§ 7.344. Machines and bearings.
In all new installations, all overhead machinery for dumbwaiters shall be securely fastened to its supports. Overhead bearings, except for handpower dumbwaiters, shall be placed on the tops of the beams or structural parts to which they are secured, except that idler sheaves may be placed below the beams, provided the parts of the bearings in tension are made of steel or wrought iron. When the dumbwaiter machinery is overhead, a substantial fireproof working platform or metal grating capable of sustaining a live load of at least 50 pounds to the square foot, shall be securely fastened underneath the machine. When machines are installed in the pit they shall be accessible through a door opening at the machine level, and not through any landing door. A substantial platform shall be provided over all such machinery. In such instances, controllers shall not be located in the shaftway.
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