Patent ID: 7854577

Claim:
A freight container, comprising: a floor; a roof; a first end wall extending from the floor to the roof; a second end wall extending from the floor to the roof opposite the first end wall; and mutually opposed first and second sidewalls extending from the floor to the roof and from the first end wall to the second end wall, the first and second sidewalls being made of high-strength steel having a yield strength of at least about 87,000 pounds per square inch, the sidewalls having a thickness up to one inch and defining an internal span therebetween of at least one hundred inches; wherein the first and second sidewalls each comprises a corrugated panel having alternating flat, mutually parallel first and second corrugation spans respectively of substantially one hundred millimeters and one hundred and three millimeters, the spans being staggered by steeply angled intermediate connecting webs, each of the webs having a height of substantially seventeen millimeters and a span of substantially five millimeters.