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RHS 120x80/8

Production class: cold formed (EN 10219-2)

Section geometry

RHS shape
Height (h):
120mm
Width (b):
80mm
Wall thickness (t):
8mm
Outer rounding (router):
20mm
Inner rounding (rinner):
12mm

Section properties

Moment of inertia (I):mm⁴
Y-axis:
4.758E6
Z-axis:
2.517E6
Elastic section modulus (Wel):mm³
Y-axis:
79310
Z-axis:
62920
Plastic section modulus (Wpl):mm³
Y-axis:
1.020E5
Z-axis:
76930
Radius of gyration (i):mm
Y-axis:
41.79
Z-axis:
30.4
Plastic shear area (Av):mm²
Y-axis:
1090
Z-axis:
1635
Weight per meter:
21.39kg/m
Area (A):
2724mm²
Surface area per meter:
0.3657m²/m
Torsion constant (It):
5.840E6mm⁴

Profile overview for RHS 120x80/8

The RHS 120x80/8 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 120 mm, a width of 80 mm, and a uniform wall thickness of 8 mm. With a cross-sectional area of 2724.247719 mm² and a linear mass of 21.3853446 kg/m, the RHS 120x80/8 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 4758000 mm⁴ governs major deflection and serviceability limits. To calculate the ultimate bending resistance, engineers may utilize the strong-axis plastic section modulus of 102000 mm³. For lateral stability and column buckling verifications, the weak-axis moment of inertia (Iz) provides 2517000 mm⁴ of lateral stiffness.

Advanced analysis: For complex load cases, the RHS 120x80/8 provides a y-axis shear area (at strong bending axis) of 1089.699088 mm² for web shear verification and a torsion constant of 5840000 mm⁴ for calculating rotational twist under eccentric loading.