User Manual

18 — C

ONSTRUCTION

ASTER

/ T

RIG

/ D

ESKTOP

Ç p

Pitch Ratio or Slope

— Enters the

pitch

as a ratio

slope

of a roof (or right triangle). For example,

0.58 slope is entered as • 5 8 Ç p.

r Enters or calculates the

rise

or vertical leg (height)

of a right triangle.

R Enters or calculates the

run

or horizontal leg (base)

of a right triangle.

Diagonal

— Enters or calculates the

diagonal

leg

(hypotenuse) of a right triangle. Typical applications

are “squaring up” slabs or finding common rafter

lengths. Additional presses of the d key will also

display plumb and level cut angles in degrees.

Note: The Common rafter calculation is the “point-to-point” length

and does not include the overhang or ridge adjustment.

Hip/Valley and Jack Rafter Keys

The

Construction Master Pro

uses the rise, run, diagonal, pitch and

on-center spacing values to calculate

regular

and

irregular

hip/valley

and jack rafter lengths (excluding wood thickness, etc.).

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