How to judge whether it is "the height where it is possible to fall"

For the definition of high work, we have some doubts and help explain it. Work at high altitudes GB/T 3608 - 2008 High altitude operations: Work at heights that may fall 2m or more above the height of the descent plane.

Scenario 1: Suppose there is a 4-meter-high working platform (the bottom has wheels that can be moved and it is fixed when working), and there are 1.05-meter or 1.5-meter or 2.5-meter-high fences around the top of the platform. In this case, the person may fall. Very small, especially the 2.5-meter-high fence, it is almost impossible for people to fall from the platform. At this time, is the platform still "highly likely to fall?" Is the job on the platform high at this time? If the guardrail is 1.5 meters high, the possibility of falling is very small, but it is also possible to fall. Is it high work at this time?

Scenario 2: Suppose the worker is working with a lift truck. The lift truck can be raised to a maximum height of 8 meters. There are guard rails around. Is it high work at this time?

Expert answers:

GB/T 3608 - 2008 "Classification of work at heights" stipulates that work should be performed at a height that may fall 2m or more above the height of the descent plane. The two conditions in the definition (1, 2m and above. Second, it is possible to fall) are at the same time only meet the high work.

The first condition is obvious and needless to say. The second condition is to consider whether the operating environment is likely to fall. The problem of working at height but without falling is not within the scope defined by work at height. For example, in the interior of a high-rise building, it is impossible to fall. It does not belong to high places.

How to determine whether it is "a height that may fall?" Specific analysis.

According to your hypothetical situation 1: Assume that there is a fixed platform with a height of 4 meters. There are fences with a height of 1.5 meters or 2.5 meters around the top of the platform. In this case, the probability of a person falling is very small, especially 2.5 meters high. In the column, it is almost impossible for people to fall from the platform. This kind of platform is not "the heights that are likely to fall." At this time, working on the platform is not a high job. If the guardrail is 1.05 meters high, because the operator's center of gravity may be higher than the guardrail, there is still the possibility of falling, this time is a high work. If you assume that you have a mobile platform with a wheel at the bottom that can be moved and fixed during operation, you must also consider the possible problem of overturning the platform, and you may also have a chance of falling.

Similarly, Scenario 2: Assume that the worker is working with a lift truck. The lift truck can be raised up to 8 meters high with a protective fence around it. However, the lift truck has the possibility of overturning. The operator may fall and this is a high altitude operation. .

In short, in addition to the working height of 2m or more, it is mainly to consider whether there is a possibility of falling. This is the key to understanding this definition.

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