This standard specifies the rated load, rated speed, and turning radius of club-type overhead cranes, special overhead cranes, bridge cranes (including unloaders), and jib-equipped cranes (including unloaders). It is recommended that the values specified in this standard apply mutatis mutandis to cranes not specified in this standard.
JIS B 8820:2004 history
2004JIS B 8820:2004 Rated capacity, rated speeds and slewing radius of cranes
1995JIS B 8820:1995 Safe working loads, rated speeds and slewing radii of cranes