CHS 813/20

The CHS 813/20 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 circular hollow section features a nominal outer diameter of 813 mm and a uniform wall thickness of 20 mm. With a cross-sectional area of 49825.65949 mm² and a linear mass of 391.131427 kg/m, the CHS 813/20 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 (I_y) of 3919093301 mm⁴ governs major deflection and serviceability limits. To calculate the ultimate bending resistance, engineers may utilize the strong-axis plastic section modulus of 12579646.67 mm³. For lateral stability and column buckling verifications, the weak-axis moment of inertia (I_z) provides 3919093301 mm⁴ of lateral stiffness.

Advanced analysis: For complex load cases, the CHS 813/20 provides a y-axis shear area (at strong bending axis) of 31720 mm² for web shear verification and a torsion constant of 7838186601 mm⁴ for calculating rotational twist under eccentric loading.