According to the national standard "Classification of Work at Height", "Any work at height more than 2m (including 2m) from the reference plane of falling height is called work at height". In the process of building construction, there are often operations such as edge-facing, hole-opening, climbing and hanging. , are higher than 2 meters, falling from a height accident is also very common. This specification is aimed at the operation of these parts, and puts forward safety protection measures. Its contents include:

(1) Safety protection for edge and hole operations: the height, setting principle and calculation method of protective railings are specified.

(2) Safety protection for climbing and suspended operation: the use and requirements of climbing facilities and the principles that should be observed for independent suspended operation are specified.

(3) Safety protection of operation platform and crossover operation: the protective measures and safety interval distance of crossover operation are specified.

(4) Acceptance of safety protection facilities for working at heights.

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