The UB 305x127x48 is a Universal Beam reference entry for engineers, detailers, fabricators, and students working with structural steel shapes. This page brings together the source dimensions, section descriptors, standard reference, and a downloadable DWG file.
Use the labeled values below when checking drawings, comparing section designations, or coordinating steelwork details. For design decisions, verify the governing project requirements, material specification, connection details, and applicable design rules.
UB 305x127x48
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 : 311×125.3x9x14
Depth : 311 mm
Width : 125.3 mm
Web Thickness : 9 mm
Flange Thickness : 14 mm
Root Fillet Radius : 8.9 mm
Sectional Area : 61.2 cm2
Unit Weight : 48 kg/m
How to read this UB reference
The designation identifies a Universal Beam section, while the dimensional labels describe its overall geometry and principal parts. The listed depth and width describe the overall envelope of the section. Web thickness and flange thickness help distinguish the web and flanges when reviewing fabrication drawings or CAD details.
The root fillet radius describes the curved transition between the web and flange. This detail is important when checking clearances, detailing connections, and interpreting section geometry rather than treating the shape as a set of sharp rectangular plates.
Section data and practical use
The source content also lists sectional area and unit weight. These values support material takeoff, steel scheduling, and preliminary comparison of sections. They should not be treated as a complete design check: resistance, deflection, buckling, connection behavior, fire performance, and other requirements depend on the project design basis and verified engineering calculations.
Standard and CAD reference
The entry refers to EN 10365:2017, which provides a common reference for dimensions, tolerances, and sectional properties of hot-rolled steel channels, I-beams, and H-beams. The linked DWG resource can help with drafting and coordination, but users should confirm scale, units, drawing conventions, and project-specific requirements before using geometry in production documentation.
Frequently asked questions
What type of section is UB 305x127x48?
It is a Universal Beam section, commonly represented in structural steel drawings and section databases by its designation and listed geometric properties.
What does the dimension entry describe?
The dimension entry summarizes the section geometry using its overall depth and width together with web and flange thickness. The page also identifies the root fillet radius separately.
Which standard is referenced for this section?
The source references EN 10365:2017 for the dimensions, tolerances, and sectional-property framework associated with the listed hot-rolled section types.
Can the DWG file be used directly for fabrication?
The DWG is a drafting reference. Before fabrication, confirm the file against the project drawings, required tolerances, material documentation, connection design, and the applicable engineering review.
Does the listed unit weight complete a structural design check?
No. Unit weight is useful for estimating and scheduling, but structural design also requires the relevant loading, restraint, material, stability, serviceability, and connection checks.
