This Code covers the welding requirements for any type of welded structure made from thecommonlyused carbon and low alloy constructional steels. Sections 1 through 7 and 11 constitute a body of rules for the regulation of welding in steel construction. Sections 8,9, and 10 contain additional rules applicable to specific types of structures, i.e., statically loaded structures, dynamically loaded structures, and tubular structures, respectively, and supplement the first seven sections. There are eleven mandatory and ten non-mandatory appendixes in this Code. A Commentary of the Code is included with the document.