ASTM E2518-19

Standard Specification for Cargo Bed Cover, Type IV (M923, 5 Ton Cargo Truck/M1083, 5 Ton Medium Tactical Vehicle (MTV)/M1082, 5 Ton MTV Trailer)

ABSTRACT
This specification covers the general requirements for the Type IV Cargo Bed Cover (CBC). The Type IV Cargo Bed Cover is a removable general purpose rigid enclosure for the cargo bed of the M923, 5 Ton Cargo Truck/M1083, 5 Ton Medium Tactical Vehicle (MTV)/M1095, 5 Ton MTV Trailer. The CBC provides environmental protection and security for mission equipment and items of general transport. Materials shall be tested and shall conform to the general requirements such as first article, conformance, operating requirements, support and ownership requirements, environmental requirements, and interface and operability requirements.
SCOPE
1.1 This specification covers the general requirements for the Type IV Cargo Bed Cover (CBC). The Type IV CBC is a removable general purpose rigid wall enclosure that is mounted to the following model 5 ton cargo trucks: (1) the M923 Medium Tactical Vehicle (MTV) and (2) the M1083 MTV. It also can be mounted on the M1095 5 Ton MTV Trailer. The CBC provides environmental protection and security for mission equipment and items of general transport.  
1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.  
1.3 The following safety hazards caveat pertains only to the test required portion, Section 5, of this specification: This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory requirements prior to use.  
1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

General Information

• Status: Published
• Publication Date: 30-Jun-2019
• ICS: 43.080.10 - Trucks and trailers
• Technical Committee: E06 - Performance of Buildings
• Drafting Committee: E06.53 - Materials and Processes for Durable Rigidwall Relocatable Structures

Relations

• Replaces: ASTM E2518-11 - Standard Specification for Cargo Bed Cover, Type IV (M923, 5 Ton Cargo Truck/M1083, 5 Ton Medium Tactical Vehicle (MTV)/ M1082, 5 Ton MTV Trailer)
• Effective Date: 01-Jul-2019
• Refers: ASTM E1749-18 - Standard Terminology Relating to Rigid Wall Relocatable Shelters
• Effective Date: 01-Oct-2018
• Refers: ASTM E1925-18 - Specification for Engineering and Design Criteria for Rigid Wall Relocatable Structures
• Effective Date: 01-Oct-2018
• Refers: ASTM E631-15 - Standard Terminology of Building Constructions
• Effective Date: 01-Mar-2015
• Refers: ASTM E631-14 - Standard Terminology of Building Constructions
• Effective Date: 01-Nov-2014
• Refers: ASTM E1749-10 - Standard Terminology Relating to Rigid Wall Relocatable Shelters
• Effective Date: 01-Nov-2010
• Refers: ASTM E1925-10 - Specifiction for Engineering and Design Criteria for Rigid Wall Relocatable Structures
• Effective Date: 01-Oct-2010
• Refers: ASTM E631-06 - Standard Terminology of Building Constructions
• Effective Date: 01-Jun-2006
• Refers: ASTM E1749-05 - Standard Terminology Relating to Rigid Wall Relocatable Shelters
• Effective Date: 01-Oct-2005
• Refers: ASTM E1925-04 - Specifiction for Engineering and Design Criteria for Rigid Wall Relocatable Structures
• Effective Date: 01-Oct-2004
• Refers: ASTM E1925-99 - Specifiction for Engineering and Design Criteria for Rigid Wall Relocatable Structures
• Effective Date: 10-Apr-2001
• Refers: ASTM E1925-01 - Specifiction for Engineering and Design Criteria for Rigid Wall Relocatable Structures
• Effective Date: 10-Apr-2001
• Refers: ASTM E631-93a(1998)e1 - Standard Terminology of Building Constructions
• Effective Date: 28-Jul-2000
• Refers: ASTM E1749-00 - Standard Terminology Relating to Rigid Wall Relocatable Shelters
• Effective Date: 10-Apr-2000

Overview

ASTM E2518-19, published by ASTM International, establishes the general requirements for the Type IV Cargo Bed Cover (CBC). This removable rigid enclosure is designed to provide environmental protection and security for cargo and mission equipment transported by military vehicles, specifically the M923 (5 Ton Cargo Truck), M1083 (5 Ton Medium Tactical Vehicle, MTV), and M1095 (5 Ton MTV Trailer). The standard ensures that the Type IV CBC meets stringent operational, safety, and environmental requirements critical for military and tactical logistics operations.

This specification is recognized for supporting both domestic and international defense operations by delivering robust, secure, and multi-modal transport solutions.

Key Topics

• General Requirements: Defines CBC as a removable, rigid, general-purpose enclosure for key military vehicles, offering both an “extended” and “retracted” height configuration.
• Operational Performance: Covers service life (minimum 15 years), manual height adjustment by two personnel, payload support, roof and personnel door strength, blackout protection, and maintainability.
• Safety & Health: Addresses personnel protection, edge rounding, non-use of carcinogenic substances, and ventilation requirements, including suffocation hazard warnings.
• Environmental Resistance: Specifies tolerance to humidity, salt spray, ice, temperature extremes, UV exposure, fungus, blowing sand/dust, and water intrusion.
• Transportability: Ensures compatibility with rail, fixed-wing air, helicopter sling load, and ground transport as required by various military logistics profiles.
• Installation & Adaptability: Details requirements for mounting hardware, minimal vehicle modifications, commonality of adapter kits, and restriction on special tools.
• Finish and Identification: Requires non-skid surfaces, prescribed color schemes (camouflage pattern for exterior, semi-gloss white for interior), chemical agent resistant coatings (CARC), and accessible marking of key data.

Applications

The ASTM E2518-19 standard is essential for:

• Military Procurement and Maintenance: Ensures the CBC is reliable, safe, and adaptable for mission-critical military vehicles and trailers, reducing lifecycle and logistics costs.
• Vehicle Fleet Operations: Provides solutions for cargo protection and environmental shielding during transit in extreme conditions, maximizing operational readiness.
• Defense Engineering & Manufacturing: Guides manufacturers in producing compliant CBCs that seamlessly integrate with legacy and current tactical transport vehicles.
• Field Operations: Guarantees rapid deployment via efficient mounting/dismounting, tool compatibility, labelling, and ease of entering/leaving the enclosure under various operational scenarios.
• Interoperability and International Defense Logistics: Supports multi-national coalition operations by adhering to internationally recognized transport and safety standards.

Related Standards

Organizations and professionals using ASTM E2518-19 should also consider the following referenced and related standards:

• ASTM E631: Terminology for Building Constructions
• ASTM E1749: Terminology Relating to Rigid Wall Relocatable Shelters
• ASTM E1925: Specification for Engineering and Design Criteria for Rigid Wall Relocatable Structures
• FED-STD-595: Colors Used in Government Procurement
• MIL-STD-209: Slinging and Tiedown Provisions for Military Equipment
• MIL-STD-810: Environmental Testing Methods and Guidelines
• MIL-STD-1366: Transportability Criteria
• MIL-STD-1472: Human Engineering Design Criteria
• MIL-DTL-53039/53072: Chemical Agent Resistant Coating (CARC) Materials and Application Procedures
• OSHA 29 CFR 1910: Occupational Safety and Health Standards
• ACGIH TLVs: Threshold Limit Values for chemical exposure

Conclusion

Adhering to ASTM E2518-19 is vital for any organization involved in the design, production, procurement, or use of military cargo bed covers for 5 Ton tactical vehicles and trailers. Compliance ensures operational flexibility, cargo security, regulatory conformity, and global interoperability, contributing significantly to military logistics efficiency and mission success.

