The W16x31 is a W-shaped structural steel beam profile listed with metric dimensions and unit mass information. This reference page brings together the published shape data and a CAD download for engineers, detailers, fabricators, and students working with steel framing references.
Use the dimensional data below as a profile reference, then consult related resources on W-shape terminology, steel section properties, and structural steel connections when developing a design or detail. Final member selection and connection design require project-specific engineering verification.
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 : 403.9 mm
Width : 140.5 mm
Web Thickness : 7 mm
Flange Thickness : 11.2 mm
Root Fillet Radius : 10.2 mm
Sectional Area : 58.9 cm2
Unit Weight : 46.2 kg/m
How to read the W16x31 reference
The W designation identifies a wide-flange beam family. The shape is described by its overall depth, flange width, web thickness, flange thickness, root fillet radius, sectional area, and unit weight. These values help users identify the profile in drawings, models, material lists, and section-property references.
Dimensions and section terminology
Overall depth and width describe the envelope of the steel shape. The web is the central vertical element, while the flanges extend outward at the top and bottom. Web and flange thicknesses are important for detailing, connection layout, fabrication review, and section-property calculations. The root fillet is the curved transition between the web and flange, so connection details should account for the actual shape rather than treating the intersection as a sharp corner.
Area and unit weight
The listed sectional area supports section-property and material-quantity references. Unit weight expresses the mass of the member per unit length; it should not be treated as a design load without converting and applying it in the appropriate load combination and unit system.
AISC reference and CAD use
The source identifies AISC 360-16 as the governing specification reference for the stated design, fabrication, and erection context. The downloadable W16x31 DWG can support drafting and coordination workflows. Before using the file for fabrication, verify scale, units, layer conventions, and project-specific detailing requirements.
For broader comparison, connect this page to the site’s W-shape index, steel shape dimensions guide, AISC reference resources, and steel connection detailing guide.
W16x31 FAQ
What does W16x31 mean?
W16x31 identifies a wide-flange, or W-shaped, steel beam profile. The profile designation is used to distinguish this shape from other W-shape entries in structural steel references.
What information is listed for the W16x31?
The reference lists overall dimensions, web and flange thicknesses, root fillet radius, sectional area, and unit weight. These values are useful for profile identification, drafting, quantity review, and preliminary reference work.
Is the W16x31 suitable for every beam application?
No. A member’s use depends on span, loading, support conditions, stability, deflection limits, connection design, material specification, and applicable project requirements. A qualified engineer should verify the complete design.
What is the W16x31 DWG used for?
The DWG provides a CAD reference for incorporating the profile into drawings or coordination models. Check the file’s units and geometry before using it in a production drawing or fabrication document.
What does AISC 360-16 provide?
AISC 360-16 is identified in the source as the AISC Specification for Structural Steel Buildings, covering requirements and guidance associated with the design, fabrication, and erection of steel structures in the United States.
