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Last edited 05 Aug 2022
The term scale describes the relationship between a depiction of a building, object, area of land etc compared to its actual size. Scale us usually expressed as a ratio of one unit of the represented scale compared to the actual full size dimension. So full scale is 1:1, whereas a scale on fifth of the actual size is 1:5. For more information see: Scale.
Scale drawings are used to illustrate items that it is not useful or convenient to draw at their actual size. This may be because drawing the item at full size would be unmanageable, or would not easily fit on a single sheet of paper (such as a building). For more information see: Scale drawing.
Scale rules typically measure full scale dimensions up to 300mm. They are generally either flat (actually a flat oval shape), similar to a conventional ruler, with 8 different scales along their four edges (2 on each edge), or a three pronged star shape (generally referred to as triangular) with 12 different scales along their 6 edges.
The scales on a 6 edged triangular scale rule are generally: 1:1, 1:10, 1:2, 1:20, 1:5, 1:50, 1:100, 1:200, 1:500, 1:1000, 1:1250 and 1:2500. However, they may only have 6 scales, one on each edge: 1:20, 1:25, 1:50, 1:75, 1:100 and 1:125.
- Drawing board.
- Manual drafting techniques.
- North American Paper Sizes
- Parallel motion.
- Paper sizes.
- Scale drawing.
- Symbols on architectural drawings.
- Technical drawing.
- Technical drawing pen sizes.
- Techniques for drawing buildings.
- Types of drawing.
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