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RHS 80x40/5

Production class: hot finished (EN 10210-2)

Section geometry

RHS shape
Height (h):
80mm
Width (b):
40mm
Wall thickness (t):
5mm
Outer rounding (router):
7.5mm
Inner rounding (rinner):
5mm

Section properties

Moment of inertia (I):mm⁴
Y-axis:
8.028E5
Z-axis:
2.570E5
Elastic section modulus (Wel):mm³
Y-axis:
20070
Z-axis:
12850
Plastic section modulus (Wpl):mm³
Y-axis:
26130
Z-axis:
15660
Radius of gyration (i):mm
Y-axis:
27.35
Z-axis:
15.48
Plastic shear area (Av):mm²
Y-axis:
357.7
Z-axis:
715.4
Weight per meter:
8.424kg/m
Area (A):
1073mm²
Surface area per meter:
0.2271m²/m
Torsion constant (It):
6.505E5mm⁴

Profile overview for RHS 80x40/5

The RHS 80x40/5 is a structural steel cross-section utilized in commercial construction, industrial framing, and mechanical engineering. Manufactured as a hot finished section, it complies with EN 10210-2 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 5 mm. With a cross-sectional area of 1073.17477 mm² and a linear mass of 8.424421948 kg/m, the RHS 80x40/5 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 802800 mm⁴ governs major deflection and serviceability limits. To calculate the ultimate bending resistance, engineers may utilize the strong-axis plastic section modulus of 26130 mm³. For lateral stability and column buckling verifications, the weak-axis moment of inertia (Iz) provides 257000 mm⁴ of lateral stiffness.

Advanced analysis: For complex load cases, the RHS 80x40/5 provides a y-axis shear area (at strong bending axis) of 357.7249235 mm² for web shear verification and a torsion constant of 650500 mm⁴ for calculating rotational twist under eccentric loading.