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RHS 80x40/4

Production class: cold formed (EN 10219-2)

Section geometry

RHS shape
Height (h):
80mm
Width (b):
40mm
Wall thickness (t):
4mm
Outer rounding (router):
8mm
Inner rounding (rinner):
4mm

Section properties

Moment of inertia (I):mm⁴
Y-axis:
6.479E5
Z-axis:
2.149E5
Elastic section modulus (Wel):mm³
Y-axis:
16200
Z-axis:
10740
Plastic section modulus (Wpl):mm³
Y-axis:
20910
Z-axis:
12770
Radius of gyration (i):mm
Y-axis:
27.53
Z-axis:
15.86
Plastic shear area (Av):mm²
Y-axis:
284.9
Z-axis:
569.9
Weight per meter:
6.71kg/m
Area (A):
854.8mm²
Surface area per meter:
0.2263m²/m
Torsion constant (It):
5.524E5mm⁴

Profile overview for RHS 80x40/4

The RHS 80x40/4 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 4 mm. With a cross-sectional area of 854.7964474 mm² and a linear mass of 6.710152112 kg/m, the RHS 80x40/4 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 647900 mm⁴ governs major deflection and serviceability limits. To calculate the ultimate bending resistance, engineers may utilize the strong-axis plastic section modulus of 20910 mm³. For lateral stability and column buckling verifications, the weak-axis moment of inertia (Iz) provides 214900 mm⁴ of lateral stiffness.

Advanced analysis: For complex load cases, the RHS 80x40/4 provides a y-axis shear area (at strong bending axis) of 284.9321491 mm² for web shear verification and a torsion constant of 552400 mm⁴ for calculating rotational twist under eccentric loading.