As a check I will look at the title sheet and refer to any notes with regards to units as a confirmation.īearing this information in mind, open each drawing and check the drawing units. If a measurement of less than 1 unit is obtain (typically 0.8-1.1) then the working units are likely to be metres. If the distance command reads in the hundreds of units (typically 800-1100) then we can assume the working units are millimetres. Let’s take a typical internal door as an example. A doorway, wall thickness or another familiar element. Open each drawing and either measure a dimension or measure something that is known. Should adverse scaling occur then the first thing I check is that things are drawn to a 1:1 ratio. Obviously, this should never happen as all AutoCAD users no matter the discipline should always draw at 1:1 size, but plot to a scale. where they are coming in either too big or too small. I frequently get calls where AutoCAD users experience strange things happening with blocks, xrefs etc.
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