Anchorage connectors install on structurally sound components (such as a beam, wall, or roof) to create a secure tie-off point between the anchor and the lanyard on a personal fall prevention system. Concrete anchors install on concrete floors and walls. Roof anchors install on roofs to keep workers safe near edges and on slopes. Steel and beam anchors are clamped, welded, or bolted to structural steel (such as beams and pipe). Strap and cable anchors have a loop or ring around each end to wrap around structural components when the component is exposed on all sides. Door and window jamb anchors don't damage finished walls and door frames. Freestanding anchors install where overhead anchor points are not possible. Telescoping post anchors have an adjustable-height mast to support workers over edges. Fixed-height post anchors install on flat and sloped structures. Vacuum anchors are used when surfaces cannot be penetrated to install a anchor, such as when working on aircraft.