The W27x129 is a wide-flange structural steel shape identified by its nominal section designation. This reference page presents the source-listed dimensions, area, unit weight, and related terminology for use in preliminary engineering review, steel detailing, and CAD coordination.
Use the data below as a section-reference resource rather than as a complete design check. Project-specific design also requires confirmed material information, applied loads, support conditions, connection details, applicable building requirements, and review by a qualified engineer.
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 : 701 mm
Width : 254 mm
Web Thickness : 15.5 mm
Flange Thickness : 27.9 mm
Root Fillet Radius : 15.2 mm
Sectional Area : 243.87 cm2
Unit Weight : 191.4 kg/m
How to read the W27x129 reference
The source content identifies this member as a W Beam and lists its overall depth, flange width, web thickness, flange thickness, root fillet radius, sectional area, and unit weight. These properties help engineers and detailers distinguish the shape from other W sections and coordinate it with framing plans, connection details, and fabrication documents.
Dimensions and section terminology
Depth describes the overall section height, while width describes the flange extent across the member. The web thickness relates to the central vertical element, and the flange thickness describes the thickness of the horizontal elements. The root fillet radius represents the curved transition between the web and flange, which is important when considering detailing, clearances, and connection geometry.
Area and unit weight
Sectional area is a basic geometric property used in material and member calculations. Unit weight supports estimating member self-weight, material quantities, shipping information, and framing takeoffs. These values should be used with the units shown in the source and should not be confused with strength or allowable-capacity data.
AISC and CAD reference use
The source identifies AISC 360-16 as the governing specification reference for structural steel building design, fabrication, and erection in the United States. The downloadable DWG can support drafting and coordination, but the drawing should be checked against the project’s approved standards, detailing requirements, and fabrication information before use.
For related research, see the site’s references on W-shape terminology, steel section properties, structural steel connections, and CAD/DWG detailing workflows.
W27x129 frequently asked questions
What type of section is W27x129?
W27x129 is identified in the source as a W Beam, also commonly described as a wide-flange structural steel shape.
What information is provided for this section?
The reference lists the section depth, width, web thickness, flange thickness, root fillet radius, sectional area, and unit weight. It does not by itself provide a complete member-capacity evaluation.
Which specification is referenced?
The source refers to the American Institute of Steel Construction Specification for Structural Steel Buildings, AISC 360-16. Always confirm the specification and project requirements that apply to the work being performed.
Can the DWG be used directly for fabrication?
The DWG is a drafting reference and should be reviewed before use. Fabrication drawings must reflect the approved project geometry, material requirements, connection design, tolerances, and applicable detailing procedures.
Does unit weight determine structural capacity?
No. Unit weight describes the member’s mass per unit length. Structural capacity depends on the member, material, loading, restraint, limit state, connections, and applicable design requirements.
