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RHS 400x300/12

Production class: cold formed (EN 10219-2)

Section geometry

RHS shape
Height (h):
400mm
Width (b):
300mm
Wall thickness (t):
12mm
Outer rounding (router):
36mm
Inner rounding (rinner):
24mm

Section properties

Moment of inertia (I):mm⁴
Y-axis:
3.528E8
Z-axis:
2.275E8
Elastic section modulus (Wel):mm³
Y-axis:
1.764E6
Z-axis:
1.516E6
Plastic section modulus (Wpl):mm³
Y-axis:
2.122E6
Z-axis:
1.747E6
Radius of gyration (i):mm
Y-axis:
150.4
Z-axis:
120.7
Plastic shear area (Av):mm²
Y-axis:
6688
Z-axis:
8918
Weight per meter:
122.5kg/m
Area (A):
15610mm²
Surface area per meter:
1.338m²/m
Torsion constant (It):
4.553E8mm⁴

Profile overview for RHS 400x300/12

The RHS 400x300/12 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 400 mm, a width of 300 mm, and a uniform wall thickness of 12 mm. With a cross-sectional area of 15605.94671 mm² and a linear mass of 122.5066817 kg/m, the RHS 400x300/12 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 352800000 mm⁴ governs major deflection and serviceability limits. To calculate the ultimate bending resistance, engineers may utilize the strong-axis plastic section modulus of 2122000 mm³. For lateral stability and column buckling verifications, the weak-axis moment of inertia (Iz) provides 227500000 mm⁴ of lateral stiffness.

Advanced analysis: For complex load cases, the RHS 400x300/12 provides a y-axis shear area (at strong bending axis) of 6688.262876 mm² for web shear verification and a torsion constant of 455300000 mm⁴ for calculating rotational twist under eccentric loading.