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UB 305x102x33

Production class: hot rolled (EN 10365)

Section geometry

UB shape
Height (h):
312.7mm
Width (b):
102.4mm
Web thickness (tw):
6.6mm
Flange thickness (tf):
10.8mm
Radius (r):
8mm

Section properties

Moment of inertia (I):mm⁴
Y-axis:
6.512E7
Z-axis:
1.941E6
Elastic section modulus (Wel):mm³
Y-axis:
4.165E5
Z-axis:
37910
Plastic section modulus (Wpl):mm³
Y-axis:
4.815E5
Z-axis:
60070
Radius of gyration (i):mm
Y-axis:
124
Z-axis:
21
Plastic shear area (Av):mm²
Y-axis:
2212
Z-axis:
2220
Weight per meter:
32.8kg/m
Area (A):
4180mm²
Surface area per meter:
1.008m²/m
Torsion constant (It):
1.230E5mm⁴
Warping constant (Iw):
4.403E10mm⁶

Profile overview for UB 305x102x33

The UB 305x102x33 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 312.7 mm and a flange width (b) of 102.4 mm, supported by a 6.6 mm thick web and 10.8 mm thick flanges. With a cross-sectional area of 4180 mm² and a linear mass of 32.8 kg/m, the UB 305x102x33 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 65120000 mm⁴ governs major deflection and serviceability limits. To calculate the ultimate bending resistance, engineers may utilize the strong-axis plastic section modulus of 481500 mm³. For lateral stability and column buckling verifications, the weak-axis moment of inertia (Iz) provides 1941000 mm⁴ of lateral stiffness.

Advanced analysis: For complex load cases, the UB 305x102x33 provides a y-axis shear area (at strong bending axis) of 2211.84 mm² for web shear verification and a torsion constant of 123000 mm⁴ for calculating rotational twist under eccentric loading. Additionally, a warping constant of 44030000000 mm⁶ is available for rigorous lateral-torsional buckling (LTB) checks.