Mich. Admin. Code R. 408.41477

Current through Vol. 24-21, December 1, 2024

Section R. 408.41477 - Additional requirements for hoists

Rule 1477.

(1) A hoist used for raising or lowering materials in a shaft shall have a minimum factor of safety of 5, shall be designed and rated by a qualified engineer, and shall be constructed in accordance with the design. The design shall be constructed so that the hoist cannot exceed the maximum rated speed.

(2) The rated capacity of the hoist shall be posted at all working levels.

(3) To ensure suitable operation and safe condition of all functions and safety devices, each hoist assembly shall be inspected and load-tested to 100% of its rated capacity at the time of installation; after any repairs or alterations affecting its structural integrity; after the operation of any safety device; and annually when in use. The employer shall prepare a certification record which includes the date each inspection and load-test was performed; the signature of the person who performed the inspection and test; and a serial number or other identifier for the hoist that was inspected and tested. The most recent certification record shall be maintained on file until completion of the project.

(4) A competent person designated by the employer shall visually inspect the stationary hoist assembly, anchorages, and hoisting rope at the beginning of each shift.

(5) All unsafe conditions that are revealed by tests, checks, or inspections shall be corrected before use of the equipment.

(6) Hoist equipment and the operator shall be protected from inclement weather by a hoist house with a comfortable temperature maintained.

(7) Where glass is used in hoist house windows, the glass shall be safety glass or its equivalent.

(8) Hoist controls shall be arranged so that the operator can perform all operating cycle functions and reach the emergency power cutoff without having to reach beyond the operators normal operating position.

(9) Controls for powered hoists shall be of the deadman-type with a non-locking switch or control.

(10) All hoists shall be equipped with landing level indicators at the operators station. Marking the hoist rope does not satisfy this requirement.

(11) Material hoisting may be performed at speeds higher than the rated speed for personnel hoisting if the hoist and components have been designed for such higher speeds and if shaft conditions permit.

(12) Personnel and materials (other than small tools and supplies secured in a manner that will not create a hazard to employees) shall not be hoisted together in the same conveyance. However, if the operator is protected from the shifting of materials, then the operator may ride with materials in cages or skips which are designed to be controlled by an operator within the cage or skip.

(13) Line speed shall not exceed the design limitations of the systems.

(14) A fire extinguisher that is rated at least 2A:10B:C, multi-purpose, dry chemical, shall be mounted in each hoist house.

(15) Hoists shall be equipped with limit switches to prevent overtravel at the top and bottom of the hoistway.

(16) Hoist operators shall be provided with a closed-circuit voice communication system to each landing station, with speaker microphones located so that the operator can communicate with individual landing stations during hoist use.

(17) When sinking shafts 75 feet (22.86 m) or less in depth, cages, skips, and buckets that may swing, bump, or snag against shaft sides or other structural protrusions shall be guided by fenders, rails, ropes, or a combination of those means.

(18) When sinking shafts more than 75 feet (22.86 m) in depth, all cages, skips, and buckets shall be rope or rail guided to within a rail length from the sinking operation.

(19) Cages, skips, and buckets in all completed shafts, or in all shafts being used as completed shafts, shall be rope or rail-guided for the full length of their travel.

(20) Wire rope used in load lines of material hoists shall be capable of supporting, without failure, at least 5 times the maximum intended load or the factor recommended by the rope manufacturer, whichever is greater. Refer to Construction Safety and Health Standard Part 10. "Cranes and Derricks," as referenced in R 408.41410, for design factors for wire rope used in personnel hoists. The design factor shall be calculated by dividing the breaking strength of wire rope, as reported in the manufacturer's rating tables, by the total static load, including the weight of the wire rope in the shaft when fully extended.

Mich. Admin. Code R. 408.41477

1979 AC; 2003 AACS; 2013 AACS; 2014 AACS; 2021 MR 4, Eff. 3/2/2021