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UB 203x133x30

Production class: hot rolled (EN 10365)

Section geometry

UB shape
Height (h):
206.8mm
Width (b):
133.9mm
Web thickness (tw):
6.4mm
Flange thickness (tf):
9.6mm
Radius (r):
8mm

Section properties

Moment of inertia (I):mm⁴
Y-axis:
2.900E7
Z-axis:
3.846E6
Elastic section modulus (Wel):mm³
Y-axis:
2.804E5
Z-axis:
57450
Plastic section modulus (Wpl):mm³
Y-axis:
3.148E5
Z-axis:
88250
Radius of gyration (i):mm
Y-axis:
87
Z-axis:
31
Plastic shear area (Av):mm²
Y-axis:
2571
Z-axis:
1470
Weight per meter:
30kg/m
Area (A):
3820mm²
Surface area per meter:
0.923m²/m
Torsion constant (It):
1.039E5mm⁴
Warping constant (Iw):
3.734E10mm⁶

Profile overview for UB 203x133x30

The UB 203x133x30 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 206.8 mm and a flange width (b) of 133.9 mm, supported by a 6.4 mm thick web and 9.6 mm thick flanges. With a cross-sectional area of 3820 mm² and a linear mass of 30 kg/m, the UB 203x133x30 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 29000000 mm⁴ governs major deflection and serviceability limits. To calculate the ultimate bending resistance, engineers may utilize the strong-axis plastic section modulus of 314800 mm³. For lateral stability and column buckling verifications, the weak-axis moment of inertia (Iz) provides 3846000 mm⁴ of lateral stiffness.

Advanced analysis: For complex load cases, the UB 203x133x30 provides a y-axis shear area (at strong bending axis) of 2570.88 mm² for web shear verification and a torsion constant of 103900 mm⁴ for calculating rotational twist under eccentric loading. Additionally, a warping constant of 37340000000 mm⁶ is available for rigorous lateral-torsional buckling (LTB) checks.