Standards Content (Sample)

This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: E2518 −19
Standard Specification for
Cargo Bed Cover, Type IV (M923, 5 Ton Cargo Truck/M1083,
5 Ton Medium Tactical Vehicle (MTV)/M1082, 5 Ton MTV
Trailer)
This standard is issued under the fixed designation E2518; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope E1749Terminology Relating to Rigid Wall Relocatable
Shelters
1.1 This specification covers the general requirements for
E1925Specification for Engineering and Design Criteria for
the Type IV Cargo Bed Cover (CBC). The Type IV CBC is a
Rigid Wall Relocatable Structures
removablegeneralpurposerigidwallenclosurethatismounted
F501Test Method for Aerospace Materials Response to
to the following model 5 ton cargo trucks: (1) the M923
Flame, with Vertical Test Specimen (for Aerospace Ve-
Medium Tactical Vehicle (MTV) and (2) the M1083 MTV. It
hicles Standard Conditions) (Withdrawn 1998)
also can be mounted on the M1095 5 Ton MTV Trailer. The
CBC provides environmental protection and security for mis-
2.2 Federal Standard:
sion equipment and items of general transport.
FED-STD-595Colors Used in Government Procurement
1.2 The values stated in inch-pound units are to be regarded 4
2.3 Military Standards:
as standard. The values given in parentheses are mathematical
MIL-STD-209Interface Standard for Lifting and Tiedown
conversions to SI units that are provided for information only
Provisions
and are not considered standard.
MIL-STD-810Environmental Engineering Considerations
1.3 The following safety hazards caveat pertains only to the
and Laboratory Tests
test required portion, Section 5, of this specification: This
MIL-STD-1366Transportability Criteria
standard does not purport to address all of the safety concerns,
MIL-STD-1472Design Criteria: Human Engineering
if any, associated with its use. It is the responsibility of the user
MIL-DTL-53039Coating, Aliphatic Polyurethane, Single
of this standard to establish appropriate safety, health, and
Component, Chemical Agent Resistant
environmental practices and determine the applicability of
MIL-DTL-53072 Chemical Agent Resistant Coating
regulatory requirements prior to use.
(CARC)SystemApplicationProceduresandQualityCon-
1.4 This international standard was developed in accor-
trol Inspection
dance with internationally recognized principles on standard-
2.4 Military Handbooks:
ization established in the Decision on Principles for the
MIL-HDBK-759Human Engineering Design Guidelines
Development of International Standards, Guides and Recom-
MIL-HDBK-1791Designing for Internal Aerial Delivery in
mendations issued by the World Trade Organization Technical
Fixed Winged Aircraft
Barriers to Trade (TBT) Committee.
2.5 OSHA Document:
2. Referenced Documents
Title 29 CFR 1910Occupational Safety and Health Stan-
2.1 ASTM Standards: dards
E631Terminology of Building Constructions 6
2.6 ACGIH Document:
ACGIHThreshold Limit Values
This specification is under the jurisdiction of ASTM Committee E06 on
Performance of Buildings and is the direct responsibility of Subcommittee E06.53
on Materials and Processes for Durable Rigidwall Relocatable Structures. The last approved version of this historical standard is referenced on
Current edition approved July 1, 2019. Published August 2019. Originally www.astm.org.
approved in 2006. Last previous edition approved in 2011 as E2518–11. DOI: Available from DLA Document Services, Building 4/D, 700 Robbins Ave.,
10.1520/E2518–19. Philadelphia, PA 19111-5094, http://quicksearch.dla.mil.
2 5
For referenced ASTM standards, visit the ASTM website, www.astm.org, or Available from Occupational Safety and Health Administration (OSHA), 200
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Constitution Ave., NW, Washington, DC 20210, http://www.osha.gov.
Standards volume information, refer to the standard’s Document Summary page on Available from American Conference of Governmental Industrial Hygienists
the ASTM website. (ACGIH),1330KemperMeadowDr.,Cincinnati,OH45240,http://www.acgih.org.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
E2518 − 19
3. Terminology personnel safety hazard or caused equipment damage during
operation and maintenance shall be rounded or suitably pro-
3.1 Definitions—For definitions of general terms related to
tected.
building construction used in this specification, refer to Termi-
4.3.5 Toxicity:
nology E631, and for general terms related to rigid wall
4.3.5.1 Materials—Certain chemicals have been identified
relocatable shelters, refer to Terminology E1749.
inTitle29CFR1910ascancer-producingsubstances(carcino-
gens). Materials used in the CBC shall not contain these
4. General Requirements
chemicals. Consideration of the human toxicity of a substance
4.1 First Article—When specified (see 7.2), a sample shall
should be given prior to material selection.
besubjectedtofirstarticleinspectioninaccordancewith5.1.1.
4.3.5.2 Gases or Vapors—The materials, as installed in the
A first article is defined as a pre-production or an initial
equipment and under service conditions specified in the equip-
production sample consisting of one or more of each type of
ment specification, shall not liberate noxious odors, toxic or
completed CBC.
corrosive gases, or vapors that would be detrimental to the
4.2 Conformance—Items furnished under this specification
health of personnel.
shall be subjected to conformance inspection in accordance
4.3.6 Vents—The CBC shall include two vents for fresh air
with 5.1.2.
ventilation.Theventsshallbelocatedtofacilitatefreshairflow
through the cargo area. The vents shall prevent intrusion of
4.3 Operating Requirements—Unless otherwise specified,
driven rain and have provisions for blackout. Vents shall be
the Type IV CBC shall meet the following operating require-
capable of providing ventilation when the vehicle is both
ments in both the height extended and height retracted con-
stationary and on the move. Vents requiring operation shall be
figurations.
capable of being operated manually.The interior surface of the
4.3.1 Configurations—The Type IV CBC shall have two
door shall have a warning in at least 1 ⁄2 in. high letters
configurations, height extended and height retracted. The
contrasting the color of the door. The warning shall say
height extended configuration is the normal operating configu-
“Warning—Suffocation hazard, door must remain open while
ration for the CBC and provides for maximum usable volume.
occupied.” This requirement shall apply to the Type IV CBCs
The height retracted configuration provides less usable volume
in the height extended configuration only.
butiscapableofbeingloadedontheC-130andC-141Military
4.3.7 Roof Loads—The CBC roof shall be capable of
Airlift Command (MAC) fixed wing aircraft. Unless otherwise
supporting, without structural damage, degradation or perma-
specified, the CBC shall meet all the requirements of this
nent deformation: (1) a uniformly distributed load of 40lb⁄ft
specification sheet in both the height extended and height
over the entire surface and (2) a concentrated load of 660lb
retracted configurations.
over a 1by 2ft area applied anywhere on the roof.
4.3.2 Height Adjustment Device—In both its payloaded (see
4.3.8 Interior Payload Provisions—The CBC shall be ca-
4.3.8) and non-payloaded configurations the Type IV CBC
pable of accepting threaded fasteners such as rivnuts and
shall be capable of being manually extended from its retracted
inserts for mounting equipment to the interior of the CBC.The
configuration and vise versa by two soldiers in 20 min using
