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Scale drawings - how do you use scales

  • 25-10-2005 8:52pm
    #1
    Rudolph Claus
    Closed Accounts Posts: 1,060 ✭✭✭


    Can someone help me please.
    Right, im having trouble understanding different scales, ect...

    Say i want to draw the front of a house which measures 13.4metres in reallife. I want to draw it on my page at scale 1:50.

    Ive a scale ruler but i cant seem to grasp the whole concept of scales. On the scale ruler theres the 1:5 scale and on the same bit of the ruler is the 1:50 scale. Now, 1:50 is the same as 1:5, you just add on an extra zero??? I dont get this?

    Can someone tell me what 13.5m is in 1:50 scale measuring off in centimeters on an ordinary centimetre ruler. Is it 26.8cm?

    Also, is it correct to say that the larger the number your scaling to, the smaller the drawing will be. So if i draw it in scale 1:5 it`ll be way bigger than if drawn in scale 1:200?

    Anyone know of any good books i can get to learn all this from the basics. Im doing a lot of tech drawing at college having never done it at school and i seem to have a mental block when it comes to scaling.


Comments

  • #2
    MadMoss
    Registered Users Posts: 86 ✭✭MadMoss


    Howdy,
    Scales can be a bit tricky at first esp. when dealing with the AutoCAD enviorment for the first time.
    Anyways, the trick is to see the scale u are using as a dividing number. Say u are using 1:50, this represents that one unit drawn (say 1m) is the equivilent of 50 units (in this case 50m).
    Therefore, to convert any length using your scale u divide by 50.
    For example, take the measurement 13.5m. To convert this to a scale of 1:50 we divide by 50 giving us 0.27m (or 27cm).
    If we convert the same lenght 13.5m using a scale of 1:200. 13.5/200 is 0.0675m (6.75cm). As u can see the larger the scale number the smaller the physical dimension on your sheet.
    Hope this helps.


  • #3
    Nukem
    Registered Users, Registered Users 2 Posts: 4,082 ✭✭✭Nukem


    LOL had a big explanation written out and the realised even i was confused.
    Click this (link)

    13.4m into mm(1000) or cm(100) ->scale 1:1000 - 13400/1000-13.4mm on page is 13.4m in real life. scale 1:100 - 1340/100-13.4cm on page is 13.4m in real life.....etc......(try keep it to 100's or 50's if your confused) So 1:50 - 13400/50=268mm - 268/13.4=20mm for every metre in real life. Draw a line 100mm long in scale 1:50 and thats 10m.

    Nukem


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