The W21x73 wide flange beam is a structural steel section recognized in the AISC 360-16 Specification for Structural Steel Buildings (2016 edition). This lightweight member of the W21 series is ideal for applications where efficiency and reduced material weight are important, such as mid-rise buildings, bridges, and industrial frameworks. Despite its lighter profile, the W21x73 provides dependable load-bearing strength and stability, making it a cost-effective option for economical structural design. Engineers, architects, and fabricators rely on precise sectional data for safety in design, accuracy in fabrication, and efficiency during erection. The table below outlines the key specifications of the W21x73 beam, including depth, width, web and flange thickness, sectional area, and unit weight.
| Property | Value |
|---|---|
| Depth (h) | 538.5 mm |
| Width (b) | 210.8 mm |
| Web Thickness (tw) | 11.6 mm |
| Flange Thickness (tf) | 18.8 mm |
| Root Fillet Radius (r) | 12.7 mm |
| Sectional Area (A) | 138.71 cm² |
| Unit Weight | 108.9 kg/m |
