Container Car, Articulated Well, Gunderson Maxi-Stack III

History: Like its cousins, the Gunderson Maxi-Stack I and Maxi-Stack IV, the Maxi-Stack III is a multi-unit well car designed to carry two stacked intermodal shipping containers. While its base well is 48', it can accept larger containers such as 53' in the top position, making the car a versatile addition to a railroad's intermodal services. The Maxi-Stack III is a five-unit well car, like the Maxi-Stack I (five-unit 40' well car), but unlike the Maxi-Stack IV (three-unit 53' well car), giving each car a greater capacity even though the individual wells are a smaller size than the Maxi-Stack IV.

Railroad/Company: Gunderson traces its roots to 1919 when Chet Gunderson opened Wire Wheel Sales and Service Company of Portland, Oregon. His brother, Al Gunderson joined in 1923 and shortly thereafter Gunderson Brothers was born. They became a leading steel fabricator and manufactured thousands of vital ship components during World War II. They also built lifeboats and life rafts: 3,600 by 1945.

Peace-time barges began in 1949 and the first order of railcar underframes came in 1958. In 1985, The Greenbrier Companies acquired the former Gunderson Brothers operations from FMC Corporation and restored the Gunderson name to the Portland waterfront. Since that time, Gunderson has established itself as a leader in engineering and manufacturing railcars and marine barges.

As of 2018, Greenbrier's Gunderson division is one of the largest producers of intermodal railcars.