Ratchet tie-down slid down from suspended load - The Piling Crew were demobing the vibro hammer, power pack and connecting hydraulic hose bundle using the 70T Crawler Crane. The vibro hammer and power pack had been relocated with no issues. The hose bundle was the last item to move before the Crew was to finish for the day. As the hoses had already been disconnected from the power pack and vibro hammer, a soft sling was tied onto the middle of the hoses then to the hook of the crane. The Crane Operator was then given instruction by the Dogman to lift the hose bundle so the Crew could untangle then lay down in a coil. Unseen by the Crew, a 3kg tie-down strop (which had been used to originally secure the hoses on the ground to stop the hoses from spilling out into the path of the crawler crane) was still on the hydraulic hoses. As the hoses were straightening out and uncoiled, the tiedown strop became free, slipped down the opposite side of hoses and fell to the ground within 1m of where the Dogman was standing. Total movement of the ratchet tie-down strop was approx. 6metres and landed directly under the load on the opposite side to where the Dogman was standing.