The W8x31 is a W-shaped structural steel section listed with dimensional and mass information for reference, drafting, and engineering review. This page preserves the local source data and provides context for interpreting the section designation, profile dimensions, and downloadable CAD resource.
Use the listed values with the applicable AISC specification, project drawings, material requirements, and engineering calculations. A section reference page supports design communication, but it does not replace verification of strength, stability, serviceability, connections, or fabrication requirements.
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 : 203.2 mm
Width : 203.2 mm
Web Thickness : 7.2 mm
Flange Thickness : 11 mm
Root Fillet Radius : 10 mm
Sectional Area : 58.9 cm2
Unit Weight : 46.2 kg/m
How to read the W8x31 reference
The source content identifies this member as a W beam and reports its overall depth, flange width, web thickness, flange thickness, root fillet radius, sectional area, and unit weight. These properties describe the rolled cross-section and help engineers and detailers coordinate the member with framing layouts, connection details, and material takeoffs.
For a broader comparison, review related W-shape dimensions and steel section properties. Comparing neighboring shapes can help organize a preliminary framing study, but the final selection must account for the governing loads, unbraced length, local conditions, connection design, applicable materials, and project specifications.
Dimensions and detailing considerations
Flange and web dimensions are useful when checking clearances, copes, stiffeners, bearing conditions, and connection geometry. The root fillet is also relevant when detailing plates or fittings near the web-to-flange transition. Fabrication drawings should use the controlling project requirements and the actual approved material information rather than relying on a nominal profile description alone.
AISC reference and CAD download
The page identifies AISC 360-16 as the governing specification reference in the preserved source content. Consult the applicable AISC requirements and project documents for design, fabrication, and erection decisions. The linked DWG file can support drafting and layout work; confirm scale, units, layers, and project-specific detailing conventions before incorporating it into issued drawings.
For related guidance, see resources covering steel connections, structural steel terminology, and CAD/DWG detailing.
W8x31 frequently asked questions
What does W8x31 identify?
W8x31 identifies a W-shaped structural steel member using the designation shown in the source content. The designation should be used together with the dimensional and unit-weight information listed on this page.
What information is provided for this section?
The reference lists the section’s depth, width, web thickness, flange thickness, root fillet radius, sectional area, and unit weight. These values are intended for reference and coordination with the applicable design documents.
Can the W8x31 DWG be used directly for fabrication?
The downloadable DWG is a drafting resource, not a substitute for approved fabrication drawings. Check units, scale, revision status, material requirements, connection details, and project standards before use.
Does this page replace structural design verification?
No. The listed section data must be evaluated against the governing loads, limit states, stability requirements, connection behavior, serviceability criteria, and project specifications by the responsible design professional.
