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UB 840x400x576

Production class: hot rolled (EN 10365)

Section geometry

UB shape
Height (h):
913mm
Width (b):
411mm
Web thickness (tw):
32mm
Flange thickness (tf):
57.9mm
Radius (r):
20mm

Section properties

Moment of inertia (I):mm⁴
Y-axis:
1.012E10
Z-axis:
6.722E8
Elastic section modulus (Wel):mm³
Y-axis:
2.216E7
Z-axis:
3.271E6
Plastic section modulus (Wpl):mm³
Y-axis:
2.556E7
Z-axis:
5.101E6
Radius of gyration (i):mm
Y-axis:
371
Z-axis:
95
Plastic shear area (Av):mm²
Y-axis:
47590
Z-axis:
30020
Weight per meter:
576kg/m
Area (A):
73450mm²
Surface area per meter:
3.372m²/m
Torsion constant (It):
6.167E7mm⁴
Warping constant (Iw):
1.225E14mm⁶

Profile overview for UB 840x400x576

The UB 840x400x576 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 913 mm and a flange width (b) of 411 mm, supported by a 32 mm thick web and 57.9 mm thick flanges. With a cross-sectional area of 73447.56 mm² and a linear mass of 576 kg/m, the UB 840x400x576 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 10117700000 mm⁴ governs major deflection and serviceability limits. To calculate the ultimate bending resistance, engineers may utilize the strong-axis plastic section modulus of 25560000 mm³. For lateral stability and column buckling verifications, the weak-axis moment of inertia (Iz) provides 672200000 mm⁴ of lateral stiffness.

Advanced analysis: For complex load cases, the UB 840x400x576 provides a y-axis shear area (at strong bending axis) of 47593.8 mm² for web shear verification and a torsion constant of 61670000 mm⁴ for calculating rotational twist under eccentric loading. Additionally, a warping constant of 122460000000000 mm⁶ is available for rigorous lateral-torsional buckling (LTB) checks.