Construction methods are... variable for each specific material. - Eduardo Torroja

Before a man can successfully plan a structure... he must study, from every possible angle, the ultimate purpose of his building. Attention must be directed to the basic structural concept before the mathematical process of calculation is undertaken.

[E]very structure has a resistant function to fulfill... to ensure ...the static equilibrium of the structure for a long period of time.

Mathematics is merely a convenient tool by which the designer determines the physical proportions and details of a planned structure in order to transform his ideas... to the actuality of a finished structure.