...There are many types of hollow concrete blocks in civil engineering, such as for revetments and retaining walls. JIS divides hollow concrete blocks into basic blocks and irregular blocks according to shape, with the former measuring 390mm in length, 190mm in height, and four types of thickness: 190mm, 150mm, 120mm, and 100mm. There are also three types, A, B, and C, according to quality, and normal blocks and waterproof blocks according to watertightness. *Some of the terminology explanations that mention "basic blocks" are listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…土木では護岸用,土止め用など,種類が多い。JIS(ジス)では空胴コンクリートブロックを形状によって基本ブロックと異形ブロックに分けており,前者の寸法は長さ390mm,高さ190mmで,厚さは190mm,150mm,120mm,100mmの4種がある。また品質によりA,B,Cの3種があるほか,水密性により普通ブロックと防水ブロックの別がある。… ※「基本ブロック」について言及している用語解説の一部を掲載しています。 出典|株式会社平凡社世界大百科事典 第2版について | 情報 |
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