Back to All Sections

RHS 120x80/3

Production class: cold formed (EN 10219-2)

Section geometry

RHS shape
Height (h):
120mm
Width (b):
80mm
Wall thickness (t):
3mm
Outer rounding (router):
6mm
Inner rounding (rinner):
3mm

Section properties

Moment of inertia (I):mm⁴
Y-axis:
2.302E6
Z-axis:
1.234E6
Elastic section modulus (Wel):mm³
Y-axis:
38370
Z-axis:
30860
Plastic section modulus (Wpl):mm³
Y-axis:
46200
Z-axis:
35020
Radius of gyration (i):mm
Y-axis:
44.92
Z-axis:
32.89
Plastic shear area (Av):mm²
Y-axis:
456.3
Z-axis:
684.5
Weight per meter:
8.955kg/m
Area (A):
1141mm²
Surface area per meter:
0.3897m²/m
Torsion constant (It):
2.555E6mm⁴

Profile overview for RHS 120x80/3

The RHS 120x80/3 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 120 mm, a width of 80 mm, and a uniform wall thickness of 3 mm. With a cross-sectional area of 1140.823002 mm² and a linear mass of 8.955460563 kg/m, the RHS 120x80/3 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 2302000 mm⁴ governs major deflection and serviceability limits. To calculate the ultimate bending resistance, engineers may utilize the strong-axis plastic section modulus of 46200 mm³. For lateral stability and column buckling verifications, the weak-axis moment of inertia (Iz) provides 1234000 mm⁴ of lateral stiffness.

Advanced analysis: For complex load cases, the RHS 120x80/3 provides a y-axis shear area (at strong bending axis) of 456.3292007 mm² for web shear verification and a torsion constant of 2555000 mm⁴ for calculating rotational twist under eccentric loading.