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 › GENERAL PROVISIONS › Section 7.56 - Cables

Current through Register Vol. 54, No. 28, July 13, 2024
(a) At least three
					 hoisting cables shall be used on all traction-type passenger elevators not
					 already in use.
(b) Hoisting and
					 counterweight cables shall be composed of iron or steel of high quality. The
					 minimum diameter for any cable shall be 1/2 inch. When different diameters of
					 cables from those given in subsection (c) are necessary, the strength of such
					 cables shall be computed in the same ratio as shown in that subsection. When
					 the material of existing hoisting and counterweight cables is unknown such
					 cables shall be assumed to be of iron and the lifting capacity of the
					 installation rated accordingly.
(c)
					 No hoist or counterweight cable shall be stressed beyond a factor of safety as
					 follows:
Cable Speed(in feet per minute)
Factor of Safety
50
7.60
100
7.95
150
8.25
200
8.60
250
8.90
300
9.20
350
9.50
400
9.75
450
10.00
500
10.25
600
10.70
700
11.00
800
11.25
900
11.45
1000
11.55
1200
11.80
1400
11.90
1500
11.90
(d) Only approved types of cable fastenings
					 shall be used.
(e) Where cables
					 pass through the floors on the outside of shaftway enclosures, solid enclosures
					 or standard metal guards shall be provided to a height of at least six
					 feet.
(f) In new installations, the
					 diameters of drums and sheaves shall be at least 40 times the diameter of the
					 cables used. In existing installations, the drums and sheave diameters may be
					 accepted if changes are not considered necessary by the Department.
(g) There shall be at least two wraps of the
					 hoisting and counterweight cables on the drums of passenger elevators of the
					 winding drum type when ei ther the car or counterweights are at the limits of
					 travel. The ends of the cables shall be clamped on the inside of the
					 drum.
(h) Cables shall be provided
					 with a means for equalizing. Drum-type elevators shall be provided with
					 eveners. On existing installations the requirement for cable equalizers need
					 not be complied with until the next cable renewal. Such equalizers shall be
					 fastened in position with a nut, locknut, and cotter pin. Coil or helical
					 springs, when used, shall be of a design which does not permit full compression
					 under normal load. The ropes of the car and drum counterweights of power-driven
					 elevators having drum type driving machines shall be reshackled every 2 years,
					 except when auxiliary rope fastening devices are installed. Reshackling is
					 required when the auxiliary rope fastener indicates failure of any rope
					 fastening. Crosby clips and heart shackles shall be included, two to one roped
					 under slung drum elevators are exempted. A metal tag shall be placed on the
					 rope to show the reshackling date and the person who performed the
					 work.
(i) A metal data tag shall be
					 securely attached to one of the wire rope fastenings. A new tag shall be
					 installed at each rope renewal. A data tag shall bear the following data:
(1) The diameter in inches.
(2) The breaking strength, as rated by the
					 manufacturer.
(3) The grade of
					 material used.
(4) The month and
					 year the ropes were installed.
(5)
					 Whether nonperformed or performed.
(6) The construction
					 classification.
(7) The name of the
					 person or firm who installed ropes.
(8) The name of the manufacturer of the
					 rope.