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UB 840x400x527

Production class: hot rolled (EN 10365)

Section geometry

UB shape
Height (h):
903mm
Width (b):
409mm
Web thickness (tw):
29.5mm
Flange thickness (tf):
53.1mm
Radius (r):
20mm

Section properties

Moment of inertia (I):mm⁴
Y-axis:
9.151E9
Z-axis:
6.073E8
Elastic section modulus (Wel):mm³
Y-axis:
2.026E7
Z-axis:
2.969E6
Plastic section modulus (Wpl):mm³
Y-axis:
2.327E7
Z-axis:
4.621E6
Radius of gyration (i):mm
Y-axis:
368
Z-axis:
95
Plastic shear area (Av):mm²
Y-axis:
43440
Z-axis:
27530
Weight per meter:
527kg/m
Area (A):
67280mm²
Surface area per meter:
3.349m²/m
Torsion constant (It):
4.777E7mm⁴
Warping constant (Iw):
1.093E14mm⁶

Profile overview for UB 840x400x527

The UB 840x400x527 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 903 mm and a flange width (b) of 409 mm, supported by a 29.5 mm thick web and 53.1 mm thick flanges. With a cross-sectional area of 67284.76 mm² and a linear mass of 527 kg/m, the UB 840x400x527 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 9150800000 mm⁴ governs major deflection and serviceability limits. To calculate the ultimate bending resistance, engineers may utilize the strong-axis plastic section modulus of 23270000 mm³. For lateral stability and column buckling verifications, the weak-axis moment of inertia (Iz) provides 607300000 mm⁴ of lateral stiffness.

Advanced analysis: For complex load cases, the UB 840x400x527 provides a y-axis shear area (at strong bending axis) of 43435.8 mm² for web shear verification and a torsion constant of 47770000 mm⁴ for calculating rotational twist under eccentric loading. Additionally, a warping constant of 109340000000000 mm⁶ is available for rigorous lateral-torsional buckling (LTB) checks.