We are a Longview, Texas based contractor with a proven track record and over 25 years experience in the steel erection indus ... try. We are licensed in Louisiana and work in Oklahoma as well as Texas. Deem Structural Services is proud to be an American Institute of Steel Construction Advanced Certified Steel Erector. We bring all this and more to our customer base as a respected and experienced partner to build a professional relationship. A partnership that each can rely on to benefit the other. read more