scope:

This Japanese Industrial Standard specifies requirements for the carbon steel tubes (hereafter referred to as tubes), used for civil engineering and architecture such as steel towers, scaffoldings, footing piles, foundation piles, piles for landslide suppression.

NOTE The dimensional range covered by this Standard is generally outside diameter 21.7 mm to 1 016.0 mm. In application for foundation piles and piles for landslide suppression, however, this Standard is mainly applicable to tubes of outside diameter under 318.5 mm, and JIS A 5525 applies mainly to welded steel tubes of outside diameter 318.5 mm or over.