Huawei DBS3900 Installation Manual page 299

Figure 1-2 Hoisting heavy objects
Ladder Use Safety
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Figure 1-3 Ladder tilt angle
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Before using a ladder, check whether the ladder is intact and confirm its load bearing
capacity. Do not use it with overload.
The recommended angle between the ladder and the ground is 75° . You can use a right
angle to measure the angle, as shown in Figure 1-3. Place the wider ladder legs at the
bottom or take protective measures at the bottom to avoid skid. Place the ladder on a
stable surface.
Pay attention to the following points when climbing a ladder:
− Prevent your center of gravity from deviating from the ladder edge.
− Keep your body stable before climbing to ensure safety.
− Do not climb over the fourth beam from the ladder top.
Safety Information