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  1. Home
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  5. Gutters and U-shaped gutters
  6. Renewal method for existing gutters: "W2R Method"

Renewal method for existing gutters: "W2R Method"

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last updated:Jun 30, 2026

日本興業
日本興業
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Streamlining operations for same-day release and shortening construction periods! Solving issues such as wanting to increase the water flow cross-section!

The "W2R Method" is a construction technique that involves cutting unnecessary parts of existing drainage ditches from the inside using a specialized cutter called the "W2R Cutter," and then installing a precast concrete cover known as the "W2R Drain Cover" to renew the ditch. Noise from chiseling with an electric hammer and dust generated during chiseling can negatively impact nearby residents and users. This method addresses those issues and contributes to CO2 reduction by alleviating traffic congestion through rapid construction without affecting existing sidewalks or private land. 【Features】 ■ The W2R Cutter can cut from the inside without damaging the drainage ditch. ■ The W2R Drain Cover has excellent workability. ■ The W2R Drain Cover excels in walkability and drainage performance. ■ It has minimal impact on existing sidewalks, private land, and surrounding residents, showing consideration for the environment. ■ The cutting surface of the W2R Cutter is smooth, and by installing the Pca cover after cutting, it enhances workability and shortens the construction period. *For more details, please refer to the PDF materials or feel free to contact us.

    Gutters and U-shaped gutters
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Renewal method for existing gutters: "W2R Method"

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  • Related Link - https://www.nihon-kogyo.co.jp/product/doboku/road/…

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**Especially Suitable in the Following Cases:** - When walls or similar structures are close to residential areas, and there is a risk of damage during the demolition of existing drainage ditches. - When there are many access points for stores, and construction must be completed in as short a time as possible to avoid causing inconvenience. - When residential homes or stores are in close proximity to the construction site, and there is a desire to minimize noise and dust, which could become environmental issues during the demolition of existing drainage ditches. - When the width of the sidewalk is narrow, and it is necessary to minimize the impact on pedestrians and cyclists during construction. *For more details, please refer to the PDF document or feel free to contact us.*

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Renewal method for existing drainage ditches: "W2R Method"

Renewal method for existing drainage ditches: "W2R Method"

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日本興業

日本興業

Building materials, supplies and fixtures manufacturers

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Our company integrates the manufacturing, processing, and construction of concrete products through three main businesses: civil engineering materials, landscape materials, and exterior business. We are extensively involved in national infrastructure development and the creation of rich environments. With keywords such as "coexistence with the environment," "harmony with the landscape," and "safety and security," we will accurately respond to the diverse needs of our customers. Please feel free to contact us with any requests.

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