Singapore legislation
Regulation 53
of Workplace Safety and Health (Construction) Regulations 2007
Regulation 53
Chutes
It shall be the duty of the occupier of a worksite to ensure that —
(a)
any chute provided for the removal of materials in a worksite is entirely enclosed on all sides, except at openings used for the receiving or discharging of material; and
(b)
any opening of any chute (except the top opening) in the worksite is closed when not in use.