The W30x99 is a wide-flange structural steel shape listed with dimensional and mass information for reference, drafting, and preliminary engineering work. This page keeps the source values together with an explanation of what each field means.
Use the listing alongside applicable project specifications, material requirements, connection details, and engineering calculations. The associated DWG resource can support CAD workflows, but the drawing should be checked against the project’s required fabrication and detailing information.
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 : 754.4 mm
Width : 266.7 mm
Web Thickness : 13.2 mm
Flange Thickness : 17 mm
Root Fillet Radius : 16.5 mm
Sectional Area : 187.1 cm2
Unit Weight : 146.9 kg/m
How to read the W30x99 reference
The listed depth describes the overall vertical size of the section, while the width describes the overall flange dimension. These dimensions help identify the shape in structural layouts, framing plans, and section drawings.
Web thickness and flange thickness describe the principal plate-like elements of the W-shape. They are useful when reviewing connection clearances, detailing interfaces, fabrication information, and section geometry. The root fillet radius identifies the rounded transition between the web and flange, which is important when a detail must fit closely against the shape.
The listed sectional area supports material takeoffs and section-property reference work. The unit weight is useful for estimating member self-weight and transportation or handling quantities. Neither value, by itself, establishes a member’s capacity or confirms that the shape is suitable for a particular design.
Specification and CAD context
The source identifies the section with the AISC 360-16 specification context. Always verify the governing project edition, material grade, loading, limit states, connection design, and fabrication requirements before using a steel shape in a structural design.
A DWG file is provided for the W30x99 reference. Treat CAD geometry as drafting assistance rather than a substitute for the authoritative section data, project documents, or reviewed engineering drawings.
W30x99 frequently asked questions
What does the W in W30x99 mean?
The W designation identifies a wide-flange structural steel shape. The complete designation distinguishes this section from other W-shape listings.
What is the difference between sectional area and unit weight?
Sectional area describes the amount of steel in the cross-section. Unit weight expresses the mass associated with a length of the member. They serve different purposes in quantity takeoffs, self-weight estimates, and reference work.
Can the listed dimensions be used alone for structural design?
No. Shape dimensions are only part of a design check. Engineers must also consider material properties, span, loads, stability, limit states, connections, detailing, fabrication, and the governing project requirements.
Is the DWG file suitable for fabrication?
The DWG is intended as a CAD reference. Review it against the source dimensions and project drawings before using it for detailing or fabrication documentation.
