© 2022 Johnson Level & Tool — 4
GETTING STARTED
RIGHT TRIANGLE/ROOF FRAMING KEYS
Pitch Key
: This key is used to enter or
calculate the Pitch (Slope) of a roof (or Right
Triangle) . Pitch is the amount of “Rise” over
12 Inches of “Run .” Pitch may be entered as:
a Dimension
8
Inch
Pitch
an Angle
3
0
Pitch
a Ratio
0
•
7
5
Conv
Pitch
a Percentage
7
5
%
Pitch
A Pitch entry will remain in permanent storage until
revised or reset . A solution will be replaced by its entered
value once the calculator is cleared .
Enters Pitch Ratio (e .g .,
•
5
8
3
Conv
Pitch
) .
Rise Key
: Enters or calculates the Rise or
vertical leg (height) of a Right Triangle .
Run Key
: Enters or calculates the Run or
horizontal leg (base) of a Right Triangle .
Diagonal Key
: Enters or calculates the
common or Diagonal leg (Hypotenuse) of
a Right Triangle . Typical applications are
“squaring” slabs or finding common
rafter lengths .
Hip/Valley Key
: Calculates length of the
Regular or Irregular Hip/Valley rafter .
Pitch
Rise
Run
Diag
Hip/V
Conv Pitch
