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W40x277 Steel Beam Dimensions, Weight & Properties

The W40x277 wide flange beam is a structural steel section defined in the AISC 360-16 Specification for Structural Steel Buildings (2016 edition). It is commonly used in heavy construction projects such as bridges, tall buildings, and industrial frameworks where strength, efficiency, and reliability are essential. With its wide flange profile, the W40x277 ensures excellent load distribution and stability, making it an ideal choice for structural design and fabrication. Engineers and construction professionals rely on these detailed specifications for accurate planning, design, and erection. The table below provides key properties, including depth, width, web and flange thickness, sectional area, and unit weight.

PropertyValue
Depth (h)1008.4 mm
Width (b)401.3 mm
Web Thickness (tw)21.1 mm
Flange Thickness (tf)40.1 mm
Root Fillet Radius (r)30.0 mm
Sectional Area (A)525.81 cm²
Unit Weight412.8 kg/m
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