Load rating certificate for hoisting conveyances

(1) Each conveyance shall have a certificate showing the rated load certified by the manufacturer or a professional engineer; the serial number; date of manufacture; and name of the manufacturer. 141 (2) The maximum design stress for each component of a conveyance shall be established by a professional engineer and shall include the effects of the weight of the conveyance; the rated load; any impact load; any dynamic load; stress concentration factors; corrosion; metal fatigue; and dissimilar Professional engineers design. Safety factor. Securing equipment from (3) All parts of a shaft conveyance when carrying the rated load shall be capable of withstanding four times the maximum allowable design stress, without permanent distortion. Slinging equipment from (4) Whenever equipment or supplies are being transported in a shaft conveyance, they shall be loaded and secured to prevent them from shifting. Cage for (5) Where equipment to be transported in a shaft is slung underneath a conveyance or crosshead, it shall be suspended in such a manner as to prevent its contact with any part of the shaft interior or its furnishings. (6) Except during sinking operations, a suitable shaft conveyance or cage shall be provided for the transport of (7) A cage for the transport of persons in a shaft shall be enclosed on all sides, (except for the side containing a door), by steel sheet at least 3 mm (1/8 ins) thick or material of equivalent strength, and Cage (a) shall be adequately ventilated; (b) shall have a hood made of plate steel at least 5mm (0.2 ins) thick or material of equivalent strength and incorporating an escape hatch; (c) shall have an internal height greater than 2.1 meters (7 feet); 142 (d) shall have a door opening clearance greater than 1.8 meters (4.5 feet), and if supported by a single rope, shall be equipped with safety catches and mechanism. Cage doors. (8) The doors of a cage shall– (a) be at least 1.5 meters (5 feet) high; (b) be mounted and arranged so they cannot be opened outward from the cage; (c) have the minimum clearance at the floor to allow them to be opened and closed; (d) be of solid construction and adequate strength to withstand normal shock loads. Cage safety catches. (9) The safety catches on a cage or skip shall safely stop and hold them if the hoisting rope or its attachment should fail and shall be tested by a free fall test before the cage or skip is first used for the transport of persons and also after any repairs to the safety catches or mechanisms. Free fall testing. (10) The free fall test shall be conducted with the cage or skip carrying a weight equal to the maximum permitted load and at a speed equal to the normal hoisting speed when transporting Passing standard for free fall tests. (11) A free fall test shall be considered successful if– (a) the cage or skip is decelerated between 1g and 3g; (b) there is no damage to the safety dogs or mechanisms; and 143 (c) the dogs engage the guides continuously during deceleration and the calculations show that the safety dogs would stop the cage or skip carrying its maximum permitted load. Report to (12) The results of free fall tests shall be submitted to the Chairs for landing cages. (13) Chairs used for landing a cage shall be arranged to fall clear of the shaft compartment when the cage is lifted off the chairs.