Singapore legislation
Regulation 25
of Workplace Safety and Health (Explosive Powered Tools) Regulations 2009
Regulation 25
Discharging of tools
Subregulation 1
It shall be the duty of any person who uses a tool to ensure that the tool is not discharged unless —
he is in a safe, well-balanced position that will prevent tilting or misalignment of the tool at the time of firing; and
the tool is placed on the substance into which a projectile is to be driven in such a manner that the protective shield or device referred to in regulation 5 will effectively arrest the escape of stray projectiles and any other object or particle discharged by the firing of the tool.
Subregulation 2
It shall be the duty of any person who uses a direct acting tool that is fitted with an interchangeable or adjustable protective shield or device referred to in regulation 5 to ensure that the distance between any part of the outer edge of that shield or device and the centre of the muzzle end of the barrel is less than 50 millimetres, unless the escape of a projectile into any area outside the shield but within a radius of less than 50 millimetres from the centre of the barrel will effectively be arrested by other surrounding material.