Technical Drawing

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This is a style guide for technical drawing, whether on paper or screen.

Line Types[edit]

Standard widths: 0.13mm, 0.18mm, 0.25mm, 0.35mm, 0.50mm, 0.70mm. These are designed to be scaled to different ISO standard paper sizes and still be of a standard width (i.e. there is a multiplier of √2 between each).

Use Width Example SVG style guide
Page & title box borders 0.70mm Technical Drawing Line Types, 0.70mm solid.svg stroke-width:0.70mm; stroke-linejoin:bevel
General Outlines 0.35mm Technical Drawing Line Types, 0.35mm solid.svg stroke-width:0.35mm; stroke-linejoin:miter
Hidden Outlines 0.35mm Technical Drawing Line Types, 0.35mm dashed.svg stroke-width:0.35mm; stroke-linejoin:miter; stroke-dasharray:7,2

Title Blocks[edit]

Include enough information to enable the drawing to be completely understood. In no particular order:

  • Context (of the subject);
  • Draughtsperson;
  • Scale;
  • Date;
  • Revisions;
  • Title;
  • Units (if other than milimeters);
  • Copyright (of both the drawing and the design);
  • Reference number; and
  • URL.

A title block should not exceed 170mm in width.

Representation of Materials[edit]

Brickwork[edit]

Brickwork in section is represented by parallel 0.35mm lines, outlining the actual (i.e. scaled) width of the brickwork, with double 0.25mm lines crossing at 45˚, spaced three line-thicknesses apart and such that one pair starts 1/3 of the wall thickness from where the previous pair met the opposite line.