Operation Manual

en-69
OPERATION 7
7.13 SLOPE CALCULATION CHART __________________________________________
Use Either of these columns but not both The result of what you are measuring
Height ‘C’ in inches
measured with a 1 yard
horizontal edge ‘A’
Height ‘C’ in millimeters
measured with a 1 metre
horizontal edge ‘A’
Slope Angle ‘D’
measured in
Degrees
Slope Angle ‘D’
measured in
Grade%
34.88.3
100 5.7 10.0
150 8.5 15.0
6 9.5 16.7
200 11.3 20.0
7.5 11.8 20.8
225 12.7 22.5
9 250 14.0 25.0
275 15.4 27.5
10 15.5 27.8
300 16.7 30.0
11 17.0 30.6
325 18.0 32.5
12 18.4 33.3
350 19.3 35.0
13 19.9 36.1
375 20.6 37.5
14 21.3 38.9
400 21.8 40.0
15 22.6 41.7
425 23.0 42.5
16 24.0 44.4
475 25.4 47.5
18 500 26.6 50.0
20 29.1 55.6
600 31.0 60.0
25 34.8 69.4
800 38.7 80.0
30 39.8 83.3
900 42.0 90.0
36 1000 45.0 100.0