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57 Understanding spatial relationships is list shows some metric and inch / foot scales used for interior design drawings. It is clear that common inch / foot scales are similar to, but not precisely the same as, common metric scales. Common metric scales Common inch / foot Scales Actual metric equivalent 1 : 10 1" = 1' 1 : 12 1 : 25 ½" = 1' 1 : 24 1 : 50 ¼" = 1' 1 : 48 1 : 100 ⅛" = 1' 1 : 96 e largest scale shown (1 : 10 ) might be used for showing construction details or similar. e other scales could all be used for drawing plans, elevations and sections to describe spaces from small rooms to entire fl oors of large buildings. When it is necessary to show construction details for bespoke work, it might be appropriate to draw at full size, or a scale of 1 : 1. In some instances, details might be enlarged to show clearly how they are to be constructed. A scale of twice full size would be wri en as 2 : 1. ere is no right or wrong scale to use for a drawing. e aim is to show the maximum amount of detail possible in the space, and therefore the most appropriate scale will usually be the one that neatly fi lls the space available on the drawing paper that is being used. A quick comparison of the overall dimensions of the space at typical scales will show which scale is the most appropriate for a particular drawing. When drawing manually, the scale needs to be decided before dra ing begins. When dra ing with CAD, the drawing scale can usually be changed prior to printing the fi nished drawing on to paper. Whatever scale is ultimately chosen, it should be clearly stated on the drawing, and because of the possibility of uncontrolled enlargements or reductions being made outside of the drawing offi ce, it is good practice to state paper size in addition to the scale, for example 1 : 25 at A 3. A typology of technical drawing