This SAFETOR Roof Anchor is designed for installation to structural steel buildings. The slotted holes allow for vertical adjustment to cater for the variable distance of bolt holes from the top of purlin cleats. The dimension varies with each size of purlin. The slotted holes are centered horizontally to suit the standard distance between bolts fixing abutting purlins on a cleat. This Anchor is of a heavier design to accommodate loadings that may be sustained with fall arrest on a static line system.