Whoopie Slings, 1/2 in

Whoopie slings are adjustable synthetic slings that let you set a rigging block or lowering anchor at the right height and tension without tying knots. This 1/2 in version is a common size for residential removal and pruning rigging.

Why arborists use whoopie slings

A whoopie sling is a spliced 12-strand sling with a long buried tail, so the adjustable eye can grow or shrink to fit the stem. Choke it around the spar, snug it down, and hang your block exactly where you want it. After the load comes off, it slides back open, which saves a lot of time over picking out a tight knot.

Because the high-modulus fiber stretches very little, the anchor stays where you set it. That also means it is not a shock absorber, so plan cuts and rigging forces carefully.

Sizing and safe use

Choose a length that wraps the stems you usually rig on with room to choke, and always use the sling within the working load limit the manufacturer specifies. Avoid sharp edges, keep it away from the saw, and inspect the splices and the adjustable section for pulled strands, melting, or abrasion before each use.

Pair it with a rigging block or other adjustable slings rated for the loads you will be catching. Rigging should be planned by trained workers following ANSI Z133.

Carry two or three lengths in the rigging bag. A short sling covers small spars and limbs, and a longer one reaches around big leaders or a pair of stems when you need a wider anchor.