The UB 356x171x45 is a Universal Beam reference entry for engineers, detailers, fabricators, and students working with structural steel sections. Use the dimensions and properties below as the primary reference for this section designation.
The page also provides access to a DWG resource, making it useful for checking the section profile in drawings and detailing workflows. Always verify the project specification, material requirements, connection details, and design assumptions before using a steel section in an engineered structure.
UB 356x171x45
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 : 351.4×171.1x7x9.7
Depth : 351.4 mm
Width : 171.1 mm
Web Thickness : 7 mm
Flange Thickness : 9.7 mm
Root Fillet Radius : 10 mm
Sectional Area : 57.3 cm2
Unit Weight : 45 kg/m
How to read the UB 356x171x45 designation
The designation identifies a Universal Beam series section and includes nominal information associated with its size and mass category. The detailed dimensions listed in the reference are more useful for drafting and section-profile checks than the designation alone.
Key section data
- Depth and width: These describe the overall profile envelope and help establish how the beam fits within a structural or architectural detail.
- Web thickness: This describes the thickness of the central web connecting the flanges.
- Flange thickness: This describes the thickness of the horizontal flange elements.
- Root fillet radius: This identifies the curved transition between the web and flange and is important when modeling the profile accurately.
- Sectional area: This is a cross-sectional property used with other engineering information when evaluating a steel member.
- Unit weight: This supports material takeoff and member-weight calculations based on the listed length.
Using the standard reference and DWG file
The entry refers to EN 10365:2017 for the dimensional and sectional-property context of the Universal Beam profile. The downloadable DWG can support CAD coordination, drawing preparation, and profile verification. For broader design work, related references on section properties, steel terminology, and connection detailing can help explain how this dimensional data fits into a complete engineering workflow.
Frequently asked questions
What is a UB 356x171x45?
It is a Universal Beam designation identifying a hot-rolled structural steel section. The page lists its detailed dimensions, sectional area, unit weight, and profile reference information.
What does the dimension string represent?
The dimension string summarizes the section geometry. The individual depth, width, web thickness, flange thickness, and root fillet radius entries provide the dimensional detail needed for checking or modeling the profile.
Why is the root fillet radius important?
The root fillet is the curved transition between the web and flange. Including it in a CAD model or detail can improve the accuracy of the section profile and help avoid treating the beam as a sharp-cornered shape.
What is the DWG file used for?
The DWG file can be used as a CAD reference for drawing layouts, section-profile checks, and coordination. It should be reviewed against the project’s required material and detailing information before issue.
Does this page provide enough information for structural design?
No. The listed geometry and properties are reference data, not a complete design check. Structural design also depends on the applicable project requirements, material specification, loading, restraints, connections, stability considerations, and engineer verification.
