Reading and Applying Scale

Reading and Applying Scale

• 1.
  Lesson 2 –Reading & Applying Scale Right Click your Mouse to work your way through each slide M. S. Martin – August 2011 Images used in this slide show were obtained from Google Images – Google.com.au
• 2.
  Typical Scales • Oneof the most important things to understand is • Scale drawing is a reduction of a full size building so it can fit on the page. • Stick to pre-determined scales rather than calculated ones • The easiest way to understand scale, is to think of it as a “fraction”. • For example, 1:5 scale – each 1mm increment on the rule represents 5mm in real size. Or 5 x the size, therefore 1/5th the actual size is shown on rule
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  Mathematical Explanation
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  Now Lets lookwith the scale rule • The rule does the work for us • Remember we are using a scale of 1:20 • So each 1mm increment on the rule represents 20mm in real life • Knowing this combined with the 200mm graduations already shown on the rule, it is simple • The red lines represent where we need to measure • Now click to show the rule and you will see how this works
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  Now lets lookat some plan examples • This is a detailed drawing of a slab • It says drawn at a scale of 1:10 • So every 1mm increment on the rule represents 10mm in real life • Red lines will indicate a measurement • Now if the measurement wasn’t there, lets look how the scale rule again will show us the measurement
• 6.
  An Exercise • Nowthat you know how the scale rule works, look over the plans in your folder and check some measurements with your own scale rule to see how it works. • When Drawing your own jobs, the process is simply reversed. Take the measurements you want full size, and draw them to a suitable scale on your drawing paper. End of slide show