OSHA Subpart M [1926.500(b)] defines anchorage as "a secure means and point of attachment for lifelines, lanyards or deceleration devices." For physics buffs, it may also be identified as the terminus of the final force vector created by the arrested impact of a falling mass. Beyond the anchorage, the dissipation of the negative acceleration must occur without quantifiable structural failure in the mechanism or material supporting the anchor.
OSHA Subpart M [1926.500(b)] defines anchorage as "a secure means and point of attachment for lifelines, lanyards or deceleration devices." For physics buffs, it may also be identified as the terminus of the final force vector created by the arrested impact of a falling mass. Beyond the anchorage, the dissipation of the negative acceleration must occur without quantifiable structural failure in the mechanism or material supporting the anchor. While a suitable anchor point, under these criteria, may be easily identified on an open steel structure, it may prove problematic on a steep-pitch, wood-framed, shingled roof or a flat, hot tar and ballast roof. Anchor selection is not for those who refuse to consider the consequences of their selections. The OSHA standard goes on to describe the criteria for anchor points used for attachment of personal fall arrest equipment (PFAS) shall be "capable of supporting at least 5,000 pounds (22.2 kN) per employee attached."