1、Designation: E2518 11Standard Specification forCargo Bed Cover, Type IV (M923, 5 Ton Cargo Truck/M1083,5 Ton Medium Tactical Vehicle (MTV)/ M1082, 5 Ton MTVTrailer)1This standard is issued under the fixed designation E2518; the number immediately following the designation indicates the year oforigin
2、al adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope1.1 This specification covers the general requirements forthe Type IV
3、 Cargo Bed Cover (CBC). The Type IV CBC is aremovable general purpose rigid wall enclosure that is mountedto the following model 5 ton cargo trucks: (1) the M923Medium Tactical Vehicle (MTV) and (2) the M1083 MTV. Italso can be mounted on the M1095 5 Ton MTV Trailer. TheCBC provides environmental pr
4、otection and security for mis-sion equipment and items of general transport.1.2 The values stated in inch-pound units are to be regardedas standard. No other units of measurement are included in thisstandard.1.3 The following safety hazards caveat pertains only to thetest required portion, Section 4
5、, of this specification: Thisstandard does not purport to address all of the safety concerns,if any, associated with its use. It is the responsibility of the userof this standard to establish appropriate safety and healthpractices and determine the applicability of regulatory require-ments prior to
6、use.2. Referenced Documents2.1 ASTM Standards:2E1925 Specification for Engineering and Design Criteria forRigid Wall Relocatable StructuresF501 Test Method for Aerospace Materials Response toFlame, with Vertical Test Specimen (For Aerospace Ve-hicles Standard Conditions)32.2 Federal Standards:4FED-S
7、TD-595 Colors Used in Government Procurement2.3 Military Standards:4MIL-STD-209 Slinging and Tiedown Provisions for Liftingand Tying Down Military EquipmentMIL-STD-810 Environmental Test Methods and Engineer-ing GuidelinesMIL-STD-1366 Transportability CriteriaMIL-STD-1472 Design Criteria: Human Engi
8、neeringMIL-DTL-53039 Coating, Aliphatic Polyurethane, SingleComponent, Chemical Agent ResistantMIL-DTL-53072 Chemical Agent Resistant Coating(CARC) SystemApplication Procedures and Quality Con-trol Inspection2.4 Military Handbooks:4MIL-HDBK-759 Human Engineering DesignMIL-HDBK-1791 Designing for Int
9、ernal Aerial Delivery inFixed Winged Aircraft2.5 OSHA Documents:5Title 29 CFR 19102.6 ACGIH Documents:6ACGIH Threshold Limit Values3. General Requirements3.1 First ArticleWhen specified (see 6.2), a sample shallbe subjected to first article inspection in accordance with 4.1.1.A first article is defi
10、ned as a pre-production or an initialproduction sample consisting of one or more of each type ofcompleted CBC.3.2 ConformanceItems furnished under this specificationshall be subjected to conformance inspection in accordancewith 4.1.2.3.3 Operating RequirementsUnless otherwise specified,the Type IV C
11、BC shall meet the following operating require-ments in both the height extended and height retracted con-figurations.3.3.1 ConfigurationsThe Type IV CBC shall have twoconfigurations, height extended and height retracted. The1This specification is under the jurisdiction of ASTM Committee E06 onPerfor
12、mance of Buildings and is the direct responsibility of Subcommittee E06.53on Materials and Processes for Durable Rigidwall Relocatable Structures.Current edition approved Sept. 1, 2011. Published October 2011. Originallyapproved in 2006. Last previous edition approved in 2006 as E2518 06. DOI:10.152
13、0/E2518-11.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.3Withdrawn. The last approved version of this hist
14、orical standard is referencedon www.astm.org.4Available from Standardization Documents Order Desk, DODSSP, Bldg. 4,Section D, 700 Robbins Ave., Philadelphia, PA 19111-5098, http:/www.dodssp.daps.mil.5Available from Occupational Safety and Health Administration (OSHA), 200Constitution Ave., NW, Washi
15、ngton, DC 20210, http:/www.osha.gov.6Available from American Conference of Governmental Industrial Hygienists,Inc. (ACGIH), 1330 Kemper Meadow Dr., Suite 600, Cincinnati, OH 45240,http:/www.acgih.org.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,
16、 United States.height extended configuration is the normal operating configu-ration for the CBC and provides for maximum usable volume.The height retracted configuration provides less usable volumebut is capable of being loaded on the C-130 and C-141 MilitaryAirlift Command (MAC) fixed wing aircraft
17、. Unless otherwisespecified, the CBC shall meet all the requirements of thisspecification sheet in both the height extended and heightretracted configurations.3.3.2 Height Adjustment DeviceIn both its payloaded (see3.3.8) and non-payloaded configurations the Type IV CBCshall be capable of being manu
18、ally extended from its retractedconfiguration and vise versa by two soldiers in 20 min usingonly the tools of the Basic Issue Items (BII) and theAdditionalAuthorization List (AAL) as described in the carriers Opera-tors Manual, and tools supplied with the CBC. Any hardwareor special tools required f
