Michigan Administrative Code › Department - Labor and Economic Opportunity › MIOSHA › General Industry and Construction Safety and Occupational Health Standards › Construction Safety and Health Standard › Part 14 - TUNNELS, SHAFTS, CAISSONS, AND COFFERDAMS › TUNNELS AND SHAFTS › Section R. 408.41477 - Additional requirements for hoists

Current through Vol. 24-12, July 15, 2024
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.