Moment of Inertia Section Calculator Section Calculator – Rectangle Tube Section April 22, 2016April 22, 2016 admin Cross Section Area, Moment of inertia, Moment of Inertia Calculator, Radius of gyration, Rectangle Tube Section, Section Calculator, Section Modulus W T C L Rectangle HRectangle HSquare Square Pipe Circle SemiCircle Triangle Dimension Bo: Dimension Do: Dimension Bi: Dimension Di: Area is: Moment of Inertia is: Section Modulus is: Radius of Gyration is: Calculate Moment of Inertia for a Rectangle Tube section, find cross sectional area, section modulus and radius of gyration for a Rectangle Tube shape beam.