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Subchapter 6. Elevator Safety Orders
Article 18. Design Data, Formulas, Tests on Approved Devices, and Electrical Regulations

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§3104. Factor of Safety for Driving Machines and Sheaves.

(a) Factor of Safety for Driving Machines and Sheaves.

(1) The factor of safety to be used in the design of driving machines and in the design of sheaves used with hoisting and compensating ropes shall be not less than:

(A) Eight for steel, bronze, or for other metals having an elongation of at least 14 percent in a length of 2 inches.

(B) Ten for cast iron, or for other metals having an elongation of less than 14 percent in a length of 2 inches.

(2) The load to be used in determining the factor of safety shall be the resultant of the maximum tensions in the ropes leading from the sheave or drum with the elevator at rest and with rated load in the car.

(b) Data Required for Approval.

(1) Two complete sets of assembly and detail drawings of the governor shall be submitted, and shall show the following:

(A) The construction of the governor and the dimensions of major parts for identification.

(B) The adjustment range and values of the data as marked on the governor marking plate required by Section 3036(h).

(2) The results of a test performed at the maximum tripping speeds for which the approval is to be issued. This test shall be witnessed by an authorized representative of the Division of Industrial Safety, or the division may accept reports of witnesses recognized as competent by the division.

HISTORY

1. Editorial correction of subsection (a)(1) (Register 95, No. 34).

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