机械安全 接近机械的固定设施 第4部分：固定式直梯 (GB17888.4-2020)

4.2.1 坠落保护装置的必要性

如果坠落高度大于或等于3000mm，则应为直梯配备坠落保护装置。

Safety of Machinery: Fixed Installations Close to Machinery Part 4: Fixed Straight Ladders (GB17888.4-2020)

4.2.1 Necessity of fall protection devices

If the fall height is greater than or equal to 3000mm, the straight ladder should be equipped with fall protection device.