Technical Drawing

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

Line Types

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		stroke-width:0.70mm; stroke-linejoin:bevel
General Outlines	0.35mm		stroke-width:0.35mm; stroke-linejoin:miter
Hidden Outlines	0.35mm		stroke-width:0.35mm; stroke-linejoin:miter; stroke-dasharray:7,2

Title Blocks

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

Brickwork

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.