Calculated Industries 4030 User Manual page 23

Subsequent presses of the [Hip/V] key will also display Plumb,
Level, and Cheek cut angle values in degrees.
[Conv] [Hip/V] — Irregular Pitch
Enters the irregular or secondary pitch value used to calculate
lengths of the irregular Hip/Valley and Jack rafters.
You may enter the irregular pitch as:
a dimension: 9 [Inch] [Conv] [Hip/V]
an angle: 30 [Conv] [Hip/V]
a percentage: 75 [%] [Conv] [Hip/V]
þ þ
Note: An entered irregular pitch can be recalled by pressing [Rcl]
[Conv] [Hip/V].
[Jack] — Jack Rafters
Finds the descending Jack rafter sizes for regular pitched roofs,
based on the stored on-center spacing and previously entered or cal-
culated right triangle/rafter values (e.g., pitch, rise, run).
The default on-center spacing is 16 inches. A new on-center
spacing may be entered and permanently stored by pressing
an inch value and [Stor] [7] (e.g., 12 [Inch] [Stor] [7]). The cur-
rent on-center spacing value can be viewed by pressing [Rcl]
[7].
Repeated presses of the [Jack] key will display all the rafter
sizes (on the regular pitch side) as well as display the Plumb,
Level, and Cheek cut angle values. Additional presses will dis-
play the rafter sizes on the irregular pitch side (if an irregular
pitch was entered; see above), or repeat the previously dis-
played values.
þ þ
Note: You may set your calculator to display the Jack rafter lengths
in either ascending or descending order (see Preference Settings on
page 96).
þ þ
Note: You may program your calculator to "mate up" the Jack rafters,
rather than using the entered or default on center for both sides (see
Preference Settings on page 96).
User's Guide — 21