Australian standards for engineering and technical drawing. Identified as Australian Standard AS 1100, the standards include a number of parts that describe the conventions for Australian engineers, designers, architects and associated tradespeople such as builders and plumbers to follow. AS 1100 incorporates general principles for technical drawing, including dimensioning, types of lines and layouts to use, scales, symbols, abbreviations and their meanings. It also includes mechanical engineering drawing, including information for surface texture, welding, centre holes, gears, etc.