Using a derrick to raise marble for a building on Trinity Place, 1906

Men called riggers erected the derricks to raise both stone and steel using the same principles as a mast on a sailing ship; a stationery pole stabilized with guy wires (as a mast on a sailing ship might be stabilized) had a moveable boom allowing workers to raise heavy materials using ropes or wire cable and pulleys.

See this image in the exhibit Landscape of Lost Arts.