19、or extending/retracting the CBC shallbe provided as part of the CBC. Additional materials handlingequipment shall not be required. The CBC shall be capable ofmultiple extension/retraction cycles, in accordance with itsmanual, without damage or degradation to either the CBC, itscarrier, or its height
20、 adjustment devise.3.3.3 CBC Service Life, Reliability, and MaintainabilityThe service life for the CBC shall be at least 15 years. Themean time to repair at the organizational and intermediate levelshall not exceed 4 hours at the 90th percentile. Gaskets, seals,flaps, and other materials shall be f
21、ixed to the CBC and shall bereplaceable.3.3.4 Personnel Hazards:3.3.4.1 MechanicalThe CBC shall conform to regulatoryand consensus design safety standards, unless military appli-cations require more stringent limits, and reflect applicablesystem and personnel safety factors. The CBC shall provideper
22、sonnel maximum access and safety while installing, oper-ating, and maintaining the equipment.3.3.4.2 Edge RoundingAll exposed edges and cornersshall be rounded. Sharp edges and corners that can present apersonnel safety hazard or caused equipment damage duringoperation and maintenance shall be round
23、ed or suitably pro-tected.3.3.5 Toxicity:3.3.5.1 MaterialsCertain chemicals have been identifiedin Title 29 CFR 1910 as cancer-producing substances (carcino-gens). Materials used in the CBC shall not contain thesechemicals. Consideration of the human toxicity of a substanceshould be given prior to m
24、aterial selection.3.3.5.2 Gases or VaporsThe materials, as installed in theequipment and under service conditions specified in the equip-ment specification, shall not liberate noxious odors, toxic orcorrosive gases, or vapors that would be detrimental to thehealth of personnel.3.3.6 VentsThe CBC sha
25、ll include two vents for fresh airventilation.The vents shall be located to facilitate fresh air flowthrough the cargo area. The vents shall prevent intrusion ofdriven rain and have provisions for blackout. Vents shall becapable of providing ventilation when the vehicle is bothstationary and on the
26、move. Vents requiring operation shall becapable of being operated manually. The interior surface of thedoor shall have a warning in at least 112 in. high letterscontrasting the color of the door. The warning shall say“WarningSuffocation hazard, door must remain open whileoccupied.” This requirement
27、shall apply to the Type IV CBCsin the height extended configuration only.3.3.7 Roof LoadsThe CBC roof shall be capable ofsupporting, without structural damage, degradation or perma-nent deformation: (1) a uniformly distributed load of 40 lb/ft2over the entire surface and (2) a concentrated load of 6
28、60 lbover a 1 3 2 ft area applied anywhere on the roof.3.3.8 Interior Payload ProvisionsThe CBC shall be ca-pable of accepting threaded fasteners such as rivnuts andinserts for mounting equipment to the interior of the CBC. TheType IV CBC and its Interior Payload Provisions shall becapable of suppor
29、ting at least 1100 lb of payload during itsstationary, rail transport, ground mobility and crane liftingoperation modes without damage or degradation to either theCBC or its interior payload provisions. The payload shall beattached to the interior surfaces using interior payload provi-sions and shal
30、l be distributed as follows: 200 lb mounted toeach of the four wall surfaces, or 400 lb mounted to each of thetwo side wall surfaces, and 300 lb mounted to the ceiling.3.3.9 Personnel Door Loads:3.3.9.1 Personnel Door StructureThe personnel door, in-cluding its frame(s) and hardware, shall be capabl
31、e of support-ing a 200 lb static load without damage or degradation to eitherthe CBC or its personnel door, frame(s) and hardware.The loadshall be applied parallel to the hinge line, along the door edgeopposite the hinge, with the personnel door open to 90 degrees.The personnel door shall operate fr
32、eely after application of theload.3.3.9.2 Door StopThe personnel door, including itsframe(s) and hardware, shall withstand a wind gust of 60 mphin any direction when the door is secured by its door stop.3.3.10 Surface Impact ResistanceThe exterior surface ofthe CBCs roof shall be capable of withstan
33、ding a blow from a30 lb steel cylinder, 3 in. in diameter with a hemispherical end,dropped from a height of 30 in., without structural degradation.All other exterior wall surfaces shall be capable of withstand-ing a blow from the same steel cylinder, dropped from a heightof 16 in., without structura
34、l degradation.3.3.11 Tailgate OperationThe CBC, when mounted on itscarrier, shall not inhibit operation of the carriers tailgate.3.3.12 BlackoutThe CBC/carrier combination, with thepersonnel door and ports closed, shall not permit a light sourcefrom within to emit detectable amounts of light. This r
