Connects horizontally to wide range of I and H beam flanges from 3" to 24" wide and up to 2 1/2" thick. Once attached, units (models 8814 and 8816) slide along beam with worker to provide increased safety, mobility and productivity. Fixed unit (model 8815) designed to be tightened horizontally or vertically, firmly gripping beam or column to provide temporary or permanent anchorage attachment. Integral positive-lock engagement system eliminates need for loose connection pins which can be installed incorrectly or inadvertently disengaged. Lanyards are designed for 12' fall, to be used with beam anchors. Meets all applicable OSHA and ANSI regulations.