Manual

70 — CONSTRUCTION MASTER

PRO
Regular (45°) Hip/Valley and Jack Rafters (not avail-
able on LT)
You’re working with a 7/12 pitch, and half your total span is 8 feet 5
inches:
(1) Find point-to-point length and cut angles for the Common rafter;
(2) Find the length and cut angles of the adjoining Hip (or Valley) and;
(3) Find the regular Jack rafter lengths and cut angles (Jack rafters at
16 inches on-center spacing).
Keystroke Display
1. Find Common rafter length and Plumb and Level cuts:
[On/C] [On/C] 0.
[Conv] [1] (Temporarily sets fractional setting to 1/16)* 0.
8 [Feet] 5 [Inch] [Run] RUN 8 FEET 5 INCH
7 [Inch] [Pitch] PTCH 7 INCH
[Diag] DIAG 9 FEET 8-15/16 INCH
[Diag] PLMB 30.26°
[Diag] LEVL 59.74°
2. Find Hip/Valley rafter length and cut angles:
[Hip/V] H/V 12 FEET 10-1/2 INCH
[Hip/V] PLMB 22.42°
[Hip/V] LEVL 67.58°
[Hip/V] CHK1 45.00°
þþ *Note: If using the Trig Plus III, you may obtain the same answers
(displayed in fractional accuracy of sixteenths versus sixty-fourths)
by pressing [Conv] [1] as indicated, or by changing the Preference
Setting by pressing [Conv] [Stor], then [+] until 1/16 is shown in the
display.
(Cont’d)