The W21x111 is a W-shaped structural steel section identified by its overall dimensions, web and flange thicknesses, root fillet radius, sectional area, and unit weight. Use the source data below as the dimensional reference for drafting, estimating, and preliminary section comparison.
This page is part of the SteelSTD reference collection for W shapes, steel section terminology, section properties, and CAD resources. For broader context, compare it with the site’s W-shape reference pages and related guidance on reading structural steel dimensions.
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 : 546.1 mm
Width : 312.4 mm
Web Thickness : 14 mm
Flange Thickness : 22.2 mm
Root Fillet Radius : 12.8 mm
Sectional Area : 210.32 cm2
Unit Weight : 165.1 kg/m
How to read the W21x111 reference
The listed depth and width describe the section’s overall envelope. Web thickness refers to the central vertical element, while flange thickness describes the horizontal top and bottom elements. The root fillet radius identifies the curved transition between the web and each flange; this detail matters when interpreting profile geometry and preparing connection or detailing drawings.
Sectional area is a geometric property used in steel quantity calculations and in engineering checks that depend on cross-sectional area. It should be used together with the applicable design method and verified project requirements rather than treated as a standalone design conclusion.
Unit weight expresses the listed mass per unit length. It is useful for material takeoffs, shipping estimates, and coordination with framing schedules. It is not, by itself, a design load or a substitute for the loads and combinations required for a project.
Specification and CAD reference
The source identifies AISC 360-16 as the governing AISC specification reference for the listed structural-steel information. Designers and detailers should confirm the applicable project specification, material requirements, fabrication provisions, and connection criteria before using the section in a structure.
The downloadable DWG provides a CAD representation of the W21x111 profile. Review the drawing units, layer conventions, insertion behavior, and geometry before incorporating it into production drawings. Related internal resources may include the W-shapes index, steel section properties guide, structural steel terminology reference, and DWG download library.
W21x111 FAQ
What type of section is the W21x111?
It is a W beam, also called a wide-flange structural steel section. The source content lists its overall dimensions and profile properties.
What dimensions are provided for the W21x111?
The reference lists depth, width, web thickness, flange thickness, and root fillet radius. These values describe the section geometry and should be read together with the original source block.
What is the difference between sectional area and unit weight?
Sectional area describes the cross-sectional geometry, while unit weight describes the listed mass per unit length. They serve different purposes in estimating and engineering workflows.
Is the W21x111 automatically suitable for a structural design?
No. Section selection depends on project loads, span, support conditions, stability, connections, material requirements, applicable specifications, and engineering verification.
Is a CAD file available for the W21x111?
Yes. The source includes a DWG download reference for the W21x111 profile. Check the file’s units and geometry before using it in a drawing set.
