Handling and marshalling cars containing explosives and cars placarded "Dangerous" and "Poison Gas" in trains.

General instructions

Cars containing "Explosives—Class A", "Poison Gases or Liquids—Class A" and tank cars requiring "Dangerous" Placards, must be handled in train. Such cars may be transported in mixed trains but only at such times between such points where there is no regular freight train service.

Cars placarded "Explosives", "Dangerous" or "Poison Gas" must have air and hand brakes in service.

Train and engine crews must be advised in writing of the presence and location in train of cars placarded "Explosives". At intermediate points, where crews change off or are relieved, this information must be transferred from crew to crew.

Cars placarded "Explosives" must not be placed in train next to: Engine, Occupied passenger combination car or caboose except when occupied by gas handlers or military personnel 'accompanying shipments, Car placarded "Dangerous" or "Poison Gas", Wooden underframe car loaded flat car, Open top car when lading extends above or beyond ends or sides Car equipped with automatic refrigeration of gas burning type. car containing lighted heaters stoves or lanterns, car loaded with live animals or fowl occupied by an attendant.

A placarded loaded tank car must not be placed in train next to: Engine (except when train consists only of placarded loaded tank cars); Occupied passenger or combination car other than car occupied by gas handlers accompanying shipment; Occupied caboose. (except when train consists only of placarded loaded tank cars); Car placarded "Explosives" or "Poison Gas"; Wooden underframe car; Car equipped with automatic refrigeration, of gas burning type; Car containing lighted heaters, stoves or lanterns: Car loaded with live animals or fowl occupied by an attendant.

A car containing Radio-active Material and placarded "Dangerous—Class D poison" must not e placed in train next to cars placarded explosives or next to carload shipments of undeveloped film.

In the event of breakage of container, wreck, fire or unusual delay involving a shipment of radio-active material in cars placarded "Dangerous—Class D Poison", the car and any loose radio-active material must be isolated as far as possible from danger of human contact and no persons must be allowed to remain dose to car or contents needlessly, until qualified persons are available to supervise handling. The Board, shipper and the Bureau of Explosives must be notified immediately.

Cars, buildings, areas, or equipment in which Class D Poisons have been spilled must not be placed in service or occupied until decontaminated by qualified persons.

In the event of accident involving a car containing radio-active material placarded "Dangerous—Class D Poison", the instructions contained in the Board's Circular No. 269 should be observed.

In the event of derailment or accident involving a car placarded "Explosives" or "Dangerous", instructions as contained in Bureau of Explosives Pamphlet No. 22 should be observed.

In a freight train, or mixed train,' car placarded "Explosives" shall, when length of train permits, be placed not nearer than the sixteenth car from both the engine, occupied passenger car or caboose, and when length of train will not permit, it shall be placed near the middle of the train. When helper power is cut in, it must be separated from the helper by at least six cars; when a freight train is marshalled in "Blocks" or classification, such car shall be P~ near the middle of the "Block" in which moving, but not nearer than the sixth car from both the engine or occupied caboose; on local freight or mixed trains, performing pickup and/or set off service, it shall be placed not nearer than the second car from both the engine, occupied passenger car or caboose.

Placarded loaded tank cars in freight trains or mixed trains shall, when the length of the train permits, be not nearer than the sixth car, from the engine or occupied caboose. When length of train will not permit, it shall be not nearer than the second car from the engine or occupied passenger car or caboose; this does not apply when train consists of loaded tank cars only.

Note.—Car placarded "Poison Gas", or a car placarded "Explosives" and "Poison Gas" shall at all times be next to and ahead of the car occupied by the gas handling crews when accompanying such cars.

A car placarded "Explosives" shall at all times be next to and ahead of the car occupied by Military Personnel when accompanying such cars.

Switching cars placarded "Explosives" or "Dangerous"

A car placarded "Explosives" or "Poison Gas" shall not be cutoff while in motion. No car moving under its own momentum shall be allowed to strike any car placarded "Explosives" or "Poison Gas". No freight car placarded "Explosives" or "Poison Gas" shall be coupled into with more force than is necessary to complete the coupling.

When transporting a car placarded "Explosives" in terminals, yards, side tracks, or sidings, such cars shall be separated from the engine by at least one non-placarded car.

Cars placarded "Explosives" shall be so placed that they will be safe from all probable danger of fire. Freight cars placarded "Explosives" shall not be placed under bridges or overhead highway crossing, nor in or alongside of passenger sheds or stations except for loading or unloading purposes.