![]() The following table, lists the main formulas, discussed in this article, for the mechanical properties of the rectangular tube section (also called rectangular hollow section or RHS). The rectangular tube, however, typically, features considerably higher radius, since its section area is distributed at a distance from the centroid. Circle is the shape with minimum radius of gyration, compared to any other section with the same area A. Small radius indicates a more compact cross-section. Each bend should be checked for availability. It describes how far from centroid the area is distributed. STANDARD PIPE BENDS over-all dimensions are rvithin the limits of transportation facilities. The dimensions of radius of gyration are. Where I the moment of inertia of the cross-section around the same axis and A its area. ![]() Radius of gyration R_g of a cross-section, relative to an axis, is given by the formula: Notice, that the last formula is similar to the one for the plastic modulus Z_x, but with the height and width dimensions interchanged. The area A, the outer perimeter P_\textit
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