pt. 174 49 cfr ch. i (10–1–98 edition)legismex.mty.itesm.mx/secc_inter/49cfr/49cfrpart174.pdf584...

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49 CFR Ch. I (10–1–98 Edition)Pt. 174

volatile constituents, the sample must re-ceive only the minimum treatment nec-essary to ensure its homogeneity. After re-moving each test portion, the sample con-tainer must be immediately closed tightly toensure that no volatile components escapefrom the container; if this closure is incom-plete, an entirely new sample must be taken.

5. PROCEDURE

Carry out the determination in triplicate.WARNING—Do not carry out the test in a

small confined area (for example a glove box)because of the hazard of explosions.

(a) It is essential that the apparatus be setup in a completely draft-free area (see warn-ing) and in the absence of strong light to fa-cilitate observation of flash, flame, etc.

(b) Place the metal block on the hotplateor heat the metal block by other suitablemeans so that its temperature, as indicatedby the thermometer placed in the metalblock, is maintained at the specified tem-perature within a tolerance of ±1 °C. For theappropriate test temperature, see paragraph5.(h) of this appendix. Correct this tempera-ture for the difference in barometric pressurefrom the standard atmospheric pressure(101.3 kPa) by raising the test temperaturefor a higher pressure or lowering the testtemperature for a lower pressure by 1.0 °C foreach 4 kPa difference. Ensure that the top ofthe metal block is exactly horizontal. Usethe gauge to check that the jet is 2.2 mmabove the top of the well when in the test po-sition.

(c) Light the butane test fuel with the jetaway from the test position (i.e. in the ‘‘off’’position, away from the well). Adjust thesize of the flame so that it is 8 mm to 9 mmhigh and approximately 5 mm wide.

(d) Using the syringe, take from the sam-ple container at least 2 ml of the sample andrapidly transfer a test portion of 2 ml ±0.1 mlto the well of the combustibility tester andimmediately start the timing device.

(e) After a heating time of 60 seconds (s),by which time the test portion is deemed tohave reached its equilibrium temperature,and if the test fluid has not ignited, swingthe test flame into the test position over theedge of the pool of liquid. Maintain it in thisposition for 15 s and then return it to the‘‘off’’ position while observing the behaviorof the test portion. The test flame must re-main lighted throughout the test.

(f) For each test observe and record:(i) whether there is ignition and sustained

combustion or flashing, or neither, of thetest portion before the test flame is movedinto the test position;

(ii) whether the test portion ignites whilethe test flame is in the test position, and, ifso, how long combustion is sustained afterthe test flame is returned to the ‘‘off’’ posi-tion.

(g) If sustained combustion interpreted inaccordance with paragraph 6. of this appen-dix is not found, repeat the complete proce-dure with new test portions, but with a heat-ing time of 30 s.

(h) If sustained combustion interpreted inaccordance with paragraph 6. of this appen-dix is not found at a test temperature of 60.5°C (141 °F), repeat the complete procedurewith new test portions, but at a test tem-perature of 75 °C (167 °F). In the case of a ma-terial which has a flash point above 60.5 °C(141 °F) and below 93 °C (200 °F), if sustainedcombustion interpreted in accordance withparagraph 6. of this appendix is not found ata test temperature of 5 °C (9 °F) above itsflash point, repeat the complete procedurewith new test portions, but at a test tem-perature of 20 °C (36 °F) above its flash point.

6. INTERPRETATION OF OBSERVATIONS

The material must be assessed either asnot sustaining combustion or as sustainingcombustion. Sustained combustion must bereported at either of the heating times if oneof the following occurs with either of thetest portions:

(a) When the test flame is in the ‘‘off’’ posi-tion, the test portion ignites and sustainscombustion;

(b) The test portion ignites while the testflame is in the test position for 15 s, and sus-tains combustion for more than 15 s after thetest flame has been returned to the ‘‘off’’ po-sition.

NOTE TO PARAGRAPH 6 OF THIS APPENDIX:Intermittent flashing may not be interpretedas sustained combustion. Normally, at theend of 15 s, the combustion has either clearlyceased or continues. In cases of doubt, thematerial must be deemed to sustain combus-tion.

[Amdt. 173–241, 59 FR 67517, Dec. 29, 1994, asamended by Amdt. 173–255, 61 FR 50627, Sept.26, 1996]

PART 174—CARRIAGE BY RAIL

Subpart A—General Requirements

Sec.174.1 Purpose and scope.174.3 Unacceptable hazardous materials

shipments.174.5 Carrier’s materials and supplies.174.9 Inspection and acceptance.174.14 Movements to be expedited.174.16 Removal and disposition of hazardous

materials at destination.174.20 Local or carrier restrictions.

Subpart B—General OperatingRequirements

174.24 Shipping papers.

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Research and Special Programs Administration, DOT § 174.3

174.26 Notice to train crews of placardedcars.

174.50 Nonconforming or leaking packages.

Subpart C—General Handling and LoadingRequirements

174.55 General requirements.174.57 Cleaning cars.174.59 Marking and placarding of rail cars.174.61 Transport vehicles and freight con-

tainers on flat cars.174.63 Portable tanks, IM portable tanks,

intermediate bulk containers, cargotanks, and multi-unit tank car tanks.

174.67 Tank car unloading.174.81 Segregation of hazardous materials.

Subpart D—Handling of Placarded RailCars, Transport Vehicles and FreightContainers

174.82 General requirements for the han-dling of placarded rail cars, transport ve-hicles, freight containers, and bulk pack-ages.

174.83 Switching placarded rail cars, trans-port vehicles, freight containers, andbulk packagings.

174.84 Position in train of loaded placardedrail cars, transport vehicles, freight con-tainers or bulk packagings when accom-panied by guards or technical escorts.

174.85 Position in train of placarded cars,transport vehicles, freight containers,and bulk packagings.

174.86 Maximum allowable operating speed.

Subpart E—Class I (Explosive) Materials

174.101 Loading Class 1 (explosive) mate-rials.

174.102 Forbidden mixed loading and stor-age.

174.103 Disposition of damaged or astrayshipments.

174.104 Division 1.1 or 1.2 (Class A explosive)materials; car selection, preparation, in-spection, and certification.

174.105 Routing shipments, Division 1.1 or1.2 (Class A explosive) materials.

174.106 ‘‘Order-Notify’’ or ‘‘C.O.D.’’ ship-ments, Division 1.1 or 1.2 (Class A explo-sive) materials.

174.110 Car magazine.174.112 Loading Division 1.3 (Class B explo-

sive) materials and Division 1.2 (devicescorresponding to Class B explosive) ma-terials (Also see § 174.101).

174.114 Record to be made of change of sealson ‘‘Cars loaded with Division 1.1 or 1.2(explosive) materials’’.

174.115 Loading Division 1.4 (Class C explo-sive) materials.

Subpart F—Detailed Requirements for Class2 (Gases) Materials

174.200 Special handling requirements.174.201 Class 2 (gases) material cylinders.174.204 Tank car delivery of gases, including

cryogenic liquids.174.290 Materials extremely poisonous by

inhalation shipped by, for, or to the De-partment of Defense.

Subpart G—Detailed Requirements forClass 3 (Flammable Liquid) Materials

174.300 Special handling requirements.174.304 Class 3 (flammable liquid) materials

in tank cars.

Subparts H–I [Reserved]

Subpart J—Detailed Requirements forDivision 6.1 (Poisonous) Materials

174.600 Special handling requirements formaterials extremely poisonous by inha-lation.

174.615 Cleaning cars.174.680 Division 6.1 (poisonous) materials

with foodstuffs.

Subpart K—Detailed Requirements forClass 7 (Radioactive) Materials

174.700 Special handling requirements forClass 7 (radioactive) materials.

174.715 Cleanliness of transport vehiclesafter use.

174.750 Incidents involving leakage.

AUTHORITY: 49 U.S.C. 5101–5127; 49 CFR 1.53.

Subpart A—General Requirements

§ 174.1 Purpose and scope.This part prescribes requirements in

addition to those contained in parts171, 172, 173, and 179 of this subchapter,to be observed with respect to thetransportation of hazardous materialsin or on rail cars.

[Amdt. 174–26, 41 FR 16092, Apr. 15, 1976, asamended by Amdt. 174–26A, 41 FR 40685, Sept.20, 1976; Amdt. 174–74, 58 FR 51533, Oct. 1,1993]

§ 174.3 Unacceptable hazardous mate-rials shipments.

No person may accept for transpor-tation or transport by rail any ship-ment of hazardous material that is notin conformance with the requirementsof this subchapter.

[Amdt. 174–83, 61 FR 28677, June 5, 1996]


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49 CFR Ch. I (10–1–98 Edition)§ 174.5

§ 174.5 Carrier’s materials and sup-plies.

This subchapter applies to the trans-portation of a carrier’s materials andsupplies moving by rail, except thatthe shipper’s certification is not re-quired when these materials and sup-plies are being transported by the car-rier who owns them. The requirementsof this subchapter do not apply to rail-way torpedoes or fusees when carriedin engines or rail cars. Railway tor-pedoes must be in closed metal boxeswhen not in use.

[Amdt. 174–26B, 41 FR 57071, Dec. 30, 1976]

§ 174.9 Inspection and acceptance.At each location where a hazardous

material is accepted for transportationor placed in a train, the carrier shallinspect each rail car containing thehazardous material, at ground level,for required markings, labels, placards,securement of closures and leakage.This inspection may be performed inconjunction with inspections requiredunder parts 215 and 232 of this title.

[Amdt. 174–83, 61 FR 28677, June 5, 1996]

§ 174.14 Movements to be expedited.(a) A carrier must forward each ship-

ment of hazardous materials promptlyand within 48 hours (Saturdays, Sun-days, and holidays excluded), after ac-ceptance at the originating point or re-ceipt at any yard, transfer station, orinterchange point, except that wherebiweekly or weekly service only is per-formed, a shipment of hazardous mate-rials must be forwarded on the firstavailable train.

(b) A tank car loaded with any Divi-sion 2.1 (flammable gas), Division 2.3(poisonous gas) or Class 3 (flammableliquid) material, may not be receivedand held at any point, subject to for-warding orders, so as to defeat the pur-pose of this section or of § 174.204 of thissubchapter.

[Amdt. 174–26, 41 FR 16092, Apr. 15, 1976, asamended by Amdt. 174–68, 55 FR 52677, Dec.21, 1990]

§ 174.16 Removal and disposition ofhazardous materials at destination.

(a) Delivery at non-agency stations. Ashipment of Class 1 (explosive) mate-rials may not be unloaded at non-agen-

cy stations unless the consignee isthere to receive it or unless properlylocked and secure storage facilities areprovided at that point for its protec-tion. If delivery cannot be so made, theshipment must be taken to next ornearest agency station for delivery.

(b) Delivery at agency stations. A car-rier shall require the consignee of eachshipment of hazardous materials to re-move the shipment from carrier’s prop-erty within 48 hours (exclusive of Sat-urdays, Sundays, and holidays) afternotice of arrival has been sent or given.If not so removed, the carrier shall im-mediately dispose of the shipments asfollows:

(1) Division 1.1 or 1.2 (Class A explosive)materials: If safe storage is available, bystorage at the owner’s expense; if safestorage is not available, by return tothe shipper, sale, or destruction undersupervision of a competent person; or ifsafety requires, by destruction undersupervision of a competent person.

