To enable students who are blind or visually impaired to discover how much load can be carried by index cards folded into various shapes, resembling columns
Columns of various shapes and sizes are part of bridges, overpasses and other structures. Students with a visual impairment can not easily observe whole columns of various shapes and sizes. Some columns are like cylinders, others are box shaped, and some are very wide others are narrow. The shape and size of the column depend on the load they are expected to carry, as the shape affects strength.