UPN 80

Production class: hot rolled (EN 10365)

Section geometry

Height (h):

80mm

Width (b):

45mm

Web thickness (t_w):

6mm

Flange thickness (t_f):

8mm

Radius (r):

8mm

Radius 2 (r₂):

4mm

Distance edge to centroid (y_s):

14.5mm

Distance shear center to centroid (y_m):

26.7mm

Distance end to measure point (u):

22.5mm

Flange slope:

Section properties

Moment of inertia (I):mm⁴

Y-axis:

1.060E6

Z-axis:

1.940E5

Elastic section modulus (W_el):mm³

Y-axis:

26500

Z-axis:

6360

Plastic section modulus (W_pl):mm³

Y-axis:

32300

Z-axis:

11900

Radius of gyration (i):mm

Y-axis:

Z-axis:

13.3

Plastic shear area (A_v):mm²

Y-axis:

720

Z-axis:

490

Weight per meter:

8.6kg/m

Area (A):

1100mm²

Surface area per meter:

0.312m²/m

Torsion constant (I_t):

22000mm⁴

Warping constant (I_w):

1.800E8mm⁶

Profile overview for UPN 80

The UPN 80 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 80 mm and a flange width (b) of 45 mm, supported by a 6 mm thick web and 8 mm thick flanges. With a cross-sectional area of 1100 mm² and a linear mass of 8.6 kg/m, the UPN 80 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 1060000 mm⁴ governs major deflection and serviceability limits. To calculate the ultimate bending resistance, engineers may utilize the strong-axis plastic section modulus of 32300 mm³. For lateral stability and column buckling verifications, the weak-axis moment of inertia (I_z) provides 194000 mm⁴ of lateral stiffness.

Advanced analysis: For complex load cases, the UPN 80 provides a y-axis shear area (at strong bending axis) of 720 mm² for web shear verification and a torsion constant of 22000 mm⁴ for calculating rotational twist under eccentric loading. Additionally, a warping constant of 180000000 mm⁶ is available for rigorous lateral-torsional buckling (LTB) checks.