UB 920x420x390 is a Universal Beam reference entry for engineers, detailers, fabricators, and CAD users working with European structural steel sections. The source data identifies the section dimensions, mass per unit length, sectional area, and the referenced EN 10365:2017 standard.
Use the dimensional information below as a section-identification reference. For structural design, confirm material grade, loading, restraint, connection details, buckling conditions, corrosion allowance, and project requirements through the applicable design process.
UB 920x420x390
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 : 936x420x21.3×36.6
Depth : 936 mm
Width : 420 mm
Web Thickness : 21.3 mm
Flange Thickness : 36.6 mm
Root Fillet Radius : 19 mm
Sectional Area : 494.3 cm2
Unit Weight : 388 kg/m
How to read this UB reference
The dimension line describes the overall section form and its principal thicknesses. Depth and width identify the external envelope of the beam, while web thickness and flange thickness describe the main load-carrying components of the cross-section. The root fillet radius represents the transition between the web and flange, which is important when checking detailing clearances and modeling the profile in CAD.
Sectional area and unit weight
Sectional area is a cross-sectional property used in engineering calculations and section comparisons. Unit weight expresses the mass of the steel section per unit length. It is useful for estimating member self-weight, handling requirements, shipping information, and the weight of steelwork shown in a model or quantity takeoff. It should not be treated as a substitute for a complete structural design check.
Why the standard reference matters
The cited EN 10365:2017 reference provides a consistent basis for identifying dimensions, tolerances, and sectional properties for European hot-rolled steel sections. When ordering, detailing, or checking an imported model, compare the section designation and profile dimensions with the project specification and the supplier’s mill documentation.
CAD and drafting use
The associated DWG resource can support preliminary drafting, coordination, and profile modeling. Before using the drawing for fabrication or final issue, check the drawing units, layer information, profile orientation, fillet representation, and revision status against the project’s drafting standards.
Frequently asked questions
What does UB mean?
UB means Universal Beam, a family of structural steel sections with flanges and a connecting web. The designation identifies a specific section within that family.
What information is provided for this section?
The reference provides the section designation, overall dimensions, web and flange thicknesses, root fillet radius, sectional area, unit weight, and the cited EN 10365:2017 standard.
What is the difference between sectional area and unit weight?
Sectional area describes the size of the steel cross-section. Unit weight describes the mass of the section along its length. Both are useful reference properties, but neither alone establishes whether a member is adequate for a particular design.
Can the DWG file be used directly for fabrication?
The DWG should be treated as a reference and coordination resource. Confirm dimensions, units, tolerances, material requirements, connections, and revision control before using any drawing for fabrication or construction documentation.
Does the section designation provide a complete design specification?
No. A section designation identifies the profile, but structural design also depends on the specified steel material, loading, support conditions, stability checks, connection design, and applicable project standards.
