The W21x101 is a wide-flange structural steel shape identified by its W-shape designation and nominal weight designation. This reference provides the listed geometric dimensions, sectional area, unit weight, AISC context, and a DWG download for drafting and coordination.
Use the source values below as the local reference for this shape. For design work, review the applicable section properties, material requirements, loading, stability, connection conditions, and project specifications rather than treating the shape designation alone as a design conclusion.
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 : 543.6 mm
Width : 312.4 mm
Web Thickness : 12.7 mm
Flange Thickness : 20.3 mm
Root Fillet Radius : 12.7 mm
Sectional Area : 192.26 cm2
Unit Weight : 150.9 kg/m
How to read the W21x101 reference
The W-shape designation identifies a wide-flange member, while the number after the designation is associated with the member’s listed unit weight. The dimensional data describes the overall depth and width, web and flange thicknesses, and root fillet radius. These features are useful when checking framing clearances, connection geometry, detailing constraints, and CAD representations.
Dimensions, area, and unit weight
The source content lists the W21x101’s depth, width, web thickness, flange thickness, root fillet radius, sectional area, and unit weight. Keep the units shown in the reference when transferring values into calculations, schedules, estimating workflows, or fabrication documentation.
Sectional area and unit weight serve different purposes: area is commonly used in section-property and material calculations, while unit weight supports material takeoffs and handling estimates. Neither value, by itself, establishes structural capacity. Capacity and serviceability depend on the governing design requirements and verified section properties.
AISC and drafting context
The reference identifies AISC 360-16 as the governing specification context for the listed shape information. Designers and detailers should coordinate the shape with the applicable steel design provisions, connection details, fabrication requirements, and erection conditions. The linked DWG resource can support drafting workflows, but the downloaded geometry should be checked against the project reference before use in production documents.
For related research, link this page to the site’s guides for W-shapes, AISC 360-16, steel section properties, steel connections, and DWG detailing resources.
W21x101 FAQ
What type of section is W21x101?
W21x101 is a W-shape, also commonly described as a wide-flange structural steel section.
What information is provided for W21x101?
The reference lists its depth, width, web thickness, flange thickness, root fillet radius, sectional area, and unit weight, along with AISC context and a DWG download.
Does the W21x101 designation establish structural capacity?
No. The designation and listed dimensions do not, by themselves, establish axial, bending, shear, stability, or connection capacity. Those checks require the applicable design information and engineering verification.
Can the W21x101 DWG file be used directly for fabrication?
The DWG is a drafting reference. Confirm its geometry, units, revision control, and project requirements before using it in fabrication or issued construction documents.
Why are the root fillet and thicknesses important?
Web and flange thicknesses affect detailing and section calculations, while the root fillet influences clearances and the fit of connected or adjoining components.