Type IV CBC and its Interior Payload Provisions shall be
onlythetoolsoftheBasicIssueItems(BII)andtheAdditional
capable of supporting at least 1100 lb of payload during its
Authorization List (AAL) as described in the carrier’s Opera-
stationary, rail transport, ground mobility and crane lifting
tor’s Manual, and tools supplied with the CBC.Any hardware
operation modes without damage or degradation to either the
orspecialtoolsrequiredforextending/retractingtheCBCshall
CBC or its interior payload provisions. The payload shall be
be provided as part of the CBC.Additional materials handling
attached to the interior surfaces using interior payload provi-
equipment shall not be required. The CBC shall be capable of
sions and shall be distributed as follows: 200 lb mounted to
multiple extension/retraction cycles, in accordance with its
eachofthefourwallsurfaces,or400lbmountedtoeachofthe
manual, without damage or degradation to either the CBC, its
two side wall surfaces, and 300 lb mounted to the ceiling.
carrier, or its height adjustment devise.
4.3.9 Personnel Door Loads:
4.3.3 CBC Service Life, Reliability, and Maintainability—
The service life for the CBC shall be at least 15 years. The 4.3.9.1 Personnel Door Structure—The personnel door, in-
cluding its frame(s) and hardware, shall be capable of support-
meantimetorepairattheorganizationalandintermediatelevel
shall not exceed 4 hours at the 90th percentile. Gaskets, seals, inga200lbstaticloadwithoutdamageordegradationtoeither
theCBCoritspersonneldoor,frame(s)andhardware.Theload
flaps,andothermaterialsshallbefixedtotheCBCandshallbe
replaceable. shall be applied parallel to the hinge line, along the door edge
oppositethehinge,withthepersonneldooropento90degrees.
4.3.4 Personnel Hazards:
The personnel door shall operate freely after application of the
4.3.4.1 Mechanical—The CBC shall conform to regulatory
load.
and consensus design safety standards, unless military appli-
cations require more stringent limits, and reflect applicable 4.3.9.2 Door Stop—The personnel door, including its
frame(s) and hardware, shall withstand a wind gust of 60 mph
system and personnel safety factors. The CBC shall provide
personnel maximum access and safety while installing, in any direction when the door is secured by its door stop.
operating, and maintaining the equipment. 4.3.10 Surface Impact Resistance—The exterior surface of
4.3.4.2 Edge Rounding—All exposed edges and corners the CBC’s roof shall be capable of withstanding a blow from a
shall be rounded. Sharp edges and corners that can present a 30lbsteelcylinder,3in.indiameterwithahemisphericalend,
E2518 − 19
droppedfromaheightof30in.,withoutstructuraldegradation. carrier. The M1083 and M1095 carriers applicable to the Type
All other exterior wall surfaces shall be capable of withstand- IV CBC are equipped with a ladder.
ingablowfromthesamesteelcylinder,droppedfromaheight
4.4.4 Roof Access Handholds/Footholds—Roof access
of 16 in., without structural degradation.
handholds/footholds shall be provided for safe access from the
4.3.11 Tailgate Operation—The CBC, when mounted on its
groundtoanddescendfromtheroofwhentheCBCismounted
carrier, shall not inhibit operation of the carrier’s tailgate.
on its carrier. The roof access handholds/footholds shall either
4.3.12 Blackout—The CBC/carrier combination, with the
be built into the CBC or attached to the exterior. The roof
personneldoorandportsclosed,shallnotpermitalightsource
access handholds/footholds shall be designed such that the
from within to emit detectable amounts of light. This require-
CBC/carrier combination does not: (1) exceed the legal high-
ment shall apply to the Type IV CBCs in the height extended
way size limitations imposed by states and foreign countries
configuration only.
and (2) limit any other modes of transportation (for example,
4.4 Support and Ownership Requirements—Unless other- rail, air, ship). The roof access handholds/footholds shall be
wise specified, the Type IV CBC shall meet the following
designed for the 5th percentile female through the 95th
support and ownership requirements in both the height ex-
percentilemalemilitarypersonnel.Eachroofaccesshandhold/
tended and height retracted configurations.
footholdsshallbecapableofsupporting400lbwithoutdamage
4.4.1 Weight—The Type IV CBC, including its height ad-
or degradation to either the CBC or the roof access step/
justment devise, but not its hardware/adapter kit, shall weigh
handhold.
no more than 800 lb.
4.4.5 Power and Signal Entry Ports—Two ports shall be
4.4.2 Personnel Door—TheTypeIVCBCshallbeequipped
provided in the side walls as forward as practicable to permit
withaverticallyhingedsinglepersonneldoor,centrallylocated
the pass through of power and signal lines into the CBC
intherearwall.Thedooropeningshallbeaminimumof48.00
enclosed area when the CBC is in its height extended configu-
in. wide by 60.00 in. high in the height extended configuration
ration. One port shall be located on the driver’s side and the
and shall be a minimum of 48.00 in. wide by 24.00 in. high in
other port shall be located on the passenger’s side. Each port
its height retracted configuration. The personnel door shall
shall be a minimum of 4 in. in diameter and not allow the
swing to the outside. The personnel door’s fully opened
intrusion of driven rain and dust into the CBC and have
position shall be at least 135 degrees from its closed position.
provisions for blackout. The power and signal access ports
Adoorstop,forsecuringthepersonneldoorinitsfullyopened
shall have provisions for blackout.
position, shall be provided. In its closed position the personnel
4.4.6 Transportability—The CBC/carrier combination shall
door shall prevent the intrusion of driven rain and dust and
be capable of obtaining transportability approval from the
shall provide blackout protection.
Military Traffic Management Command transportability Engi-
4.4.2.1 Door Handle—The personnel door shall be
neering Agency (MTMCTEA) based on the requirements for
equipped with a door handle that provides positive closure.
transport in the following modes:
From either side, the door handle shall be capable of being
moved to its opened or closed position with a maximum force 4.4.6.1 Rail—The CBC/carrier combination with payload
of30lbappliedtothedoorhandle.Thepersonneldoorshallbe shall: (1) meet the Gabarit International de Chargement (GIC)
capableofbeingpadlockedfromtheoutsidesecuringtheCBC
equipment gauge envelope as defined in interface standard
from the exterior.
MIL-STD-1366, and (2) be capable of withstanding multiple
4.4.2.2 Secondary Exit—Asecondary exit shall be provided rail impacts without damage or degradation to either the CBC
within the personnel door.The secondary exit opening shall be
or its carrier and without damage to the tiedown cables, or
a minimum of 35.00 in. wide by 30.00 in. high.The secondary
blocking or bracing.
exitshallbecapableofbeingopenedwithamaximumforceof
4.4.6.2 Fixed Wing—The CBC/carrier combination shall be
30lbappliedtothereleasemechanismfrominsideoftheCBC
transportable in C-130 and larger Air Mobility Command
with: (1) the tailgate closed and the personnel door locked (2)
(AMC) aircraft. The combination shall also be capable of
the tailgate closed and the personnel door unlocked and (3) the
roll-on/roll-off loading at ramp angles of 15 degrees on the
tailgate open and the personnel door locked. With the person-
C-130 and larger AMC aircraft without special handling
nel door locked, the secondary exit shall not be capable of
procedures or equipment. The Type IV CBCs shall be capable
