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UB 356x171x51

Production class: hot rolled (EN 10365)

Section geometry

UB shape
Height (h):
355mm
Width (b):
171.5mm
Web thickness (tw):
7.4mm
Flange thickness (tf):
11.5mm
Radius (r):
10mm

Section properties

Moment of inertia (I):mm⁴
Y-axis:
1.412E8
Z-axis:
9.682E6
Elastic section modulus (Wel):mm³
Y-axis:
7.958E5
Z-axis:
1.129E5
Plastic section modulus (Wpl):mm³
Y-axis:
8.954E5
Z-axis:
1.741E5
Radius of gyration (i):mm
Y-axis:
147
Z-axis:
38
Plastic shear area (Av):mm²
Y-axis:
3945
Z-axis:
2857
Weight per meter:
51kg/m
Area (A):
6490mm²
Surface area per meter:
1.364m²/m
Torsion constant (It):
2.372E5mm⁴
Warping constant (Iw):
2.851E11mm⁶

Profile overview for UB 356x171x51

The UB 356x171x51 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 355 mm and a flange width (b) of 171.5 mm, supported by a 7.4 mm thick web and 11.5 mm thick flanges. With a cross-sectional area of 6490 mm² and a linear mass of 51 kg/m, the UB 356x171x51 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 141200000 mm⁴ governs major deflection and serviceability limits. To calculate the ultimate bending resistance, engineers may utilize the strong-axis plastic section modulus of 895400 mm³. For lateral stability and column buckling verifications, the weak-axis moment of inertia (Iz) provides 9682000 mm⁴ of lateral stiffness.

Advanced analysis: For complex load cases, the UB 356x171x51 provides a y-axis shear area (at strong bending axis) of 3944.5 mm² for web shear verification and a torsion constant of 237200 mm⁴ for calculating rotational twist under eccentric loading. Additionally, a warping constant of 285100000000 mm⁶ is available for rigorous lateral-torsional buckling (LTB) checks.