The role of Santa Maria Novella train station in these crimes is recognized by a striking memorial sculpture and steel plaque at platform 16. The sculpture consists of a length of railway track Farm structures - Ch3 Building materials:Concrete Building hardware. Nails. A nail relies on the grip around its shank and the shear strength of its cross-section to give strength to a joint. It is important to select the right type and size of nail for any particular situation. Nails are specified by their type, length and gauge (the higher the gauge number - the smaller the shank diameter).