being opened from outside the CBC. The secondary exit shall
of roll-on/roll-off loading on the C-130 and C-141 AMC
provide unobstructed egress for military personnel. This re-
aircraft in the height retracted configuration only.
quirement shall apply to the Type IV CBC in the height
4.4.6.3 Helicopter Sling Load (HSL)—The Type IV CBC
extended configuration only.
mountedonitscarrier,inallitspayloadconfigurations,shallbe
4.4.3 Ladder—A ladder shall be provided to allow military
capable of helicopter sling transport by CH-47 or larger rotary
personnel to safely enter and exit the CBC/carrier combination
wingaircraftinthedualpointconfigurationwithoutdamageor
utilizing the CBC’s Personnel Door. The ladder shall be
degradationtoeithertheTypeIVCBCorthecarrierasaresult
capable of supporting at least 400 lb applied to any individual
of being flown.
step without damage or degradation to either the CBC, carrier
orladder.TheCBCshallhaveastowagelocationfortheladder 4.4.6.4 Ground Mobility—The CBC/carrier combination
shall be capable of meeting the same mission profile and miles
capable of securely retaining the ladder in all transportation
modes without impeding any operations of the CBC or its as the carrier when driven over road courses as defined by
E2518 − 19
Perryman, Churchville, and Munson courses found at Ab- shall be made to the vehicle’s frame. Any proposed modifica-
erdeen Proving Ground, Maryland, without damage or degra- tion(s)madetotheM923mustbesubmittedtothegovernment
dation to either the CBC or its carrier. The CBC/carrier for approval prior to incorporation into the design. Only
combination shall meet U.S. and NATO countries’ highway modifications capable of being made in the field with hand
legal limits. tools or small power tools (that is, installation of rivnuts,
drilled or punched holes) shall be considered. Only modifica-
4.4.6.5 LiftingProvisions—TheCBCshallbeequippedwith
tionswhichpermitmultiplemountinganddismountingshallbe
lift provisions to enable it, with its payload, to be lifted on and
offitscarrierwithoutdamageordegradationtoeithertheCBC considered.
(2) M1083 and M1095 Modifications—The Type IV CBC
oritsliftprovisions.TheCBC’sliftprovisionsshallconformto
thecraneliftrequirementsofinterfacestandardMIL-STD-209. shall be capable of being mounted to the M1083 and M1095
using the existing mounting regions of the carriers. No modi-
4.4.7 Finish:
ficationsshallbemadetothesecarriers.TheD-ringsinthebed
4.4.7.1 Non-Skid Surfaces—All horizontal surfaces of the
ofthecarriershallnotbecovered,norshalltheoperationofthe
CBC (such as, interior floor (if applicable) and exterior roof)
D-ring be limited.
shall be non-skid.
4.4.11.3 Hardware/Adapter Kits—The CBC shall have pro-
4.4.7.2 Interior Color—The color of the interior walls and
visions to mount it to any of the carriers listed in 4.4.11.2(1).
ceiling of the CBC shall be semi-gloss white (see 7.4).
These provisions may include separate hardware or adapters
4.4.7.3 Exterior Color—Unless otherwise specified in the
for each type carrier. The hardware/adapter kits shall have as
contract (see 7.2), the exterior color of the CBC shall be in
much commonality as practicable. The hardware/adapters kits
accordance with a three-color camouflage pattern. The pattern
shallbeorderedseparatelyfromtheCBC.Thekitsshallnotbe
shall be generated by the government and supplied to the
part of the CBC weight but shall weigh no more than 200 lb.
contractor (see 7.4.1). The interior surface of the personnel
A ladder meeting the requirements of 4.4.3 shall be provided
door and secondary exit shall match the primary exterior color
for the M923 hardware/adapter kit only. The M1083 and
of the CBC.
M1095 carriers come with a ladder, and therefore do not
4.4.8 Chemical Agent Resistance—All exterior surfaces,
require a ladder.
except weather seals and gaskets, shall be Chemical Agent
4.4.11.4 Installation Tools—The Type IV CBC using the
ResistantCoated(CARC)inaccordancewithMIL-DTL-53072
appropriate carrier hardware/adapter kit shall be capable of
using MIL-DTL-53039 chemical agent resistant coatings. All
being attached to, and detached from, the carrier using only
interior surfaces, except weather seals and gaskets, shall be
those tools of the Basic Issue Items (BII) and the Additional
ChemicalAgent Resistant Coated (CARC) in accordance with
Authorization List (AAL) as described in the carrier’s opera-
MIL-DTL-53072 chemical agent resistant coating. Weather
tor’s manual.
seals shall be resistant to chemical and biological agent
4.4.11.5 Interference—The Type IV CBC shall not obstruct
contamination, decontamination fluids and petroleum products
or interfere with the installation, removal, or operation of the
or be replaceable at the unit level.
carrier’s components (such as, reflectors, brake/tail lights, rear
4.4.9 Special Tools—No special tools or equipment shall be
antenna mounts or D-rings).
required to mount, dismount or operate the CBC.TheType IV
4.4.12 Identification—The exterior endwall at the door end
CBC may have a height adjustment devise which includes
of each CBC shall be permanently marked to identify the item
special tools or equipment (see 4.3.2).
nomenclature, including CBC type, manufacturer, contract
4.4.10 Mounting—The CBC shall be capable of multiple
number, national stock number, tare weight and serial number.
mounting and dismounting cycles from its carrier, in accor-
This information shall be visible, by personnel standing on the
dancewithitsmanual,withoutdamageordegradationtoeither
ground, with the CBC either mounted or dismounted from its
the CBC, its carrier or its mounting provisions and hardware.
carrier.
These hardware/adapter kits shall allow the Type IV CBCs to
mount to their respective carriers, and shall be ordered sepa-
4.5 Environmental Requirements—Unless otherwise
rately (see 7.2). With the CBC mounted to the carrier, the specified, the Type IV CBCs shall meet the following Envi-
D-rings in the bed of the carrier shall not be covered, nor shall
ronmental requirements in both the height extended and height
the operation of the D-ring be limited. retracted configurations.
4.4.11 Carrier Interface: 4.5.1 Humidity Resistance—The CBC shall be capable of
4.4.11.1 Carrier Series—Using applicable adapters (see withstanding daily exposure of up to 97% relative humidity
for 20 h and exposure of 100% relative humidity (with
4.4.10) the Type IV CBC shall be capable of mounting to, and
allowing full operation of, the following carriers: condensation) for 4 h without evidence of corrosion, structural
damage, degradation or permanent deformation.
(1)M923, 5 Ton Cargo Truck,
(2)M1083, 5 Ton Medium Tactical Vehicle (MTV), and 4.5.2 Marine Atmosphere (Sea-Salt Fallout)—The CBC,
(3)M1095, 5 Ton MTV Trailer. when exposed to a marine environment sea salt fallout rate
equivalent to 25 lb per acre per year (2.0g⁄m /yr), shall not
4.4.11.2 Carrier Modifications:
corrode or degrade.
(1) M923 Modifications—Installation of the Type IV CBC
shall utilize the M923’s existing mounting regions to the 4.5.3 Ice—The CBC including its door(s), vents and cable
maximum extent possible. Modifications to the M923, such as ports shall be capable of withstanding and remaining opera-
drilled holes, shall be kept to a minimum. No modifications tional while the CBC is exposed to the forces and effects due
E2518 − 19
to the accumulation of 0.25in. (6mm) of ice produced by (2)Conformance inspection (see 5.1.2).
freezing rain, mist, or sea spray. 5.1.1 First Article Inspection—When a first article inspec-
