This page is a dimensional and CAD reference for the UB 920x420x1077 universal beam. The verified listing below identifies the governing dimensional reference, overall section dimensions, web and flange thicknesses, root fillet radius, sectional area, and unit weight.
Use the designation to locate the section, but use the stated dimensions when checking clearances or preparing a drawing. A nominal shape name does not replace the detailed geometry shown in the section data. The accompanying DWG can support drafting and coordination, subject to verification against the project design documents.
UB 920x420x1077
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 : 1061x451x55x99.1
Depth : 1061 mm
Width : 451 mm
Web Thickness : 55 mm
Flange Thickness : 99.1 mm
Root Fillet Radius : 19 mm
Sectional Area : 1372 cm2
Unit Weight : 1077 kg/m
How to read the UB section information
A universal beam is a hot-rolled, open steel section with two flanges connected by a central web. The listed depth describes the overall vertical size, while the width describes the overall flange width. Web thickness applies to the central plate-like portion of the profile, and flange thickness applies to the projecting upper and lower portions.
The root fillet radius describes the curved transition where the web meets each flange. This transition matters in detailed modeling because it affects the true internal profile and can influence the placement of connection plates, bolts, welds, copes, and fitted components.
Sectional area and unit weight
Sectional area represents the steel area in a cross-section perpendicular to the member length. It is commonly used in property calculations and quantity checks. Unit weight expresses the member mass per unit length and can support material takeoffs when it is multiplied by the required member length.
Do not treat unit weight as a load capacity. Structural resistance depends on additional factors, including material grade, member length, restraint, loading direction, stability, connection behavior, and the applicable design rules. Those inputs are not established by the shape designation alone.
Using the DWG in a detailing workflow
- Confirm drawing units: Check the CAD file units and insertion scale before incorporating the geometry into another model or detail.
- Check the section orientation: Verify the web centerline, flange direction, and intended member axis.
- Retain realistic fillets: Avoid replacing curved web-to-flange transitions with sharp corners where connection clearance is important.
- Verify critical geometry: Compare the imported profile with the dimensions listed on this page and with the project specifications.
- Coordinate connections separately: Base plates, end plates, stiffeners, bolts, welds, copes, and erection clearances require project-specific design and detailing.
Related reference topics
Useful companion subjects include universal beam designation conventions, I-shape terminology, section-property concepts, steel unit-weight calculations, bolted and welded connection detailing, and CAD block verification. When comparing this shape with another beam, compare the complete dimensional and property set rather than relying only on the nominal designation.
Limits of this reference
The information on this page identifies section geometry and basic reference data. It does not provide a complete structural design check or confirm suitability for a particular span, load, connection, fabrication process, or project environment. Properties or capacities not explicitly listed should be obtained from verified design documentation rather than inferred from the drawing.
Frequently asked questions
What does UB mean in the section name?
UB means universal beam, a hot-rolled I-shaped steel section with flanges connected by a web.
Should the designation be used as the fabrication dimensions?
No. The designation is an identifier. Drafting, clearance checks, and fabrication coordination should use the verified dimensions stated in the section listing and the applicable project documents.
Why is the root fillet radius relevant?
The radius defines the curved web-to-flange transition. It can affect the fit of plates, stiffeners, weld preparations, copes, and other connection components placed near the web-flange junction.
What is the difference between sectional area and unit weight?
Sectional area describes the amount of steel in the cross-section. Unit weight describes mass per unit member length. They are related reference quantities, but neither independently states the beam’s structural capacity.
Can the DWG be used directly in a project model?
It can be used as a drafting reference after checking units, scale, orientation, geometry, and compatibility with the project’s specified section. Connection details and structural adequacy still require project-specific verification.
