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UB 305x102x25

Production class: hot rolled (EN 10365)

Section geometry

UB shape
Height (h):
305.1mm
Width (b):
101.6mm
Web thickness (tw):
5.8mm
Flange thickness (tf):
7mm
Radius (r):
8mm

Section properties

Moment of inertia (I):mm⁴
Y-axis:
4.466E7
Z-axis:
1.229E6
Elastic section modulus (Wel):mm³
Y-axis:
2.927E5
Z-axis:
24200
Plastic section modulus (Wpl):mm³
Y-axis:
3.427E5
Z-axis:
38830
Radius of gyration (i):mm
Y-axis:
118
Z-axis:
19
Plastic shear area (Av):mm²
Y-axis:
1422
Z-axis:
1895
Weight per meter:
24.8kg/m
Area (A):
3160mm²
Surface area per meter:
0.991m²/m
Torsion constant (It):
48330mm⁴
Warping constant (Iw):
2.718E10mm⁶

Profile overview for UB 305x102x25

The UB 305x102x25 is a structural steel cross-section utilized in commercial construction, industrial framing, and mechanical engineering. Manufactured as a hot rolled section, it complies with EN 10365 dimensional standards, ensuring predictability in detailing and fabrication.Access to its exact geometric and statical properties is essential for 3D modeling and structural verification.

Geometry: This open profile features a total depth (h) of 305.1 mm and a flange width (b) of 101.6 mm, supported by a 5.8 mm thick web and 7 mm thick flanges. With a cross-sectional area of 3160 mm² and a linear mass of 24.8 kg/m, the UB 305x102x25 offers a distinct stiffness-to-weight ratio for both column (axial) and beam applications.

Section properties: For design of bending, the major and minor axis properties dictate the member's structural capacity. The strong-axis moment of inertia (Iy) of 44660000 mm⁴ governs major deflection and serviceability limits. To calculate the ultimate bending resistance, engineers may utilize the strong-axis plastic section modulus of 342700 mm³. For lateral stability and column buckling verifications, the weak-axis moment of inertia (Iz) provides 1229000 mm⁴ of lateral stiffness.

Advanced analysis: For complex load cases, the UB 305x102x25 provides a y-axis shear area (at strong bending axis) of 1422.4 mm² for web shear verification and a torsion constant of 48330 mm⁴ for calculating rotational twist under eccentric loading. Additionally, a warping constant of 27180000000 mm⁶ is available for rigorous lateral-torsional buckling (LTB) checks.