The following question was received overnight from one of our readers regarding out-of-service tower crane trolley parking.
The question is: “We're all used to see conventional saddle jib tower cranes parked with their trolleys pulled in tight to the masts and their hooks raised. However I live near a job site where a pair of Wolffkran machines are parked every night with the trolley at the far end of the jib, furthest away from the tower and their hooks fully raised. A few years ago we had another site locally with three saddle jib cranes where every night the hooks were raised but all three cranes were parked with their trolleys mid way along the jib, this was on a MOD site.”
“I can understand if the trolley position helped with weathervaning, but is there another reason for the parked trolley positions?”
“Any one care to enlighten me?”
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