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Area Moment of Inertia - Typical Cross Sections I - Typical cross sections and their Area Moment of Inertia.Beams and Columns - Deflection and stress, moment of inertia, section modulus and technical information of beams and columns.Mechanics - Forces, acceleration, displacement, vectors, motion, momentum, energy of objects and more.Radius of Gyration for a equilateral triangle can be calculated as R = ((H 2 + h 2) / 12) 1/2 (6) Equilateral Triangle with excentric axis Radius of Gyration for a hollow square with tilted axis can be calculated as R = ((H 2 + h 2) / 12) 1/2 (5) Hollow Square - with tilted axis Radius of Gyration for a hollow square can be calculated as R = b h / (6 (b 2 + h 2)) 1/2 (3) Rectangle - with tilted axis II Radius of Gyration for a rectangle with tilted axis can be calculated as R = 0.577 h (2) Rectangle - with tilted axis Radius of Gyration for a rectangle with excentric axis can be calculated as

R max = max radius of gyration (strong axis moment of inertia) Radius of Gyration for a rectangle with axis in center can be calculated as )Ī = cross sectional area (m 2, mm 2, ft 2, in 2.) Some typical Sections and their Radius of Gyration Rectangle - with axis in center I = Area Moment Of Inertia (m 4, mm 4, ft 4, in 4. The structural engineering radius of gyration can be expressed as In structural engineering the Radius of Gyration is used to describe the distribution of cross sectional area in a column around its centroidal axis.