OPERATION 5
en-31
How to calculate a slope:
Tools Required:
Level
(A)
, either 1 yard, or 1 meter long.
Tape measure
(B)
.
With the level
(A)
positioned horizontally, measure the
distance
(C)
with tape measure
(B)
. Use the chart to
calculate either the slope angle or the % grade of the
slope
(D)
.
Figure 5D
C
A
B
D
Height (C)
Result (D)
Inches with 1 Yard Level (A)
Millimeters with 1 Meter Level (A)
Slope in Degrees
Slope Grade %
3
4.8
8.3
100
5.7
10.0
150
8.5
15
6
9.5
16.7
200
11.3
20.0
7.5
11.8
20.8
225
12.7
22.5
9
250
14
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
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
36
1000
45.0
100
Summary of Contents for R311T-T4I
Page 63: ...NOTES 11 en 63 11 NOTES ...
Page 125: ...REMARQUES 12 fr 63 12 REMARQUES ...
