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UB 686x254x152

Production class: hot rolled (EN 10365)

Section geometry

UB shape
Height (h):
687.5mm
Width (b):
254.5mm
Web thickness (tw):
13.2mm
Flange thickness (tf):
21mm
Radius (r):
20mm

Section properties

Moment of inertia (I):mm⁴
Y-axis:
1.518E9
Z-axis:
5.786E7
Elastic section modulus (Wel):mm³
Y-axis:
4.416E6
Z-axis:
4.547E5
Plastic section modulus (Wpl):mm³
Y-axis:
5.046E6
Z-axis:
7.120E5
Radius of gyration (i):mm
Y-axis:
278
Z-axis:
54
Plastic shear area (Av):mm²
Y-axis:
10689
Z-axis:
9981
Weight per meter:
152kg/m
Area (A):
19410mm²
Surface area per meter:
2.332m²/m
Torsion constant (It):
2.312E6mm⁴
Warping constant (Iw):
6.407E12mm⁶

Profile overview for UB 686x254x152

The UB 686x254x152 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 687.5 mm and a flange width (b) of 254.5 mm, supported by a 13.2 mm thick web and 21 mm thick flanges. With a cross-sectional area of 19410 mm² and a linear mass of 152 kg/m, the UB 686x254x152 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 1518100000 mm⁴ governs major deflection and serviceability limits. To calculate the ultimate bending resistance, engineers may utilize the strong-axis plastic section modulus of 5046000 mm³. For lateral stability and column buckling verifications, the weak-axis moment of inertia (Iz) provides 57860000 mm⁴ of lateral stiffness.

Advanced analysis: For complex load cases, the UB 686x254x152 provides a y-axis shear area (at strong bending axis) of 10689 mm² for web shear verification and a torsion constant of 2312000 mm⁴ for calculating rotational twist under eccentric loading. Additionally, a warping constant of 6407000000000 mm⁶ is available for rigorous lateral-torsional buckling (LTB) checks.