7
OPERATION
Use Either of these columns but not both
Height C in inches
measured with a 1 yard
horizontal edge A
3
6
7.5
9
10
11
12
13
14
15
16
18
20
25
30
36
en-32
SAFETY, OPERATORS & MAINTENANCE MANUAL
The result of what you are measuring
Height C in millimeters
measured with a 1
metre horizontal edge
A
100
150
200
225
250
275
300
325
350
375
400
425
475
500
600
800
900
1000
Slope Angle D
measured in Degrees
4.8
5.7
8.5
9.5
11.3
11.8
12.7
14.0
15.4
15.5
16.7
17.0
18.0
18.4
19.3
19.9
20.6
21.3
21.8
22.6
23.0
24.0
25.4
26.6
29.1
31.0
34.8
38.7
39.8
42.0
45.0
JACOBSEN TR3
Slope Angle D
measured in Grade%
8.3
10.0
15.0
16.7
20.0
20.8
22.5
25.0
27.5
27.8
30.0
30.6
32.5
33.3
35.0
36.1
37.5
38.9
40.0
41.7
42.5
44.4
47.5
50.0
55.6
60.0
69.4
80.0
83.3
90.0
100.0