FACTORIES AND INDUSTRIAL UNDERTAKINGS (LIFTING APPLIANCES AND LIFTING GEAR) REGULATIONS
Restriction on the use of cranes
(1) Without prejudice to paragraph (2), the owner of a crane shall ensure that the crane's hoisting mechanism is not used for any purpose other than raising or lowering a load vertically unless-
(a) he has taken all reasonable steps to see that no undue stress is imposed on any part of the structure or mechanism of the crane thereby endangering the stability of the crane; and (71 of 1989 s. 13)
(b) such use is supervised by a competent person.
(2) The owner of a crane which has a derricking jib shall ensure that it is not used with the jib extended at a radius which exceeds the maximum radius specified for the jib in the current certificate of test and thorough examination relating to that crane.