E - Fixed Constructions – 04 – D
Patent
E - Fixed Constructions
04
D
E04D 15/00 (2006.01) A62B 1/04 (2006.01) B62B 1/00 (2006.01) E04G 21/32 (2006.01)
Patent
CA 2336426
An attachment assembly provides a secure attachment point for the fall arrest tether lines of safety harnesses of workers on flat roofs, the assembly being movable over the roof as required. The assembly can be used alone, but usually is mounted on a wheeled utility cart as employed by roofers to move materials on the roof, or may be an integral part of such a cart. The assembly has a base frame that is spaced from the roof edge over which the worker may fall. An attachment member for tether lines is mounted on the base frame together with at least two longitudinally spaced surface engaging arm, the arms being located at the frame side nearer to the roof edge. When the assembly is in operative position each arm has its lower end, which usually has teeth, close to the roof surface. A counterweight is mounted on the opposite side of the base frame. Upon a fall from the roof the tether line pulls on the attachment member downward and toward the edge, the pull tilting the base and cart frames to engage the teeth with the roof surface, whereupon the ends become pivots about which the frames can pivot against the counterweight, which ensures only minor tilting and/or dragging of the assembly toward the edge. With e.g. concrete roofs the teeth may be replaced by bolts in the surface against which the arm ends butt for the assembly to pivot.
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