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UB 305x165x40

Production class: hot rolled (EN 10365)

Section geometry

UB shape
Height (h):
303.4mm
Width (b):
165mm
Web thickness (tw):
6mm
Flange thickness (tf):
10.2mm
Radius (r):
9mm

Section properties

Moment of inertia (I):mm⁴
Y-axis:
8.505E7
Z-axis:
7.643E6
Elastic section modulus (Wel):mm³
Y-axis:
5.606E5
Z-axis:
92650
Plastic section modulus (Wpl):mm³
Y-axis:
6.232E5
Z-axis:
1.417E5
Radius of gyration (i):mm
Y-axis:
128
Z-axis:
38
Plastic shear area (Av):mm²
Y-axis:
3366
Z-axis:
2012
Weight per meter:
40.3kg/m
Area (A):
5130mm²
Surface area per meter:
1.239m²/m
Torsion constant (It):
1.476E5mm⁴
Warping constant (Iw):
1.641E11mm⁶

Profile overview for UB 305x165x40

The UB 305x165x40 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 303.4 mm and a flange width (b) of 165 mm, supported by a 6 mm thick web and 10.2 mm thick flanges. With a cross-sectional area of 5130 mm² and a linear mass of 40.3 kg/m, the UB 305x165x40 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 85050000 mm⁴ governs major deflection and serviceability limits. To calculate the ultimate bending resistance, engineers may utilize the strong-axis plastic section modulus of 623200 mm³. For lateral stability and column buckling verifications, the weak-axis moment of inertia (Iz) provides 7643000 mm⁴ of lateral stiffness.

Advanced analysis: For complex load cases, the UB 305x165x40 provides a y-axis shear area (at strong bending axis) of 3366 mm² for web shear verification and a torsion constant of 147600 mm⁴ for calculating rotational twist under eccentric loading. Additionally, a warping constant of 164100000000 mm⁶ is available for rigorous lateral-torsional buckling (LTB) checks.