255. Safe handling of loads: The handling of loads on a work site shall take place in accordance with the following standards:(1) before hoisting a load, the operator or the signalman shall ensure that all the cables, chains, slings or other moorings are properly attached to the load and that hoisting does not present any hazard;
(2) the hoisting of loads shall be done vertically;
(3) when oblique hoisting is absolutely necessary, precautions dictated by the circumstances shall be taken, and this operation shall be performed in the presence of a competent person representing the employer;
(4) if the uncontrolled movement or the swinging of a raised load involves a danger, one or more guide ropes shall be used;
(5) the hoisting device shall not be left unsupervised when a load is suspended therefrom;
(6) the moving of loads above people shall be avoided and, if this is not possible, then specific measures shall be taken to ensure the safety of these persons;
(7) it is prohibited for any person to stand on a load, a hook or a sling suspended from a hoisting device;
(8) the hooks used to hoist loads as well as those attached to slings shall be equipped with a safety catch except where these hooks are specifically designed for the safe hoisting of certain loads.