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APPENDIX E
Excerpts From Code of Federal Regulations Title 49 - Transportation
Subpart D—Multiple Operated Electric Units
§ 230 400 Definitions.
All rules and Instructions contained in this subpart apply to electrically operated units designed to carry freight and/or passenger traffic operated by a single set of controls which are defined thus:
(a) Unit or units with propelling motors, control apparatus and one or more control stands.
(b) Unit or units with propelling motors and control apparatus but without control stands.
(c) Unit or units without propelling motors or control apparatus but with control stands.
§ 230.417 Trucks.
(a) Truck center plates shall fit properly and be securely fastened. The male center plate shall extend into the female center plate not less than 0.4 inch, except on motor trucks constructed to transmit tractive effort through center plate or center pin the male center plate shall extend into the female center plate not less than 1½ inches.
(b) Trucks shall be locked to the unit body and so arranged that the entire truck will lift with the unit body without disengaging the center plates The attachments shall be of adequate strength and properly maintained. Such provision shall be made on units presently in service and not so equipped when the unit receives general repairs but not later than 24 months after April 1, 1958.
Note: Relief from the requirements of this rule will be granted upon an adequate showing by an individual carrier.
(c) Truck bolsters shall be maintained approximately level.
(d) Trucks with any of the following defects shall not be continued in service: Loose column, pedestal, or journal-box bolt; cracked or broken frame, unless properly repaired; loose tie bar; broken or defective motor suspension lug, spring, bar, or bolt; broken or cracked center casting; cracked or broken equalizer, hanger, gib or pin.
(e) Suspension lugs or bars shall be of ample strength to keep motors secured and provision shall be made to prevent nose-supported motors from falling in case of failure of motor supports.
§ 230.457 Body structure.
(a) Units built new after April 1, 1956, and operated in trains having a total empty weight of 600,000 pounds or more shall have body structure designed to meet or exceed the following minimum specifications:
(1) The unit structure shall resist a minimum static end load of 800,000 pounds at the rear draft stops ahead of the bolster on the center line of draft, without developing any permanent deformation in any member of the unit structure.
(2) An anti-climbing arrangement shall be applied at each end, designed so that coupled units under full compression shall mate in a manner which will resist one unit from climbing the other. This arrangement shall resist a vertical load of 100,000 pounds without exceeding the yield point of its various parts or its attachments to the unit structure.
(3) The coupler carrier and its connections to the unit structure shall be designed to resist a vertical downward thrust from the coupler shank of 100,000 pounds for any horizontal position of the coupler, without exceeding the yield points of the materials used. When yielding type of coupler carrier is used an auxiliary arrangement shall be provided, designed in accordance with these requirements.
(4) The outside end of each unit shall be provided with two main vertical members, one at each side of the diaphragm opening. Each main member shall have an ultimate shear value of not less than 300,000 pounds at a point even with the top of the underframe member to which it is attached. The attachment of these members at bottom shall be sufficient to develop their full shear value. If reinforcement is used to provide the shear value such reinforcement shall have full value for a distance of 18 inches up from the underframe connection, then taper to a point approximately 30 inches above the underframe connection.
(5) Strength of locking means of truck to unit body shall be not less than the equivalent of an ultimate shear value of 250,000 pounds.
(b) Units built new after April 1, 1956, and operated in trains having a total empty weight of less than 600,000 pounds shall have body structure designed to meet or exceed the following minimum specifications:
(1) The unit structure shall resist a minimum static end load of 400,000 pounds at the rear draft stops ahead of the bolster on the center line of draft, without developing any permanent deformation in any member of the unit structure.
(2) An anti-climbing arrangement shall be applied at each end designed so that coupled units under full compression shall mate in a manner which will resist one unit from climbing the other. This arrangement shall resist a vertical load of 75,000 pounds without exceeding the yield point of its various parts or its attachments to the unit structure.
(3) The coupler carrier and its connections to the unit structure shall be designed to resist a vertical downward thrust from the coupled shank of 75,000 pounds for any horizontal position of the coupler, without exceeding the yield points of the materials used. When a yielding type of coupler carrier is used an auxiliary arrangement shall be provided, designed in accordance with these requirements.
(a) The outside end of each unit shall be provided with two main vertical members, one at each side of the diaphragm opening. Each main member shall have an ultimate shear value of not less than 200,000 pounds at a point even with the top of the underframe member to which it is attached. The attachments of these members at bottom shall be sufficient to develop their full shear value if reinforcement is used to provide the shear value such reinforcement shall have full value for a distance of 13 inches up from the underframe connection, then taper to a point approximately 30 inches above the underframe connection.
(5) Strength of locking means of truck to unit body shall be not less than the equivalent of an ultimate shear value of 250,000 pounds