4.5.4 Temperature Range—The CBC shall be capable of tion is required (see 4.1 and 7.2), the CBC shall undergo the
withstanding temperatures ranges of −60 to 160°F in storage tests and examinations outlined in Table 1. Sampling for the
and transit and −60 to 120°F plus solar load for normal first article inspection shall be as specified in the contract or
operations. The CBC, including fasteners, seals or other purchase order.
hardware, shall show no evidence of corrosion or degradation. 5.1.2 Conformance Inspection—When a conformance in-
4.5.5 Temperature Shock—The CBC shall withstand a tem- spection is required (see 7.2) specific inspections to be per-
perature shock from an equilibrium state of 160 to −70°F formed shall be defined by the contract (see 7.2) and shall
within 5 min and from an equilibrium state of −70 to 160°F include any verification contained herein.
within 5 min without evidence of structural damage,
TABLE 1 Sequence of First Article Verifications
degradation, or permanent deformation.
4.5.6 Blowing Sand and Dust—TheCBC,whenmountedon
Requirement Verification
Verification
Paragraph Paragraph
its carrier, shall resist the effects of blowing sand and dust
Configurations 4.3.1 5.3.1
without damage or degradation. The CBC shall remain fully
Height adjustment device 4.3.2 5.3.2
operational with no more than 16.80in. (0.50pt) of sand
CBC service life, reliability, and
4.3.3 5.3.3
penetration into the interior of the CBC. Blowing sand is
maintainability
Personnel hazards 4.3.4 5.3.4
defined as 150–1000micron particles in concentrations of
Mechanical 4.3.4.1 5.3.4.1
-4 3
1.32×10 lb⁄ft with a wind speed of 1750ft⁄min.
Edge rounding 4.3.4.2 5.3.4.2
4.5.7 Ultraviolet Effects—The CBC shall show no evidence Toxicity 4.3.5 5.3.5
Materials 4.3.5.1 5.3.5.1
ofstructuraldamage,degradationorpermanentdeformationas
Gases or vapors 4.3.5.2 5.3.5.2
a result of exposure to ultraviolet effects.
Vents 4.3.6 5.3.6
4.5.8 Fire Resistance—The CBC shall be non-burning or Roof loads 4.3.7 5.3.7
Interior payload provisions 4.3.8 5.3.8
self-extinguishing (that is, have a flame time of less than 30 s)
Personnel doors 4.3.9 5.3.9
after removal of a flame.
Personnel door structure 4.3.9.1 5.3.9.1
Door stop 4.3.9.2 5.3.9.2
4.5.9 Fungus—The CBC shall be impervious to fungus
Surface impact resistance 4.3.10 5.3.10
growth.Materialsshallbeselectedtominimizefungusgrowth.
Tailgate operation 4.3.11 5.3.11
4.5.10 Watertightness—The CBC, when mounted on its
Blackout 4.3.12 5.3.12
carrier, without the aide of supplementary sealing, caulking, Support and ownership
4.4 5.4
requirements
taping or other means, shall be capable of withstanding a 40
Weight 4.4.1 5.4.1
psig spray from nozzles located 19 in. from, and normal to,
Personnel door 4.4.2 5.4.2
Door handle 4.4.2.1 5.4.2.1
eachexternalCBCsurface.TheCBCshallnotallowmorethan
Secondary exit 4.4.2.2 5.4.2.2
8 fluid oz. of water into the interior of the CBC in a 40 min
Ladder 4.4.3 5.4.3
period and the weight of the CBC shall not increase by more
Roof access step/handholds 4.4.4 5.4.4
Power and signal access ports 4.4.5 5.4.5
than 1.00 lb.
Transportability 4.4.6 5.4.6
4.6 Interface and Operability Requirements—Unless other- Rail 4.4.6.1 5.4.6.1
Fixed wing 4.4.6.2 5.4.6.2
wise specified, the Type IV CBCs shall meet the following
Helicopter sling lift (HSL) 4.4.6.3 5.4.6.3
interface and operability requirements in both the height
Ground mobility 4.4.6.4 5.4.6.4
extended and height retracted configurations. Lifting provisions 4.4.6.5 5.4.6.5
Finish 4.4.7 5.4.7
4.6.1 Interchangeability—The spare parts of the CBC pro-
Non-skid surfaces 4.4.7.1 5.4.7.1
duced under this specification shall be functionally and dimen-
Interior color 4.4.7.2 5.4.7.2
sionally interchangeable without modification or rework of the Exterior color 4.4.7.3 5.4.7.3
Chemical agent resistance 4.4.8 5.4.8
part or assembly.
Special tool 4.4.9 5.4.9
4.6.2 Size—TheType IVCBC shall enclose the cargo (rear)
Carrier interface 4.4.11 5.4.11
portion of the carrier to provide the maximum volume practi- Identification 4.4.12 5.4.12
Environmental requirements 4.5 5.5
cable for its configuration.
Humidity resistance 4.5.1 5.5.1
4.6.2.1 Interior Width, Length, and Height—The interior
Marine atmosphere 4.5.2 5.5.2
Ice 4.5.3 5.5.3
dimensionsoftheTypeIVCBCshallbenolessthan140.00in.
Temperature range 4.5.4 5.5.4
long by 77.0 in. wide by 72.00 in. high in its height extended
Temperature shock 4.5.5 5.5.5
configuration and shall be no less than 140.00 in. long by 77.0
Blowing sand and dust 4.5.6 5.5.6
Ultraviolet effects 4.5.7 5.5.7
in.wideby30.00in.highinitsstowedconfiguration.TheCBC
Fire resistance 4.5.8 5.5.8
shall not interfere, cover or limit the operation of the D-Rings
Fungus 4.5.9 5.5.9
located around the perimeter of the host vehicle cargo bed.
Watertightness 4.5.10 5.5.10
Interface and operability
4.6 5.6
requirements
5. Verification
Interchangeability 4.6.1 5.6.1
Size 4.6.2 4.6.2
5.1 Classification of Inspections—The inspection require-
Interior width, length, and height 4.6.2.1 4.6.2.1
ments specified herein are classified as follows:
Exterior width, length, and height 3.6.2.2 4.6.2.2
(1)First article inspection (see 5.1.1), and
E2518 − 19
5.2 Verification Methods—Verification methods can include 5.3.5.1 Materials—Certify that Material Safety Data Sheets
visual examination, measurement, testing, simulation, do not include chemicals identified in Title 29 CFR 1910 as
cancer-producing substances (carcinogens).
modeling, engineering evaluation, component properties
analysis, certification and similarity to previously approved or
5.3.5.2 Gases or Vapors—Demonstrate the CBC does not
previously qualified designs. Unless otherwise specified, the
produce toxic exposures exceeding OHSA permissible expo-
Type IV CBC’s requirements shall be verified in both the
sure limits, Title 29 CFR 1910 or ACGIH Threshold Limit
height extended and height retracted configurations.
Values for noxious odors, toxic or corrosive gases, or vapors
from materials used in the CBC’s construction. Failure to meet
5.2.1 VerificationAlternatives—Thecontractormaypropose
the requirements of 4.3.5.2 shall constitute failure of this test.
alternative test methods, techniques, or equipment, including
the application of statistical process control, tool control, or
5.3.6 Vents—The ventilation ports shall be inspected and
cost effective sampling procedures to verify performance. In
manually operated (if applicable) for compliance with 4.3.6.
the case of the Type IV CBC, the contractor may propose to
Failuretomeettherequirementsof4.3.6shallconstitutefailure
perform verifications in only one configuration (that is, ex-
of this test. The Type III CBC shall be verified in the height
tended or retracted) if it can be shown that this method will to
extended configuration only.
verify the requirement for both configurations.
5.3.7 Roof Loads—The CBC roof shall be subjected to a
uniformloadof40lb⁄ft overtheentiresurface.Afterremoval
5.3 Operating Requirements Verification
of the uniform load, a 660lb load shall be applied to the
5.3.1 Configurations—Unless otherwise specified, all veri-
weakest region of the roof over a 1by 2ft area. Each test shall
fications shall be performed in both the height extended and
be for duration of 5 min. Failure to meet the requirements of
height retracted configurations. Failure to meet the require-
4.3.7 shall constitute failure of this test.
ments of 4.3.1 shall constitute failure of this test.
5.3.8 Interior Payload Provisions—TheType III CBC, with
5.3.2 Height Adjustment Device—To verify the require-
the interior payload described in 4.3.8, sha
...

