Requirements for pulley blocks to lift up to 6 tons in combination with natural and synthetic fibre ropes of maximum safe working load up to 10 kN on the single part, rope safety factor 8, maximum rope velocity 0.5 m/s, and a sheave diameter at the bottom of the groove not less than five rope diameters. Materials and heat treatment, block shell , head fitting, becket, axle pins, sheaves, lubrication, locking nuts, finish. Recommendations for contracts and marking of safe working load per rope fall.

? British Standards Institution 2013

Amendment notes:
AMD 2160 published 30 November 1976
AMD 333 published 02 October 1969
AMD 427 published 16 February 1970

BS 1839:1952

BS EN 13157:2004+A1:2009