(2) Hazardous materials, except Division1.1 or 1.2 (Class A explosive) materials, incarload shipments: By storage on thecarrier’s property; by storage on otherthan the carrier’s property, if safe stor-age on the carrier’s property is notavailable; or by sale at expiration of 15calendar days after notice of arrivalhas been sent or given to the con-signee, provided the consignor has beennotified of the non-delivery at the expi-ration of a 48-hour period and ordersfor disposition have not been received.

(3) Hazardous materials, except Division1.1 or 1.2 (Class A explosive) materials, inless-than-carload shipments: By returnto the shipper if notice of non-deliverywas requested and given the consignoras prescribed by the carrier’s tariff,and orders for return to shipper havebeen received; by storage on the car-rier’s property; by storage on otherthan the carrier’s property, if safe stor-age on carrier’s property is not avail-able; or by sale at expiration of 15 cal-endar days after notice of arrival hasbeen sent or given to the consignee,provided the consignor has been noti-fied of non-delivery at expiration of a48–hour period and orders for disposi-tion have not been received.



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§ 174.20 Local or carrier restrictions.

(a) When local conditions make theacceptance, transportation, or deliveryof hazardous materials unusually haz-ardous, local restrictions may be im-posed by the carrier.

(b) Each carrier must report to theBureau of Explosives for publicationthe full information as to any restric-tions which it imposes against the ac-ceptance, delivery, or transportation ofhazardous materials, over any portionof its lines under this section.

[Amdt. 174–26, 41 FR 16092, Apr. 15, 1976]

Subpart B—General OperatingRequirements

§ 174.24 Shipping papers.

A person may not accept or transporta hazardous material by rail unlessthat person receives a shipping paperthat properly conveys the informationrequired by part 172 of this subchapter.Only an initial carrier within theUnited States must receive and retaina copy of the shipper’s certification asrequired by § 172.204 of this subchapter.This section does not apply to a mate-rial that is excepted from shippingpaper requirements as specified in§ 172.200 of this subchapter.

[Amdt. 174–83, 61 FR 28677, June 5, 1996, asamended by Amdt. 174–83, 61 FR 50255, Sept.25, 1996]

§ 174.26 Notice to train crews of plac-arded cars.

(a) The train crew must have a docu-ment that reflects the current positionin the train of each rail car containinga hazardous material. The train crewmust update the document to indicatechanges in the placement of a rail carwithin the train. For example, thetrain crew may update the documentby handwriting on it or by appendingor attaching another document to it.

(b) A member of the crew of a traintransporting a hazardous materialmust have a copy of a document for thehazardous material being transportedshowing the information required bypart 172 of this subchapter.

[Amdt. 174–84, 62 FR 1236, Jan. 8, 1997]

§ 174.50 Nonconforming or leakingpackages.

Leaking packages other than tankcars may not be forwarded until re-paired, reconditioned, or overpacked inaccordance with § 173.3 of this sub-chapter. Except as otherwise providedin this section, a tank car that nolonger conforms to this subchaptermay not be forwarded unless repairedor approved for movement by the Asso-ciate Administrator for Safety, FederalRailroad Administration. Notificationand approval must be furnished in writ-ing, or through telephonic or electronicmeans with subsequent written con-firmation provided within two weeks.For the applicable address and tele-phone number, see part 107, subpart B,appendix A, of this chapter. A leakingtank car containing a hazardous mate-rial may be moved without repair orapproval only so far as necessary to re-duce or eliminate an immediate threatof harm to human health or the envi-ronment when it is determined itsmovement would provide greater safetythan allowing the car to remain inplace. In the case of a liquid leak,measures must be taken to prevent thespread of the liquid.

[Amdt. 174–83, 61 FR 28677, June 5, 1996]

Subpart C—General Handling andLoading Requirements

§ 174.55 General requirements.

(a) Each package containing a haz-ardous material being transported byrail in a freight container or transportvehicle must be loaded so that it can-not fall or slide and must be safe-guarded in such a manner that otherfreight cannot fall onto or slide into itunder conditions normally incident totransportation. When this protectioncannot be provided by using otherfreight, it must be provided by block-ing and bracing. For examples of block-ing and bracing in freight containersand transport vehicles, see Bureau ofExplosives Pamphlet Nos. 6 and 6C.

(b) Each package containing a haz-ardous material bearing package ori-entation markings prescribed in§ 172.312 of this subchapter must beloaded within a transport vehicle or


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49 CFR Ch. I (10–1–98 Edition)§ 174.57

freight container to remain in the cor-rect position indicated by those mark-ings during transportation.

(c) The doors of a freight container ortransport vehicle may not be used tosecure a load that includes a packagecontaining a hazardous material unlessthe doors meet the design strength re-quirements of Specification M–930 (forfreight containers) and M–931 (for trail-ers) in the AAR’s Manual of Standardsand Recommended Practices and theload is also within the limits of the de-sign strength requirements for thedoors.

[Amdt. 174–83, 61 FR 28677, June 5, 1996]

§ 174.57 Cleaning cars.All hazardous material which has

leaked from a package in any rail caror on other railroad property must becarefully removed.

§ 174.59 Marking and placarding ofrail cars.

No person may transport a rail carcarrying hazardous materials unless itis marked and placarded as required bythis subchapter. Placards and car cer-tificates lost in transit must be re-placed at the next inspection point,and those not required must be re-moved at the next terminal where thetrain is classified. For Canadian ship-ments, required placards lost in tran-sit, must be replaced either by thoserequired by part 172 of this subchapteror by those authorized under § 171.12a.

[Amdt. 174–26, 41 FR 16092, Apr. 15, 1976, asamended by Amdt. 174–48, 50 FR 41521, Oct.11, 1985]

§ 174.61 Transport vehicles and freightcontainers on flat cars.

(a) A transport vehicle, freight con-tainer, or package containing a hazard-ous material must be designed andloaded so that it will not become dam-aged to an extent that would affect itsintegrity under conditions normally in-cident to transportation. Each unitmust be secured on a flatcar so that itcannot permanently change positionduring transit. Packages of hazardousmaterials contained therein must beloaded and braced as provided by§§ 174.101, 174.112, 174.115 and 174.55.Placards must be applied when pre-

scribed by part 172 of this subchapterand part 174.

(b) Except as specified in § 173.21, atruck body, trailer, or freight con-tainer equipped with heating or refrig-erating equipment which has fuel orany article classed as a hazardous ma-terial may be loaded and transportedon a flat car as part of a joint rail high-way movement. The heating or refrig-erating equipment is considered to be apart of the truck body or trailer and isnot subject to any other requirementsof this subchapter. The truck body,trailer, or freight container must be se-cured on the flatcar so that it cannotchange position during transit.

[Amdt. 174–26, 41 FR 16092, Apr. 15, 1976, asamended by Amdt. 174–26A, 41 FR 40685, Sept.20, 1976; Amdt. 174–38, 45 FR 32698, May 19,1980; Amdt. 174–39, 45 FR 81572, Dec. 11, 1980;Amdt. 174–59, 51 FR 5974, Feb. 18, 1986; Amdt.174–68, 57 FR 45464, Oct. 1, 1992; Amdt. 174–79,59 FR 64744, Dec. 15, 1994]

§ 174.63 Portable tanks, IM portabletanks, intermediate bulk contain-ers, cargo tanks, and multi-unittank car tanks.

(a) A carrier may not transport abulk packaging (e.g., portable tank, IMportable tank, intermediate bulk con-tainer, cargo tank, or multi-unit tankcar tank) containing a hazardous mate-rial in container-on-flatcar (COFC) ortrailer-on-flatcar (TOFC) service ex-cept as authorized by this section orunless approved for transportation bythe Associate Administrator for Safe-ty, FRA.

(b) A bulk packaging containing ahazardous material (including IM 101and IM 102 when appropriate accordingto dimensions and weight distribution)may be transported inside a fullyclosed transport vehicle or fully closedfreight container provided it is prop-erly secured with a restraint systemthat will prevent it from changing po-sition, sliding into other packages, orcontacting the side or end walls (in-cluding doors) under conditions nor-mally incident to transportation.

(c) When not transported in conform-ance with and subject to paragraph (b)of this section, a bulk packaging maybe transported in COFC service orTOFC service subject to the followingconditions as applicable:


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(1) The bulk packaging contains amaterial packaged in accordance with§ 173.240, 173.241, 173.242, or 173.243 ofthis subchapter;

(2) The tank and flatcar conform torequirements in AAR 600 of the AARSpecifications for Tank Cars, Speci-fication M–1002, entitled ‘‘Specifica-tions for Acceptability of Tank Con-tainers’’;

(3) For TOFC service, the trailerchassis conforms to requirements inparagraphs 3, 4, 5, and 6 of AAR Speci-fication M–943 ‘‘Container Chassis ForTOFC Service’’ of the AAR specifica-tion for ‘‘Specially Equipped FreightCar and Intermodal Equipment’’;

(4) For COFC service, the containersupport and securement systems con-form to requirements in SpecificationM–952 ‘‘Intermodal Container Supportand Securement Systems for FreightCars’’, of the AAR specification for‘‘Specially Equipped Freight Car andIntermodal Equipment’’;

(5) If transported in a well car—(i) The tank is not in a double-

stacked configuration (i.e., no freightcontainer or portable tank is placedabove or below the tank); and

(ii) The tank is transported in thewell with its outlet valve facing out-ward towards the end of the well andaway from any adjacent tank or con-tainer; and

(6) All securement fittings shall befully engaged and in the locked posi-tion, provided; however, if the tank istransported in a well car, it must beloaded into a well appropriate for thelength of the container and any voidfilling device present must be securedin its designed appropriate position.

(d) An approval in effect on February28, 1991 for the transportation of port-able tanks or IM portable tanks inTOFC or COFC service expires on thedate stated in the approval letter orJune 15, 1995, whichever is later.

(e) A carrier may not transport acargo tank or multi-unit tank car tankcontaining a hazardous material inTOFC or COFC service unless approvedfor such service by the Associate Ad-ministrator for Safety, FRA. However,in the event of an accident or incident,no such approval is necessary for thetransportation of a cargo tank contain-

ing a hazardous material in TOFC serv-ice under the following condition(s):

(1) There is an emergency need forthe cargo tank in order to mitigate theconsequences of an incident; and

(2) Movement of the cargo tank islimited to transportation necessary foremergency purposes.

[Amdt. 174–79, 59 FR 64744, Dec. 15, 1994]

§ 174.67 Tank car unloading.(a) In unloading tank cars, the fol-

lowing rules must be observed (see sub-part F of this part for gases):

(1) Unloading operations must be per-formed only by reliable persons prop-erly instructed in unloading hazardousmaterials and made responsible forcareful compliance with this part.

(2) Brakes must be set and wheelsblocked on all cars being unloaded.

