Metric Units – Refer to millimetres (mm), centimetres (cm) and metres (m).Imperial Units – Refer to feet and inches.This will vary depending on which country you reside in. The first thing you must consider in choosing a scale ruler is which type of unit of measurements you are using. Learn more in the article titled “ An Introduction To Architectural Drawing Systems ” Choosing A Scale RulerĪ scale ruler is used to help understand the proportions of the drawing or model representation as a proportion of the real-life object.
Types Of ScaleĬertain scales are used to produce different drawings. When a mass or a volume (length x width x height) is either drawn three-dimensionally or created as a physical model, the real-life volume is twenty times the length and twenty times the width and twenty times the height, so 8,000 times larger. When a square or an area (length x width) is drawn on a page, the real-life area is twenty times the length and twenty times the width, so 400 times larger. What is important to note is that when a single line or length is drawn on a page the real-life line is twenty times longer. The number on the right of the colon refers to how many time larger the real-life measurement is.įor example, a scale of “one to twenty” means that one millimetre on a page represents twenty millimetres in real life.The number on the left of the colon refers to one unit on the page as a representation of real life.With metric scale, we pronounce scale as “one” which is the number on the left, “is to” which is the colon “fifty” which is the number on the right. It is important to note that architects generally use millimetres when developing their drawings, not centimetres or metres. We can either work in metric (metres, centimetres, millimetres) and imperial (feet and inches). A scale drawing or model is like taking the original and shrinking it down proportionally. In architecture, we generally reduce the scale rather than enlarge it. To view a selection of 'Imprinted' Architect's 6" to 24" Rulers, please click here.Scale in design refers to the enlarged or reduced representation of a real, full-size object in a drawing or physical model while retaining the proportions of the original. To view a selection of 'Imprinted' Architect's 6" Pocket Rulers, please click here. To view a selection of Modeler's scales, please click here. To view a selection of Architect's scales, please click here. This procedure seems somewhat cumbersome, however once you have mastered it and understand it's principle, you will be quickly and easily converting scale drawings to real measurements with no math involved. Take the reading from this part of the scale (depending on the scale this may be graduated smaller or larger than 1") and add this number to the whole feet you mentally noted earlier. Now if you go back to the zero end of the scale the fractional feet to be measured will be represented by the distance of the start point of the object being measured to the zero point on the scale. Then slide the ruler so that the number you noted mentally lines up with the end of the item being measured. This number represents the whole feet of the item you are measuring.
Mentally note this number and be sure to 'round down' even if you are close to the next number. Read the number off the scale that is closest to the ending point of the item measured. Line up the zero mark on the scale selected with the beginning of the item you wish to measure, then determine at what point on the scale the end of the item you wish to measure is. One scale reads left to right and the other right to left. Be careful when selecting the scale on the ruler, there are two scales on each edge. This would represent a drawing with a scale of 1/8" = 1 foot. For example, 1/8 on the ruler is in fact a scale that converts 1/8 inch on the drawing to 1 foot. Once the scale of the drawing has been ascertained, select the correct scale on the ruler. Most architectural, construction and engineering drawings and blueprints are scaled to allow for large areas, structures or items to conveniently fit on a reasonable size of paper.īefore using an architect's scale or ruler, it is important to know the scale of the drawing or item that is being measured. An Architect's or scale ruler is designed for use in determining the actual dimensions of a distance on a scaled drawing.
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