MIL-PRF-44408C
3.3.3.2 Temperature shock. The shelter shall withstand a temperature shock
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from an equilibrium state at 160 to -70 Fahrenheit and from an equilibrium state
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at -70 to 160 Fahrenheit without evidence of structural damage, degradation, or
permanent deformation.
3.3.3.3 Solar load. The shelter shall withstand a solar induced outer roof
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surface temperature of 205 Fahrenheit, while maintaining an internal temperature
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of 85 Fahrenheit, without evidence of structural damage, degradation, or permanent
deformation.
3.3.3.4 Sunshine (ultraviolet effects). The shelter shall show no evidence of
structural damage, degradation, or permanent deformation as a result of exposure
to ultraviolet effects.
3.3.3.5 Humidity. The shelter shall be capable of withstanding daily exposure
of up to 97% relative humidity, and exposure of 100% relative humidity (with
condensation) for short periods of time, without evidence of structural damage,
degradation, or permanent deformation.
3.3.4 Heat transfer. The shelter shall have an overall heat transfer
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coefficient of no more than 0.50 BTU/hr/ft / F.
3.3.5 Blowing dust/sand. The external moving parts of the shelter shall be
designed to resist the effects of blowing dust and sand without degradation.
Blowing sand is defined as 150 - 1000 micron particles in concentrations of 1.32 x
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10 pounds per cubic feet (lbs/ft ) with a wind velocity of 1750 + 250 ft/min.
3.3.6 Watertightness. The completed shelter, without the aide of supplementary
sealing, caulking, taping, etc., shall be capable of withstanding a 40 psig spray
from nozzles located 19 inches from and normal to each external shelter surface.
The shelter shall not allow water leakage into the shelter and shall not gain
weight (see 4.2.1.1).
3.3.7
Detectability.
3.3.7.1 Color and camouflage. Unless otherwise specified (see 6.2), the
shelter shall be the standard color and pattern specified on drawing 13228E1639.
The interior surface of the personnel door shall match the primary exterior color
of the shelter.
3.3.7.2 Blackout. The shelter, with the door closed, shall not permit a light
source from within to emit detectable amounts of light.
3.4 Transportability performance requirements. The shelter and shelter/vehicle
combinations shall not exceed the legal highway size limitations imposed by states
and foreign countries be and shall be capable of obtaining transportability
approval from Military Traffic Management Command Transportability Engineering
Agency (MTMCTEA) based on requirements for transport in the following modes.
3.4.1 Rail transport. The dismounted shelter and shelter/vehicle combinations,
with a simulated payload (see 3.2.1), shall: (1) meet the Gabarit International
de Chargement (GIC) equipment gauge envelope as defined in interface standard MIL-
STD-1366, and (2) shall be capable of withstanding multiple rail impacts without
damage or degradation to the shelter or shelter/vehicle combination, and without
damage to the tiedown cables, or blocking or bracing. (see 4.4.1)
3.4.2 Fixed-wing air transport. The dismounted shelter and shelter/vehicle
combinations, with payload (see 3.2.1) shall be transportable in C-130 and larger
Air Mobility Command (AMC) aircraft. The dismounted shelter shall be capable of
being aircraft loaded while attached to a 463L pallet. The shelter mounted on the
M1097 HMMWV, shall be capable of roll-on/roll-off loading at ramp angles of 15
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