#### Transcript of Scenic Design: Scale and Reading an Architect's Scale

Scale Drawing and

Using an Architect's Scale

Scale: an exact ratio of dimensions in a drawing

In other words, the dimensions of the DRAWING are in exact proportion to the dimensions of the REAL THING.

For example, think of a map:

An inch

on a map

could represent...

**... 500 MILES in real life!**

**So how does scale work?**

It's all about proportions!

Let me give you a real-world example...

Here's the box model I made of the O'Brien Center:

I measured the height of the real proscenium arch in the theatre. It is 14 feet tall.

14'

But I didn't know how wide the arch was at the top.

???'

So, I found a picture of the proscenium arch online....

I used a ruler to measure the height of the arch in the picture...

1 3/4"

1/2"

And measured the thickness of the arch (the dimension I'm looking for)...

**Then I took the real-life measurements**

**and the measurements from the photo**

**and created a proportion...**

**x'**

**14'**

**1/2"**

**1 3/4"**

**=**

Real Proscenium

Dimensions

Photo Proscenium

Dimensions

(height)

(thickness)

**=**

(14')

(14')

**Then solve for X **

x =

(.5) (14)

1.75

=

**4'**

But if a scenic designer needed to do that kind of math every time he or she drew a line on the ground plan, the set would NEVER get designed in time!

But thankfully, there is an EASIER way!

**Introducing the Architect Scale Ruler!**

**16: regular US ruler**

**Other sides have different scales**

**11 different scales in one!**

The numbers at the edge indicate the scale.

For example, 1/8" = 1'-0"scale means that every 1/8" you draw equals 1 foot in the scale. (Remember the map example? This would be like 1/8" on the map equals 1 mile in real life)

0 1' 2' 3' 4' 5'

**Careful! Each scale edge has two different scales on top of each other!**

**This means for some scales you need to read right-to-left, rather than left-to-right.**

1/4" = 1'-0" Scale

4' 3' 2' 1' 0'

2'-6" 1'-6" 6"

These numbers are from the scale at the other end of the ruler.

What are these marks?

3/8" = 1'-0"

1'

1" 3" 6" 10"

**NOW...**

Let's practice!

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