Back to All Sections

UB 406x178x54

Production class: hot rolled (EN 10365)

Section geometry

UB shape
Height (h):
402.6mm
Width (b):
177.7mm
Web thickness (tw):
7.7mm
Flange thickness (tf):
10.9mm
Radius (r):
10mm

Section properties

Moment of inertia (I):mm⁴
Y-axis:
1.871E8
Z-axis:
1.021E7
Elastic section modulus (Wel):mm³
Y-axis:
9.294E5
Z-axis:
1.149E5
Plastic section modulus (Wpl):mm³
Y-axis:
1.053E6
Z-axis:
1.782E5
Radius of gyration (i):mm
Y-axis:
164
Z-axis:
38
Plastic shear area (Av):mm²
Y-axis:
3874
Z-axis:
3319
Weight per meter:
54.1kg/m
Area (A):
6900mm²
Surface area per meter:
1.483m²/m
Torsion constant (It):
2.304E5mm⁴
Warping constant (Iw):
3.910E11mm⁶

Profile overview for UB 406x178x54

The UB 406x178x54 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 402.6 mm and a flange width (b) of 177.7 mm, supported by a 7.7 mm thick web and 10.9 mm thick flanges. With a cross-sectional area of 6900 mm² and a linear mass of 54.1 kg/m, the UB 406x178x54 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 187100000 mm⁴ governs major deflection and serviceability limits. To calculate the ultimate bending resistance, engineers may utilize the strong-axis plastic section modulus of 1053000 mm³. For lateral stability and column buckling verifications, the weak-axis moment of inertia (Iz) provides 10210000 mm⁴ of lateral stiffness.

Advanced analysis: For complex load cases, the UB 406x178x54 provides a y-axis shear area (at strong bending axis) of 3873.86 mm² for web shear verification and a torsion constant of 230400 mm⁴ for calculating rotational twist under eccentric loading. Additionally, a warping constant of 391000000000 mm⁶ is available for rigorous lateral-torsional buckling (LTB) checks.