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UB 690x360x350

Production class: hot rolled (EN 10365)

Section geometry

UB shape
Height (h):
728mm
Width (b):
360mm
Web thickness (tw):
23.1mm
Flange thickness (tf):
40.9mm
Radius (r):
20mm

Section properties

Moment of inertia (I):mm⁴
Y-axis:
4.034E9
Z-axis:
3.187E8
Elastic section modulus (Wel):mm³
Y-axis:
1.108E7
Z-axis:
1.771E6
Plastic section modulus (Wpl):mm³
Y-axis:
1.263E7
Z-axis:
2.742E6
Radius of gyration (i):mm
Y-axis:
300
Z-axis:
84
Plastic shear area (Av):mm²
Y-axis:
29448
Z-axis:
17850
Weight per meter:
350kg/m
Area (A):
44720mm²
Surface area per meter:
2.815m²/m
Torsion constant (It):
1.953E7mm⁴
Warping constant (Iw):
3.753E13mm⁶

Profile overview for UB 690x360x350

The UB 690x360x350 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 728 mm and a flange width (b) of 360 mm, supported by a 23.1 mm thick web and 40.9 mm thick flanges. With a cross-sectional area of 44718.58 mm² and a linear mass of 350 kg/m, the UB 690x360x350 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 4034000000 mm⁴ governs major deflection and serviceability limits. To calculate the ultimate bending resistance, engineers may utilize the strong-axis plastic section modulus of 12630000 mm³. For lateral stability and column buckling verifications, the weak-axis moment of inertia (Iz) provides 318700000 mm⁴ of lateral stiffness.

Advanced analysis: For complex load cases, the UB 690x360x350 provides a y-axis shear area (at strong bending axis) of 29448 mm² for web shear verification and a torsion constant of 19530000 mm⁴ for calculating rotational twist under eccentric loading. Additionally, a warping constant of 37530000000000 mm⁶ is available for rigorous lateral-torsional buckling (LTB) checks.