the upward view of yellow steel loop and chain hanging on the sling of a large green beam tower crane arm`s under clear blue sky

activity architecture arm background beam build building built business carry city concrete construction crain crane develop development engineering equipment flexible frame framework hang haul haulage heavy high hoist housing industrial industry job large lift load loop machine machinery metal moveable occupation place progress project relocate safty scaffolding site sky sling steel structure swing tall technology tower tranfer transport urban weighted white wind wire work yellow