Unless this is a home for the 7-Dwarfs in the tale of Sleeping Beauty than the scale isn’t a 1/4″. Looking at the above we can see that the doorway measures 1-1/2 feet on a 1/4′ scale. Checking the scale using a doorway (This indicates that 1/4″ is incorrect) are about 3 feet wide, so if you measure a doorway it will let you know the proper scale to use.Ĭhecking the scale using the doorway and the 1/4″ = 1′-0″ scale. For instance, most doors in our local area and in the U.S. By using some know distance like a doorway or the distance between columns, you can determine the true scale.Įverything on the drawing has been drawn to some scale so it’s a matter of finding something that you know the dimension of and laying your scale down next to it to find the right scale. Sometimes the scale is not shown on the drawings are is indicated incorrectly. Determining the Scale when No Scale is Shown It’s important to confirm you have the correct scale, otherwise all of your material lengths will be incorrect. If there isn’t a bar scale, then there are other methods to confirm the drawings scale. If they didn’t match, then you would try another scale on your ruler until you found one that did. Bar Scale Chart 1/4″ = 1′-0″Īs seen above the zero’s (0) and the four’s (4) line up exactly between the ruler and the drawings bar scale, so you know you got the right scale. Set your ruler so that the zero (0) on your scale aligns with the zero (0) on the bar scale, then check to see if the rest of the numbers line up exactly. If none match, then your drawings aren’t to scale and weren’t printed correctly. The bar scale here is accurate even when reduced, so if your drawings have one of these all you have to do is put your ruler up to the scale bar and see which of the scales match exactly the numbers on the bar as shown below. The Title of the Drawing, the scale and the North arrow indicator. Often times you will find all three bits of information located together as in the above drawing and as shown in the insert below. There are often many different scales used in the same set of drawings, as they can be on floor plans, elevation pans, section views and details. The scale is usually shown in the lower right hand corner of the drawing or under the title of the page. The scale provides a quick method for measuring drawn objects, such as the length of ducts, pipes, and electrical conduits.
#How to read a metric scale ruler full
It’s not practical to draw a building to full scale, so various ratios are used to represent the actual size of the building.
#How to read a metric scale ruler how to
How to determine the scale of a drawing where the scale isn’t indicated.How to read a Metric scale (mostly used for buildings in other parts of the world).
Chapter #6 – Drawing Scales (How to Read Scales including Metric Scales)
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