Two-Blocking Damage Prevention
25 March 2014
We have noticed a dangerous situation occurring amongst folding boom crane owners and operators. Folding booms equipped with winches require a device to prevent two blocking.
Wording of OHS regulations references that the requirement for anti-two block devices was repealed in 2006. This change only applies to the wording.
BC OHS regulations require articulating (folding) boom cranes to adhere to ANSI / ASME B30.22-2005 which states that folding boom cranes equipped with a winch must be equipped with a feature to prevent damage from two-blocking.
This hazard alert from WorkSafe BC June 2012 describes the dangers to workers and equipment from two blocking: Hazard Alert: Worker struck by load after articulating boom crane "two-blocks"
British Columbia Crane Safety – Provides content on certifications, learning resources, links to pdfs of application forms, practice tests, etc.
WorkSafeBC - Dedicated to promoting workplace health and safety for the workers and employers of the province of British Columbia, WorkSafeBC consults with and educates employers and workers and monitors compliance with the Occupational Health and Safety Regulation.
Industry Training Authority of British Columbia (ITA BC) - The Industry Training Authority is the provincial crown agency responsible for overseeing B.C.'s industry training and apprenticeship system. itabc.ca provides a comprehensive resource about industry training programs in British Columbia and is a useful source of information for current apprentices and their employers, as well as for those considering apprenticeship for their career or workforce development needs.
ITA Apprenticeship & Red Seal Program Listings