(3) Caution signs must be so placedon the track or cars to give necessarywarning to persons approaching thecars from the open end of a siding andmust be left up until after the cars areunloaded and disconnected from thedischarge connection. The signs mustbe of metal or other comparable mate-rial, at least 30 cm (12 inches) high by38 cm (15 inches) wide in size, and bearthe words, ‘‘STOP—Tank Car Con-nected’’, or ‘‘STOP—Men at Work’’, theword ‘‘STOP’’ being in letters at least10 cm (3.9 inches) high and the otherwords in letters at least 5 cm (2 inches)high. The letters must be white on ablue background.

(4) Before a manhole cover or outletvalve cap is removed from a tank car,the car must be relieved of all interiorpressure by cooling the tank withwater or by venting the tank by raisingthe safety valve or opening the domevent at short intervals. However, ifventing to relieve pressure will cause adangerous amount of vapor to collectoutside the car, venting and unloadingmust be deferred until the pressure isreduced by allowing the car to standovernight or otherwise cooling the con-tents. These precautions are not nec-essary when the car is equipped with amanhole cover which hinges inward orwith an inner manhole cover whichdoes not have to be removed to unloadthe car, and when pressure is relievedby piping vapor into a condenser orstorage tank.


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49 CFR Ch. I (10–1–98 Edition)§ 174.67

(b) After the pressure is released, theseal must be broken and the manholecover removed as follows:

(1) Screw type. The cover must beloosened by placing a bar between themanhole cover lug and knob. After twocomplete turns, so that vent openingsare exposed, the operation must bestopped, and if there is any sound of es-caping vapor, the cover must bescrewed down tightly and the interiorpressure relieved as prescribed in para-graph (a)(4) of this section, beforeagain attempting to remove the cover.

(2) Hinged and bolted type. All nutsmust be unscrewed one complete turn,after which same precautions as pre-scribed for screw type cover must beobserved.

(3) Interior type. All dirt and cindersmust be carefully removed from aroundthe cover before the yoke is unscrewed.

(c) When the car is unloaded througha bottom outlet valve, the manholecover must be adjusted as follows:

(1) Screw type. The cover must be putin place, but not entirely screweddown, so that air may enter the tankthrough the vent holes in threadedflange of the cover.

(2) Hinged and bolted type. A non-me-tallic block must be placed under oneedge of the cover.

(3) Interior type. The screw must betightened up in the yoke so that thecover is brought up within one-halfinch of the closed position.

(d) When unloading through the bot-tom outlet of a car equipped with aninterior manhole type cover, and ineach case where unloading is donethrough the manhole (unless a specialcover with a safety vent opening and atight connection for the discharge out-let is used), the manhole must be pro-tected by asbestos or metal coversagainst the entrance of sparks or othersources of ignition of vapor, or bybeing covered and surrounded with wetburlap or similar cloth material. Theburlap or other cloth must be keptdamp by the replacement or the appli-cation of water as needed.

(e) Seals or other substances mustnot be thrown into the tank and thecontents may not be spilled over thecar or tank.

(f) The valve rod handle or control inthe dome must be operated several

times to see that outlet valve in bot-tom of tank is on its seat before valvecap is removed.

(g) The valve cap, or the reducerwhen a large outlet is to be used, mustbe removed with a suitable wrenchafter the set screws are loosened and apail must be placed in position to catchany liquid that may be in the outletchamber. If the valve cap or reducerdoes not unscrew easily, it may betapped lightly with a mallet or woodenblock in an upward direction. If leak-age shows upon starting the removal,the cap or reducer may not be entirelyunscrewed. Sufficient threads must beleft engaged and sufficient time al-lowed to permit controlled escape ofany accumulation of liquid in the out-let chamber. If the leakage stops or therate of leakage diminishes materially,the cap or reducer may be entirely re-moved. If the initial rate of leakagecontinues, further efforts must bemade to seat the outlet valve (see para-graph (f) of this section). If this fails,the cap or reducer must be screwed uptight and the tank must be unloadedthrough the dome. If upon removal ofthe outlet cap the outlet chamber isfound to be blocked with frozen liquidor any other matter, the cap must bereplaced immediately and a careful ex-amination must be made to determinewhether the outlet casting has beencracked. If the obstruction is not fro-zen liquid, the car must be unloadedthrough the dome. If the obstruction isfrozen liquid and no crack has beenfound in the outlet casting, the carmay, if circumstances require it, be un-loaded from the bottom by removingthe cap and attaching unloading con-nections immediately. Before openingthe valve inside the tank car, steammust be applied to the outside of theoutlet casting or wrap casting withburlap or other rags and hot watermust be applied to melt the frozen liq-uid.

(h) Unloading connections must besecurely attached to unloading pipeson the dome or to the bottom dischargeoutlets before any discharge valves areopened.

(i) Tank cars may not be allowed tostand with unloading connections at-tached after unloading is completed.


589


Throughout the entire period of un-loading, and while car is connected tounloading device, the car must be at-tended by the unloader.

(j) If necessary to discontinue un-loading a tank car for any reason, allunloading connections must be discon-nected. All valves must first be tightlyclosed, and the closures of all otheropenings securely applied.

(k) As soon as a tank car is com-pletely unloaded, all valves must bemade tight by the use of a bar, wrenchor other suitable tool, the unloadingconnections must be removed and allother closures made tight.

(l) Railroad defect cards may not beremoved.

(m) If oil or gasoline has been spilledon the ground around connections, itmust be covered with fresh, dry sand ordirt.

(n) All tools and implements used inconnection with unloading must bekept free of oil, dirt, and grit.

[Amdt. 174–26, 41 FR 16092, Apr. 15, 1976, asamended by Amdt. 174–26A, 41 FR 40685, Sept.20, 1976; Amdt. 174–43, 48 FR 27699, June 16,1983; Amdt. 174–68, 55 FR 52678, Dec. 21, 1990;56 FR 66280, Dec. 20, 1991; Amdt. 174–81, 60 FR49111, Sept. 21, 1995; Amdt. 174–83, 61 FR 28678,June 5, 1996]

§ 174.81 Segregation of hazardous ma-terials.

(a) This section applies to materialswhich meet one or more of the hazardclasses defined in this subchapter andare in packages which are required tobe labeled or placarded under the pro-visions of part 172 of this subchapter.

(b) When a rail car is to be trans-ported by vessel, other than a ferryvessel, hazardous materials on or with-in that rail car must be stowed andsegregated in accordance with§ 176.83(b) of this subchapter.

(c) In addition to the provisions ofparagraph (d) of this section, cyanidesor cyanide mixtures may not be loadedor stored with acids.

(d) Hazardous materials may not beloaded, transported, or stored together,except as provided in this section, andin accordance with the following table:


590

49 CFR Ch. I (10–1–98 Edition)§ 174.81

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591


(e) Instructions for using the segrega-tion table for hazardous materials inparagraph (d) of this section are as fol-lows:

(1) The absence of any hazard class ordivision, or a blank space in the tableindicates that no restrictions apply.

(2) The letter ‘‘X’’ in the table indi-cates that these materials may not beloaded, transported, or stored togetherin the same rail car or storage facilityduring the course of transportation.

(3) The letter ‘‘O’’ in the table indi-cates that these materials may not beloaded, transported, or stored togetherin the same rail car or storage facilityduring the course of transportation un-less separated in a manner that, in theevent of leakage from packages underconditions normally incident to trans-portation, commingling of hazardousmaterials would not occur. Notwith-standing the methods of separation em-ployed, Class 8 (corrosive) liquids maynot be loaded above or adjacent toClass 4 (flammable) or Class 5 (oxidiz-ing) materials; except that shippersmay load carload shipments of suchmaterials together when it is knownthat the mixture of contents would notcause a fire or a dangerous evolution ofheat or gas.

(4) The ‘‘*’’ in the table indicatesthat segregation among different Class

1 (explosive) materials is governed bythe compatibility table in paragraph (f)of this section.

(5) The note ‘‘A’’ in the second col-umn of the table means that, notwith-standing the requirements of the letter‘‘X’’, ammonium nitrate fertilizer maybe loaded or stored with Division 1.1(Class A explosive) or Division 1.5(blasting agents) materials.

(6) When the § 172.101 table or § 172.402of this subchapter requires a packageto bear a subsidiary hazard label, seg-regation appropriate to the subsidiaryhazard must be applied when that seg-regation is more restrictive than thatrequired by the primary hazard. How-ever, hazardous materials of the sameclass may be stowed together withoutregard to segregation required by anysecondary hazard if the materials arenot capable of reacting dangerouslywith each other and causing combus-tion or dangerous evolution of heat,evolution of flammable, poisonous, orasphyxiant gases, or formation of cor-rosive or unstable materials.

(f) Class 1 (explosive) materials maynot be loaded, transported, or storedtogether, except as provided in thissection, and in accordance with the fol-lowing table:

COMPATIBILITY TABLE FOR CLASS 1 (EXPLOSIVE) MATERIALS

Compatibility group A B C D E F G H J K L N S

A ............................................................................. X X X X X X X X X X X XB ............................................................................. X X 4 X X X X X X X X 4/5C ............................................................................ X X 2 2 X X X X X X 3 4/5D ............................................................................ X 4 2 2 X X X X X X 3 4/5E ............................................................................. X X 2 2 X X X X X X 3 4/5F ............................................................................. X X X X X X X X X X X 4/5G ............................................................................ X X X X X X X X X X X 4/5H ............................................................................ X X X X X X X X X X X 4/5J ............................................................................. X X X X X X X X X X X 4/5K ............................................................................. X X X X X X X X X X X 4/5L ............................................................................. X X X X X X X X X X 1 X XN ............................................................................ X X 3 3 3 X X X X X X 4/5S ............................................................................. X 4/5 4/5 4/5 4/5 4/5 4/5 4/5 4/5 4/5 X 4/5

(g) Instructions for using the compat-ibility table for Class 1 (explosive) ma-terials in paragraph (f) of this sectionare as follows:

(1) A blank space in the table indi-cates that no restrictions apply.

(2) The letter ‘‘X’’ in the table indi-cates that explosives of different com-patibility groups may not be carried on

the same rail car, unless packed in sep-arate freight containers (e.g., two ormore freight containers mounted uponthe same rail car).

(3) The numbers in the table meanthe following:

(i) ‘‘1’’ means explosives from com-patibility group L may only be carried


592

49 CFR Ch. I (10–1–98 Edition)§ 174.82

on the same rail car with an identicalexplosive.

(ii) ‘‘2’’ means any combination of ex-plosives from compatibility group C, D,or E is assigned to compatibility groupE.

(iii) ‘‘3’’ means any combination ofexplosives from compatibility group C,D, or E with those in compatibilitygroup N is assigned to compatibilitygroup D.

(iv) ‘‘4’’ means detonators and deto-nating primers, Division 1.4S (Class Cexplosives), may not be loaded in thesame car with Division 1.1 and 1.2(Class A explosive) materials.

(v) ‘‘5’’ means Division 1.4S fireworksmay not be loaded in the same car withDivision 1.1 or 1.2 (Class A explosive)materials.

(h) Except as provided in paragraph(i) of this section, explosives of thesame compatibility group but of dif-ferent divisions may be transported to-gether provided that the whole ship-ment is transported as though its en-tire contents were of the lower numeri-cal division (i.e., Division 1.1 beinglower than Division 1.2). For example,a mixed shipment of Division 1.2 (ClassA explosive) materials and Division 1.4(Class C explosive) materials, compat-ibility group D, must be transported asDivision 1.2 (Class A explosive) mate-rials.

