functions as a unified structure without issues. Stability calculations for gravity structures consider stability against overturning, sliding, and ground support. The assembly construction does not require skilled labor due to pre-cut components made in the factory. It is suitable for construction sites where material delivery is difficult. It is featured in the "Essential Guide for Mountain Forest Roads (Estimation and Construction Edition)." **Features** - Stability: A structure based on stability calculations and structural calculations as a gravity structure. - Durability: Meets the "quality, performance, and durability" required for civil engineering structures. - Economic efficiency: Comparable to gravity concrete. - Speed: Excellent workability allows for shortened construction periods. - Environmental consideration: Promotes the use of wood and takes landscape into account. *For more details, please visit our website or PDF materials, or feel free to contact us.*
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basic information
We will handle the layout of the wood and other aspects from the design stage. *Please feel free to contact us.
Price information
- Prices may vary depending on quantity and usage area. - Areas available for local timber support (primarily domestic timber). - The estimate will be for the entire structure.
Delivery Time
※Delivery dates may vary depending on the conditions, so please feel free to contact us.
Applications/Examples of results
【Purpose】 ■ Soil retention work, retaining wall work 【Track Record】 ■ Over 1,200 installations nationwide ■ Main clients: Ministry of Agriculture, Forestry and Fisheries (Forestry Agency), Ministry of Land, Infrastructure, Transport and Tourism, Ministry of the Environment, various prefectures (agriculture, forestry, civil engineering), various municipalities *For more details, please refer to the construction examples on our website or feel free to contact us.
Detailed information
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It is a gravity structure formed by assembling wall materials (horizontal members) and support materials (vertical members) in a lattice pattern, filled with infill materials (on-site generated soil or gravel). Due to the friction resistance of the processed circular cut on the support materials, it acts as an integrated structure while possessing flexible performance. ◎ On-site generated soil can be reused ◎ Spring water areas are filled with gravel (permeable) ◎ Can accommodate unstable soil conditions such as differential settlement
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"Wooden Storehouse-type Retaining Wall Construction" Nara Prefecture, Southern Agricultural and Forestry Promotion Office Kawamata Tenji Line Forest Main Road Development Within Nasuhara, Nishiyoshino Town, Gojō City ◎ It accommodates vertical gradients and planar angles.
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"Wooden Storehouse-Type Soil Retaining Work" Chubu Forest Management Bureau, Higashi-Nou Forest Management Office Nakatsugawa (Ochiai 2) Restoration Erosion Control Project Nakatsugawa City, Ochiai, Ena National Forest (Taken 8 years after the event)
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"Wooden Storehouse-Type Soil Retaining Work" Kinki-Chugoku Forest Management Bureau, Wakayama Forest Management Office Kii Tanabe District, Private Forest Direct Control Erosion Control Project Kumano-cho, Tanabe City, Kamikiriwara It is also being adopted for restoration work in areas affected by Typhoon No. 12 disaster in September 2011.
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Company information
Koshii Preserving Co., Ltd. is engaged in the manufacturing, sales, research and development, and application development of wood preservation chemicals. By combining pressure-treated wood with services, technology, and design, we create a market that has never existed before through product development that considers the final intended use.