UB 406x140x39

Production class: hot rolled (EN 10365)

Section geometry

Height (h):

398mm

Width (b):

141.8mm

Web thickness (t_w):

6.4mm

Flange thickness (t_f):

8.6mm

Radius (r):

10mm

Section properties

Moment of inertia (I):mm⁴

Y-axis:

1.249E8

Z-axis:

4.097E6

Elastic section modulus (W_el):mm³

Y-axis:

6.279E5

Z-axis:

57790

Plastic section modulus (W_pl):mm³

Y-axis:

7.230E5

Z-axis:

90820

Radius of gyration (i):mm

Y-axis:

158

Z-axis:

Plastic shear area (A_v):mm²

Y-axis:

2439

Z-axis:

2750

Weight per meter:

39kg/m

Area (A):

4970mm²

Surface area per meter:

1.333m²/m

Torsion constant (I_t):

1.064E5mm⁴

Warping constant (I_w):

1.549E11mm⁶

Profile overview for UB 406x140x39

The UB 406x140x39 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 398 mm and a flange width (b) of 141.8 mm, supported by a 6.4 mm thick web and 8.6 mm thick flanges. With a cross-sectional area of 4970 mm² and a linear mass of 39 kg/m, the UB 406x140x39 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 (I_y) of 124900000 mm⁴ governs major deflection and serviceability limits. To calculate the ultimate bending resistance, engineers may utilize the strong-axis plastic section modulus of 723000 mm³. For lateral stability and column buckling verifications, the weak-axis moment of inertia (I_z) provides 4097000 mm⁴ of lateral stiffness.

Advanced analysis: For complex load cases, the UB 406x140x39 provides a y-axis shear area (at strong bending axis) of 2438.96 mm² for web shear verification and a torsion constant of 106400 mm⁴ for calculating rotational twist under eccentric loading. Additionally, a warping constant of 154900000000 mm⁶ is available for rigorous lateral-torsional buckling (LTB) checks.