CN-PD 06-10

June 7, 2010

PERFORMANCE SPECIFICATION

1.1. Scope. This Performance Specification describes a modular tent system that provides

environmental protection to Soldiers and Marines for multiple uses such as a field maintenance facility

for wheeled and track vehicles, sheltering for laundries and receiving, shipping and storage areas.

1.2 Classification. The Lightweight Maintenance Enclosure (LME) tent system will be of the

following types and classes:

Types:

2.1 General. Listed in this section are documents specified in Sections 3 and 4 of this specification.

Documents cited in other sections of this specification or recommended for additional information or

as examples are not included in this listing. While every effort has been made to ensure the

completeness of this list, document users are cautioned that they shall successfully satisfy all Section 3

requirements and Section 4 verifications whether or not they are listed.

Beneficial Comments (recommendations, additions, deletions) and any pertinent data which may be of

use in improving this document should be addressed to: PM Force Sustainment Systems, SFAE-CSS-

2.2 Government documents.

2.2.1 Specifications, standards, and handbooks.

Military Specifications

MIL-PRF-20696 Cloth, Waterproof, Weather Resistant

MIL-PRF-44103 Cloth, Fire, Water, and Weather Resistant

Military Standards

MIL-STD-130 Identification Marking of U.S. Military Property

MIL-STD-810 Environmental Engineering Considerations and Laboratory Tests

MIL-STD-1472 Human Engineering

(Copies of these documents are available online at http://assist.daps.dla.mil/quicksearch/ or

http://assist.daps.dla.mil/ or from the Standardization Document Order Desk, 700 Robbins

Avenue, Building 4D, Philadelphia, PA 19111-5094.)

US Army Regulations

(For further information, contact for camouflage colors only: U.S. Army Research Laboratory, CARC

Commodity Management, ATTN: AMSRD-ARL-WM-MC, Aberdeen Proving Ground, MD 21005-

5069)

2.2.2 Other Government documents, drawings, and publications.

including Repair Parts and Special Tools List (RPSTL) for the

Lightweight Maintenance Enclosure

5-4-7861 Lightweight Maintenance Enclosure (LME) Type I

5-4-8762 Lightweight Maintenance Enclosure (LME) Type II LADS

2.2.3 Sources Of Government Documents.

NSRDEC Drawings Product Manager Force Sustainment Systems

SAFE-CSS-FP-F

Kansas St.

Natick, MA 01760-5057

2.3 Non-Government publications. The following documents form a part of this document to the

2.3.1 Non-Government Documents.

ASTM B221 Aluminum and Aluminum-Alloy, Extruded Bars, Rods, Wires, Profiles

and Tubes

ASTM D751 Standard Test Method for Coated Fabrics

ASTM D2136 Standard Test Method for Fabrics, Coated, Low-Temperature Bend Test

ISO 105-E05 Textiles, Tests for Colour Fastness, part E05

SAE J1966 Lubricating oil, Aircraft Piston Engine (Nondispersant Mineral Oil)

SAE-AMS-QQ-A-200/8 Aluminum Alloy 6061, Bar, Rod, Shapes, Tube, and Wire, Extruded

USIFI-PRF-44103 Cloth, Fire, Water and Weather Resistant

No Number Chemical Exposure Guidelines, Version 9

No Number Pocket Guide to Chemical Hazards, 3

printing

2.3.2 Sources of Non-Government Documents Referenced.

AATCC - American Association of Textile Chemists and Colorists

AIHA Workplace Environmental Exposure Level Guide Series

1600 Clifton Rd.

Atlanta, GA 30333

Pocket Guide to Chemical Hazards

http://wwwn.cdc.gov/pubs/niosh.aspx

Email address: cdcinfo@cdc.gov

(Order Publication No. 2005-151)

Society of Automotive Engineers

SAE World Headquarters

400 Commonwealth Drive

Warrendale, PA 15096-0001

http://www.sae.org

USIFI - United States Industrial Fabrics Institute, a division of IFAI

1801 County Road B West

Roseville, MN 55113

http://www.usifi.com

OTHER PUBLICATIONS

http://taylorandfrancis.co/uk

Marzulli, F. and H. Maibach, “Contact Allergy: Predictive Testing in Humans,” Advances in

U. S. Army Center for Health Promotion and Preventative Medicine

ATTN: MCHB-DC-TTE, Bldg. E-2100

Aberdeen Proving Ground, MD 21010-5422

3.1 First Article/Conformance/End Item Requirements. The first article sample when specified in the

contract shall be defined in the solicitation (see 6.2) and will be subjected to testing and inspection

according to section 4 Verification.

