Singapore legislation
Regulation 120
of Workplace Safety and Health (Construction) Regulations 2007
Regulation 120
Size of holes
Subregulation 1
It shall be the duty of —
(a)
the employer of any person who carries out the work of drilling of holes to hold any cartridge of explosives in a worksite; or
(b)
the principal under whose direction any person carries out the work of drilling of holes to hold any cartridge of explosives in a worksite, to comply with paragraphs (2) and (3).
Subregulation 2
Any drilled hole in a worksite to hold any cartridge of explosives shall be of sufficient size.
Subregulation 3
Cartridges of explosives of the proper size shall be selected so that every cartridge can be easily inserted to the bottom of the drilled hole in the worksite without forcing or ramming.