34 Pa. Code § 405.34 - Projections and recesses
Projections or recesses for landing entrances, junction boxes and conduits for wiring, seating cart storage areas, orchestra areas and piano storage areas shall have the following protection:
(1) Metal bevel plates shall protect the
underside and topside of projections and the underside of all recesses. The
plates shall extend from the edge of the projection or recess to the wall. The
beveled angle may not be less than 75° relative to a horizontal position.
Instead of plates, the bevel surfaces may be made of concrete and troweled to a
smooth finish. Pressure sensing strips meeting the requirements in paragraph
(2) may be used instead of beveled plates.
(2) Pressure sensing strips shall be placed
on the underside of the platform on sides where there is a projection or
recessed opening and on an apron attached to the platform. Pressure sensing
strips shall meet the following requirements:
(i) A strip shall be interconnected to the
operating and controlling circuit of the elevator.
(ii) A strip shall detect an obstruction that
exerts a force of 5 pounds or greater per square inch.
(iii) The elevator shall immediately stop and
automatically reverse direction for travel of 2-4 inches when a strip detects
an obstruction. The pressure strips may automatically reset once the elevator
has stopped its reverse travel.
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