This document provides an overview of various types of steel structures. It discusses steel frame structures, which are the most common and consist of vertical steel columns, horizontal beams, and connections that hold the members together. It also mentions steel truss structures that use interconnected triangles to distribute weight across bridges and roofs. Additionally, it covers steel arch structures that use a curved steel arch to support long spans for bridges and buildings, and steel cable structures that employ suspension systems of steel cables anchored to towers to support bridges and roofs.