Builders use hollow rectangular beams in construction because such beams can withstand the forces of shearing and bending in both the x- and y-directions. They are also resistant to torsional forces, much more so than I-beams. To calculate strains on hollow square/rectangular beams, you must know the cross-sectional area and various moments of inertia in both the x- and y-directions.
February 9, 2013
5 - 10
2.1 and up
Warning – content has not yet been rated. Unrated apps may potentially contain content appropriate for mature audiences only.