Pennsylvania Code
Title 34 - LABOR AND INDUSTRY
Part I - Department of Labor and Industry
Chapter 7 - ELEVATORS, LIFTS, ESCALATORS, DUMBWAITERS, HOISTS ANDTRAMWAYS
Subchapter B - PASSENGER ELEVATORS
SPECIAL REQUIREMENTS
Section 7.75 - Double-button control passenger elevators

(a) Double-button control passenger elevators shall not be constructed and installed unless a special permit is first obtained from the Department. Their use is at all times subject to regulations applied to them by the Department for the protection of the public and employes.

(b) Such elevators are subject to the same requirements as electric passenger elevators, except as to door interlocks, emergency releases, emergency switches, operators, and speed.

(c) The landing doors of double-button control passenger elevators shall be equipped with approved interlocking switches so arranged that the elevator car is immovable while any landing door is open, and so that such door or doors may not be opened unless the car is at that landing.

(d) The cars of such elevators shall not have openings on more than two sides. Sliding or rolling doors or collapsible gates are required at all car openings. Such gates shall be equipped with switches so connected to the car control circuit as to hold the car immovable while the gates are open.

(e) The wires to the safety switch shall be run in a special cable. Means shall be provided to prevent any interference from the hall buttons or switches when the elevator is being operated from within the car, such means to be automatic, or provision shall be made to enable the person operating the elevator from within the car to prevent interference from the landing buttons or switches, and to maintain complete control of the car.

(f) In addition to the directional buttons in the car of a double-button control elevator, a safety switch shall be provided in the car to enable the person operating the elevator from within the car to stop the car at any point of its travel. Such switch shall be manually operated.

(g) Double-button control passenger elevators are limited to a speed not exceeding 100 feet per minute.

(h) Pushbuttons shall not be permitted to control the operation of elevators in school buildings, sanitariums for the mentally deficients, and similar classes of buildings where there is danger of the abuse of the purpose of such bottons, unless the pushbuttons may be made inaccessible to the occupants or are key operated. A decision on this point shall be made at the time of the approval of the plans for such elevators.

(i) Automatic operation elevators shall be provided with an audible emergency signal gong, at least four inches in diameter, operative from the car and located outside of the hoistway, or shall be provided with a telephone connected to a central exchange.