Well this scale is tinier than the last one, and it doesn’t seem to have as many marks. Last time we said that each mark represented one inch. Lets take a close look at the 12 inch ruler here and see what each mark means. 12) Now remember that we said that the inch part of an architects scale is just a 12 inch long ruler that has been shrunk down to the scale you are using. On this one, the inch part is on the left and the feet are on the right. Notice that this scale is at the other end of the ruler. Let’s look at a 1/8 of an inch equals a foot. Let’s see…one two three four five six seven eight nine ten eleven twelve. Look closely and count the number of marks on this teeny tiny 12 inch ruler. Now remember that I said that the inch part of the ruler is just an ordinary 12 inch long ruler that has been shrunk down o the scale you are using? Well with this scale it is easy to see that. Let’s look at the inch part of the scale first. You see that this scale is labeled “one quarter.” This means that you use this scale on drawings that are drawn to a scale of one quarter inch equals a foot - like our cabinet drawing. 06) First, we want to be sure we are using the right scale. The hardest part is figuring out what each small mark means. One of the keys to understanding a scale like this is to see that the part where you get the inches (the end with the small marks) is really just an oridinary 12 inch long ruler that has been shrunk down to the scale you are using. On one side of this zero is where you measure the feet, and on the other side is where the inches come from. On an architects scale, there are different marks for the foot and the inch parts of the measurement. Architects scales are designed to work with scaled drawings. When we use a scale like this, we don’t need to do any calculations. To get an exact measurement we would need to do some calculations. ![]() If you measured the the drawing of the cabinets with a regular ruler, you would see that they would be a little longer than 3 inches wide. ![]() The cabinets on the drawing are 12 feet 8 inches wide. In this case, a quarter inch on the drawing represents one foot in real life. ![]() You see, architectural drawings like house plans are drawn to a particular scale. The type of architect’s scale we’re going to look at is used to make measurements on a drawing that is dimensioned in feet and inches, like architectural drawings. In the video, Bob and Sparky break down the basics of using an architect’s scale. Architect’s scales are used on scale drawings.
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