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RHS 80x40/3

Production class: cold formed (EN 10219-2)

Section geometry

RHS shape
Height (h):
80mm
Width (b):
40mm
Wall thickness (t):
3mm
Outer rounding (router):
6mm
Inner rounding (rinner):
3mm

Section properties

Moment of inertia (I):mm⁴
Y-axis:
5.225E5
Z-axis:
1.756E5
Elastic section modulus (Wel):mm³
Y-axis:
13060
Z-axis:
8778
Plastic section modulus (Wpl):mm³
Y-axis:
16540
Z-axis:
10160
Radius of gyration (i):mm
Y-axis:
28.12
Z-axis:
16.3
Plastic shear area (Av):mm²
Y-axis:
220.3
Z-axis:
440.5
Weight per meter:
5.187kg/m
Area (A):
660.8mm²
Surface area per meter:
0.2297m²/m
Torsion constant (It):
4.388E5mm⁴

Profile overview for RHS 80x40/3

The RHS 80x40/3 is a structural steel cross-section utilized in commercial construction, industrial framing, and mechanical engineering. Manufactured as a cold formed section, it complies with EN 10219-2 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 rectangular/square hollow section is defined by a depth of 80 mm, a width of 40 mm, and a uniform wall thickness of 3 mm. With a cross-sectional area of 660.8230016 mm² and a linear mass of 5.187460563 kg/m, the RHS 80x40/3 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 (Iy) of 522500 mm⁴ governs major deflection and serviceability limits. To calculate the ultimate bending resistance, engineers may utilize the strong-axis plastic section modulus of 16540 mm³. For lateral stability and column buckling verifications, the weak-axis moment of inertia (Iz) provides 175600 mm⁴ of lateral stiffness.

Advanced analysis: For complex load cases, the RHS 80x40/3 provides a y-axis shear area (at strong bending axis) of 220.2743339 mm² for web shear verification and a torsion constant of 438800 mm⁴ for calculating rotational twist under eccentric loading.