35、equire-ment shall apply to the Type IV CBCs in the height extendedconfiguration only.3.4 Support and Ownership RequirementsUnless other-wise specified, the Type IV CBC shall meet the followingsupport and ownership requirements in both the height ex-tended and height retracted configurations.3.4.1 We
36、ightThe Type IV CBC, including its heightadjustment devise, but not its hardware/adapter kit, shall weighno more than 800 lb.3.4.2 Personnel DoorThe Type IV CBC shall beequipped with a vertically hinged single personnel door,centrally located in the rear wall. The door opening shall be aminimum of 4
37、8.00 in. wide by 60.00 in. high in the heightE2518 112extended configuration and shall be a minimum of 48.00 in.wide by 24.00 in. high in its height retracted configuration. Thepersonnel door shall swing to the outside. The personnel doorsfully opened position shall be at least 135 degrees from itsc
38、losed position.Adoor stop, for securing the personnel door inits fully opened position, shall be provided. In its closedposition the personnel door shall prevent the intrusion of drivenrain and dust and shall provide blackout protection.3.4.2.1 Door HandleThe personnel door shall beequipped with a d
39、oor handle that provides positive closure.From either side, the door handle shall be capable of beingmoved to its opened or closed position with a maximum forceof 30 lb applied to the door handle. The personnel door shall becapable of being padlocked from the outside securing the CBCfrom the exterio
40、r.3.4.2.2 Secondary ExitAsecondary exit shall be providedwithin the personnel door. The secondary exit opening shall bea minimum of 35.00 in. wide by 30.00 in. high. The secondaryexit shall be capable of being opened with a maximum force of30 lb applied to the release mechanism from inside of the CB
41、Cwith: (1) the tailgate closed and the personnel door locked (2)the tailgate closed and the personnel door unlocked and (3) thetailgate open and the personnel door locked. With the person-nel door locked, the secondary exit shall not be capable ofbeing opened from outside the CBC. The secondary exit
42、 shallprovide unobstructed egress for military personnel. This re-quirement shall apply to the Type IV CBC in the heightextended configuration only.3.4.3 LadderA ladder shall be provided to allow militarypersonnel to safely enter and exit the CBC/carrier combinationutilizing the CBCs Personnel Door.
43、 The ladder shall becapable of supporting at least 400 lb applied to any individualstep without damage or degradation to either the CBC, carrieror ladder. The CBC shall have a stowage location for the laddercapable of securely retaining the ladder in all transportationmodes without impeding any oper
44、ations of the CBC or itscarrier. The M1083 and M1095 carriers applicable to the TypeIV CBC are equipped with a ladder.3.4.4 Roof Access Handholds/FootholdsRoof accesshandholds/footholds shall be provided for safe access from theground to and descend from the roof when the CBC is mountedon its carrie
45、r. The roof access handholds/footholds shall eitherbe built into the CBC or attached to the exterior. The roofaccess handholds/footholds shall be designed such that theCBC/carrier combination does not: (1) exceed the legal high-way size limitations imposed by states and foreign countriesand (2) limi
46、t any other modes of transportation (for example,rail, air, ship). The roof access handholds/footholds shall bedesigned for the 5th percentile female through the 95thpercentile male military personnel. Each roof access handhold/footholds shall be capable of supporting 400 lb without damageor degrada
47、tion to either the CBC or the roof access step/handhold.3.4.5 Power and Signal Entry PortsTwo ports shall beprovided in the side walls as forward as practicable to permitthe pass through of power and signal lines into the CBCenclosed area when the CBC is in its height extended configu-ration. One po
48、rt shall be located on the drivers side and theother port shall be located on the passengers side. Each portshall be a minimum of 4 in. in diameter and not allow theintrusion of driven rain and dust into the CBC and haveprovisions for blackout. The power and signal access portsshall have provisions
49、for blackout.3.4.6 TransportabilityThe CBC/carrier combination shallbe capable of obtaining transportability approval from theMilitary Traffic Management Command transportability Engi-neering Agency (MTMCTEA) based on the requirements fortransport in the following modes:3.4.6.1 RailThe CBC/carrier combination with payloadshall: (1) meet the Gabarit International de Chargement (GIC)equipment gauge envelope as defined in interface standardMIL-STD-1366, and (2) be capable of withstanding multiplerail impacts without damage or degradation to eith
