Theatre Design & Technology - Winter 1978 - 13

A Practical Example
To fully appreciate the practicality and simplicity of this
system, you should try putting it to use. The following stepby-step description makes use of the simplified setting
created for the Illustrations in this article. As you construct
your own perspective view of this setting, you can easily
check the rationale for each step by referring back to the
appropriate illustrations. Also, you can check the accuracy of
your results against the perspective view in Figs. 15 and 16.
Start with the floorplan and sectional elevation in Fig. 17.
The grid is in 2' modules. You will notice that we have established a horizon line height of 4'.
f- --.

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Figure 178

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The proscenium is 16' from the centerline, and 1W thick.
16
s' = sId X d' - 40 + 1lh X 100 = .3855 X 100
NOTE: (d) Is the total of observer distance (40') and upstage distance.
Simply enter the across-stage distance (16') into your calculator, and divide by the total of observer distance and
upstage distance (41.5). Mentally multiply by moving the decimal two places to the right and you have 38.55 which is the
measurement on the 50 scale of the triangular rule. (If you are
doing a W' scale drawing, it would be 3.855 on the 10 scale.)
NOTE: You can use any measuring scale you wish: If you
use the 60 scale, the drawing would be 8W' X 13%", to be
viewed from 16%" away, and would be in 5/12" = l' scale.
Ifs the unreasonable quality of the resulting scale that
cautions against such odd combinations of observer distance and measuring scale.
So far we have determined that the upstage edges of the
proscenium opening will appear 38.55" left and right of the
centerline. The top of the proscenium is 16' above the horizon
line, so we are dealing with exactly the same measurement
we had on the sides.
Lines which establish the top and bottom corners of the
proscenium on either side (where the side thickness meets
the overhead thickness, and where the side thickness meets
the stage floor) are drawn to line up with the center vanishing
point (the intersection of the horizon line and the centerline).

We are still 16' from the centerline, but are now 2W upstage.
16
s' = sId X d' = 42.5 X 100 = 37.65

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Figure 17b

Next, select an observer distance with its associated viewIng distance, measuring scale, and draWing scale (see chart,
Fig. 10). For our example, a 40' observer distance was selected. If you follow the suggestions in the chart, you would
use the fifty-to-the-inch measuring scale and end up with a
draWing In W' scale.
NOTE: If you want a smaller drawing, in W' scale, to be
viewed from a distance of 10" rather than 20", you will need
a measuring scale with 100 divisions to the inch. For this
purpose, you can use the 10 scale of a triangular rule and
estimate the subdivisions smaller than 1/10". In fact, the
original draWing used for Figs. 15 and 16 was constructed
this way. The result is a draWing 5" X 8" that is quite
manageable on a single sheet of typing paper or small
format draWing paper. The comparable draWing In W'
scale would be 10" X 16".
USITT/Wlnter, 1978

STEP A: UPSTAGE EDGE OF THE
PROSCENIUM OPENING

STEP B: DOWNSTAGE RIGHT AND DOWNSTAGE
LEFT CORNERS OF THE SET

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Start by laying out a rectangle to represent the 20' X 32'
proscenium opening. As noted above, this will be either 5" X
8", or 10" X Hi", depending on scale. Then establish the 4'
horizon line and a vertical centerline. These are the main coordinate lines from which you will measure to locate the
points calculated.

The edges of the set (where side walls meet tormentor flats)
will be 37.65 from the centerline. The bottoms of these corners are on the floor, or 4' below the horizon line.
4
s' = sId X d' = 42.5 X 100 = 9.41
This means the bottom corners of the downstage edges of the
set will be 9.41 below the horizon line. The tops of the flats
are 10' above the horizon line, so:

s' = sId X d' =

4~~5

X 100

= 23.53,

meaning that the tops of these corners will be 23.53 above
the horizon line.

STEP C: UPSTAGE LEFT AND UPSTAGE RIGHT
CORNERS OF THE SET
These corners are 12' from the centerline and 16W upstage.
s' -- sId X d'

=.-1L
56lh X 100 = 21 .24
Theatre Design & Technology

11



Table of Contents for the Digital Edition of Theatre Design & Technology - Winter 1978

Contents
Theatre Design & Technology - Winter 1978 - 1
Theatre Design & Technology - Winter 1978 - 2
Theatre Design & Technology - Winter 1978 - 3
Theatre Design & Technology - Winter 1978 - Contents
Theatre Design & Technology - Winter 1978 - 5
Theatre Design & Technology - Winter 1978 - 6
Theatre Design & Technology - Winter 1978 - 7
Theatre Design & Technology - Winter 1978 - 8
Theatre Design & Technology - Winter 1978 - 9
Theatre Design & Technology - Winter 1978 - 10
Theatre Design & Technology - Winter 1978 - 11
Theatre Design & Technology - Winter 1978 - 12
Theatre Design & Technology - Winter 1978 - 13
Theatre Design & Technology - Winter 1978 - 14
Theatre Design & Technology - Winter 1978 - 15
Theatre Design & Technology - Winter 1978 - 16
Theatre Design & Technology - Winter 1978 - 17
Theatre Design & Technology - Winter 1978 - 18
Theatre Design & Technology - Winter 1978 - 19
Theatre Design & Technology - Winter 1978 - 20
Theatre Design & Technology - Winter 1978 - 21
Theatre Design & Technology - Winter 1978 - 22
Theatre Design & Technology - Winter 1978 - 23
Theatre Design & Technology - Winter 1978 - 24
Theatre Design & Technology - Winter 1978 - 25
Theatre Design & Technology - Winter 1978 - 26
Theatre Design & Technology - Winter 1978 - 27
Theatre Design & Technology - Winter 1978 - 28
Theatre Design & Technology - Winter 1978 - 29
Theatre Design & Technology - Winter 1978 - 30
Theatre Design & Technology - Winter 1978 - 31
Theatre Design & Technology - Winter 1978 - 32
Theatre Design & Technology - Winter 1978 - 33
Theatre Design & Technology - Winter 1978 - 34
Theatre Design & Technology - Winter 1978 - 35
Theatre Design & Technology - Winter 1978 - 36
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https://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_1966Dec
https://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_1966Oct
https://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_1966May
https://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_1966Feb
https://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_1965Dec
https://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_1965Oct
https://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_1965May
https://www.nxtbookmedia.com