UPN 65

Production class: hot rolled (EN 10365)

Section geometry

Height (h):

65mm

Width (b):

42mm

Web thickness (t_w):

5.5mm

Flange thickness (t_f):

7.5mm

Radius (r):

7.5mm

Radius 2 (r₂):

4mm

Distance edge to centroid (y_s):

14.2mm

Distance shear center to centroid (y_m):

26mm

Distance end to measure point (u):

21mm

Flange slope:

Section properties

Moment of inertia (I):mm⁴

Y-axis:

5.750E5

Z-axis:

1.410E5

Elastic section modulus (W_el):mm³

Y-axis:

17700

Z-axis:

5070

Plastic section modulus (W_pl):mm³

Y-axis:

21700

Z-axis:

9380

Radius of gyration (i):mm

Y-axis:

25.2

Z-axis:

12.5

Plastic shear area (A_v):mm²

Y-axis:

630

Z-axis:

368

Weight per meter:

7.1kg/m

Area (A):

900mm²

Surface area per meter:

0.273m²/m

Torsion constant (I_t):

16100mm⁴

Warping constant (I_w):

8.000E7mm⁶

Profile overview for UPN 65

The UPN 65 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 65 mm and a flange width (b) of 42 mm, supported by a 5.5 mm thick web and 7.5 mm thick flanges. With a cross-sectional area of 900 mm² and a linear mass of 7.1 kg/m, the UPN 65 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 575000 mm⁴ governs major deflection and serviceability limits. To calculate the ultimate bending resistance, engineers may utilize the strong-axis plastic section modulus of 21700 mm³. For lateral stability and column buckling verifications, the weak-axis moment of inertia (I_z) provides 141000 mm⁴ of lateral stiffness.

Advanced analysis: For complex load cases, the UPN 65 provides a y-axis shear area (at strong bending axis) of 630 mm² for web shear verification and a torsion constant of 16100 mm⁴ for calculating rotational twist under eccentric loading. Additionally, a warping constant of 80000000 mm⁶ is available for rigorous lateral-torsional buckling (LTB) checks.