Reglamento General de Seguridad e Higiene Industrial, Cap. IV -- Ascensores de personas. No incluido en el índice bajo Ley 149 de 12 dic, 2005

Metals other than steel may be used in the construction of car frames and platforms provided the metal used has the essential properties to meet all requirements for the purpose in accordance with good engineering practice and providing the stresses and deflections conform to the requirements of Rules 203.10 and 203.11 respectively. Ibid