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W18x50 Steel Beam Dimensions, Weight & Properties

The W18x50 wide flange beam is a standard steel section defined in the AISC 360-16 Specification for Structural Steel Buildings (2016 edition). With a depth of 457.2 mm and flange width of 190.5 mm, this beam offers excellent strength-to-weight performance for structural applications. It features a 9 mm web thickness and 14.5 mm flange thickness, making it ideal for medium-load construction such as building frames, bridges, and general structural design. The W18x50 steel beam provides a balance of structural capacity and economy, making it a common choice among engineers. Below is a detailed table of its key sectional properties.

PropertyValue
Depth (h)457.2 mm
Width (b)190.5 mm
Web Thickness (tw)9 mm
Flange Thickness (tf)14.5 mm
Root Fillet Radius (r)10.2 mm
Sectional Area (A)94.84 cm²
Unit Weight74.4 kg/m