The W12x120 is a wide-flange structural steel section identified in the source data as a W beam. This reference provides its published geometric properties, unit weight, and the applicable AISC specification context for engineers, detailers, estimators, and students.
Use the values below as a section-reference resource, then verify material specifications, design assumptions, connection requirements, and project criteria against the governing contract documents and the responsible engineer’s calculations.
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 : 332.7 mm
Width : 312.4 mm
Web Thickness : 18 mm
Flange Thickness : 28.2 mm
Root Fillet Radius : 15 mm
Sectional Area : 227.1 cm2
Unit Weight : 178.3 kg/m
How to read the W12x120 reference
The listed depth and width describe the overall envelope of the section. Web thickness and flange thickness help distinguish the proportions of the web and flanges, while the root fillet radius describes the transition between those elements. These dimensions are useful when checking clearances, preparing details, and coordinating steel geometry with connections or adjacent construction.
Sectional area is a geometric property used in calculations such as axial resistance and material takeoff. Unit weight expresses the section’s mass per unit length and can support estimating, shipping, handling, and framing coordination. Neither property, by itself, establishes a member’s allowable capacity; design also depends on material, unbraced length, loads, restraints, connections, and applicable limit states.
AISC and drafting context
The source identifies AISC 360-16, the 2016 edition of the AISC Specification for Structural Steel Buildings, as the governing reference context. Readers comparing this shape with other sections should keep the specification edition and the source of the section data visible in project documentation.
For CAD coordination, the downloadable DWG can help with two-dimensional detailing and layout. A drawing file should still be checked against the dimensional reference before fabrication or release, especially where fillets, copes, holes, welds, and connection components affect fit-up.
Related SteelSTD resources may include the W-shapes reference, steel section properties guide, AISC terminology overview, and structural steel connection detailing guidance. These are useful companion topics when moving from a section lookup to member design or shop-detail development.
W12x120 FAQ
What type of section is the W12x120?
It is identified in the source content as a W beam, commonly described as a wide-flange structural steel shape.
What information is provided for the W12x120?
The reference lists overall depth, overall width, web thickness, flange thickness, root fillet radius, sectional area, and unit weight.
What does the AISC 360-16 reference indicate?
It identifies the AISC Specification for Structural Steel Buildings, 2016 edition, as the specification context noted by the source. Project teams should confirm the governing requirements for the specific work.
Can the listed properties be used as a complete design check?
No. Section properties are reference inputs, not a complete member design. Capacity and detailing depend on the applicable loads, restraints, material requirements, connections, construction conditions, and engineering verification.
What is the DWG file useful for?
The DWG can support drafting and CAD coordination. Confirm the drawing geometry against the published reference and project requirements before using it for fabrication or construction documentation.
