Snorkel TB65J - Manual (Page 52)

Chapter 8 – Operation
48 TB65J – 0084248
Danger
The aerial platform can tip over if it becomes unstable.
Death or serious injury will result from a tip-over ac-
cident. Do not drive on slopes that exceed the grade
capability of the machine, or where conditions of the
slope could cause driving to be hazardous.
Place the drive range switch in the low position before
attempting to drive the machine on a slope.
Drive the aerial platform only on slopes, or loading
ramps that are within the grade capability of the aerial
platform.
Calculate the percent grade:
• before attempting to climb an unknown grade
• if it is believed that there is a malfunction to determine
if the slope is within the actual grade capability of the
aerial platform.
Calculating Percent Grade
The percent grade equals the height (rise) of the slope di-
vided by the length (run) times 00. Refer to Figure 8.6.
Figure 8.6 – Percent Grade Formula
The grade can be measured with an inclinometer or by
using a tape measure, a level, and a straight 2x4. If us-
ing an inclinometer, refer to the conversion diagram if
necessary.
To measure the grade without an inclinometer, use the
following procedure.
. With the 2x4 laying parallel with the slope, lay the
level lengthwise on the 2x4.
2. Holding the downhill end, raise the 2x4 until the
level indicates that the board is level (refer to Figure
8.7).
Length
Height
Length
Height
% of Grade = x 100
Figure 8.5 – Slope Percent/Degree Conversion
Percent of
Grade
Angle of Slope
in Degrees
45°
40°
30°
35°
25°
20°
5°
0°
5°
5%
0%
5%
20%
25%
30%
35%
40%
45%
50%
55%
60%
65%
70%
75%
80%
85%
90%
95%
00%
0