Calculated Industries Construction Master III User Manual page 11

RIGHT ANGLE SOLUTIONS
[Pitch] Pitch is the amount of "Rise" in 12
inches of "Run" in a right triangle.
Pitch is most commonly expressed
in inches — i.e., "9 inches of Pitch"
or a "9-in-12 Pitch" — but can be
entered in either decimal (i.e., .75
[Pitch], or 75 [%] [Pitch] for a Percent
Grade) or dimension format.* In
addition, the Pitch can be calculated
given any two sides of a right tri-
angle — Rise, Run or Diagonal.
[Rise] This is the up-side or vertical leg of
a right triangle. This can be entered
or calculated; the latter if you enter
the two other sides or one other
side and the Pitch.
This is the base-side or horizontal
[Run]
leg of a right triangle. This can be
entered or calculated; the latter if
you enter the two other sides or one
other side and the Pitch.
[Diag] Diagonal — This is the angled side
or hypotenuse of a right triangle.
While this can be either entered or
computed, it is most often calcu-
lated
"squaring up a room" or finding a
stringer or rafter length.
* While entering 9 [Inch][Pitch] is the same as [.] 75 [Pitch]
(because 9 ÷ 12 = .75), entering 9 [Pitch] will give you the
equivalent of 108 inches of Pitch (as 9 x 12" = 108") and
you should therefore use caution when entering non-
dimensioned values for Pitch.
for such applications as
User's Guide — 11