Read the excerpt from The Building of Manhattan.The BOOM is usually 70 to 90 feet long and is hinged to the mast at its base, so that both move together when the derrick swings to a new direction.

Question

Revolt · Accepted Answer

What is the shape of the boom?

Central Ideas in The Building of Manhattan

Read the excerpt from The Building of Manhattan.The BOOM is usually 70 to 90 feet long and is hinged to the mast at its base, so that both move together when the derrick swings to a new direction.

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