Universal Beams (UB), Grade 300, various sizes (Specified by size designation)
Universal Beams (UB) are hot-rolled structural steel sections with an I-shaped cross-section featuring parallel flanges. Grade 300 designates a minimum yield strength of 300 MPa under AS/NZS 3679.1:2016. These sections are manufactured in Australia by InfraBuild and BlueScope through continuous casting and hot-rolling processes at approximately 1200°C. The '300PLUS' brand commonly used exceeds minimum requirements by typically 20%. UB sections range from 150UB14.0 to 610UB125 designations, where the first number indicates nominal depth in millimetres and the second indicates mass per metre.
- Primary and secondary structural beams
- Building columns and posts
- Portal frame construction
- Multi-storey steel frames
- Bridge girders and supports
- Industrial buildings and warehouses
- Mining infrastructure
- Mezzanine floors
- Cantilever structures
- Composite floor systems
Universal Beams evolved from traditional I-beams in the 1960s with the introduction of parallel flanges, improving fabrication efficiency and connection design. Australian production commenced in the 1970s with the establishment of major steel mills at Whyalla and Port Kembla. The Grade 300 designation was standardised under AS/NZS 3679.1, replacing earlier British specifications. InfraBuild's 300PLUS brand, introduced to exceed minimum requirements, has become the de facto standard in Australian construction. Recent developments include high-strength grades (Grade 400) and improved coating systems for enhanced durability.
DISCLAIMER: This specification document is generated from the CLAD Materials Atlas Database. Information is for general guidance only and does not constitute professional engineering advice. Values are typical and may vary by batch, manufacturer, and production run. Verify suitability for specific project applications independently.