Warren Truss was used later on. There is a difference from the Pratt Truss, the material used to create exactly the Warren Truss is all metal because metals can resist well both tensile and compression strength.
Warren Truss is adopted later. Is different from the materials used to build Pratt Truss Warren Truss is a metal. Because metal can resist both tensile and compressive strength.
Warren Truss was later adopted are different from Pratt Truss direct construction materials Warren Truss usually metal, all because the metal can. Resistance well. Both tensile strength and compressive strength.