3.1.1 Configuration Control. The contractor shall be responsible to ensure that upon successful

completion and Government approval of First Article samples, engineering changes that affect

interchangeability of LME components or affect component fit or function shall not be implemented in

production without the approval of the Configuration Manager. The U.S. Army Product Manager

3.2 Interchangeability, Interoperability and Interface Requirements.

Table 3.0-2

including fabric, support system, tent pins and transport covers, shall be functionally interoperable

and physically interchangeable with all other LMEs with no binding or misfit affecting ease of

operation, visible openings affecting blackout, or form, fit and function incompatibilities. In

addition, the LME must interface with standard military shipping equipment; standard military

camouflage net systems, standard U.S. Army Large Capacity Field Heater (LCFH) environmental

be compatible with the standard Army ULCANS. Camouflage nets shall be able to be positioned

over the LME tent with minimum interference or hindrance by LME tent components. No ladders,

vehicles or special equipment shall be required for installation of standard camouflage net systems

over LME tents.

3.2.2.2 Item 2. Environmental Conditioning Unit (ECU) duct interface. The LME shall permit the

passage of two each, 16-inch diameter flexible environmental control ducts, 5 to 6 feet apart, through

the tent intermediate section at a minimum centerline height of 22 inches above ground level to allow

interface with existing LCFHs. There shall be a weatherproof sleeve on each duct opening of an

intermediate fabric section. This interface shall allow intake and exhaust environmental control ducts

and 24” wooden tent stakes to restrain the tent from movement when subjected to the environmental

conditions of 3.5. The LME shall be compatible with existing stocked tent pins. The LME wall

connections shall interface with 18-inch long, 0.625 diameter steel tent pins. Along the base of the

LME tent lines shall interface with 16-inch and/or 24-inch long electrically non-conductive tent

pins/stakes. The tent pins/stakes shall be easily connected, adjusted and removed from the LME and

any supporting lines, while providing a secure connection.

3.3 System Performance Requirements - Physical Characteristics.

3.3.1 Dimensions. The LME shall have the minimum interior width of 23 feet at the base, a minimum

working height (vehicle door opening) of 13 feet, which is at a minimum of 6 feet wide, and a

minimum length of 32 feet when erected.

3.3.3 Color Requirement. The exterior color of the LME shall be identified by Class as stated in the

contract.

3.3.3.1 Class I. The exterior color shall be Camouflage Green 483. All hardware, findings, plastic

components, fastener tape, webbing, grommets, straps, slips and guy lines, etc., visible from the tent

exterior, shall approximate the tent color or shall be black. All support components shall approximate

green or black. All components shall have a dull finish to reduce reflectance. Covers and containers

the tent color or shall be black. All support components shall approximate tan or black. All

components shall have a dull finish to reduce reflectance. Covers and containers shall comply with

contract camouflage requirements.

3.3.3.3 Backside color of cloth. The backside color of the cloth for both classes shall be Gray, Color

Chip Number 16515, IAW FED-STD-595C.

3.3.4 Ventilation. The LME shall provide ventilation. The LME shall have sufficient ventilation to

prevent hazardous fumes/combustion product build-up from vehicles or equipment being worked on.

The LME shall have sufficient warm weather high rate non-powered air exchange in non-blackout, hot

no damage or degradation of setup/strike performance, or blackout compliance.

3.3.6 Blackout Requirement. The fully erected LME shall prevent detectable light leakage through the

fabric (in accordance with the opacity test requirements stated in MIL-PRF-44103) and all openings

when viewed with the naked eye at 100 meters or with the aid of night vision goggles at 300 meters

when using the four lights (MIL-L-44259) supplied with the LME.

