This International Standard lays down rules for the represen-tation of modular sizes, lines and grids on construction draw-ings. The basic module M is 100 mm (see ISO 1006).
Generally, modular sizes should be used on design drawings. Construction and work sizes should be used on production drawings.
Modular sizes, lines and grids make the planning and design work easier. Multinodular grids may be added, to a limited extent, on construction drawings for manufacturing and con-struction for orientation and location.