![]() You might be wondering which scale to use. Next we will look at the 1:200 scale ruler. Hopefull this is making sense at this stage. So if we draw from 0 to 6 on a piece of paper we could fit the line on a piece of paper 60mm wide (6cm) If we look at our 1:50 scale ruler, 300 lines up with number 6 on the ruler. We either need a piece of paper 300mm wide, or scale the measurement down so it fits on a smaller piece of paper. So we could easily draw a line that length on paper 100mm wide (10cm or 10 on the ruler)Īnother example, say we measure a wall 300mm wide in real life, and want to draw it on paper. The 500 represents 500mm, so exactly 1/2 metre. If we use the 1:50 scale ruler, we could measure from 0 to 10 on the ruler to get 500. We would also need a piece of paper at least 1/2 metre (500mm) wide in real life meaurements. Going back to my example of the wall earlier, lets imagine this time we measured a 1/2 metre long wall (500mm), so we would need a 1/2 metre long ruler. What these numbers means are for every 1 unit = 50 units (or in this case 1mm = 50mm) 1:50 and 1:200 in the bottom left corner of each image of the ruler. You will notice the different numbers in red So the number 1 on the ruler would be 10mm (or 1cm)ġ metre (m) = 100 centimetres (cm) = 1000 millimetres (mm)īelow are the differences between the normal ruler and a certain scale. The Typical ruler each black line equal 1mm in real life length. As I mentioned before, a proper scale ruler will already be adjusted so you don't need to do this. They look like a normal ruler you would have seen but have different increments, and spacing between increments.įig.1 below is a Typical Ruler, and I am going to show you how to use a normal ruler to work out the scale. Techical drafting people usually use specially designed rulers called scale rules or line gauges. We take one length, then convert it into a smaller size (in this case), then draw a smaller line to represent it. In this instance, we can use a piece of paper then draw a line on it that represents the 2 metre long wall, but only aįraction of the size of the life size wall. and in Australia we use the measurements in millimetres (mm).įor instance, if you measure up your house then went to draw it on a piece of paper, if you measured a 2 metre long wall, then you would need to have a big piece of paper just to draw it on there. A scale drawing is a drawing of something that is 'scaled' so that the drawing fits on a piece of paper that can then be given to people such as builders, trades people etc. This table lists some common scale factors you may come across when dealing with different types of models.HOW TO SCALE ARCHITECTURAL BUILDING PLANSĪll technical drawings use what are called scale drawings. Scale factors for common engineering scales Drawing Scale For instance, a scale factor of 1/10 can be rewritten as 1:10. ![]() Step Three: Rewrite the Fraction as a Ratioįinally, rewrite the fraction as a ratio by replacing the fraction bar with a colon. Our fraction simplifier can help with this step if needed. Again, this may not result in whole numbers, so adjust accordingly. You can do this by dividing both the numerator and the denominator by the numerator. If you’re scaling down, then reduce the fraction so that the numerator is 1. If it’s not desired, then simply reduce the fraction like you would normally. This may or may not be desired, depending on your use case. Note: by doing this, the numerator may become a decimal. To do this, divide both the numerator and the denominator by the denominator. ![]() To find the final scale factor when you’re scaling up, reduce the ratio to a fraction with a denominator 1. If you’re scaling up, that is, if the scaled size is larger than the actual size, then the ratio should be shown with a denominator of 1. If you’re scaling down, that is, if the scaled size is smaller than the actual size, then the ratio should be shown with a numerator of 1. The next step is to reduce or simplify the fraction. ![]() So, the scale factor is a ratio of the scaled size to the real size. Since the scale factor is a ratio, the first step to finding it is to use the following formula: ![]()
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