The QTY of decking for 20ft container Share Issue Time Mar 26,2015 For 20ft container, the G.W is below 22tons.Hollow decking with joist: 2.2m/pc, 800~1000sqm2.9m/pc, 500~700sqmSolid decking with joist:2.2m/pc, 500~700sqm2.9m/pc, 500~700sqm