This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: E2518 − 11 E2518 − 19
Standard Specification for
Cargo Bed Cover, Type IV (M923, 5 Ton Cargo Truck/M1083,
5 Ton Medium Tactical Vehicle (MTV)/ M1082, (MTV)/M1082,
5 Ton MTV Trailer)
This standard is issued under the fixed designation E2518; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope
1.1 This specification covers the general requirements for the Type IV Cargo Bed Cover (CBC). The Type IV CBC is a
removable general purpose rigid wall enclosure that is mounted to the following model 5 ton cargo trucks: (1) the M923 Medium
Tactical Vehicle (MTV) and (2) the M1083 MTV. It also can be mounted on the M1095 5 Ton MTV Trailer. The CBC provides
environmental protection and security for mission equipment and items of general transport.
1.2 The values stated in inch-pound units are to be regarded as standard. No other units of measurement are included in this
The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not
considered standard.
1.3 The following safety hazards caveat pertains only to the test required portion, Section 45, of this specification: This This
standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user
of this standard to establish appropriate safety safety, health, and healthenvironmental practices and determine the applicability
of regulatory requirements prior to use.
1.4 This international standard was developed in accordance with internationally recognized principles on standardization
established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued
by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
2. Referenced Documents
2.1 ASTM Standards:
E631 Terminology of Building Constructions
E1749 Terminology Relating to Rigid Wall Relocatable Shelters
E1925 Specification for Engineering and Design Criteria for Rigid Wall Relocatable Structures
F501 Test Method for Aerospace Materials Response to Flame, with Vertical Test Specimen (for Aerospace Vehicles Standard
Conditions) (Withdrawn 1998)
2.2 Federal Standards:Standard:
FED-STD-595 Colors Used in Government Procurement
2.3 Military Standards:
MIL-STD-209 Slinging and Tiedown Provisions Interface Standard for Lifting and Tying Down Military EquipmentTiedown
Provisions
MIL-STD-810 Environmental Test Methods and Engineering GuidelinesEngineering Considerations and Laboratory Tests
MIL-STD-1366 Transportability Criteria
MIL-STD-1472 Design Criteria: Human Engineering
MIL-DTL-53039 Coating, Aliphatic Polyurethane, Single Component, Chemical Agent Resistant
This specification is under the jurisdiction of ASTM Committee E06 on Performance of Buildings and is the direct responsibility of Subcommittee E06.53 on Materials
and Processes for Durable Rigidwall Relocatable Structures.
Current edition approved Sept. 1, 2011July 1, 2019. Published October 2011August 2019. Originally approved in 2006. Last previous edition approved in 20062011 as
E2518 – 06.E2518–11. DOI: 10.1520/E2518-11.10.1520/E2518–19.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
The last approved version of this historical standard is referenced on www.astm.org.
Available from Standardization Documents Order Desk, DODSSP, Bldg. 4, Section D, DLA Document Services, Building 4/D, 700 Robbins Ave., Philadelphia, PA
19111-5098, http://www.dodssp.daps.mil.19111-5094, http://quicksearch.dla.mil.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
E2518 − 19
MIL-DTL-53072 Chemical Agent Resistant Coating (CARC) System Application Procedures and Quality Control Inspection
2.4 Military Handbooks:
MIL-HDBK-759 Human Engineering Design Guidelines
MIL-HDBK-1791 Designing for Internal Aerial Delivery in Fixed Winged Aircraft
2.5 OSHA Documents:Document:
Title 29 CFR 1910 Occupational Safety and Health Standards
2.6 ACGIH Documents:Document:
ACGIH Threshold Limit Values
3. Terminology
3.1 Definitions—For definitions of general terms related to building construction used in this specification, refer to Terminology
E631, and for general terms related to rigid wall relocatable shelters, refer to Terminology E1749.
4. General Requirements
4.1 First Article—When specified (see 6.27.2), a sample shall be subjected to first article inspection in accordance with
4.1.15.1.1. A first article is defined as a pre-production or an initial production sample consisting of one or more of each type of
completed CBC.
4.2 Conformance—Items furnished under this specification shall be subjected to conformance inspection in accordance with
4.1.25.1.2.
4.3 Operating Requirements—Unless otherwise specified, the Type IV CBC shall meet the following operating requirements in
both the height extended and height retracted configurations.
4.3.1 Configurations—The Type IV CBC shall have two configurations, height extended and height retracted. The height
extended configuration is the normal operating configuration for the CBC and provides for maximum usable volume. The height
retracted configuration provides less usable volume but is capable of being loaded on the C-130 and C-141 Military Airlift
Command (MAC) fixed wing aircraft. Unless otherwise specified, the CBC shall meet all the requirements of this specification
sheet in both the height extended and height retracted configurations.
4.3.2 Height Adjustment Device—In both its payloaded (see 3.3.84.3.8) and non-payloaded configurations the Type IV CBC
shall be capable of being manually extended from its retracted configuration and vise versa by two soldiers in 20 min using only
the tools of the Basic Issue Items (BII) and the Additional Authorization List (AAL) as described in the carrier’s Operator’s
Manual, and tools supplied with the CBC. Any hardware or special tools required for extending/retracting the CBC shall be
provided as part of the CBC. Additional materials handling equipment shall not be required. The CBC shall be capable of multiple
extension/retraction cycles, in accordance with its manual, without damage or degradation to either the CBC, its carrier, or its
height adjustment devise.
4.3.3 CBC Service Life, Reliability, and Maintainability—The service life for the CBC shall be at least 15 years. The mean time
to repair at the organizational and intermediate level shall not exceed 4 hours at the 90th percentile. Gaskets, seals, flaps, and other
materials shall be fixed to the CBC and shall be replaceable.
4.3.4 Personnel Hazards:
4.3.4.1 Mechanical—The CBC shall conform to regulatory and consensus design safety standards, unless military applications
require more stringent limits, and reflect applicable system and personnel safety factors. The CBC shall provide personnel
maximum access and safety while installing, operating, and maintaining the equipment.
4.3.4.2 Edge Rounding—All exposed edges and corners shall be rounded. Sharp edges and corners that can present a personnel
safety hazard or caused equipment damage during operation and maintenance shall be rounded or suitably protected.
4.3.5 Toxicity:
4.3.5.1 Materials—Certain chemicals have been identified in Title 29 CFR 1910 as cancer-producing substances (carcinogens).
Materials used in the CBC shall not contain these chemicals. Consideration of the human toxicity of a substance should be given
prior to material selection.
4.3.5.2 Gases or Vapors—The materials, as installed in the equipment and under service conditions specified in the equipment
specification, shall not liberate noxious odors, toxic or corrosive gases, or vapors that would be detrimental to the health of
personnel.
4.3.6 Vents—The CBC shall include two vents for fresh air ventilation. The vents shall be located to facilitate fresh air flow
through the cargo area. The vents shall prevent intrusion of driven rain and have provisions for blackout. Vents shall be capable
of providing ventilation when the vehicle is both stationary and on the move. Vents requiring operation shall be capable of being
operated manually. The interior surface of the door shall have a warning in at least 1 ⁄2 in. high letters contrasting the color of the
Available from Occupational Safety and Health Administration (OSHA), 200 Constitution Ave., NW, Washington, DC 20210, http://www.osha.gov.
Available from American Conference of Governmental Industrial Hygienists, Inc. Hygienists (ACGIH), 1330 Kemper Meadow Dr., Suite 600, Cincinnati, OH 45240,
http://www.acgih.org.
E2518 − 19
door. The warning shall say “Warning—Suffocation hazard, door must remain open while occupied.” This requirement shall apply
to the Type IV CBCs in the height extended configuration only.
4.3.7 Roof Loads—The CBC roof shall be capable of supporting, without structural damage, degradation or permanent
deformation: (1) a uniformly distributed load of 40 lb ⁄ft over the entire surface and (2) a concentrated load of 660 lb over a 1 × 2 ft
1 by 2 ft area applied anywhere on the roof.
4.3.8 Interior Payload Provisions—The CBC shall be capable of accepting threaded fasteners such as rivnuts and inserts for
mounting equipment to the interior of the CBC. The Type IV CBC and its Interior Payload Provisions shall be capable of
supporting at least 1100 lb of payload during its stationary, rail transport, ground mobility and crane lifting operation modes
without damage or degradation to either the CBC or its interior payload provisions. The payload shall be attached to the interior
surfaces using interior payload provisions and shall be distributed as follows: 200 lb mounted to each of the four wall surfaces,
or 400 lb mounted to each of the two side wall surfaces, and 300 lb mounted to the ceiling.
4.3.9 Personnel Door Loads:
4.3.9.1 Personnel Door Structure—The personnel door, including its frame(s) and hardware, shall be capable of supporting a
200 lb static load without damage or degradation to either the CBC or its personnel door, frame(s) and hardware. The load shall
be applied parallel to the hinge line, along the door edge opposite the hinge, with the personnel door open to 90 degrees. The
personnel door shall operate freely after application of the load.
4.3.9.2 Door Stop—The personnel door, including its frame(s) and hardware, shall withstand a wind gust of 60 mph in any
direction when the door is secured by its door stop.
4.3.10 Surface Impact Resistance—The exterior surface of the CBC’s roof shall be capable of withstanding a blow from a 30
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 withstanding a blow from the same steel cylinder, dropped from a height of 16 in.,
without structural degradation.
4.3.11 Tailgate Operation—The CBC, when mounted on its carrier, shall not inhibit operation of the carrier’s tailgate.
