UNE 36-068-94 establishes requirements for weldable deformed steel bars used as reinforcement in reinforced concrete. The standard covers B 400 S and B 500 S steel grades, chemical composition, mechanical properties, weldability, bond performance, rib geometry, nominal dimensions, mass and ovality tolerances, testing procedures, supply conditions, identification marks, and conformity assessment.
It also includes tables for mechanical characteristics, mandrel diameters, rib geometry, nominal cross-sectional areas, mass tolerances, ovality tolerances, bond performance, and acceptance coefficients. An informative annex describes experimental fatigue-resistance testing for straight bars.
Application Scope: For manufacturers, testing laboratories, inspectors, engineers, contractors, and purchasers involved in the specification, production, testing, inspection, certification, and use of weldable deformed steel reinforcement bars for reinforced concrete.