(i) When Division 1.5 (blasting agent)materials, compatibility group D aretransported in the same freight con-tainer as Division 1.2 (Class A explo-sive) materials, compatibility group D,the shipment must be transported asDivision 1.1 (Class A explosive) mate-rials, compatibility group D.

[Amdt. 174–68, 55 FR 52678, Dec. 21, 1990, asamended at 56 FR 66280–66281, Dec. 20, 1991; 57FR 45464, Oct. 1, 1992; Amdt. 174–68, 57 FR59310, Dec. 15, 1992; Amdt. 174–75, 58 FR 50237,Sept. 24, 1993; Amdt. 174–83, 61 FR 51339, Oct.1, 1996]

Subpart D—Handling of PlacardedRail Cars, Transport Vehiclesand Freight Containers

§ 174.82 General requirements for thehandling of placarded rail cars,transport vehicles, freight contain-ers, and bulk packages.

(a) Unless otherwise specified, thissubpart does not apply to the handlingof rail cars, transport vehicles, freightcontainers, or bulk packagings, whichcontain Division 1.6, combustible liq-uids, Division 6.1 PG III materials,Class 9 materials, or ORM–D materials.

(b) A placarded rail car, transport ve-hicle, freight container, or bulk pack-age may not be transported in a pas-senger train.

[Amdt. 174–68, 55 FR 52680, Dec. 21, 1990, asamended at 56 FR 66281, Dec. 20, 1991; 57 FR45464, Oct. 1, 1992; Amdt. 174–74, 58 FR 51533,Oct. 1, 1993]

§ 174.83 Switching placarded rail cars,transport vehicles, freight contain-ers, and bulk packagings.

(a) In switching operations where theuse of hand brakes is necessary—

(1) It must be determined by trialwhether a loaded, placarded car, or acar occupied by a rider in a draft con-taining a placarded car, has its handbrakes in proper working condition be-fore it is cut off;

(2) A loaded, placarded tank car or adraft which includes a loaded placardedtank car may not be cut off until thepreceeding rail car clears the laddertrack; and

(3) A loaded, placarded tank car or adraft which includes a loaded placardedtank car must clear the ladder trackbefore another rail car is allowed tofollow.

(b) Any loaded rail car placarded fora Division 1.1 or Division 1.2 explosive,a Division 2.3 Hazard Zone A gas or aDivision 6.1 PG I Hazard Zone A mate-rial, or a Class DOT 113 tank car dis-playing a Division 2.1 (flammable gas)placard, including a Class DOT 113 tank


593


car containing only a residue of a Divi-sion 2.1 material, may not be:

(1) Cut off while in motion;(2) Coupled into with more force than

is necessary to complete the coupling;or

(3) Struck by any car moving underits own momentum.

(c) A placarded flatcar, or a flatcarcarrying a placarded transport vehicle,freight container, or bulk packagingunder this subchapter may not be cutoff while in motion.

(d) No rail car moving under its ownmomentum may be permitted to strikeany placarded flatcar or any flatcarcarrying a placarded transport vehicle,freight container, or bulk packaging.

(e) No placarded flatcar or any flat-car carrying a placarded transport ve-hicle, freight container, or bulk pack-aging may be coupled into with moreforce than is necessary to complete thecoupling.

(f) When transporting a rail car,transport vehicle, or freight containerplacarded for Division 1.1 or 1.2 (ClassA explosive) materials in a terminal,yard, or on a side track or siding, theplacarded rail car must be separatedfrom the engine by at least one non-placarded rail car and must be placedin a location so that it will be safefrom danger of fire. A rail car, trans-port vehicle, or freight container plac-arded for Division 1.1 or 1.2 (Class A ex-plosive) materials may not be placedunder a bridge or overhead crossing, orin or alongside a passenger shed or sta-tion, except during transfer operations.

[Amdt. 174–68, 55 FR 52680, Dec. 21, 1990, asamended at 56 FR 66281, Dec. 20, 1991; Amdt.174–75, 58 FR 50237, Sept. 24, 1993; Amdt. 174–77, 59 FR 48549, Sept. 21, 1994; Amdt. 174–83, 61FR 51339, Oct. 1, 1996]

§ 174.84 Position in train of loadedplacarded rail cars, transport vehi-cles, freight containers or bulkpackagings when accompanied byguards or technical escorts.

A rail car placarded in Division 1.1 or1.2 (Class A explosive); Division 2.3(Hazard Zone A; poisonous gas); or Di-vision 6.1 (PG I, Hazard Zone A; poison-ous liquid) in a moving or standingtrain must be next to and ahead of anycar occupied by the guards or technicalescorts accompanying the placardedrail car. However, if a rail car occupiedby the guards or technical escorts hastemperature control equipment in op-eration, it must be the fourth car be-hind any car requiring Division 1.1 or1.2 (Class A explosive) placards.

[Amdt. 174–68, 55 FR 52680, Dec. 21, 1990, asamended at 56 FR 66281, Dec. 20, 1991]

§ 174.85 Position in train of placardedcars, transport vehicles, freightcontainers, and bulk packagings.

(a) Except as provided in paragraphs(b) and (c) of this section, the positionin a train of each loaded placarded car,transport vehicle, freight container,and bulk packaging must conform tothe provisions of this section.

(b) A car placarded ‘‘RADIOACTIVE’’must comply with train positioning re-quirements of paragraph (d) of this sec-tion and must be separated from a lo-comotive, occupied caboose, or carloadof undeveloped film by at least onenon-placarded car.

(c) A tank car containing the residueof a hazardous material must be sepa-rated from a locomotive or occupiedcaboose by at least one rail car otherthan a placarded tank car.

(d) Position of rail cars in a train. Inthe following table:

POSITION IN TRAIN OF PLACARDED CARS TRANSPORTING HAZARDOUS MATERIALS

RESTRICTIONS

PlacardGroup 1

Placard Group2

Placard Group3

PlacardGroup 4

Rail Car TankCar

RailCar

TankCar

RailCar Rail Car

1. When train length permits, placarded car may not be nearer thanthe sixth car from the engine or occupied caboose.

X X X

2. When train length does not permit, placarded car must be placednear the middle of the train, but not nearer than the second carfrom an engine or occupied caboose.

X X X


594

49 CFR Ch. I (10–1–98 Edition)§ 174.86

POSITION IN TRAIN OF PLACARDED CARS TRANSPORTING HAZARDOUS MATERIALS—Continued

RESTRICTIONS

PlacardGroup 1

Placard Group2

Placard Group3

PlacardGroup 4

Rail Car TankCar

RailCar

TankCar

RailCar Rail Car

3. A placarded car may not be placed next to an open-top car whenany of the lading in the open top car protrudes beyond the carends, or if the lading shifted, would protrude beyond the car ends..

X X X

4. A placarded car may not be placed next to a loaded flat car, exceptclosed TOFC/COFC equipment, auto carriers, and other speciallyequipped cars with tie-down devices for securing vehicles. Perma-nent bulk head flat cars are considered the same as open-top cars.

X X X

5. A placarded car may not be placed next to any transport vehicle orfreight container having an internal combustion engine or an open-flame device in operation..

X X X

6. Placarded cars may not be placed next to each other based on thefollowing:

Placard Group 1 .............................................................................. X X X X XPlacard Group 2 .............................................................................. X X X XPlacard Group 3 .............................................................................. X X X XPlacard Group 4 .............................................................................. X X X X X

PLACARD GROUP:Group 1—Divisions 1.1 and 1.2 (Class A explosive) materials.Group 2—Divisions 1.3, 1.4, 1.5 (Class B and C explosive), Class 2 (compressed gas; other than Div 2.3, PG I, Zone A),

Class 3 (flammable liquid), Class 4 (flammable solid), Class 5 (oxidizing), Class 6 (poisonous liquid; other than Div 6.1, PG I,Zone A), and Class 8 (corrosive) materials.

Group 3—Divisions 2.3 (PG I, Zone A; poisonous gas) and 6.1 (PG I, Zone A; poisonous liquid) materials.Group 4—Class 7 (radioactive) materials.

(1) Where an ‘‘X’’ appears at theintersection of a Placard Group columnand a Restriction row, the correspond-ing restriction applies.

(2) ‘‘Rail Car’’ means a car other thana tank car.

(3) For purposes of this subpart, eachunit of an articulated intermodal railcar shall be considered as one car.

[Amdt. 174–68, 55 FR 52680, Dec. 21, 1990, asamended at 57 FR 45464, Oct. 1, 1992; Amdt.174–83, 61 FR 28678, June 5, 1996; Amdt.174–83,61 FR 50255, Sept. 25, 1996; Amdt. 174–83, 61FR 51339, Oct. 1, 1996]

§ 174.86 Maximum allowable operatingspeed.

For molten metals and molten glassshipped in packagings other than thoseprescribed in § 173.247 of this sub-chapter, the maximum allowable oper-ating speed may not exceed 15 mph forshipments by rail.

[Amdt. 174–69, 56 FR 49990, Oct. 2, 1991]

Subpart E—Class I (Explosive)Materials

§ 174.101 Loading Class 1 (explosive)materials.

(a) Boxes containing Division 1.1 or1.2 (Class A explosive) materials mustbe loaded so that the ends of wooden

boxes will not bear against sides of anyfiberboard boxes and so that the endsof any box will not cause a pressurepoint on a small area of another box.

(b) Explosive bombs, unfuzed projec-tiles, rocket ammunition and rocketmotors, Division 1.1, 1.2, or 1.3 (Class Aor Class B explosive) materials, whichare not packed in wooden boxes, orlarge metal packages of incendiarybombs, each weighing 226 kg (500pounds) or more, may be loaded instock cars or in flat bottom gondolacars only if they are adequately braced.Boxed bombs, rocket ammunition androcket motors, Division 1.1, 1.2, or 1.3(Class A or Class B explosive) mate-rials, which due to their size cannot beloaded in closed cars, may be loaded inopen-top cars or on flatcars, providedthey are protected from the weatherand accidental ignition.

(c) Boxes of Division 1.1 or 1.2 (ClassA explosive) materials packed in longcartridges, bags, or sift-proof liners,and containing no liquid explosive in-gredient, may be loaded on their sidesor ends.

(d) Division 1.1 or 1.2 (Class A explo-sive) materials may not be loaded high-er than any permanent car lining un-less additional lining is provided ashigh as the lading.


595


(e) When the lading of a car includesany Class 1 (explosive) materials, theweight of the lading must be distrib-uted insofar as possible to equalize theweight on each side of the car and overthe trucks.

(f) Except when boxed, metal kegscontaining Class 1 (explosive) mate-rials must be loaded on their sides withtheir ends toward the ends of the car.Packages of Class 1 (explosive) mate-rials may not be placed in the space op-posite the doors unless the doorwaysare boarded on the inside as high as thelading. This paragraph does not applyto palletized packages if they arebraced so they cannot fall or slide intothe doorways during transportation.

(g) Wooden kegs, fiber kegs, barrels,and drums must be loaded on theirsides or ends, to best suit the condi-tions.