3.4 Operating Requirements.

3.4.1 Setup/Strike. The LME shall be easily erected (set-up) following the written instructions found

in the US Army Technical Manual (TM) 10-5410-284-13&P, Operator’s , Unit and Direct Support

Manual including Repair Parts and Special Tools List (RPSTL) for the Lightweight Maintenance

windows or other mechanisms of the tent normally operated in day-to-day use shall be operable

without binding, special adjustment, interference, or malfunction.

3.4.2 Crew Size. The crew size required to setup/strike the LME shall not exceed twelve (12)

personnel for a 32’ tent. Twelve (12) personnel shall be able to erect a single tent in less than 1 hour

and perform striking of a tent in no more than 1 hour in temperate climatic conditions. The physical

characteristics of the personnel available to setup/strike the tent shall range from a 5th percentile height

female (female: 61.8 inches) to a 95th percentile height male (male: 73.5 inches).

3.4.4 Instruction labels. A permanent instruction label shall be provided with clearly written

instructions and/or a stick figure sequence showing how to set up, strike, pack, and operate the LME.

The permanent label shall be placed on the interior of one of the LME end walls near or on the

personnel door opening at approximately eye height. A copy of this label shall also be placed inside

each frame transport cover and each fabric transport cover.

3.5 Environmental requirements. The following conditions define the environmental limits for the

LME. The LME shall provide protection for the occupants in all the following environmental

conditions without degradation in performance.

hour for a period of three hours without resulting in degradation of safety and personnel or loss of

mission capability.

Rain leakage is defined as:

water) which under ordinary circumstances will not impair its intended military use.

surface which impairs the item’s intended military use.

3.5.3 Wind-Driven Rain. The LME shall be capable of withstanding a wind-driven rain at 2 inches

per hour with wind speeds of 50 miles per hour (MPH) for 30 minutes with three (3) occurrences of

five (5) second wind gusts to 65 mph within the same 30-minute period. The LME shall also

gusts of 65 mph in 3-second duration’s from any direction, over the entire surface of the enclosure.

The LME shall be capable of sustaining winds without incurring damage, which would prevent the tent

from being repaired, or components used in other locations allowing the tent to continue its mission

when all the guy lines are anchored in a way that eliminates the possibility of lines coming loose.

3.5.5 Snow load. The LME shall support a maximum snow load of 10 pounds per square foot

uniformly distributed over the horizontal projection of the roof. The LME shall support the total load

3.5.7 Humidity. The performance of the LME shall not be adversely affected by ambient humidity

between zero and 100% (relative humidity), regardless of ambient Temperature. The LME shall

minimize condensation on the inside of the tent that may adversely affect personnel or loss of

mission capability.

3.5.8 Salt fog. The LME shall be operable in seashore and coastal climates.

3.5.9 Blowing sand and dust. The LME shall protect occupants from dust and sandstorms.

0

3.5.12 Environmental Acids. The LME shall resist damage from acids, including acid rain and bird

droppings.

3.5.13 Oil resistance. Lubricating oil conforming to SAE Viscosity Grade 50 of SAE J1966 shall not

leak through, seep through, or permeate the cover material. The LME shall resist permanent

operational/functional damage from motor oil and synthetic lubricants.

3.5.14 Transportation environment. The LME shall be compatible with typical shock, bounce and

vibration environment encountered during shipping by ground vehicle, train and aircraft.

3.6 Fabric Performance

3.6.1.2 Transport Covers and Containers. Material used for the body of transport covers and containers

shall meet or exceed the requirements of MIL-PRF-20696, Type II, Class 2. When MI-PRF-20696 is

used it must also meet minimum flame resistance requirement of MIL-PRF-44103D.

4.4.3 Interface and interchangeability criteria. Visually examine each configuration for compatibility

between the baseline LME components and Sample LME components. Verify no binding or misfit

affecting ease of operation, visible openings affecting blackout, or form, fit and function

incompatibilities between the Sample LME and the baseline LME. Inspect each configuration for

galling, abrasion, pinching, mutilation, misalignment, distortion, distention, bent, misshapen, or

weatherproof sleeves.

4.4.3.2 Tent pins interface demonstration. Visually inspect for 18 inch steel tent pins, 16 and 24 inch

electrically non-conductive wood tent stakes, with the number of tent pins/stakes appropriate to LME

connections. Attach a sample tent line and wall connector to tent pins/stakes and verify a secure

connection.

