大建 List of Products and Services

"Tame Totto" is an underground rainwater storage tank that collects large amounts of rainwater with a quality comparable to drinking water through a simple construction process over a short period. The rainwater is purified within a gravel layer in the tank, allowing it to be used safely in a state almost equivalent to drinking water quality. Additionally, this tank has been recognized for its advanced initiatives and has received requests from the United Nations Human Settlements Programme (Habitat). 【Features】 ■ Easy to install, with a short construction period possible ■ Can be used safely in a state almost equivalent to drinking water quality ■ Microorganisms living in the gravel purify the water in about two weeks, maintaining a stable drinking water quality (alkaline) ■ The impact on construction and material costs due to variations in void ratio is minimal ■ Water temperature remains stable at around 20°C for almost the entire year *For more details, please refer to the PDF materials or feel free to contact us.

• tank
• Other water treatment equipment

The "NCZ Method" developed by our company is a construction method that enhances the seismic resistance and liquefaction resistance of houses while providing a comfortable underground space. By connecting the foundations of the house with an artificial ground, it creates a "solid foundation" with a large area, which is effective against earthquakes and liquefaction. Additionally, due to the large underground structure, it can maintain a stable condition regardless of the soil conditions. 【Features】 ■ High seismic resistance and liquefaction resistance, strong against earthquakes ■ Underground construction costs are about half or less compared to conventional underground houses *For more details, please download the PDF or feel free to contact us.

• others