Don’t be afraid of the unusual scales on an architect scale ruler. It might have 4
scales, but you will only need to use one of them for a particular drawing. Let’s make one example. Take a look at the w906a Architects Scale Lufkin Tape. It has 2 scales. One is 1/8 and the other is 1/4. Let’s say that the drawing in front of you is drawn to the 1/4 scale. It says this in the information box at the bottom. The 1/4 means that 1/4 inch on the drawing represents 1 foot in real life. In this case we will ignore the 1/8 scale and use only the 1/4 scale. Set your zero mark at the corner of some part of the drawing. The other corner is even with the 9 mark. That means it is 9 feet long. It’s really that simple.