Castle Steel Inc. is a Phoenix based Structural Steel Fabricator & Erector and Pre-Engineered Metal Building Erector. We are an Arizona leader in the fabrication and erection of structural steel. We specialize in buildings 3 stories and under, erecting Libraries, Medical Buildings, Auto Dealerships, Shopping Centers, Schools, Commercial Offices, Government Facilities and Industrial Buildings. We are also experienced PEMB erectors, with the ability to erect any size Metal Building project.