26 (1) Every derrick or crane shall have the safe working load plainly marked upon it.
(2) Where one safe working load only is marked on a derrick or crane, it shall be the safe working load with single purchase only and where two safe working loads are marked, the first shall be the figure with single purchase and the second shall be the figure with double purchase.
(3) Where a derrick has been certified and tested for operation in union purchase, the safe working load shall be marked with the letters S.W.L.(U). to indicate that this is the safe working load in union purchase.
(4) In each case referred to in subsections (2) and (3), the safe working load shall be the load at the lowest inclination of the boom.
(5) Where a derrick or crane is tested at an angle exceeding 15 degrees above the horizontal, the angle at which it was tested shall be marked on it and that angle shall be the lowest permissible working angle.
(6) Where derricks are certified for and marked with a safe working load for operation in union purchase, the load lifted when in union purchase shall not be in excess of that safe working load.
(7) When derricks are operated in union purchase and are not certified and marked in accordance with subsection (3),
(a) the load lifted shall not be in excess of one-half of the safe working load of the derrick with the smaller capacity;
(b) the angle formed by the cargo runners shall not exceed 120 degrees; and
(c) the attachments and fittings of the cargo runners, guys and preventers shall be suitable for the loads to which they are subjected.
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