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UB 406x178x67

Production class: hot rolled (EN 10365)

Section geometry

UB shape
Height (h):
409.4mm
Width (b):
178.8mm
Web thickness (tw):
8.8mm
Flange thickness (tf):
14.3mm
Radius (r):
10mm

Section properties

Moment of inertia (I):mm⁴
Y-axis:
2.431E8
Z-axis:
1.364E7
Elastic section modulus (Wel):mm³
Y-axis:
1.188E6
Z-axis:
1.526E5
Plastic section modulus (Wpl):mm³
Y-axis:
1.345E6
Z-axis:
2.365E5
Radius of gyration (i):mm
Y-axis:
168
Z-axis:
39
Plastic shear area (Av):mm²
Y-axis:
5114
Z-axis:
3848
Weight per meter:
67.1kg/m
Area (A):
8550mm²
Surface area per meter:
1.499m²/m
Torsion constant (It):
4.598E5mm⁴
Warping constant (Iw):
5.316E11mm⁶

Profile overview for UB 406x178x67

The UB 406x178x67 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 409.4 mm and a flange width (b) of 178.8 mm, supported by a 8.8 mm thick web and 14.3 mm thick flanges. With a cross-sectional area of 8550 mm² and a linear mass of 67.1 kg/m, the UB 406x178x67 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 243100000 mm⁴ governs major deflection and serviceability limits. To calculate the ultimate bending resistance, engineers may utilize the strong-axis plastic section modulus of 1345000 mm³. For lateral stability and column buckling verifications, the weak-axis moment of inertia (Iz) provides 13640000 mm⁴ of lateral stiffness.

Advanced analysis: For complex load cases, the UB 406x178x67 provides a y-axis shear area (at strong bending axis) of 5113.68 mm² for web shear verification and a torsion constant of 459800 mm⁴ for calculating rotational twist under eccentric loading. Additionally, a warping constant of 531600000000 mm⁶ is available for rigorous lateral-torsional buckling (LTB) checks.