Lifting sling a rawng hmasa hloh tawh chu hnathawhna hmunah hmuh tur a awm fo. Rigger tam tak chuan: hman a la him em? Chhanna tawi—industry tehfung ang chuan—ni lo. Color fading hi ultraviolet (UV) degradation chhinchhiahna hmuh theih a ni a, hei hian synthetic fibers a tichak lo va, sling-in load-bearing capacity a tichhe bawk. He kaihhruaina hian sling himna atana faded color awmzia chu a zirchiang a, UV chhiatna chu discoloration chi dang atanga thliar hran dan te, ASME B30.9 leh Washington Administrative Code (WAC) regulation-a tarlan retirement criteria bikte a zirchiang a ni. Rigging supervisor leh safety professional te tan chuan faded sling awmzia hriatthiam hi catastrophic failure venna atan a pawimawh hle.