4.4.3.3 Use with ULCANS camouflage nets. Visually inspect for compatibility of using the LME with

standard Army ULCANS.

4.5.2 Weight. Weigh the total components required for each type LME. The LME has a maximum

total packed weight of 1,500 lbs. The total maximum weight includes all fabric components, frame

components, guy lines, tent stakes, electrical components, dedicated field repair kit, and transport

covers, bags and/or containers less shipping crates and containers.

4.5.3 Color.

4.5.3.1 LME color inspection.

4.5.3.1.1 Class I. Visually inspect the exterior LME color for similarity to the standard sample color of

Class I LME, as specified by the contract. Verify that no shiny or light reflective components are

visible on the tent exterior. The color and appearance of the face side and the back side of the cloth

visible from the tent exterior are similar to Camouflage Green, Olive Drab or Black. Verify metal and

plastic components are a subdued color. These may retain the color from manufacturing if not shiny or

light reflective.

4.5.3.1.2 Class II. The exterior color shall be Tan 686A, Chip Number 33446, in accordance with

Federal Standard 595C, Colors Used in Government Procurement. The color requirements are detailed

Tan 459. The average infrared reflectance shall be 62 to 72 percent between 720 to 860 nanometers.

will not be sufficient to assure product acceptance by the contracting activity. For further information,

contact for camouflage colors only: U.S. Army Research Laboratory, CARC Commodity

Management, ATTN: AMSRD-ARL-WM-MC, Aberdeen Proving Ground, MD 21005-5069.” All

hardware, findings, plastic components, fastener tape, webbing, grommets, straps, slips and guy lines,

etc., visible from the tent exterior, shall approximate the tent color or shall be black. All support

components shall approximate tan or black. All components shall have a dull finish to reduce

reflectance. Covers and containers shall comply with contract camouflage requirements.

4.5.3.1.2.1 Hardware and findings color - Class II inspection. Visually inspect findings are

approximately the same color as the LME. Verify hardware, guy ropes and plastic components visible

4.5.4.1 Cold weather ventilation verification. Demonstrate the ventilation rate can be manually

adjusted from zero to the maximum rate, and then meet the cold weather ventilation demonstration or

the cold weather ventilation analysis.

4.5.4.1.1 Cold weather ventilation demonstration. Measure the ventilation rate on a fully erected LME

with ambient temperature at 30

F or below. Ventilation rate shall be between 8 and 20 cubic feet per

minute with the interior temperature maintained at a minimum of 50

4.5.4.1.2 Alternative cold weather ventilation analysis. Measure the fully open ventilation area to be at

least 5 square feet and not extending more than 40 inches below the roof peak.

or less.

4.5.4.2.2 Alternative warm weather ventilation demonstration. Test a fully erected LME with doors

and other openings adjusted for a tropical, non-blackout environment. Verify the internal Temperature

remains below +100

F over a 5-hour period with the measurement taken at the center of the LME, 5

feet above floor level. Ambient conditions are full sunlight with Temperature at + 80

wind and of 1 knot or less.

4.5.4.3.1 Odors measurements. After completing each of the operating environment tests, a panel of

three inspectors performs the odor test. If anyone inspector detects any smell, persisting after 15

seconds, classified as nauseous, repellent, burning, strongly penetrating, drying nasal passages, causing

dizziness, sneezing or any adverse reaction, the results are not acceptable. Aromatic odors usually

associated with specific types of rubber compounds are not objectionable.

4.5.4.3.2 Alternative odors analysis. Demonstrate by analysis, the tent materials and manufacturing

processes do not result in a product that can produce noxious odors.

4.5.6 Blackout protection demonstration. Conduct this test with a fully erected LME with doors and

other openings closed. Perform the test on a moonless night in an area absent of man-made light

sources. Locate and position general illumination fluorescent light set provided with the LME per the

manufacturer’s instructions. Visually verify no visible light is detectable, using the naked eye, from a

distance of 100 meters. Begin observations directly in front of the light source. Continue observations

360 degrees around the LME at 45-degree increments. Perform the night vision blackout test, using a

night vision device (NVGs) from a distance of 300 meters from the LME. Verify the light source is

not detectable through the NVGs.

binding or interference. Demonstrate LME strike and pack by a maximum of twelve (12) soldiers,

following TM instructions. Complete this demonstration in a maximum of 60 minutes.

