ISO 2594:1972 [ Withdrawn ] Building drawings -- Projection methods

standard by International Organization for Standardization, 09/01/1972

Full Description

Two methods are defined and the symbols specified as shown in the figures. The direct orthogonal projection is symbolized by two parallel arrows running vertically to a dash-and-dot line, and the mirror-inverted orthogonal projection by two parallel double arrows running vertically to a dash-and-dot line.