(h) Packages containing any Division1.1 or 1.2 (Class A explosive) materialsfor (see § 174.104), detonators, detonatorassemblies, or boosters with detonatorsmust be securely blocked and braced toprevent the packages from changingposition, falling to the floor, or slidinginto each other, under conditions nor-mally incident to transportation. Class1 (explosive) materials must be loadedso as to avoid transfer at stations. Forrecommended methods of blocking andbracing, see Bureau of Explosives Pam-phlets No. 6 and 6A. Heavy packages orcontainers must be trucked, rolled, ormoved by skids, fork trucks, or otherhandling devices and may not bedropped from trucks, platforms, orcars. Planks for rolling trucks fromplatforms to cars must have beveledends. Loading platforms and the shoesof each workman must be free fromgrit. All possible precautions must betaken against fire. Class 1 (explosive)materials must be kept in a safe placeand inaccessible to unauthorized per-sons while being held by a carrier forloading or delivery.

(i) To prevent delays of local freighttrains, when there are shipments ofClass 1 (explosive) materials for dif-ferent destinations loaded in a ‘‘peddlercar’’ or ‘‘way car’’ the shipment foreach destination must be stayed sepa-rately.

(j) Forwarding and transfer stationsfor Class 1 (explosive) materials must

be provided with the necessary mate-rials for staying.

(k) Shippers must furnish the mate-rial for staying packages of Class 1 (ex-plosive) materials loaded by them.

(l) Division 1.1 or 1.2 (Class A explo-sive) materials may not be loaded,transported, or stored in a rail carequipped with any type of lighted heat-er or open-flame device, or electric de-vices having exposed heating coils, orin a rail car equipped with any appara-tus or mechanism utilizing an internalcombustion engine in its operation.

(m) [Reserved](n) A container car or freight con-

tainer on a flatcar or a gondola carother than a drop-bottom car, whenproperly loaded, blocked, and braced toprevent change of position under condi-tions normally incident to transpor-tation, may be used to transport anyDivision 1.1 or 1.2 (Class A explosive)material except black powder packedin metal containers. A freight con-tainer must be designed, constructed,and maintained so as to be weathertight and capable of preventing the en-trance of sparks. In addition:

(1) A freight container must be ofsuch design and so braced as to show noevidence of failure of the container orthe bracing when subjected to impactfrom each end of at least 13 km (8.1miles) per hour. Its efficiency shall bedetermined by actual test, usingdummy loads equal in weight and gen-eral character to material to beshipped.

(2) A container car or car which isloaded with freight containers must beplacarded with the Class 1 (explosive)materials placards as required by sub-part F of part 172 of this subchapterand with properly executed car certifi-cates as required by § 174.104.

(3) Lading must be so loaded,blocked, and braced within the freightcontainer that it will not change posi-tion under impact from each end of atleast 13 km (8.1 miles) per hour.

(o) Division 1.1, 1.2, or 1.3 (Class A orClass B explosive) materials may beloaded and transported in a tightclosed truck body or trailer on a flat-car. Wooden boxed bombs, rocket am-munition, and rocket motors, Division1.1, 1.2, or 1.3 (Class A or Class B explo-sive) materials, which due to their size


596

49 CFR Ch. I (10–1–98 Edition)§ 174.102

cannot be loaded in tight, closed truckbodies or trailers, may be loaded in oron open-top truck bodies or trailers.However, they must be protectedagainst accidental ignition. In addi-tion:

(1) Each truck body or trailer mustmeet the requirements of part 177 ofthis subchapter, applicable to ship-ments of Class 1 (explosive) materialsby motor vehicle.

(2) Each truck body or trailer mustbe so secured on the rail car so that itwill not permanently change positionor show evidence of failure or impend-ing failure of the method of securingthe truck body or trailer under impactfrom each end of at least 13 km (8.1miles) per hour. Its efficiency shall bedetermined by actual test, usingdummy loads equal in weight and gen-eral character to the material to beshipped. For recommended methods ofblocking and bracing, see Bureau of Ex-plosives Pamphlet 6C.

(3) Lading must be so loaded,blocked, and braced within or on thetruck body or trailer that it will notchange position under impact fromeach end of at least 13 km (8.1 miles)per hour. For recommended methods ofblocking and bracing see Bureau of Ex-plosives Pamphlet 6C.

(4) Each rail car containing Class 1(explosive) materials and each rail carloaded with truck bodies, trailers orcontainers containing Class 1 (explo-sive) materials must be placarded withClass 1 (explosive) materials placardsas required by subpart F of part 172 ofthis subchapter and with properly exe-cuted car certificates as required by§ 174.104.

(5) Each fuel tank of a heater or re-frigerating machinery on the truckbodies or trailers must be drained andall automatic heating or refrigeratingmachinery must be made inoperativeby disconnection of the automatic con-trols or the source of power for theiroperations.

[Amdt. 174–26, 41 FR 16092, Apr. 15, 1976, asamended by Amdt. 174–26A, 41 FR 40685, Sept.20, 1976; Amdt. 174–26B, 41 FR 57071, Dec. 30,1976; Amdt. 174–36, 44 FR 70732, Dec. 10, 1979;Amdt. 174–59, 51 FR 5974, Feb. 18, 1986; Amdt.174–68, 55 FR 52681, Dec. 21, 1990; Amdt. 174–83,61 FR 51339, Oct. 1, 1996]

§ 174.102 Forbidden mixed loading andstorage.

(a) Division 1.1 or 1.2 (Class A explo-sive) materials and initiating orpriming explosives may not be trans-ported together in the same rail car.Additionally, they may not be trans-ported or loaded in the same rail car orstored on carrier property with chargedelectric storage batteries or with anyhazardous material for which a NON-FLAMMABLE GAS, FLAMMABLEGAS, FLAMMABLE LIQUID, FLAM-MABLE SOLID, OXIDIZER, ORGANICPEROXIDE, RADIOACTIVE or CORRO-SIVE label is required.

(b) Class 1 (explosive) materials maynot be loaded together or with otherhazardous materials, except as pro-vided in § 174.81. See § 174.104 for loadingshipments of Class 1 (explosive) mate-rials or any other material in a plac-arded and certified car containing ashipment of Division 1.1 or 1.2 (Class Aexplosive) materials.


§ 174.103 Disposition of damaged orastray shipments.

(a) Packages of Class 1 (explosive)materials found damaged or broken intransit may be repaired when prac-ticable and not dangerous. A brokenbox of Division 1.1 or 1.2 (Class A explo-sive) materials that cannot be repairedmust be reinforced by stout wrappingpaper and twine, placed in anotherstrong box and surrounded by dry, finesawdust or dry and clean cotton wasteor elastic wads made from dry news-papers. A ruptured can or keg must besealed and enclosed in a strong clothbag of good quality and boxed. Dam-aged packages thus protected and prop-erly marked may be forwarded. Thebox and waybill must be marked to in-dicate that it has been repacked.

(b) Care must be exercised in repack-ing damaged containers so that nospark is produced by contact of metalor other hard surfaces which could ig-nite loose particles of explosive com-positions that may be strewn on carfloors or freight. In addition, the carfloors must be thoroughly swept, andwashed with a plentiful supply of


597


water. Iron-wheel trucks, metal ham-mers, or other metal tools that mayproduce sparks may not be used. Metaltools must be limited to those made ofbrass, bronze, or copper.

(c) Each package of Class 1 (explo-sive) materials showing evidence ofleakage of liquid ingredients must:

(1) Be refused if leakage is discoveredbefore acceptance;

(2) Be disposed of to a person who iscompetent and willing to remove themfrom the carrier’s property, if the leak-age is discovered while the shipment isin transit; or

(3) Be removed immediately by con-signee, if the leakage is discovered atthe shipment’s destination.

(d) When the disposition required byparagraph (c) of this section cannot bemade, the leaking package must bepacked in other boxes large enough topermit enclosure and the leaking boxesmust be surrounded by at least 5 cm (2inches) of dry, fine sawdust or dry andclean cotton waste, and be stored in astation magazine or other safe placeuntil the arrival of an inspector of theBureau of Explosives, or other author-ized person, to superintend the destruc-tion or disposition of the condemnedmaterial.

(e) If careful inspection shows thatan astray shipment of Class 1 (explo-sive) materials is in proper conditionfor safe transportation, it must be for-warded immediately to its destinationif known, or returned to the shipper bythe most practicable route.

(f) When a package in an astray ship-ment is not in proper condition for safetransportation (see paragraphs (a), (c),and (d) of this section), or when thename and address of the consignee andthe shipper are unknown, dispositionmust be made as prescribed by para-graphs (c) and (d) of this section.


§ 174.104 Division 1.1 or 1.2 (Class Aexplosive) materials; car selection,preparation, inspection, and certifi-cation.

(a) Except as provided in § 174.101 (b),(n), and (o), Division 1.1 or 1.2 (Class Aexplosive) materials being transportedby rail may be transported only in a

certified and properly placarded closedcar of not less than 36,300 kg (80,028pounds) capacity, with steel under-frames and friction draft gear or cush-ioned underframe, except that on anarrow-gauge railroad they may betransported in a car of less capacity aslong as the car of greatest capacity andstrength available is used.

(b) Each rail car used for transport-ing Division 1.1 or 1.2 (Class A explo-sive) materials must meet the follow-ing requirements as applicable:

(1) The car must be equipped with airbrakes, hand brakes, and roller bear-ings which are in condition for service.

(2) The car may not have any holes orcracks in the roof, sides, ends, or doorsthrough which sparks may enter, orunprotected decayed spots which mayhold sparks and start a fire.

(3) The roof of the car must be care-fully inspected from the outside for de-cayed spots, especially under or nearthe running board, and such spots mustbe covered or repaired to prevent theirholding fire from sparks. A car with aroof generally decayed, even if tight,may not be used.

(4) The doors must close tightly sothat sparks cannot get in at the joints,and, if necessary to achieve this degreeof tightness, the doors must bestripped. The stripping should beplaced on the inside and fastened to thedoor frames where it will form a shoul-der against which the closed doors arepressed by means of wedges or cleats indoor shoes or keepers. The openingsunder the doors should be similarlyclosed. The hasp fastenings must be ex-amined with the doors closed and fas-tened, and the doors must be cleatedwhen necessary to prevent them fromshifting. When the car is opened forany reason, the wedges or cleats mustbe replaced before car containing Class1 (explosive) materials is permitted toproceed.

(5) The roller bearings and the trucksmust be carefully examined and put insuch condition as to reduce to a mini-mum the danger of hotboxes or otherfailure necessitating the setting out ofthe car before reaching its destination.

(6) The car must be carefully sweptout before it is loaded. For less-than-carload shipments the space in whichthe packages are to be loaded must be


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49 CFR Ch. I (10–1–98 Edition)§ 174.104

carefully swept. If evidence of a poten-tial hazardous residue is apparent afterthe floor has been swept, the carriermust either decontaminate the car orprovide a suitable substitute car.

(7) Any holes in the floor or liningmust be repaired and special caretaken that there are no projectingnails or bolts or exposed pieces ofmetal which may work loose orproduce holes in packages of Class 1(explosive) materials during transit.Protruding nails in the floor or liningwhich have worked loose must bedrawn, and if necessary for the purposeof fastening the floor or lining, newnails must be driven through otherparts thereof.