4.6.2 Extreme weather operation demonstration. Perform set-up demonstration. Perform LME strike

and pack for transport demonstration. Accomplish all demonstrations while wearing cold weather

clothing and gloves. Do not remove gloves to perform any operation.

4.6.3 Access inspection. Visually inspect for a minimum of one vehicle and one personnel door at

doors while wearing cold weather clothing, including gloves. Verify that doors operate smoothly

without binding or hang-up.

4.6.3.2 Personnel door. Visually inspect the personnel door for a minimum opening size of 6 feet 6

inches in height and 3 feet in width. Inspect personnel door capability of being secured in either the

open or closed configuration.

4.6.4 Instruction labels inspection. Visually inspect for legible, permanent labels attached to the

interior of each end wall. Visually inspect that labels contain clear written instructions and/or a stick

figure sequence noting how to erect, strike, pack, and operate the LME. Visually inspect that the label

4.6.6.2 Intermediate section. Visually inspect the intermediate fabric section for four window

assemblies, two on each side and two Environmental Control Unit (ECU) duct openings on one side

only. Inspect windows for a barrier against wind, rain, sand and dust. Inspect windows for a means of

containing interior light during blackout operations. They shall include a means of preventing the

intrusion of insects while permitting the passage of air through the window opening. Inspect for an

electrical supply feed through for electric wires or bundle of wires up to five inches in diameter

through the intermediate section. It shall include an ability to seal the outer wall to the wires to prevent

water migration and minimize the exchange of air between inside and outside. The feed through shall

seal against the intrusion of water and dust when in use and when closed.

4.7 Operating Environment Requirements.

weather configuration, after conditioning for 8 hours at - 25

0

this environment during the demonstration. Anchor points may be substituted for tent pins. After

completing the erection, examine the LME for cracking or other failures.

4.7.1.2 LME components demonstration. Perform the cloth component test and the fastener test, with

the cold and hot conditions as defined below.

4.7.1.2.1 Cold temperature conditioning. Use two, 1 by 4-inch specimens of each type of cloth and

0

0

4.7.1.2.3 Cloth components test. Cut specimens of each type of tent material (including any tent lines

and insect barriers) with one long dimension in warp and one long dimension in fill. If components

cannot physically meet this size requirement, such as in 2 inch wide webbing, use the typical size, but

test in both dimensions, except for tent lines. Remove sample from the conditioning environment.

Bend each sample 180

0

Temperature. Complete this procedure within 30 seconds after removing the specimen from the

conditioned environment. Verify the sample remains intact, without visible signs of deterioration.

4.7.1.2.4 Fasteners test. While still in the conditioning environment, operate each type of fastening

device after the exposure period. Verify no binding or deterioration.

result in degradation of safety or loss of mission capability.

4.7.2.2 Wind driven rain test. Simulate a wind driven rain at a rate of two inches per hour for 30

minutes at wind speeds of 55 MPH with occasional gusts to 65 MPH for 5 seconds every 10 minutes.

Inspect the interior during the test for evidence of water leakage, indicated by visible streams of water,

running down the inside of the LME, falling from the inner surface, or by blown water detectable to

LME occupants.

4.7.3 Wind resistance verification. Perform the wind load demonstration or the alternative analysis.

4.7.3.1 Wind load demonstration. Perform a wind test for one hour with the wind speed at 25 mph,

with one 5-minute period at 55 mph, and two periods at 65 mph for 3 seconds each. All anchor points

4.7.4 Snow and sleet resistance verification. Perform the snow load test or the alternative analysis.

4.7.4.1 Snow load test. Erect a LME with all doors, flaps and other openings configured for cold

weather blackout conditions. Perform this test on frozen soil, or hardpan dry soil to simulate winter soil

conditions. Evenly load the entire top surface of the LME at 10 pounds per square foot. Apply the

weight gradually over 12 hours and leave in place for an additional 12 hours. Typical user

adjustments, such as line tensioning, may be performed as necessary.

4.7.5.1 Sunlight resistance test. Erect a LME configured with all doors, flaps and other openings in the

closed position. Subject all exterior LME components to a uniform 100 Kilojoules ultraviolet

environment for at least 500 hours. After completing the exposure, verify no cracking, crazing,

blooming, and chalking or appreciable color change on any exterior LME component.

