Singapore legislation
Regulation 105
of Workplace Safety and Health (Construction) Regulations 2007
Regulation 105
Man-locks
Subregulation 1
Where work is carried out in any compressed air tunnel in a worksite, a suitably constructed and equipped man-lock shall be provided for each tunnel.
Subregulation 2
The man-locks shall be sufficiently strong to withstand any air pressure, internal or external, to which the structure may be subjected whilst in use and in an emergency.
Subregulation 3
The man-lock shall be of adequate size to accommodate all persons likely to use the lock at any one time.
Subregulation 4
The man-lock shall be maintained in working order and in a clean state at all times.
Subregulation 5
Provision shall be made to enable any person inside the man-lock or working chamber to control the doors of the man-lock or working chamber in order to leave the man-lock or working chamber in the case of an emergency.
Subregulation 6
Except in the case of an emergency, no person shall operate the controls for the opening and closing of the doors of the man-lock and working chamber unless he has been authorised by the lock attendant.
Subregulation 7
A notice which can be easily read and understood by any person employed to work in the man-lock shall be affixed in each man-lock to indicate —
the precautions to be taken during his compression or decompression and after decompression; and
the maximum number of persons who may be accommodated in the man-lock.