Today’s construction technology largely focuses on low cost and better reliability. For building additions, steel is also a lightweight construction solution that reduces loads on the foundations and lowers sub-structure costs. Steel is primarily used in multi-story residential structures, especially mixed-use structures where the lower levels are used for commercial purposes or, in certain circumstances, basement parking. Steel building frames make it easier to establish the compatibility of floor grids between the commercial, parking, and residential floors of mixed-use buildings, which is a crucial design consideration. Bluescope steel framing uses a range of steel building technologies, including structural steel frames, infill walling, floor decking, lightweight façade and roofing systems, and modular steel construction.