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

The operating means shall conform to the following: 1. It shall be of the continuous-pressure type. 2. It shall operate the car at a speed not exceeding one hundred and fifty (150) feet per minute. 3. It shall operate the car only when the car door or gate is in the closed position and when all hoistway doors are in the closed position and, where required by this code, locked. 4. It may be of the portable type provided the extension cord is permanently attached to the car crosshead so that the device cannot be removed from the car top. 5. It shall be so arranged and connected that when operative, the movement of the car shall be solely under the control of this device, except as provided in subdivision 7 of this rule, and any power-door operating devices shall be inoperative. The means for accomplishing this function shall be located between the car crosshead and that side of the car which is nearest to the hoistway door used for access. 83 TEXTO EN ESPAÑOL f. El tornillo será de acero y las tuercas serán de bronce u otro material que tenga una elongación de por lo menos catorce (14) por ciento en un largo de dos (2) pulgadas. g. Se proveerá una cubierta vertical cerrada en el fondo para cubrir y proteger el tornillo debajo de la tuerca. Ibid