Roundsling construction

A roundsling which comprises at least two parallel lifting cores of endless loops of strands of load bearing material, each core separated from the other by endless loop tubular cover means, each said core containing a strand of fiber optic material having two free ends, said cover enveloping all of said core strands, said cover having at least one aperture for each said lifting core from which said free ends of fiber optic (strand extend.) material emerge from said core and extend for a distance of one inch or more.

A method of constructing a roundsling which comprises first, forming an endless loop of strands of load bearing material to form a lifting core;

• second, forming loops of at least one strand of fiber optic material having two free ends inside said lifting core, aligning all loops of said strands of material in parallel relation to each other, placing said strands of lifting core loops and fiber optic loops in parallel relationship on a surface having guide means mounted on said surface, fastening said loops at their distal ends to a holding means, separating said two free distal ends of said fiber optic strand from said holding means, pulling a tubular cover means having two ends over one end of said guide means to envelop said endless loops, (fastening the distal ends of said parallel load bearing endless loops,) separating the two free distal ends of said fiber optic strand, fastening the distal ends of said tubular cover means to form an endless loop, cutting an aperture in said cover means, and applying pulling means to said two distal free ends of said fiber optic strand to draw said free ends out through said aperture in said cover means for a distance of one inch or more.