§ 7.228. Top clearances.
(a) A top clearance shall be provided of at least 11 feet above the top terminal landing. Such clearance shall be maintained from a plane through each face of the belt to a vertical cylindrical plane having a diameter of 2 feet greater than the diameter of the floor opening, and extending upward from the top floor to the ceiling on the up-running side of the belt. No encroachment of structural or machine-supporting members within such space is permitted.
(b) There shall be a clearance of at least 5 feet between the center of the head pulley shaft and any ceiling obstruction. The center of the head-pulley shaft shall be not less than six feet above the top terminal landing.
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