UB 1100x400x390

Production class: hot rolled (EN 10365)

Section geometry

Height (h):

1100mm

Width (b):

400mm

Web thickness (t_w):

20mm

Flange thickness (t_f):

36mm

Radius (r):

30mm

Section properties

Moment of inertia (I):mm⁴

Y-axis:

1.016E10

Z-axis:

3.849E8

Elastic section modulus (W_el):mm³

Y-axis:

1.847E7

Z-axis:

1.924E6

Plastic section modulus (W_pl):mm³

Y-axis:

2.099E7

Z-axis:

2.995E6

Radius of gyration (i):mm

Y-axis:

450

Z-axis:

Plastic shear area (A_v):mm²

Y-axis:

28800

Z-axis:

24210

Weight per meter:

390kg/m

Area (A):

49700mm²

Surface area per meter:

3.708m²/m

Torsion constant (I_t):

1.649E7mm⁴

Warping constant (I_w):

1.087E14mm⁶

Profile overview for UB 1100x400x390

The UB 1100x400x390 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 1100 mm and a flange width (b) of 400 mm, supported by a 20 mm thick web and 36 mm thick flanges. With a cross-sectional area of 49700 mm² and a linear mass of 390 kg/m, the UB 1100x400x390 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 10163600000 mm⁴ governs major deflection and serviceability limits. To calculate the ultimate bending resistance, engineers may utilize the strong-axis plastic section modulus of 20990000 mm³. For lateral stability and column buckling verifications, the weak-axis moment of inertia (I_z) provides 384900000 mm⁴ of lateral stiffness.

Advanced analysis: For complex load cases, the UB 1100x400x390 provides a y-axis shear area (at strong bending axis) of 28800 mm² for web shear verification and a torsion constant of 16490000 mm⁴ for calculating rotational twist under eccentric loading. Additionally, a warping constant of 108680000000000 mm⁶ is available for rigorous lateral-torsional buckling (LTB) checks.