The maximum gross mass for 20 ft. dry cargo containers are 52,911 lbs., and 40 ft. (incl. 9 ft 5in. high cube containers) are 67,197 lbs. Depending upon the construction of these connex containers, standard freight containers have a tare mass of 3,968 - 5,291 lb for 20 ft. containers and 6,172 - 8,818 lb for 40 ft. shipping containers. The maximum payload mass is there reduced to approx. 47,619 lb for a 20 ft. and for 58,422 lb for 40 ft. strong tight containers.