Australia Model Code of Practice: Managing the Risk of Falls at Workplaces 6.1: 6.1 Restraint technique: set so the wearer cannot reach an unprotected edge

A restraint technique uses a harness connected by lanyard to an anchorage or horizontal lifeline so the wearer physically cannot reach a position where they could fall, and it must be set up that way. It suits only work where the user keeps secure footing without tensioning the line or needing another handhold, judged on slope, surface material and whether it is wet, oily or slippery. It must be used only where ground or solid construction work or a fall prevention device such as a guardrail is not reasonably practicable. It should be installed by a competent person to the manufacturer's instructions, with anchorages designed for fall arrest loads; purpose-designed roof anchors may be used on metal deck or tiled roofs. Where restraint is not reasonably practicable, the PCBU must provide a fall arrest system so far as is reasonably practicable; restraint is unsuitable where the user can reach a fall position, can lengthen the line to a free fall position, could fall through the surface (fragile roofing), the slope exceeds 15 degrees, or other likely use or misuse could lead to free fall.