In case of severe weather such as strong wind and dense fog above level 5, no operation is allowed.

Dangerous operations such as aerial work, welding operation, construction machinery operation and heavy object handling shall not be carried out under severe weather conditions such as strong winds and dense fog above level 5. These weather changes are likely to change the working site conditions, leading to safety accidents, resulting in casualties and property losses. All air and ground construction operations should be stopped, and workers evacuated from the construction site should be arranged as soon as possible.