Section R. 408.7091 - Guide railsRule 91.
(1) A car and counterweight shall be provided with guide rails of steel.(2) A guide rail shall be securely fastened with through bolts or clips of strength, design, and spacing as follows: (a) A guide rail and its fastenings shall not deflect more than 1/4 inch under normal operations.(b) A guide rail and its fastenings shall withstand the application of the safety when stopping the car with a rated load or when stopping the counterweights.(c) A guide rail shall rest on supports and extend at the top of the hoistway to prevent the guide shoes from running off the guide rail if the car or the counterweight travels beyond the terminal landings.Mich. Admin. Code R. 408.7091