4.3.12 Blackout—The CBC/carrier combination, with the personnel door and ports closed, shall not permit a light source from
within to emit detectable amounts of light. This requirement shall apply to the Type IV CBCs in the height extended configuration
only.
4.4 Support and Ownership Requirements—Unless otherwise specified, the Type IV CBC shall meet the following support and
ownership requirements in both the height extended and height retracted configurations.
4.4.1 Weight—The Type IV CBC, including its height adjustment devise, but not its hardware/adapter kit, shall weigh no more
than 800 lb.
4.4.2 Personnel Door—The Type IV CBC shall be equipped with a vertically hinged single personnel door, centrally located
in the rear wall. The door opening shall be a minimum of 48.00 in. wide by 60.00 in. high in the height extended configuration
and shall be a minimum of 48.00 in. wide by 24.00 in. high in its height retracted configuration. The personnel door shall swing
to the outside. The personnel door’s fully opened position shall be at least 135 degrees from its closed position. A door stop, for
securing the personnel door in its fully opened position, shall be provided. In its closed position the personnel door shall prevent
the intrusion of driven rain and dust and shall provide blackout protection.
4.4.2.1 Door Handle—The personnel door shall be equipped with a door handle that provides positive closure. From either side,
the door handle shall be capable of being moved to its opened or closed position with a maximum force of 30 lb applied to the
door handle. The personnel door shall be capable of being padlocked from the outside securing the CBC from the exterior.
4.4.2.2 Secondary Exit—A secondary exit shall be provided within the personnel door. The secondary exit opening shall be a
minimum of 35.00 in. wide by 30.00 in. high. The secondary exit shall be capable of being opened with a maximum force of 30
lb applied to the release mechanism from inside of the CBC with: (1) the tailgate closed and the personnel door locked (2) the
tailgate closed and the personnel door unlocked and (3) the tailgate open and the personnel door locked. With the personnel door
locked, the secondary exit shall not be capable of being opened from outside the CBC. The secondary exit shall provide
unobstructed egress for military personnel. This requirement shall apply to the Type IV CBC in the height extended configuration
only.
4.4.3 Ladder—A ladder shall be provided to allow military personnel to safely enter and exit the CBC/carrier combination
utilizing the CBC’s Personnel Door. The ladder shall be capable of supporting at least 400 lb applied to any individual step without
damage or degradation to either the CBC, carrier or ladder. The CBC shall have a stowage location for the ladder capable of
securely retaining the ladder in all transportation modes without impeding any operations of the CBC or its carrier. The M1083
and M1095 carriers applicable to the Type IV CBC are equipped with a ladder.
4.4.4 Roof Access Handholds/Footholds—Roof access handholds/footholds shall be provided for safe access from the ground
to and descend from the roof when the CBC is mounted on its carrier. The roof access handholds/footholds shall either be built
into the CBC or attached to the exterior. The roof access handholds/footholds shall be designed such that the CBC/carrier
combination does not: (1) exceed the legal highway size limitations imposed by states and foreign countries and (2) limit any other
modes of transportation (for example, rail, air, ship). The roof access handholds/footholds shall be designed for the 5th percentile
female through the 95th percentile male military personnel. Each roof access handhold/footholds shall be capable of supporting
400 lb without damage or degradation to either the CBC or the roof access step/handhold.
E2518 − 19
4.4.5 Power and Signal Entry Ports—Two ports shall be provided in the side walls as forward as practicable to permit the pass
through of power and signal lines into the CBC enclosed area when the CBC is in its height extended configuration. One port shall
be located on the driver’s side and the other port shall be located on the passenger’s side. Each port shall be a minimum of 4 in.
in diameter and not allow the intrusion of driven rain and dust into the CBC and have provisions for blackout. The power and signal
access ports shall have provisions for blackout.
4.4.6 Transportability—The CBC/carrier combination shall be capable of obtaining transportability approval from the Military
Traffic Management Command transportability Engineering Agency (MTMCTEA) based on the requirements for transport in the
following modes:
4.4.6.1 Rail—The CBC/carrier combination with payload shall: (1) meet the Gabarit International de Chargement (GIC)
equipment gauge envelope as defined in interface standard MIL-STD-1366, and (2) be capable of withstanding multiple rail
impacts without damage or degradation to either the CBC or its carrier and without damage to the tiedown cables, or blocking or
bracing.
4.4.6.2 Fixed Wing—The CBC/carrier combination shall be transportable in C-130 and larger Air Mobility Command (AMC)
aircraft. The combination shall also be capable of roll-on/roll-off loading at ramp angles of 15 degrees on the C-130 and larger
AMC aircraft without special handling procedures or equipment. The Type IV CBCs shall be capable of roll-on/roll-off loading
on the C-130 and C-141 AMC aircraft in the height retracted configuration only.
4.4.6.3 Helicopter Sling Load (HSL)—The Type IV CBC mounted on its carrier, in all its payload configurations, shall be
capable of helicopter sling transport by CH-47 or larger rotary wing aircraft in the dual point configuration without damage or
degradation to either the Type IV CBC or the carrier as a result of being flown.
4.4.6.4 Ground Mobility—The CBC/carrier combination shall be capable of meeting the same mission profile and miles as the
carrier when driven over road courses as defined by Perryman, Churchville, and Munson courses found at Aberdeen Proving
Ground, Maryland, without damage or degradation to either the CBC or its carrier. The CBC/carrier combination shall meet U.S.
and NATO countries’ highway legal limits.
4.4.6.5 Lifting Provisions—The CBC shall be equipped with lift provisions to enable it, with its payload, to be lifted on and off
its carrier without damage or degradation to either the CBC or its lift provisions. The CBC’s lift provisions shall conform to the
crane lift requirements of interface standard MIL-STD-209.
4.4.7 Finish:
4.4.7.1 Non-Skid Surfaces—All horizontal surfaces of the CBC (such as, interior floor (if applicable) and exterior roof) shall be
non-skid.
4.4.7.2 Interior Color—The color of the interior walls and ceiling of the CBC shall be semi-gloss white (see 6.47.4).
4.4.7.3 Exterior Color—Unless otherwise specified in the contract (see 6.27.2), the exterior color of the CBC shall be in
accordance with a three-color camouflage pattern. The pattern shall be generated by the government and supplied to the contractor
(see 6.4.17.4.1). The interior surface of the personnel door and secondary exit shall match the primary exterior color of the CBC.
4.4.8 Chemical Agent Resistance—All exterior surfaces, except weather seals and gaskets, shall be Chemical Agent Resistant
Coated (CARC) in accordance with MIL-DTL-53072 using MIL-DTL-53039 chemical agent resistant coatings. All interior
surfaces, except weather seals and gaskets, shall be Chemical Agent Resistant Coated (CARC) in accordance with MIL-DTL-
53072 chemical agent resistant coating. Weather seals shall be resistant to chemical and biological agent contamination,
decontamination fluids and petroleum products or be replaceable at the unit level.
4.4.9 Special Tools—No special tools or equipment shall be required to mount, dismount or operate the CBC. The Type IV CBC
may have a height adjustment devise which includes special tools or equipment (see 3.3.24.3.2).
4.4.10 Mounting—The CBC shall be capable of multiple mounting and dismounting cycles from its carrier, in accordance with
its manual, without damage or degradation to either the CBC, its carrier or its mounting provisions and hardware. These
hardware/adapter kits shall allow the Type IV CBCs to mount to their respective carriers, and shall be ordered separately (see
6.27.2). With the CBC mounted to the carrier, the D-rings in the bed of the carrier shall not be covered, nor shall the operation
of the D-ring be limited.
4.4.11 Carrier Interface:
4.4.11.1 Carrier Series—Using applicable adapters (see 3.4.104.4.10) the Type IV CBC shall be capable of mounting to, and
allowing full operation of, the following carriers:
(1) M923, 5 Ton Cargo Truck,
(2) M1083, 5 Ton Medium Tactical Vehicle (MTV), and
(3) M1095, 5 Ton MTV Trailer.
4.4.11.2 Carrier Modifications:
(1) M923 Modifications—Installation of the Type IV CBC shall utilize the M923’s existing mounting regions to the maximum
extent possible. Modifications to the M923, such as drilled holes, shall be kept to a minimum. No modifications shall be made to
the vehicle’s frame. Any proposed modification(s) made to the M923 must be submitted to the government for approval prior to
incorporation into the design. Only modifications capable of being made in the field with hand tools or small power tools (that is,
installation of rivnuts, drilled or punched holes) shall be considered. Only modifications which permit multiple mounting and
dismounting shall be considered.
E2518 − 19
(2) M1083 and M1095 Modifications—The Type IV CBC shall be capable of being mounted to the M1083 and M1095 using
the existing mounting regions of the carriers. No modifications shall be made to these carriers. The D-rings in the bed of the carrier
shall not be covered, nor shall the operation of the D-ring be limited.
4.4.11.3 Hardware/Adapter Kits—The CBC shall have provisions to mount it to any of the carriers listed in 3.4.11.24.4.11.2(1).
These provisions may include separate hardware or adapters for each type carrier. The hardware/adapter kits shall have as much
commonality as practicable. The hardware/adapters kits shall be ordered separately from the CBC. The kits shall not be part of
the CBC weight but shall weigh no more than 200 lb. A ladder meeting the requirements of 3.4.34.4.3 shall be provided for the
M923 hardware/adapter kit only. The M1083 and M1095 carriers come with a ladder, and therefore do not require a ladder.
4.4.11.4 Installation Tools—The Type IV CBC using the appropriate carrier hardware/adapter kit shall be capable of being
