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Instructions for Use of Rapid Rule Scale.

Before we tell you how easy it is to use a Rapid Rule, perhaps a word about scale rulers in general is in order. If you look at a road map, you'll see a small diagram that shows you what distance on the map represents a mile or more. This is the scale of the map, and it's needed since it would be difficult to fit the entire state of Indiana (for instance) on a single piece of paper!

The same is true for construction and manufacturing drawings or plans. You'll usually find a scale notice (often next to the name of the drawing) to indicate what distance is represented by each inch on the drawing. For instance, a typical architectural drawing might state that the scale is 1/4 which means that one inch on the plan equals four feet of actual distance. To measure any object on a scale drawing, an accurate scale rule is essential. And that's what you have with a Rapid Rule.

Take a close look at Rapid Rule's Scale Ruler. It is obvious from a glance that it is a professional quality, precision instrument. The aluminum construction is very robust. Edges are crisp and clean, and carefully polished. This rule is designed to last for years.

Using a Rapid Rule is simple. In the case of the Architectural model, one edge is a standard ruler divided into 32nds. The Engineering model ruler is divided by 50 parts of an inch while the Metric model ruler is divided by 1 mm. Since all of these models share the same design we'll use the Architectural model to discuss their use.

The other edge of the Rapid Rule's ingeniously simple design ends the confusion and frustration of typical old-fashioned "triangle" scales. You'll find one set of divisions with a small rod directly above it. Turn either end of this patented scale rod, and up to six different scales are immediately ready to use. No flipping, flopping, or hunting for the right scale edge to use. And no backwards-reading scales. Instead, you see just one scale at a time.

Every scale reads from left to right, and they all use the same edge divisions. Nothing could be simpler or faster to use. And note that the selected scale stays firmly in place. No matter how often you pick up the Rapid Rule the chosen scale is always ready to use.

To use Rapid Rule scale ruler, simply glance at the drawing or plan you wish to measure, and set the scale rod to the same ratio shown on the drawing. In the case of the Architectural model you can choose between 1/16" = 1 foot, 1/8" = 1 foot, 1/4" = 1 foot, 1/2" = 1 foot, 3/16" = 1 foot, and 3/8" = 1 foot. Of course each inch on the drawing can also represent some other measure. It can stand for a yard, a mile, or even a furlong! Whatever your choice, the ratio remains the same.

If you are creating a new plan or drawing, simply select the scale that will allow the entire drawing to fit on the paper size you are using. Determine the maximum dimension to be shown on the drawing, and turn the scale rod until that maximum number fits easily on the paper. Then use the selected scale divisions just like an ordinary ruler. The Rapid Rule will automatically scale each dimension to whatever ratio you have selected. No need to figure in your head how long 19' 6" should be on your drawing, for example.

Rapid Rule has been created for long useful life and ease of use. Take a close look at the edges and the bottom of the Rapid Rule. Note the raised inking edges. These reduce ink smearing for clean, crisp lines. And the sculptured arch on the bottom of the Rapid Rule also reduces the chance of smearing fresh drawings. It even feels nice!

Each Rapid Rule is made in the U.S.A. of solid extruded aluminum. It is built to easily outlast normal plastic rules, and is much more resistant to nicking of the edges. (How many times have you had to hunt for a smooth edge just to draw a simple straight line with a plastic or wooden rule?) And this dimensionally-stable material assures that the accuracy of each Rapid Rule is maintained. Our rules are accurate to +/- 0.006" and are checked during manufacture against international standards.

There are no special precautions needed to keep your Rapid Rule in good condition. Don't use a harsh abrasive or solvents to clean it, or the markings may become harder to read! Just warm water and a clean, soft rag should be sufficient to keep it looking like new for years.

There are just four parts to a Rapid Rule. The aluminum body, the scale rod, and the two small "O" rings that hold the rod in place. If an "O" ring is lost or damaged, just drop us a line and we'll be happy to drop a new pair in the mail at once.

Thank you for selecting Rapid Rule. We're certain you'll find Rapid Rule the easiest scale you've ever used.

Architectural Scales
A-6", A-12" or A-18"
1/16, 1/8, 1/4, 1/2,
3/16, 3/8
Engineering Scales
E-6", E-12" or E-18"
10, 20, 30, 40,
50, 60
Metric Scales
M-6", M-12" or M-18"
1:2.5, 1:5, 1:10,
1:20, 1:50, 1:100

Customer Services

  extra color imprint
  PMS color matching

free shipping worldwide
  artwork preparation
  paper proof
  pre-production sample

free spec sample

US$              Imprinted & Delivered           3-5 Days
18" models
12" models
6" models
Imprint Area:
1/2" x 6" or 12"

Contact Us

Rapid Rule Co., Inc.    69159 Pine Rd., North Liberty, IN 46554
Ph: 574-784-2273     email: doug@rapidrule.com