This part of BS7121 gives recommendations for the safe use of hydraulic gantry lifting systems (HGLS). Subjects covered include safe systems of work, management, planning, selection, erection and dismantling, inspection, testing, examination, training, operation and maintenance. NOTE1 This part of BS7121 has been developed along the lines of BS7121‑1 with significant modifications to incorporate HGLS-specific aspects. The modifications include some information contained in the US Specialized Carriers and Rigging Association (SC&RA) document, Recommended Practices for Hydraulic Jacking Systems [6]. This part of BS7121 is intended to be used in conjunction with BS7121‑2, which provides general guidance on the inspection, testing and examination of all types of cranes. NOTE2 AnnexA and AnnexB give detailed recommendations on the training of HGLS personnel. AnnexC provides background information on the BS7121 series.