4.7.6 Humidity compatibility demonstration. Assemble LME into a humid environment with

Temperature above +70

0

F and relative humidity at least 75 percent for a period of two weeks. Then

manipulate all fasteners, flaps, doors and tent adjustments to verify smooth, non-binding operation.

Verify no residue or discoloration from corrosion on the operator’s hands. This test may be performed

insect barriers) and all tent fasteners and metal components. Subject the samples to a continuously

atomized, finely divided, wet, dense salt spray mixture of 5% sodium chloride and 95% water. Verify

the spray apparatus, piping, and reservoir is not reactive to salt spray.

4.7.7.1.1 Salt fog chamber test procedure. Uniformly distribute the salt fog over each sample at a

fallout rate between 0.5 and 3-ml/80 cm2/hr for at least 48 hours at a constant 95

0

F

with minimal air

circulation. After the test, dry the samples at ambient conditions for at least 48 hours, then meet the

salt fog resistance criteria.

4.7.7.2 Alternate salt fog field demonstration. Place the assembled LME into a salt atmosphere for a

period of two weeks. Permissible sites include beach areas with direct exposure to on-shore ocean

breezes and temperatures above +70

0

F. Meet the salt fog resistance criteria following the exposure

acceptable. Manipulate all fasteners, flaps, doors and tent adjustments to confirm smooth, non-binding

operation. Verify no residue or discoloration from corrosion on the operator’s hands.

4.7.8 Sand and dust resistance inspection. Inspect a fully erected LME, in blackout configuration, for

any openings larger than 1 square inch that would allow entry of blowing sand and dust.

4.7.9 Mildew resistance. To determine conformance the tent material shall be tested IAW ASTM G21

and shall pass with a rating of zero, when subjected to fungi laden atmosphere at 82 -86

4.7.10.1 Insect damage resistance verification. Verify resistance to insect damage by demonstration or

analysis.

4.7.10.1.1 Insect resistance demonstration. Test LME samples following ISO 3998 Textiles --

Determination of resistance to certain insect pests, or equivalent methods.

4.7.10.1.2 Alternative insect resistance analysis. Demonstrate tent materials are similar to the currently

fielded LME's.

4.7.10.2 Insect protection verification. Verify protection from insects, including flying insects as small

of LME surface area prevents entry of insects by meeting the maximum opening size criterion (this

includes openings around any fasteners or other interfaces). Verify the tent-to-ground interface and

any other openings are 1/8 inch maximum.

4.7.10.2.2 Insect barrier burst strength demonstration. Test three samples of insect barrier with a

procedure capable of providing 99 percent repeatable accuracy. Verify the minimum burst strength for

an evenly distributed load over a 4-inch square sample is 165 pounds per square inch (psi).

4.7.10.2.3 Insect barrier materials inspection. Visually inspect the insect barriers.

4.7.11 Environmental acids verification. Use ISO 105-E05, Textiles, Tests for Colour Fastness, Part

E05, to demonstrate compatibility with environmental acids, such as acid rain and bird droppings.

4.7.13 Transportation environment compatibility verification. Perform the Temperature storage limits

test, vibration test, shock test, and bounce test, in order, on a LME in the packed for transport

configuration. Then unpack LME and visually inspect for abraded areas, cuts, tears or rips, especially

in fabric areas that contact metal components. Verify LME and framework fasteners, adjusters and

connectors operate smoothly. Erect the LME and verify no damage, such as broken or non-functional

components and abrasions that affect performance. This may be combined with any other LME

erection demonstration.

0

0

of 0.03 inches (0.06 inches maximum excursion). Vary the frequency between 5 and 500 Hertz, with a

full cycle time of ten minutes. Apply this motion for 2 hours in each of three, mutually perpendicular

directions for a total test time of 6 hours.

4.7.13.3 Shock test. Cold soak the LME components at - 25

F +/- 5

F for 8 hours. Drop each

component, in its packed configuration from at least 4 feet onto a concrete surface. If different impact

orientations are possible, for example, lengthwise and end impacts, test each orientation once,

sequentially.

