Australian Standard 1100.301 (Table 2.6) provides guidance on recommended scales, as detailed in this table.

Drawing Recommended scales Use/s
Design drawings
Schematic drawing 1:200
1:100
1:50
To show the overall design of the building.
Production drawings
1. Location drawings
Block plan 1:200
1:100
1:50
To locate the site within the general district.
Site plan 1:500
1:200
To locate building work including service and site works – on the site.
General location drawings 1:200
1:100
1:50
To indicate the juxtaposition of rooms and spaces, and to locate the position of components and assemblies
Special area
Location drawings
1:50
1:20
To show the detailed location of components and assemblies in complex areas.
2. Construction detail drawings
Construction details 1:20
1:10
1:5
1:2
1:1
To show the interface of two or more components or assemblies for construction purposes.
3. Component and assembly drawings
Range drawings 1:100
1:50
1:20
To show in schedule form, the range of specific components and assemblies to be used in the project.
Component and assembly details 1:10
1:5
1:2
1:1
To show precise information of components and assemblies for workshop manufacture.

Reproduced under copyright licence from SAI Global.