Schedule. (2), The Docks Regulation (Safety of Wharf Workers) Rules

MANNER OF TEST AND EXAMINATION BEFORE TAKING LIFTING MACHINERY AND GEAR INTO UsE. Rules 22 (1), 23 (1) and 24 (1) (a). (1) Every winch with the whole of the gear accessory thereto (including derrick, goose necks, eye-plates, eye-bolts or other attachments) shall be tested with a proof load which shall exceed the safe working load as follows- Safe working load. Up to 20 tons. 20--50 tons. Over 50 tons. Proof load. 25 per cent. in excess. 5 tons in excess. 10 per cent. in excess. The proof load shall be applied either- (i) by hoisting movable weights; or (ii) by means of a spring or hydraulic balance or similar appliance, with the derrick at an angle to the horizontal which shall be stated in the certificate of the test. In the former case, after the movable weights have been hoisted, the derrick shall be swung as far as possible in both directions. In the latter case, the proof load shall be applied with the derrick swung as far as practicable first in one direction and then in the other. (2) Every crane and other hoisting machine with its accessory gear shall be tested with a proof load which shall exceed the safe working load as follows- Safe working load. Up to 20 tons. 20--50 tons. Over 50 tons. Proof load. 25 per cent. in excess. 5 tons in excess. 10 per cent. in excess. The said proof load shall be hoisted and swung as far as possible in ?oth directions. In the case of a jib-crane if the jib has a variable radius It shall be tested with a proof load as defined above at the maximum and minimum radii of the jib. In the case of hydraulic cranes or hoists, where, owing to the limitation of pressure, it is impossible to hoist a load 25 per cent. in excess of the safe working load, it shall be sufficient to hoist the greatest possible load. (3) Every article of loose gear (whether it is accessory to a machine or not) shall be tested with a proof load at least equal to that shown against the article in the following table- 1842 Cap. 217] Docks Regulation Article of Gear. Proof load. Chain }Ring ... ~;:c~le :.:.:. Twice the safe working load. Swivel ... Pulley Blocks: Single Sheave Block . . . Four times the safe working load. Multiple Sheave Block with} safe working load up to and Twice the safe working load. including 20 tons . . . .. . Multiple Sheave Block with} safe working load over 20 20 tons in excess of the safe tons up to and including working load. 40 tons ... ... . .. Multiple Sheave Block with} safe working load over One and a half times the safe 40 tons .. . . . . . . . working load. Provided that where the Chief Mechanical Engineer, Railway Department, is of opinion that, owing to the size, design, construction, material or use of any such loose gear or class of such gear, any of the above requirements are not necessary for the protection of persons employed, he may by certificate in writing (which he may in his discretion revoke) exempt such gear or class of gear from such requirement, subject to such conditions as may be stated in the certificate. (4) After being tested as aforesaid, all machines with the whole of the gear accessory thereto and all loose gear shall be examined, the sheaves and the pins of the pulley blocks being removed for the purpose, to see that no part is injured or permanently deformed by the test. (5) In the case of wire ropes, a sample shall be tested to destruction and the safe working load shall not exceed one-fifth of the breaking load of the sample tested.