Winthrop Building Systems (WBS) is a manufacturer of pre-engineered steel buildings. WBS offers the ultimate in general purpose and pre-engineered structures based on mild-steel frames. Because of their faster construction, strength, versatility, and reduced costs, steel buildings offer an attractive alternative to traditional wood and concrete masonry buildings. Winthrop Building Systems is committed to supplying exceptional quality products and services in the prefabricated construction industry by developing and employing the most advanced information, engineering, manufacturing, and delivery systems available. Our steel buildings can withstand insects, fire, earthquakes, and storms. They are built to last a lifetime. We use only the strongest steel and the finest finishing materials. We can fabricate any width, length or height building your project calls for, and we will deliver it to you anywhere in the country