4.7.13.4 Bounce test. Place all packed LME components onto a plywood-covered test bed (marine

4.8.1 Material Performance. Verify fabric meets or exceeds MIL-PRF-44103D with exceptions.

4.8.2 Flammability verification. Meet the flammability criteria. This requirement does not apply to

tent stakes, frame sections or guy lines.

4.8.2.1 Flammability demonstration. Use The American Society for Testing and Materials (ASTM)

D6413 – Standard Test Method for Flame Resistance of Textiles (Vertical Test). Verify the fabric(s)

used in the production of the LME shall be self-extinguishing within 2.0 seconds after exposure to the

flame source for 12 seconds in both the warp and fill directions. Damaged length shall be less than

50% of the sample length. There shall be no flaming melt drip or molten pieces of fabric at any time.

4.8.3 Toxicity test. When required, an acute dermal irritation study and a skin sensitization study shall

compounds listed in the NIOSH Pocket Guide to Chemical Hazards. Demonstrate the LME does not

produce dangerous toxic exposures by meeting published chemical threshold limit values. Acceptable

limits are any one of the following: The American Conference of Governmental Industrial Hygienists

(ACGIH) Threshold Limit Values; the Santa Clara Center for Occupational Safety and Health

Chemical Exposure Guidelines, Table 1 - OSHA Permissible Exposure Limits; NIOSH Pocket Guide

to Chemical Hazards, Exposure Limits and Signs and Symptoms of Exposure; or the AIHA Workplace

Environmental Exposure Level Guide Series.

4.8.5 Cold Crack. The fabric shall be resistant to cold crack at -50

0

D236.

4.8.6 Seam Strength. The fabric shall provide a seam strength of 160 lbf/1in when tested IAW

ASTM 751 using a 1 inch by 8 inch sample.

4.8.7 Dead Load Seam Strength. The fabric seam, bonded using dielectric or hot air welder and 1

inch seam width, shall withstand a 50lb load for 4 hours at 160

0

F and a 100lb load for 4 hours at

room temperature when tested IAW ASTM D751.

components operate and function as intended. Ensure they do not interfere with or impede access to

doors, windows or tent external interfaces. Verify the base of the support system has design feature for

resisting movement or slipping during use.

4.10 Electrical. Verify all electrical components operate and function as intended.

4.10.1 Lighting. Visually inspect that the lights supplied provide general illumination and are energy

efficient lighting system sufficient to allow operations to continue during nighttime operations, periods

of reduced visibility, or when fully closed. Ensure lights meet minimum performance requirements of

inspect that there is sufficient quantity and length of power cables to connect lights and to connect to

power distribution box.

least six (6) weather-resistant Ground Fault Circuit Interrupter (GFCI) protected outlets to provide

power for maintenance operations.

4.11.1 Safety and health verification. Complete the flammability verification and the hazard

inspection.

4.11.2.1.1 Alternative durability analysis. Demonstrate tent materials and manufacturing processes are

similar to the currently fielded Lightweight Maintenance Enclosures.

4.11.2.2 Reliability verification. Perform the reliability demonstration on a fully erected LME. Fasten

and unfasten all connectors, interfaces, toggles, and other methods of tent assembly through a

minimum of 50 cycles. For adjustable components, such as tent lines, flaps, vents, doors, deployable

insect barriers and other user-operated features, cycle through open and closed positions a minimum of

1000 cycles. Any binding or misfit that affects ease of operation, or any form, fit and function

incompatibilities constitutes test failure. Inspect all components following the demonstration for any

a maximum of eight soldiers. Weigh or suspend each LME component from a suitable measuring

device, simulating the user’s lifting position and measure individual weight loads to be 37 pounds

maximum.

4.11.3.1 Transport covers demonstration. Visually inspect cover for permanently attached handles to

allow up to eight-soldier lift. Place a folded LME onto the fully opened cover, while positioned on the

ground. Perform the transportability demonstration with soldiers wearing cold weather gloves. Verify

a secure, comfortable interface with operators’ hands. Repeat the transportability demonstration

without gloves and verify no abrasions, pinching or other uncomfortable conditions on the operators’

hands.

4.11.3.2 Maximum component size measurement. Measure the LME in the transport configuration.

lines, tent pins/stakes, electrical components, dedicated field repair kit, and transport

covers/bags/containers less shipping crates/containers.