The W18x158 is a W-shape reference entry for engineers, detailers, fabricators, and estimators working with structural steel. The source data below provides its listed dimensions, section area, unit weight, and root fillet radius in metric units.
Use this page alongside the site’s references for W-shape terminology, steel section properties, and connection and detailing concepts. The listed values are reference data; structural design, member selection, and connection design require the applicable project requirements and 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 : 500.4 mm
Width : 287 mm
Web Thickness : 20.6 mm
Flange Thickness : 36.6 mm
Root Fillet Radius : 10.2 mm
Sectional Area : 298.71 cm2
Unit Weight : 234.5 kg/m
How to read the W18x158 reference
The W-shape designation identifies a standardized structural steel member in the source catalog. The designation is a catalog label, while the actual geometric properties should be taken from the reference data shown on this page rather than inferred from the name alone.
Dimensions and geometry
Depth, width, web thickness, and flange thickness describe the primary cross-sectional geometry. These dimensions help detailers coordinate framing, clearances, copes, stiffeners, seats, and other connection components. The root fillet is also important where plates, welds, or fitting components approach the junction between the web and flange.
Section area and unit weight
Sectional area is a geometric property used in engineering calculations such as axial-force evaluation, subject to the governing design method and material assumptions. Unit weight supports preliminary material takeoffs, shipping estimates, and steel quantity comparisons. Neither value alone establishes the member’s strength or suitability for a specific application.
AISC reference and CAD workflow
The source identifies AISC 360-16 as the governing reference for structural steel building design, fabrication, and erection information in the United States. Review the applicable project specification and current governing requirements before using catalog data for design or fabrication. The downloadable DWG file can support drafting and coordination, but drawings should be checked against the project’s approved member schedule and connection details.
W18x158 frequently asked questions
What type of steel section is the W18x158?
It is a W-shape, commonly used as a rolled structural steel section. The page’s source data defines the listed geometry and properties for this catalog entry.
What information is provided for the W18x158?
The reference includes depth, width, web thickness, flange thickness, root fillet radius, sectional area, and unit weight, along with an AISC 360-16 reference.
Can the W18x158 be selected directly for a beam or column?
No. Member selection depends on loads, span, support conditions, bracing, limit states, material requirements, serviceability criteria, connections, and the governing project code. A qualified engineer should verify the application.
Is a CAD file available?
Yes. The page includes a DWG download link for the W18x158. Confirm units, layer standards, orientation, and project coordination requirements before incorporating the file into construction documents.
