The UB 686x254x140 is a Universal Beam designation used to identify a hot-rolled structural steel section. This reference brings together the section dimensions, profile properties, applicable European standard reference, and a CAD download for drafting workflows.
Use the dimensional data below when comparing this beam with other Universal Beams or reviewing a structural steel framing layout. The published values are reference data; member selection and design verification should be completed against the applicable project requirements.
UB 686x254x140
Universal Beams
refer to : EN 10365:2017
a European standard that defines the dimensions, tolerances, and sectional properties for hot-rolled steel channels, I-beams, and H-beams used in construction and engineering. It ensures uniformity and compatibility across European structural steel products.
Dimension : 683.5×253.7×12.4×19
Depth : 683.5 mm
Width : 253.7 mm
Web Thickness : 12.4 mm
Flange Thickness : 19 mm
Root Fillet Radius : 15 mm
Sectional Area : 178.4 cm2
Unit Weight : 140 kg/m
How to read the UB 686x254x140 data
The dimension string is presented as depth, width, web thickness, and flange thickness. These values describe the principal geometry of the section and help distinguish this UB from nearby sizes in a beam schedule or steel library.
Section geometry
Depth and width describe the overall envelope of the section. Web thickness identifies the thickness of the central web, while flange thickness describes the flange material. The listed root fillet radius accounts for the curved transition between the web and each flange, which is important when checking clearances, detailing connections, or preparing fabrication drawings.
Section properties and weight
The sectional area is useful for steel quantity calculations and for interpreting section-property data used in engineering checks. The listed unit weight supports preliminary material takeoffs and handling estimates. Neither value alone establishes structural capacity; design checks must consider the governing loads, restraints, steel grade, connection details, and applicable design rules.
Standard and CAD reference
The page identifies EN 10365:2017 as the dimensional and sectional reference for the profile. The available DWG file can support CAD coordination, layout work, and detailing. Confirm drawing units, scale, layer conventions, and project-specific fabrication requirements before using the file in issued documentation.
For broader comparison, connect this reference with related Universal Beam dimensions, EN 10365 section references, and the site’s guidance on steel section properties and connection detailing.
Frequently asked questions
What does UB 686x254x140 mean?
It is the designation for a Universal Beam profile. The source data identifies its geometric dimensions and its unit weight so the section can be distinguished from other UB sizes.
What standard is referenced for this beam?
The page refers to EN 10365:2017, which provides a standardized basis for dimensions, tolerances, and sectional properties of listed hot-rolled steel sections.
What is the root fillet used for?
The root fillet is the curved transition where the web meets a flange. It should be considered when checking connection clearances, bearing details, coping, and accurate CAD representation.
Can the DWG file be used directly for structural design?
The DWG is a drafting reference, not a substitute for engineering design. Verify the drawing against the project specification and the authoritative section data before using it for fabrication or issued construction documents.