(8) Metal floor plates must be com-pletely covered with wood, plywood, orfiber or composition sheets of adequatethickness and strength to prevent con-tact of the floor plates with the pack-ages of Class 1 (explosive) materialsunder conditions incident to transpor-tation, except that the covering ofmetal floor plates is not necessary forcarload shipments loaded by the De-partment of Defense provided the Class1 (explosive) materials are of such na-ture that they are not liable to leakageof dust, powder, or vapor which mightbecome the cause of an explosion.

(9) If the car is equipped with auto-mobile loading devices, it may not beused unless the loading device is se-curely attached to the roof of the carwith fastenings supplementing thosealready provided and so fixed that itcannot fall.

(10) The car must be equipped withhigh-friction composition brake shoes(except metal deck flat cars used forCOFC/TOFC service may be equippedwith high phosphorus cast iron brake-shoes) and brake rigging designed forthis type of brake shoe. Each brakeshoe on the car must be at least 1 cm(0.4 inch) thick, and in safe and suit-able condition for service.

(11) The car must have either a metalsubfloor with no combustible materialexposed beneath the car, or metalspark shields extending from centersill to side sills and from end sills to atleast 30 cm (12 inches) beyond the ex-treme treads of the inside wheels ofeach truck, which are tightly fittedagainst the subfloor so that there is no

vacant space or combustible materialexposed. The metal subfloor or sparkshields may not have an accumulationof oil, grease, or other debris whichcould support combustion.

(c) Before Division 1.1 or 1.2 (Class Aexplosive) materials may be loadedinto a rail car, the car must have beeninspected and certified to be in compli-ance with the requirements of para-graph (b) of this section by a qualifiedperson designated under § 215.11 of thistitle. The certification shall be made inCar Certificate No. 1 on the form pre-scribed in paragraph (f) of this section.

(d) If the carrier furnishes the car toa shipper for loading Division 1.1 or 1.2(Class A explosive) materials, the ship-per or his authorized employee shall,before commencing the loading of thecar, inspect the interior thereof, andafter loading certify to the proper con-dition of the car and the loading. Thiscertification shall be made on the firstsignature line in Car Certificate No. 2on the form prescribed in paragraph (f)of this section. In addition, the finishedload must be inspected and certified tobe in compliance with the require-ments of this part by a qualified persondesignated under § 215.11 of this titlebefore the car goes forward. This cer-tification shall be made on the secondsignature line in Car Certificate No. 2on the form prescribed in paragraph (f)of this section. If the loading is per-formed by the carrier, Car CertificateNo. 2 may only be signed by a qualifiedperson designated under § 215.11 of thistitle.

(e) If a trailer or container contain-ing Division 1.1 or 1.2 (Class A explo-sive) materials is loaded on a flatcar,the loading and securing of the load onthe car must be supervised by a rep-resentative of the shipper or carrier.The certification shall be made in CarCertificate No. 3 on the form prescribedin paragraph (f) of this section.

(f) Each car certificate for use in con-nection with the inspection of rail carsfor the carriage of Division 1.1 or 1.2(Class A explosive) materials shall beprinted on strong tag board measuring18 by 18 cm (7.1 by 7.1 inches) or 15 by20 cm (5.9 by 7.9 inches). It must beduly executed in triplicate by the car-rier, and by the shipper if he loads theshipments. The original must be filed


599


by the carrier at the forwarding sta-tion in a separate file and the othertwo must be attached to the car, one toeach outer side on a fixed placard boardor as otherwise provided.llllllllllllllllRailroad

CAR CERTIFICATE

No. 1 lllllll Station lllllllll19l.

I hereby certify that I have this day per-sonally examined Car Number lll andthat the car is in condition for service andcomplies with the FRA Freight Car SafetyStandards (49 CFR part 215) and with the re-quirements for freight cars used to transportexplosives prescribed by the DOT HazardousMaterials Regulation (49 CFR part 174).

Qualified Person Designated Under49 CFR 215.11


I have this day personally examined theabove car and hereby certify that the explo-sives in or on this car, or in or on vehicles orin containers have been loaded and braced;that placards have been applied, according tothe regulations prescribed by the Depart-ment of Transportation; and that the doorsof cars so equipped fit or have been strippedso that sparks cannot enter.

Shipper or his authorized agent

Qualified Person Designated Under49 CFR 215.11


I hereby certify that I have this day per-sonally supervised the loading of the vehi-cles or containers on and their securementto the above car.

Shipper or railway employee inspectingloading and securement

NOTE 1: A shipper must decline to use a carnot in proper condition.

NOTE 2: All certificates, where applicable,must be signed.

NOTE 3: Car certificates remaining on handas of the effective date of these regulationsmay be used until stocks are exhausted butnot after July 1, 1977.

[Amdt. 174–26, 41 FR 16092, Apr. 15, 1976]

EDITORIAL NOTE: For FEDERAL REGISTER ci-tations affecting § 174.104, see the List of CFRSections Affected appearing in the FindingAids section of this volume.

§ 174.105 Routing shipments, Division1.1 or 1.2 (Class A explosive) mate-rials.

Before a shipment of Division 1.1 or1.2 (Class A explosive) materials des-tined to a point beyond the lines of theinitial carrier is accepted from theshipper, the initial carrier shall ascer-tain that the shipment can go forwardby the route designated. To avoiddelays en route, the initial carriermust be in possession of full rate infor-mation before forwarding the ship-ment.


§ 174.106 ‘‘Order-Notify’’ or ‘‘C.O.D.’’shipments, Division 1.1 or 1.2 (ClassA explosive) materials.

(a) A carrier may not accept fortransportation Division 1.1 or 1.2 (ClassA explosive) materials, detonators, ordetonating primers in any quantitywhen consigned to ‘‘order-notify’’ or‘‘C.O.D.’’, except on a through bill oflading to a place outside the UnitedStates.

(b) A carrier may not accept fortransportation Division 1.1 or 1.2 (ClassA explosive) materials, detonators, ordetonating primers which the shipperconsigns to himself unless the shipperhas a resident representative to receivethem at the delivery point.

(c) A carrier may not accept Division1.1 or 1.2 (Class A explosive) materialsfor transportation subject to ‘‘stop-offprivileges en route for partial loadingor unloading.’’

[Amdt. 174–26, 41 FR 16092, Apr. 15, 1976, asamended by Amdt. 174–36, 44 FR 70732, Dec.10, 1979; Amdt. 174–68, 55 FR 52682, Dec. 21,1990]

§ 174.110 Car magazine.

When specially authorized by the car-rier, Division 1.1 or 1.2 (Class A explo-sive) materials in quantity not exceed-ing 68 kg (150 pounds) may be carried inconstruction or repair cars if the pack-ages of Class 1 (explosive) materials areplaced in a ‘‘magazine’’ box made ofsound lumber not less than 2.5 cm (0.98inch) thick, covered on the exteriorwith metal, and provided with strong


600

49 CFR Ch. I (10–1–98 Edition)§ 174.112

handles. The box must be plainly sten-ciled on the top, sides, and ends, in let-ters not less than 5 cm (2 inches) high,‘‘EXPLOSIVES—DANGEROUS—HAN-DLE CAREFULLY’’. The box must beprovided with strong hinges and with alock for keeping it securely closed. Va-cant space in the box must be filledwith a cushioning material such assawdust or excelsior, and the box mustbe properly stayed to prevent move-ment within the car. The car must beplacarded with EXPLOSIVES 1.1 or 1.2(EXPLOSIVES A) placards when themagazine contains Division 1.1 or 1.2(Class A explosive) materials.

[Amdt. 174–26, 41 FR 16092, Apr. 15, 1976, asamended by Amdt. 174–26A, 41 FR 40685, Sept.20, 1976; Amdt. 174–68, 55 FR 52682, Dec. 21,1990]

§ 174.112 Loading Division 1.3 (Class Bexplosive) materials and Division1.2 (devices corresponding to ClassB explosive) materials (Also see§ 174.101).

(a) Division 1.3 (Class B explosive)materials and Division 1.2 (devices cor-responding to Class B explosive) mate-rials may not be loaded, transported orstored in a rail car equipped with anytype of lighted heater or open-flamedevice, or in a rail car equipped withany apparatus or mechanism utilizingan internal combustion engine in itsoperation.

(b) Except as provided in § 174.101(b),(n), or (o) Division 1.3 (Class B explo-sive) materials and Division 1.2 (de-vices corresponding to Class B explo-sive) materials must be transported ina closed car or container car which isin good condition, and into whichsparks cannot enter. The car does notrequire the car certificates prescribedin § 174.104(c) through (f). If the doorsare not tight, they must be stripped toprevent the entrance of sparks. Woodfloored cars must be equipped withspark shields (see § 174.104). Packages ofDivision 1.3 (Class B explosive) mate-rials and Division 1.2 (devices cor-responding to Class B explosive) mate-rials must be blocked and braced toprevent their movement and possibledamage due to movement of otherfreight during transportation. For rec-ommended methods of blocking and

bracing see Bureau of Explosives Pam-phlet No. 6.

(c) Division 1.3 (Class B explosive)materials and Division 1.2 (devices cor-responding to Class B explosive) mate-rials may not be transported in a truckbody, trailer, or container on a flatcarunless:

(1) The truck body, trailer, or con-tainer is closed and tight;

(2) All automatic heating or refrig-erating machinery with which thetruck body, trailer, or container isequipped is inoperative; and

(3) Packages of Division 1.3 (Class Bexplosive) materials and Division 1.2(devices corresponding to Class B ex-plosive) materials are blocked andbraced within the truck body, trailer,or container to prevent their move-ment and possible damage due tomovement of other freight duringtransportation (ends, sidewalls, ordoors of the truck body, trailer, or con-tainer may not be relied on to preventthe shifting of heavy loads). For rec-ommended methods of blocking andbracing see Bureau of Explosives Pam-phlet No. 6C. See § 174.101(o).

[Amdt. 174–26, 41 FR 16092, Apr. 15, 1976, asamended by Amdt. 174–26B, 41 FR 57072, Dec.30, 1976; Amdt. 174–68, 55 FR 52682, Dec. 21,1990; Amdt. 174–83, 61 FR 51339, Oct. 1, 1996]

§ 174.114 Record to be made of changeof seals on ‘‘Cars loaded with Divi-sion 1.1 or 1.2 (explosive) mate-rials’’.

When a car seal is changed on a carrequiring ‘‘EXPLOSIVES 1.1 or EX-PLOSIVES 1.2 (EXPLOSIVES A) plac-ards’’ while en route or before deliveryto a consignee, a record of the changeshowing the following informationmust be made on or attached to thewaybill or other form of memorandumwhich must accompany the car to itsdestination:

Railroad Place Date

Car Initials Car Number Numberor description of seal broken

Number or description of seal used to resealcar llllllllllllllllllll

Reasons for opening car lllllllllll


601


Condition of load llllllllllllll

Name and occupation of person opening car

[Amdt. 174–26, 41 FR 16092, Apr. 15, 1976, asamended by Amdt. 174–26A, 41 FR 40685, Sept.20, 1976; Amdt. 174–68, 55 FR 52682, Dec. 21,1990]

§ 174.115 Loading Division 1.4 (Class Cexplosive) materials.

