KC type is also available! Box culverts certified by the Japan Sewage Works Association.
We handle box culverts and KC box culverts that are certified materials by the National Box Culvert Association, the Japan Sewage Works Association Class I, and products certified by JIS standards. These comply with the "Guidelines for Road Earthwork Culverts" by the Japan Road Association. We also offer KC types that conform to the above standards. Please feel free to contact us if you have any requests. *For more details, please download the PDF or contact us.
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【Design Conditions】 ■Integrated Type ・Live Load: T-25 ・Unit Weight of Soil: 19 kN/m3 ・Horizontal Earth Pressure Coefficient: 0.50 ・Internal Dimensions: [RC] Internal Width 0.6m to 3.5m, Internal Height 0.6m to 2.5m [PC] Internal Width 1.8m to 5.0m, Internal Height 1.2m to 2.5m ・Soil Cover: [RC] 0.2m to 3.0m [PC] 0.5m to 3.0m ・Reference Guidelines Japan Road Association "Road Earthworks Culvert Guidelines (2010)" National Box Culvert Association "Precast Box Culvert Design and Construction Manual (2011)" *For more details, please download the PDF or contact us.
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Keikon Co., Ltd. is a comprehensive construction company engaged in the design, construction, manufacturing, and sales of concrete secondary products such as retaining walls, road products, and fire water tanks, as well as bridge and tunnel construction and slipform construction methods, boasting a top-class position in the industry as a manufacturer of concrete secondary products. In terms of the environment, we have established our own internal standards and label our products that are recognized for reducing environmental impact with the "Keko Mark." We will continue to focus on the development of related products more than ever before, aiming for "coexistence between people and nature."