5.144. May lines of different thicknesses be used in the same drawing? Lines and strokes of different thicknesses may be used in the same drawing where different thicknesses have a different meaning. One could, for instance, use:
a continuous thick line for edging and outlining views and cross-sections;
a continuous thin line for reference lines (see paragraph 5.145 for further details), hatching, outlining parts of adjoining elements, fictitious lines of intersection of surfaces connected by curved or rounded edges;
a continuous thin line drawn freehand for delimiting views, part sections or interrupted views;
a thin broken line made up of short dashes for hidden edges and contours;
a dot-dash thin line for axes and planes of symmetry, extreme positions of movable elements, in front of a cross-section;
a thin line terminating in two thick lines for outlines of cross-sections.
Date retrieved: 24 November 2017