attached to, and detached from, the carrier using only those tools of the Basic Issue Items (BII) and the Additional Authorization
List (AAL) as described in the carrier’s operator’s manual.
4.4.11.5 Interference—The Type IV CBC shall not obstruct or interfere with the installation, removal, or operation of the
carrier’s components (such as, reflectors, brake/tail lights, rear antenna mounts or D-rings).
4.4.12 Identification—The exterior endwall at the door end of each CBC shall be permanently marked to identify the item
nomenclature, including CBC type, manufacturer, contract number, national stock number, tare weight and serial number. This
information shall be visible, by personnel standing on the ground, with the CBC either mounted or dismounted from its carrier.
4.5 Environmental Requirements—Unless otherwise specified, the Type IV CBCs shall meet the following Environmental
requirements in both the height extended and height retracted configurations.
4.5.1 Humidity Resistance—The CBC shall be capable of withstanding daily exposure of up to 97 % relative humidity for 20
hoursh and exposure of 100 % relative humidity (with condensation) for 4 hoursh without evidence of corrosion, structural
damage, degradation or permanent deformation.
4.5.2 Marine Atmosphere (Sea-Salt Fallout)—The CBC, when exposed to a marine environment sea salt fallout rate equivalent
to 25 poundslb per acre per year (2.0 g ⁄m /yr), shall not corrode or degrade.
4.5.3 Ice—The CBC including its door(s), vents and cable ports shall be capable of withstanding and remaining operational
while the CBC is exposed to the forces and effects due to the accumulation of 0.25 in. (6 mm) of ice produced by freezing rain,
mist, or sea spray.
4.5.4 Temperature Range—The CBC shall be capable of withstanding temperatures ranges of −60ºF−60 to 160ºF160 °F in
storage and transit and −60ºF−60 to 120ºF120 °F plus solar load for normal operations. The CBC, including fasteners, seals or
other hardware, shall show no evidence of corrosion or degradation.
4.5.5 Temperature Shock—The CBC shall withstand a temperature shock from an equilibrium state of 160ºF160 to −70ºF−70 °F
within 5 min and from an equilibrium state of −70 ºF to 160ºF160 °F within 5 min without evidence of structural damage,
degradation, or permanent deformation.
4.5.6 Blowing Sand and Dust—The CBC, when mounted on its carrier, shall resist the effects of blowing sand and dust without
damage or degradation. The CBC shall remain fully operational with no more than 16.80 in. (0.50 pt) (0.50 pt) of sand
penetration into the interior of the CBC. Blowing sand is defined as 150 – 1000 micron particles in concentrations of
-4 3
1.32 × 10 lb ⁄ft with a wind speed of 1750 ft ⁄min.
4.5.7 Ultraviolet Effects—The CBC shall show no evidence of structural damage, degradation or permanent deformation as a
result of exposure to ultraviolet effects.
4.5.8 Fire Resistance—The CBC shall be non-burning or self-extinguishing (that is, have a flame time of less than 30 seconds)s)
after removal of a flame.
4.5.9 Fungus—The CBC shall be impervious to fungus growth. Materials shall be selected to minimize fungus growth.
4.5.10 Watertightness—The CBC, when mounted on its carrier, without the aide of supplementary sealing, caulking, taping or
other means, shall be capable of withstanding a 40 psig spray from nozzles located 19 in. from, and normal to, each external CBC
surface. The CBC shall not allow more than 8 fluid oz. of water into the interior of the CBC in a 40-min 40 min period and the
weight of the CBC shall not increase by more than 1.00 lb.
4.6 Interface and Operability Requirements—Unless otherwise specified, the Type IV CBCs shall meet the following interface
and operability requirements in both the height extended and height retracted configurations.
4.6.1 Interchangeability—The spare parts of the CBC produced under this specification shall be functionally and dimensionally
interchangeable without modification or rework of the part or assembly.
4.6.2 Size—The Type IV CBC shall enclose the cargo (rear) portion of the carrier to provide the maximum volume practicable
for its configuration.
4.6.2.1 Interior Width, Length, and Height—The interior dimensions of the Type IV CBC shall be no less than 140.00 in. long
by 77.0 in. wide by 72.00 in. high in its height extended configuration and shall be no less than 140.00 in. long by 77.0 in. wide
by 30.00 in. high in its stowed configuration. The CBC shall not interfere, cover or limit the operation of the D-Rings located
around the perimeter of the host vehicle cargo bed.
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5. Verification
5.1 Classification of Inspections—The inspection requirements specified herein are classified as follows:
(1) First article inspection (see 4.1.15.1.1), and
(2) Conformance inspection (see 4.1.25.1.2).
5.1.1 First Article Inspection—When a first article inspection is required (see 3.14.1 and 6.27.2), the CBC shall undergo the tests
and examinations outlined in Table 1. Sampling for the first article inspection shall be as specified in the contract or purchase order.
5.1.2 Conformance Inspection—When a conformance inspection is required (see 6.27.2) specific inspections to be performed
shall be defined by the contract (see 6.27.2) and shall include any verification contained herein.
5.2 Verification Methods—Verification methods can include visual examination, measurement, testing, simulation, modeling,
engineering evaluation, component properties analysis, certification and similarity to previously approved or previously qualified
designs. Unless otherwise specified, the Type IV CBC’s requirements shall be verified in both the height extended and height
retracted configurations.
5.2.1 Verification Alternatives—The contractor may propose alternative test methods, techniques, or equipment, including the
application of statistical process control, tool control, or cost effective sampling procedures to verify performance. In the case of
the Type IV CBC, the contractor may propose to perform verifications in only one configuration (that is, extended or retracted)
if it can be shown that this method will to verify the requirement for both configurations.
5.3 Operating Requirements Verification
5.3.1 Configurations—Unless otherwise specified, all verifications shall be performed in both the height extended and height
retracted configurations. Failure to meet the requirements of 3.3.14.3.1 shall constitute failure of this test.
5.3.2 Height Adjustment Device—To verify the requirements of 3.3.24.3.2, the CBC while mounted on its carrier, shall undergo
10 extension/retraction cycles in accordance with its manual, using only the hardware provided with the CBC. The CBC and its
carrier shall be inspected after each cycle for damage or degradation. Failure to meet the requirements of 3.3.24.3.2 shall constitute
failure of this test.
5.3.3 CBC Service Life, Reliability, and Maintainability—The CBC shall be analyzed to determine that its service life is in
compliance with 3.3.34.3.3. Repairs that are to be completed at the organizational and intermediate levels shall be identified with
projected times to repair. Failure to meet the requirements of 3.3.34.3.3 shall constitute failure. Using only the hardware provided
with the CBC, the CBC shall undergo 10 cycles of installation and removal from its carrier in accordance with its manual. The
CBC and its carrier shall be inspected after each cycle for damage or degradation. Failure to meet the mounting and dismounting
requirements of 3.3.34.3.3 shall constitute failure of this test. The appropriate hardware/adapter kit shall be provided for the Type
IV CBCs.
5.3.4 Personal Hazards:
5.3.4.1 Mechanical—The CBC shall conform to regulatory, such as Title 29 CFR 1910, and consensus design safety standards,
that is, ANSI, unless military STDs or HDBKs require more stringent limits, and reflect applicable system and personnel safety
factors. The CBC shall provide personnel maximum access (MIL-STD-1472 and MIL-HDBK-759) and safety while installing,
operating, and maintaining the equipment.
5.3.4.2 Edge Rounding—All exposed edges and corners shall be rounded to a radius not less than 0.03 in. (0.75 mm). Sharp
edges and corners that can present a personnel safety hazard or caused equipment damage during operation and maintenance shall
be rounded to a radius not less than 0.05 in. (1.3 mm) or suitably protected.
5.3.5 Toxicity:
5.3.5.1 Materials—Certify that Material Safety Data Sheets do not include chemicals identified in Title 29 CFR 1910 as
cancer-producing substances (carcinogens).
5.3.5.2 Gases or Vapors—Demonstrate the CBC does not produce toxic exposures exceeding OHSA permissible exposure
limits, Title 29 CFR 1910 or ACGIH Threshold Limit Values for noxious odors, toxic or corrosive gases, or vapors from materials
used in the CBC’s construction. Failure to meet the requirements of 3.3.5.24.3.5.2 shall constitute failure of this test.
5.3.6 Vents—The ventilation ports shall be inspected and manually operated (if applicable) for compliance with 3.3.64.3.6.
Failure to meet the requirements of 3.3.64.3.6 shall constitute failure of this test. The Type III CBC shall be verified in the height
extended configuration only.
5.3.7 Roof Loads—The CBC roof shall be subjected to a uniform load of 40 lb ⁄ft over the entire surface. After removal of the
uniform load, a 660 lb load shall be applied to the weakest region of the roof over a 1 × 2 ft 1 by 2 ft area. Each test shall be for
duration of 5 min. Failure to meet the requirements of 3.3.74.3.7 shall constitute failure of this test.
5.3.8 Interior Payload Provisions—The Type III CBC, with the interior payload described in 3.3.84.3.8, shall be tested in
accordance with 4.4.6.15.4.6.1 (Rail), 4.4.6.45.4.6.4 (Ground Mobility). The CBC shall also be tested in accordance with
4.4.6.55.4.6.5 (Lifting Provisions). Failure to meet the requirements of 3.3.74.3.7 shall constitute failure of this test.
5.3.9 Personnel Door Loads:
5.3.9.1 Personnel Door Structure—The door shall have a 200 lb static load applied parallel to the hinge line, along the door edge
opposite the hinge, with the door open 90 degrees. After 10 min the load shall be removed and the door examined. Failure to meet
the requirements of 3.3.9.14.3.9.1 shall constitute failure of this test.
E2518 − 19
TABLE 1 Sequence of First Article Verifications
Requirement Verification
Verification
Paragraph Paragraph
Configurations 3.3.1 4.3.1
Configurations 4.3.1 5.3.1
Height adjustment device 3.3.2 4.3.2
Height adjustment device 4.3.2 5.3.2
CBC service life, reliability, and
3.3.3 4.3.3
maintainability
CBC service l
...