Abstract: A structural beam for use in the construction industry is described. The structural beam is comprised of a hollow top section and a hollow bottom section which are connected by one or two webs that may be corrugated. The hollow top and bottom sections may be rectangular. A corrugated web is also described having a trapezoidal shape. Also described is the combination of utilizing rectangular horizontal sections with a corrugated web to produce a structural beam that is light in weight, yet strong and fatigue resistant. Also described is a method of producing a structural beam having a corrugated web, a hollow top section, and a hollow bottom section.