(1) Only roller chain made of high quality alloy, heat treated steel with the following characteristics will be acceptable.
- (a) Prestressed
- (b) Shot Peened
- (c) In-Line Blanking
- (d) Deep Case Hardening of Pins and Bushings
- (2) Suspension means shall not be less than two separate roller chains; each chain having a minimum tensile strength of 3,500 pounds.
- (3) The factor of safety of the suspension means shall be not less than seven.
- (4) All chains shall have not less than six inches of chain available beyond the normal stopping point when the car has reached its extreme limits of travel.
- (5) All chain ends must be fastened by standard master links as supplied by chain manufacturer.
Authority: T.C.A. Title 68, Chapter 121. Administrative History: Amendment filed July 24, 2000; effective November 28, 2000.