IPN 400

Production class: hot rolled (EN 10365)

Section geometry

Height (h):

400mm

Width (b):

155mm

Web thickness (t_w):

14.4mm

Flange thickness (t_f):

21.6mm

Radius (r):

14.4mm

Radius 2 (r₂):

8.6mm

Flange slope:

14%

Section properties

Moment of inertia (I):mm⁴

Y-axis:

2.921E8

Z-axis:

1.160E7

Elastic section modulus (W_el):mm³

Y-axis:

1.460E6

Z-axis:

1.490E5

Plastic section modulus (W_pl):mm³

Y-axis:

1.714E6

Z-axis:

2.530E5

Radius of gyration (i):mm

Y-axis:

157

Z-axis:

31.3

Plastic shear area (A_v):mm²

Y-axis:

6696

Z-axis:

6169

Weight per meter:

92.4kg/m

Area (A):

11770mm²

Surface area per meter:

1.33m²/m

Torsion constant (I_t):

1.700E6mm⁴

Warping constant (I_w):

4.200E11mm⁶

Profile overview for IPN 400

The IPN 400 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 400 mm and a flange width (b) of 155 mm, supported by a 14.4 mm thick web and 21.6 mm thick flanges. With a cross-sectional area of 11770 mm² and a linear mass of 92.4 kg/m, the IPN 400 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 292100000 mm⁴ governs major deflection and serviceability limits. To calculate the ultimate bending resistance, engineers may utilize the strong-axis plastic section modulus of 1714000 mm³. For lateral stability and column buckling verifications, the weak-axis moment of inertia (I_z) provides 11600000 mm⁴ of lateral stiffness.

Advanced analysis: For complex load cases, the IPN 400 provides a y-axis shear area (at strong bending axis) of 6696 mm² for web shear verification and a torsion constant of 1700000 mm⁴ for calculating rotational twist under eccentric loading. Additionally, a warping constant of 420000000000 mm⁶ is available for rigorous lateral-torsional buckling (LTB) checks.