34 Pa. Code § 7.374

Current through Register Vol. 54, No. 50, December 14, 2024

Section 7.374 - Ropes

(a) The minimum number of hoisting ropes used shall be three for traction hoists and two for drum-type hoists.

(b) The minimum diameter of hoisting and counterweight wire ropes shall be 1/2-inch.

(c) Minimum factors of safety for suspension shall conform with the following

WIRE ROPES

Rope speedin feet per minute:	Minimum factor of safety
50	7.60
75	7.75
100	7.95
125	8.10
150	8.25
175	8.40
200	8.60
225	8.75
250	8.90
300	9.20
350	9.50
400	9.75
450	10.00
500	10.25
550	10.45
600	10.70

34 Pa. Code § 7.374