The best mild steel section depends on the design, span and intended finish. Square bar, flat bar, round bar and equal angles are commonly used for decorative gates and railings, while square hollow section (SHS) and rectangular hollow section (RHS) are popular choices for stronger frames and posts.
For components where straightness and a smoother finish are important, EN3B bright steel is often a good option for railings, balusters and decorative features. For external gates and railings, the chosen steel should be protected against corrosion with galvanising, powder coating or a suitable primer and paint system.
