The W40x431 is a W-shaped structural steel section documented here with source-listed dimensions, sectional area, and unit weight. Use this page as a quick reference when reviewing framing layouts, connection details, fabrication drawings, or CAD models.
The dimensional data should be read together with the project’s governing specifications and verified against the applicable design documents. This page explains how to interpret the listed properties without replacing engineering calculations or connection design.
W Beam
refer to : AISC 16
the American Institute of Steel Construction (AISC) Specification for Structural Steel Buildings (AISC 360-16), which is the 2016 edition of the AISC Specification for Structural Steel Buildings. It provides guidelines and requirements for the design, fabrication, and erection of steel structures in the United States.
Depth : 1049 mm
Width : 411.5 mm
Web Thickness : 34 mm
Flange Thickness : 59.9 mm
Root Fillet Radius : 30 mm
Sectional Area : 819.35 cm2
Unit Weight : 643.2 kg/m
How to read the W40x431 reference
A W shape is a wide-flange steel section formed by two flanges connected by a web. The flanges primarily contribute to resistance about the strong axis, while the web connects the flanges and contributes to shear resistance and overall section behavior. Actual performance depends on the complete section geometry, material specification, loading, bracing, and connection details.
Dimensions and section properties
The source data lists the section depth, flange width, web thickness, flange thickness, and root fillet radius. The root fillet is the curved transition between the web and flange; it matters when checking fit-up, detailing, coping, and clearances near the web-to-flange junction.
The listed sectional area is useful for material quantity calculations and for engineering checks that depend on cross-sectional area. The listed unit weight supports estimating and comparison work, but it should not be treated as a substitute for a complete structural design review.
Design and drafting context
The source identifies AISC 360-16 as the governing reference context for structural steel design, fabrication, and erection requirements. Designers should also confirm the applicable material specification, limit states, stability requirements, connection requirements, and project criteria before selecting or detailing this section.
For drafting workflows, the downloadable DWG can help establish the section profile in CAD. Confirm drawing units, insertion scale, layer standards, orientation, and required fabrication clearances before incorporating the file into a project drawing. Related internal references may include the site’s W-shape terminology guide, AISC reference pages, section-property explanations, steel connection detailing guidance, and CAD/DWG workflow resources.
Practical review checklist
- Confirm that the selected W shape matches the design analysis and project requirements.
- Check flange, web, and root-fillet clearances at connections and framing intersections.
- Use the source-listed sectional area and unit weight consistently in quantity and coordination work.
- Verify CAD units and drawing scale before using the DWG in production documents.
- Have final member selection and connection details reviewed by the responsible engineer.
W40x431 FAQ
What type of section is the W40x431?
The W40x431 is a W-shaped, wide-flange structural steel section. Its geometry is described by the listed depth, width, web thickness, flange thickness, and root fillet radius.
What information is provided for the W40x431?
The reference lists the section depth, width, web thickness, flange thickness, root fillet radius, sectional area, and unit weight. It also provides a DWG download for CAD reference.
Does the W40x431 page provide a complete design specification?
No. It is a section reference, not a complete member or connection design. Final selection requires review of loads, stability, material requirements, connections, detailing conditions, and the governing project criteria.
Which design reference is identified on this page?
The source identifies the American Institute of Steel Construction Specification for Structural Steel Buildings, AISC 360-16, as its reference context. Confirm the project’s required edition and specifications before design or fabrication.