(a) Division 1.4 (Class C explosive)materials may be loaded into anyclosed car in good condition, or intoany container car in good condition.Car certificates are not required. Pack-ages of Division 1.4 (Class C explosive)materials must be blocked and bracedto prevent their movement and pos-sible damage due to movement of otherfreight during transportation. Formethods of recommended loading andbracing see Bureau of Explosives Pam-phlet No. 6.

(b) Division 1.4 (Class C explosive)materials may not be transported in atruck body, trailer, or container on aflatcar unless:

(1) The truck body, trailer, or con-tainer is closed and tight;

(2) All automatic heating or refrig-erating machinery with which thetruck body, trailer, or container isequipped is inoperative; and

(3) Packages of Division 1.4 (Class Cexplosive) materials are blocked andbraced within the truck body, trailer,or container to prevent their move-ment and possible damage due tomovement of other freight duringtransportation. Ends, side walls, ordoors of the truck body, trailer, or con-tainer may not be relied on to preventshifting of heavy loads. For rec-ommended methods of blocking andbracing see Bureau of Explosives Pam-phlet No. 6C.

[Amdt. 174–26, 41 FR 16092, Apr. 15, 1976, asamended by Amdt. 174–36, 44 FR 70732, Dec.10, 1979; Amdt. 174–68, 55 FR 52682, Dec. 21,1990]

Subpart F—Detailed Requirementsfor Class 2 (Gases) Materials

§ 174.200 Special handling require-ments.

(a) Division 2.1 (flammable gas) ma-terials may not be loaded, transported,or stored in a rail car equipped withany type of lighted heater or open-flame device, or in a rail car equippedwith any apparatus or mechanism uti-lizing an internal combustion engine inits operation.

(b) Division 2.1 (flammable gas) ma-terials may not be loaded in a truckbody or trailer equipped with any typeof lighted heater or any automaticheating or refrigerating apparatuswhen such truck bodies or trailers areloaded on flatcars except as provided inparagraph (c) of this section.

(c) Heating or refrigeration appara-tus may be operated on a motor vehicleloaded on a flatcar when the motor ve-hicle is loaded with Division 2.1 (flam-mable gas) materials only if:

(1) The lading space is not equippedwith any electrical apparatus that isnot non-sparking or explosion-proof;

(2) There is no combustion apparatusin the lading space;

(3) There is no connection for the re-turn of air from the lading space to anycombustion apparatus; and

(4) The heating system conforms to§ 393.77 of this title and does not heatany part of the lading over 54 °C (129°F).

[Amdt. 174–26, 41 FR 16092, Apr. 15, 1976, asamended by Amdt. 174–68, 55 FR 52682, Dec.21, 1990; 56 FR 66281, Dec. 20, 1991]

§ 174.201 Class 2 (gases) material cyl-inders.

(a) Except as provided in paragraphs(b) and (c) of this section, cylinderscontaining Class 2 (gases) materialsbeing transported in a rail car must be:

(1) Securely lashed in an upright po-sition so as to prevent their overturn-ing;

(2) Loaded into racks securely at-tached to the car;


602

49 CFR Ch. I (10–1–98 Edition)§ 174.204

(3) Packed in boxes or crates of suchdimensions as to prevent their over-turning; or

(4) Loaded in a horizontal position.(b) Specification DOT–4L (§ 178.57 of

this subchapter) cylinders being trans-ported in a rail car must be loaded inan upright position and be securelybraced.

(c) Cylinders containing Class 2(gases) materials may be transportedin stock cars, gondola cars and flatcars. However, they may not be trans-ported in hopper bottom cars.

[Amdt. 174–26, 41 FR 16092, Apr. 15, 1976, asamended by Amdt. 174–26A, 41 FR 40685, Sept.20, 1976; Amdt. 174–32, 43 FR 48644, Oct. 19,1978; Amdt. 174–68, 55 FR 52682, Dec. 21, 1990]

§ 174.204 Tank car delivery of gases,including cryogenic liquids.

(a) A tank car containing Class 2(gases) material may not be unloadedunless it is consigned for delivery andunloaded on a private track (see § 171.8of this subchapter). However, if a pri-vate track is not available, it may bedelivered and unloaded on carriertracks subject to the following condi-tions:

(1) A tank car of DOT–106A or 110Atype (§ 179.300 or § 179.301 of this sub-chapter) may not be delivered and theloaded unit tanks may not be removedfrom the car frame on carrier tracks.However, a carrier may give permissionfor the unloading of these containerson carrier tracks only if a private sid-ing is not available within a reasonabletrucking distance of the final destina-tion. In addition, before the car is ac-cepted for transportation, the shippermust obtain from the delivering carrierand file with the originating carrier,written permission for the removal andthe consignee must furnish an ade-quately strong mechanical hoist bywhich the tanks can be lifted from thecar and deposited directly upon vehi-cles furnished by the consignee for im-mediate removal from carrier property.

(2) The following tank cars may notbe delivered and unloaded on carriertracks unless the lading is piped di-rectly from the car to permanent stor-age tanks of sufficient capacity to re-ceive the entire contents of the car;however, such cars may be stored on aprivate track (see § 171.8 of this sub-

chapter) or on carrier tracks des-ignated by the carrier for such storage:

(i) A tank car containing Division 2.1(flammable gas) material that is acryogenic liquid; or

(ii) A tank car, except for a DOT–106A or 110A multi-unit tank car tank(§ 179.300 or § 179.301 of this subchapter),containing anhydrous ammonia; hydro-gen chloride, refrigerated liquid; hy-drocarbon gas, liquefied; or liquefiedpetroleum gas; and having interiorpipes for liquid and gas dischargevalves equipped with check valves.

(b) [Reserved]

[Amdt. 174–26, 41 FR 16092, Apr. 15, 1976, asamended by Amdt. 174–26A, 41 FR 40685, Sept.20, 1976; Amdt. 174–32, 43 FR 48644, Oct. 19,1978; Amdt. 174–43, 48 FR 27699, June 16, 1983;48 FR 50440, 50441, Nov. 1, 1983; Amdt. 174–68,55 FR 52682, Dec. 21, 1990]

§ 174.290 Materials extremely poison-ous by inhalation shipped by, for,or to the Department of Defense.

(a) General. The provisions of thissection apply only to materials ex-tremely poisonous by inhalation whichare Division 2.3 materials in HazardZone A and Division 6.1 materials inHazard Zone A, as defined in§ 173.133(a)(2) of this subchapter. Suchmaterials when shipped by, for, or tothe Department of Defense may betransported by rail only if loaded andhandled in accordance with the re-quirements of this section.

(b) A Division 2.3 Hazard Zone A or aDivision 6.1 Hazard Zone A material ex-tremely poisonous by inhalation maybe transported in:

(1) UN 1N1 or UN 1N2 metal drums orequivalent military specification metaldrums, by boxcar, gondola car (flat bot-tom), or stock car in carload lots. See§ 174.55(a) (1) through (4) and § 174.600 forblocking, bracing, and stowage require-ments;

(2) Tanks which are authorized underthis subchapter for a Hazard Zone Amaterial extremely poisonous by inha-lation, Specification DOT 106A(§§ 179.300 and 179.301 of this sub-chapter), mounted on or secured to amulti-unit car or gondola car (flat bot-tom) in carload lots only;

(3) Bombs, by boxcar, or gondola car(flat bottom) in carload lots only; or


603


(4) Projectiles or ammunition forcannon with gas filled projectiles, byboxcar in carload or less-than-carloadlots.

(c) Each shipment of one or more car-loads of a material extremely poison-ous by inhalation, as described in para-graph (b) of this section, must be ac-companied by a Department of Defensequalified escort supplied with equip-ment to handle leaks and other pack-aging failures which could result in es-cape of the material. The escort shallremain with the shipment during theentire time that it is in the custody ofthe carrier and in the event of leakageor escape of material, shall make re-pairs and perform decontamination asnecessary.

(d) When a material extremely poi-sonous by inhalation is transported ina tank, the tank must be securelymounted on a rail car especially pro-vided for it or on a gondola car pre-pared with substantial wooden framesand blocks.

(e) Bombs, projectiles, and cannonammunition being transported by railmust be loaded, blocked and braced asshown in Bureau of Explosives Pam-phlet No. 6A, or Department of Defensespecifications. When a shipment isloaded in a gondola car it must be se-curely blocked and braced and notloaded higher than the sides of the car.

(f) When a material extremely poi-sonous by inhalation is transported indrums with filling holes in the heads,they must be loaded on their bottoms.They may be loaded in rows, length-wise of the car and any space betweenthe sides of the car and the nearest rowof drums must be ‘‘filled in’’ withwooden boards or lumber nailed tosides of the car sufficient in length andwidth to contact both hoops of drums,or they may be loaded across the car instaggered stacks of which the numberof drums in alternate stacks is reducedby one drum. All drums in stacks fol-lowing the first stack loaded in the endof the car must be placed tightly intothe angle of the space formed by thesidewalls of the drum in the precedingstack. Any space between the sides ofthe car and the drums in stacks havingthe greater number of drums must befilled in with wooden boards or lumbernailed to sides of the car sufficient in

length and width to contact both hoopsof the drums.

(g) When a material extremely poi-sonous by inhalation is transported indrums with filling holes in the sides,they must be loaded on their sides withthe filling holes up. They must be load-ed lengthwise of the car in rows andany space between the sides of the carand the nearest row of drums must befilled in with wooden boards or lumbernailed to sides of the car sufficient inlength and width to contact both hoopsof the drums.

(h) When a material extremely poi-sonous by inhalation is transported indrums in a boxcar, they must be loadedfrom ends of the car toward the spacebetween the car doors, and therebraced by center gates and wedges. SeeSketch 1, Bureau of Explosives Pam-phlet No. 6.

(i) The doorways of a boxcar in whicha material poisonous by inhalation isbeing transported must be protected byone of the methods prescribed inSketch 1, Bureau of Explosives Pam-phlet No. 6A.

[Amdt. 174–68, 55 FR 52683, Dec. 21, 1990;Amdt. 174–74, 58 FR 51533, Oct. 1, 1993]

Subpart G—Detailed Require-ments for Class 3 (FlammableLiquid) Materials

§ 174.300 Special handling require-ments.

(a) Class 3 (flammable liquid) mate-rials may not be loaded, transported,or stored in a rail car equipped withany type of lighted heater or open-flame device, or in a rail car equippedwith any apparatus or mechanism uti-lizing an internal combustion engine inits operation.

(b) A truck body or trailer which isloaded with a Class 3 (flammable liq-uid) materials and equipped with alighted heater or any automatic heat-ing or refrigerating apparatus may notbe loaded on a flatcar except as pro-vided in paragraph (c) of this section.

(c) Heating or refrigeration appara-tus on a motor vehicle loaded withClass 3 (flammable liquid) materialsmay be operated while the motor vehi-cle is loaded on a flatcar only if:


604

49 CFR Ch. I (10–1–98 Edition)§ 174.304

(1) The lading space is not equippedwith any electrical apparatus that isnot non-sparking or explosion-proof;

(2) There is no combustion apparatusin the lading space;

(3) There is no connection for the re-turn of air from the lading space to anycombustion apparatus; and

(4) The heating system conforms to§ 393.77 of this title and does not heatany part of the lading over 54 °C (129°F).

