W21x275 is a wide-flange structural steel shape identified by the W-shape designation system. This reference page brings together the section dimensions and mass information provided in the source data, along with context for interpreting the listing during steel design, detailing, and drafting work.
Use the dimensional data below as the authoritative local reference for this shape. For broader guidance, see related resources on W-shapes, steel section properties, and structural steel terminology.
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 : 612.1 mm
Width : 327.7 mm
Web Thickness : 31 mm
Flange Thickness : 55.6 mm
Root Fillet Radius : 30 mm
Sectional Area : 527.74 cm2
Unit Weight : 414.3 kg/m
How to read the W21x275 designation
The W identifies a wide-flange beam family. The remaining designation distinguishes this individual shape within the series. Section designations are useful for communicating a member selection consistently between engineers, fabricators, detailers, and CAD users.
What the listed properties describe
The source content reports the overall depth and width, web and flange thicknesses, root fillet radius, sectional area, and unit weight for W21x275. Together, these entries describe the physical geometry and material quantity of the rolled section. They should be read alongside the project’s governing design requirements and the applicable material and fabrication information.
Thickness and fillet entries are especially relevant when preparing connection details, checking clearances, or modeling the shape in structural steel software. The sectional area and unit weight support material takeoff and reference calculations, but they do not by themselves establish member capacity or design suitability.
AISC reference context
The source points to AISC 360-16, the AISC Specification for Structural Steel Buildings. That specification provides requirements for the design, fabrication, and erection of steel structures. Always confirm the governing project edition, material specification, load criteria, connection assumptions, and engineering checks before using a shape in a design.
CAD and drafting workflow
A DWG download is provided with this entry for drawing and modeling workflows. After importing the file, verify units, layer conventions, orientation, and any project-specific detailing requirements. Related pages on CAD/DWG reference resources and connection detailing can help place the section data in a broader drafting workflow.
Frequently asked questions
What type of section is W21x275?
W21x275 is a W-shape, also called a wide-flange structural steel section. Its designation identifies the shape within the W-shape series.
What information is listed for W21x275?
The reference lists depth, width, web thickness, flange thickness, root fillet radius, sectional area, and unit weight. These are section-reference properties, not a complete structural design check.
Does the DWG file replace engineering verification?
No. A DWG file supports drafting and coordination, but the engineer remains responsible for confirming the selected shape, design assumptions, material requirements, connections, and project compliance.
