IS 962:1989 is the Indian Standard (BIS) for architectural and building drawings. This code establishes standard practices for architectural and building drawings in India. It standardizes drawing sheet sizes, layout, scales, line weights, abbreviations, and graphical symbols to ensure clear and uniform communication across architects, engineers, and contractors.
Code of practice for architectural and building drawings
BIM-relevant code. See the BIM Hub for ISO 19650, IFC, and LOD/LOIN frameworks used alongside it.
| Parameter | IS Value | International | Source |
|---|---|---|---|
| Primary Projection Method | First Angle Projection (Third Angle permitted if indicated). | First Angle (preferred in Europe/Asia) or Third Angle (preferred in North America). Both require a standard symbol. | ISO 5456-2 |
| Standard Sheet Sizes | ISO 'A' series (A0-A4) plus a special 'ISAS' series. | ISO 'A' series (A0-A4) and 'B' series. No 'ISAS' equivalent. | ISO 216 |
| Line Thickness Ratio | Ratio of thick to thin lines should be at least 2:1. | Ratio of 2:1 between line widths of the same type; ratio of √2 between successive line thicknesses in a group. | ISO 128-20 |
| Title Block Location | Bottom right-hand corner of the drawing sheet. | Bottom right-hand corner of the drawing sheet. | ISO 7200 |
| CAD Layer Naming Standard | Not specified. | Prescribed, detailed format, e.g., 'Discipline-Major-Minor-Status' (A-WALL-FULL-N). | US National CAD Standard V6 |
| Recommended Lettering Heights | 2.5, 3.5, 5, 7, 10, 14, 20 mm. | Standard heights based on √2 progression: 1.8, 2.5, 3.5, 5, 7, 10, 14, 20 mm. | ISO 3098-2 |
| Dimension Line Termination | Arrowheads, oblique strokes, or dots. | Arrowheads (filled or open), oblique strokes, or dots. | ISO 129-1 |