(d) Metal barrels or drums containingClass 3 (flammable liquid) materialsmay be transported in a steel gondolaor flatcar or in a stock car. However,they may not be transported in a hop-per bottom car.

[Amdt. 174–26, 41 FR 16092, Apr. 15, 1976, asamended by Amdt. 174–31, 43 FR 31143, July20, 1978; Amdt. 174–68, 55 FR 52683, Dec. 21,1990]

§ 174.304 Class 3 (flammable liquid)materials in tank cars.

A tank car containing a Class 3(flammable liquid) material, otherthan liquid road asphalt or tar, maynot be transported by rail unless it isoriginally consigned or subsequentlyreconsigned to a party having a privatetrack on which it is to be delivered andunloaded (see § 171.8 of this subchapter)or to a party using railroad siding fa-cilities which are equipped for pipingthe liquid from the tank car to perma-nent storage tanks of sufficient capac-ity to receive the entire contents of thecar.

[Amdt. 174–26, 41 FR 16092, Apr. 15, 1976, asamended by Amdt. 174–32, 43 FR 48644, Oct.19, 1978; Amdt. 174–68, 55 FR 52683, Dec. 21,1990]

Subparts H–I [Reserved]

Subpart J—Detailed Requirementsfor Division 6.1 (Poisonous)Materials

§ 174.600 Special handling require-ments for materials extremely poi-sonous by inhalation.

A tank car containing a material ex-tremely poisonous by inhalation whichis a Division 2.3 material in HazardZone A or a Division 6.1 material inHazard Zone A, as defined in

§ 173.133(a)(2) of this subchapter, maynot be transported by rail unless it isoriginally consigned or subsequentlyreconsigned to a party having a privatetrack on which it is to be delivered andunloaded (see § 171.8 of this subchapter)or to a party using railroad siding fa-cilities which are equipped for pipingthe liquid or gas from the tank car topermanent storage tanks or sufficientcapacity to receive the entire contentsof the car. See the requirements in§ 174.290 for materials extremely poi-sonous by inhalation which are shippedby, for, or to the Department of De-fense.

[Amdt. 174–68, 55 FR 52684, Dec. 21, 1990]

§ 174.615 Cleaning cars.

(a) [Reserved](b) After Division 6.1 (poisonous) ma-

terials are unloaded from a rail car,that car must be thoroughly cleanedunless the car is used exclusively in thecarriage of Division 6.1 (poisonous) ma-terials.

[Amdt. 174–26, 41 FR 16092, Apr. 15, 1976, asamended by Amdt. 174–68, 55 FR 52684, Dec.21, 1990; Amdt. 174–82, 61 FR 18933, Apr. 29,1996]

§ 174.680 Division 6.1 (poisonous) ma-terials with foodstuffs.

(a) A carrier may not transport anypackage bearing a POISON or POISONINHALATION HAZARD label in thesame car with any material marked asor known to be a foodstuff, feed, or anyother edible material intended for con-sumption by humans or animals.

(b) A carrier must separate any pack-age bearing a KEEP AWAY FROMFOOD label from materials marked asor known to be foodstuffs, feed, or anyother edible materials intended forconsumption by humans or animals asrequired in § 174.81(e)(3) for classesidentified with the letter ‘‘O’’ in theSegregation Table for Hazardous Mate-rials.

[Amdt. 174–68, 55 FR 52684, Dec. 21, 1990, asamended by Amdt. 174–84, 62 FR 1236, Jan. 8,1997]


605


Subpart K—Detailed Requirementsfor Class 7 (Radioactive) Materials

§ 174.700 Special handling require-ments for Class 7 (radioactive) ma-terials.

(a) Each rail shipment of low specificactivity materials or surface contami-nated objects as defined in § 173.403 ofthis subchapter must be loaded so as toavoid spillage and scattering of loosematerial. Loading restrictions are pre-scribed in § 173.427 of this subchapter.

(b) The number of packages of Class 7(radioactive) materials that may betransported by rail car or stored at anysingle location is limited to a totaltransport index number (as defined in§ 173.403 of this subchapter) of not morethan 50. This provision does not applyto exclusive use shipments as describedin §§ 173.403, 173.427, 173.441, and 173.457of this subchapter.

(c) Each package of Class 7 (radio-active) material bearing RADIO-ACTIVE YELLOW–II or RADIOACTIVEYELLOW–III labels may not be placedcloser than 0.9 meter (3 feet) to an area(or dividing partition between areas)which may be continuously occupiedby any passenger, rail employee, orshipment of one or more animals, norcloser than 4.5 meters (15 feet) to anypackage containing undeveloped film(if so marked). If more than one pack-age of Class 7 (radioactive) materials ispresent, the distance must be com-puted from the table below on the basisof the total transport index number(determined by adding together thetransport index numbers on the labelsof the individual packages) of packagesin the rail car or storage area:

Total transport index

Minimum separa-tion distance to

nearest undevel-oped film

Minimum dis-tance to area ofpersons or mini-mum distancefrom dividingpartition of a

combination carMeters Feet

Meters Feet

None ....................... 0 0 0 00.1 to 10.0 .............. 4.5 15 0.9 310.1 to 20.0 ............ 6.7 22 1.2 420.1 to 30.0 ............ 7.7 29 1.5 530.1 to 40.0 ............ 10 33 1.8 640.1 to 50.0 ............ 10.9 36 2.1 7

Note: The distance in this table must be measured from thenearest point on the nearest packages of Class 7 (radioactive)materials.

(d) Each fissile material, controlledshipment must be transported in ac-cordance with one of the methods pre-scribed in § 173.457 of this subchapter.The transport controls must be ade-quate to assure that no fissile mate-rial, controlled shipment is transportedin the same transport vehicle with anyother fissile Class 7 (radioactive) mate-rial shipment. In loading and storageareas, each fissile material, controlledshipment must be segregated by a dis-tance of at least 6 meters (20 feet) fromother packages required to bear one ofthe ‘‘radioactive’’ labels described inpart 172 of this subchapter.

(e) A person shall not remain unnec-essarily in, on or near a transport vehi-cle containing Class 7 (radioactive) ma-terials.

(f) In the case of packages shippedunder the exclusive use provisions of§ 173.441(b) of this subchapter for pack-ages with external radiation levels inexcess of 2 mSv per hour (200 mrem perhour) at the package surface—

(1) The transport vehicle must meetthe requirements for a closed transportvehicle (§ 173.403 of this subchapter);

(2) Each package must be secured sothat its position within the transportvehicle remains fixed under conditionsnormally incident to transportation;and

(3) The radiation level may not ex-ceed 0.02 mSv per hour (2 mrem perhour) in any normally occupied posi-tion in the transport vehicle or adja-cent rail car.

[Amdt. 174–80, 60 FR 50331, Sept. 28, 1995, asamended by Amdt. 174–80, 61 FR 20753, May 8,1996]

§ 174.715 Cleanliness of transport vehi-cles after use.

(a) Each transport vehicle used fortransporting Class 7 (radioactive) ma-terials as exclusive use, as defined in§ 173.403 of this subchapter, must besurveyed with appropriate radiationdetection instruments after each use. Atransport vehicle may not be returnedto service until the radiation dose rateat any accessible surface is 0.005 mSvper hour (0.5 mrem per hour) or less,and there is no significant removableradioactive surface contamination, asdefined in § 173.443 of this subchapter.


606

49 CFR Ch. I (10–1–98 Edition)§ 174.750

(b) This section does not apply to anytransport vehicle used solely for trans-porting Class 7 (radioactive) materialsif a survey of the interior surfaceshows that the radiation dose rate doesnot exceed 0.1 mSv per hour (10 mremper hour) at the interior surface or 0.02mSv per hour (2 mrem per hour) at 1meter (3.3 feet) from any interior sur-face. The transport vehicle must bestenciled with the words ‘‘FOR RADIO-ACTIVE MATERIALS USE ONLY’’ inlettering at least 7.6 centimeters (3inches) high in a conspicuous place onboth sides of the exterior of the trans-port vehicle, and it must be kept closedat all times other than during loadingand unloading.

[Amdt. 174–80, 60 FR 50332, Sept. 28, 1995]

§ 174.750 Incidents involving leakage.

(a) In addition to the incident report-ing requirements of §§ 171.15 and 171.16of this subchapter, the carrier shallalso notify the offeror at the earliestpracticable moment following any inci-dent in which there has been breakage,spillage, or suspected radioactive con-tamination involving Class 7 (radio-active) materials shipments. Transportvehicles, buildings, areas, or equipmentin which Class 7 (radioactive) materialshave been spilled may not be againplaced in service or routinely occupieduntil the radiation dose rate at everyaccessible surface is less than 0.005mSv per hour (0.5 mrem per hour) andthere is no significant removable radio-active surface contamination (see§ 173.443 of this subchapter).

(b) The package or materials shouldbe segregated as far as practicablefrom personnel contact. If radiologicaladvice or assistance is needed, the U.S.Department of Energy (DOE) shouldalso be notified. In case of obviousleakage, or if it appears likely that theinside container may have been dam-aged, care should be taken to avoid in-halation, ingestion, or contact with theClass 7 (radioactive) material. Anyloose Class 7 (radioactive) materialsshould be left in a segregated area and

held pending disposal instructions,from qualified persons.

[Amdt. 174–26, 41 FR 16092, Apr. 15, 1976, asamended by Amdt. 174–42, 48 FR 10245, Mar.10, 1983; Amdt. 174–61, 51 FR 34987, Oct. 1,1986; Amdt. 174–65, 53 FR 38274, Sept. 29, 1988;Amdt. 174–68, 55 FR 52684, Dec. 21, 1990; Amdt.174–80, 60 FR 50332, Sept. 28, 1995]

PART 175—CARRIAGE BYAIRCRAFT

Subpart A—General Information andRegulations

Sec.175.1 Purpose and scope.175.3 Unacceptable hazardous materials

shipments.175.5 Applicability.175.10 Exceptions.175.20 Compliance and training.175.25 Notification at air passenger facili-

ties of hazardous materials restrictions.175.26 Notification at cargo facilities of haz-

ardous materials requirements.175.30 Accepting and inspecting shipments.175.31 Reports of discrepancies.175.33 Notification of pilot-in-command.175.35 Shipping papers aboard aircraft.175.40 Keeping and replacement of labels.

Subpart B—Loading, Unloading andHandling

175.75 Quantity limitations aboard aircraft.175.78 Stowage compatibility of cargo.175.79 Orientation of cargo.175.81 Securing of packages containing haz-

ardous materials.175.85 Cargo location.175.88 Inspection of unit load devices.175.90 Damaged shipments.

Subpart C—Specific Regulations Applica-ble According to Classification of Ma-terial

175.305 Self-propelled vehicles.175.310 Transportation of flammable liquid

fuel in small, passenger-carrying air-craft.

175.320 Cargo aircraft only; only means oftransportation.

175.630 Special requirements for Division 6.1(poisonous) material and Division 6.2 (in-fectious substance) material.

175.700 Special limitations and require-ments for Class 7 (radioactive) materials.


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