The properties of steel are known and consistent, and conform to Australian standards or their equivalent. Steel-framing components are designed around those properties. Most modern systems use high tensile steel components and appropriate jointing methods, and are engineered to pass strict performance tests. Steel is used extensively in these areas because of its inherent strength. It is recommended that you consult with your local steel framing fabricators for details.
Steel expands or contracts as the temperature changes.
Whether a steel frame is mechanically jointed or welded, in a properly constructed and insulated home thermally induced movement and noise is no more likely than with other materials. Steel framing expands and contracts at rates not too dissimilar from other materials, which means it is unlikely that there will be noise or cornice cracking problems. Used in roofing applications where it is exposed to the elements it has excellent durability, so in the less exposed internal building frame it gives longer service. At drill holes and cut edges, the galvanic action of the coating protects the exposed steel edge against corrosion. Steel frames are safe because they are earthed and it is a requirement that all new housing be fitted with circuit breaking safety devices.