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UB 840x400x473

Production class: hot rolled (EN 10365)

Section geometry

UB shape
Height (h):
893mm
Width (b):
406mm
Web thickness (tw):
26.4mm
Flange thickness (tf):
48mm
Radius (r):
20mm

Section properties

Moment of inertia (I):mm⁴
Y-axis:
8.132E9
Z-axis:
5.367E8
Elastic section modulus (Wel):mm³
Y-axis:
1.821E7
Z-axis:
2.643E6
Plastic section modulus (Wpl):mm³
Y-axis:
2.079E7
Z-axis:
4.100E6
Radius of gyration (i):mm
Y-axis:
367
Z-axis:
94
Plastic shear area (Av):mm²
Y-axis:
38976
Z-axis:
24570
Weight per meter:
473kg/m
Area (A):
60360mm²
Surface area per meter:
3.323m²/m
Torsion constant (It):
3.511E7mm⁴
Warping constant (Iw):
9.556E13mm⁶

Profile overview for UB 840x400x473

The UB 840x400x473 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 893 mm and a flange width (b) of 406 mm, supported by a 26.4 mm thick web and 48 mm thick flanges. With a cross-sectional area of 60360.16 mm² and a linear mass of 473 kg/m, the UB 840x400x473 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 8132000000 mm⁴ governs major deflection and serviceability limits. To calculate the ultimate bending resistance, engineers may utilize the strong-axis plastic section modulus of 20790000 mm³. For lateral stability and column buckling verifications, the weak-axis moment of inertia (Iz) provides 536700000 mm⁴ of lateral stiffness.

Advanced analysis: For complex load cases, the UB 840x400x473 provides a y-axis shear area (at strong bending axis) of 38976 mm² for web shear verification and a torsion constant of 35110000 mm⁴ for calculating rotational twist under eccentric loading. Additionally, a warping constant of 95560000000000 mm⁶ is available for rigorous lateral-torsional buckling (LTB) checks.