Visual Reminder:My friend has a tree surgery business and he uses a 100 foot boom truck to lift and drop pieces of a tree that are dangerously close to a house. He also offers it for hire for other tree surgeons and sign installers and air conditioners. He offers it for hire with his operator. There is no bucket, but the men can hook up their harness to the boom.
I am also reminded of the Mount Everest climbs where they use ladders to traverse the cwms (no vowels in that word--it means "crevasse").
Don’t use ladders horizontally.