1412.10   USE OF DERRICKS AND HOISTING APPARATUS.
   No person shall erect and use any derrick or hoisting apparatus exceeding fifty feet in height on any street or sidewalk in the City, for the purpose of erecting, changing or repairing any building or structure, without first obtaining a special permit therefor. Such permit shall be issued under such conditions as may be required by the Building Commissioner.
(1956 Code Sec. 16.4)