Common Rafter
You have a rise of 6 feet 11 inches and
a run of 14 feet 6 inches. Find the com-
mon rafter length.
Steps
Keystrokes
Display
Reset
[Conv] [x]
0.
calculator
1 — Find 1st side (a)
Enter rise
6 [Feet] 11 [Inch]
[Conv]
[
]
47.84028
SQ FEET
Put in memory [M+]
M
47.84028
SQ FEET
2 — Find 2nd side (b)
Enter run
14 [Feet] 6 [Inch
[Conv]
[
]
M
210.25
SQ FEET
Put in memory [M+]
M
210.25
SQ FEET
Recall total
[Rcl] [M+]
memory
M
258.0903
SQ FEET
3 — Solve for 3rd Side (c)
Find common rafter length
[
]
M
16 0-13/16
FEET INCH
a
b
c
a
2
b
2
+
= c
2
= c
a
2
b
2
+
User’s Guide – 35