MIL-PRF-32504
4.6.5 Temperature verification: Perform the cold temperature operational demonstration or the shelter
components demonstration for cold temperatures. Perform the shelter components demonstration for high
temperatures on separate samples.
4.6.5.1 Cold temperature operational demonstration: Select operational components such as full width
end door fabric, full width electric winch operation, personnel door closer for cold weather operations.
Perform test procedures in accordance with MIL-STD 810 502.5 Basic Cold C-1. Ensure full operations
with no loss of functionality or evidence of damage.
4.6.5.2 Shelter components demonstration: Perform the fabric components test and the fasteners test
with the cold and hot conditions as defined below.
4.6.5.3 Cold temperature conditioning: Specimens of each type of fabric shall be in accordance with
performance tests. Condition fabric specimens for 4 hours at -25o F (+/- 5o F).
4.6.5.4 Hot temperature conditioning: Specimens of each type of fabric shall be in accordance with
performance tests. Condition fabric specimens and fasteners for four hours at 160o F (+/- 2o F).
4.6.5.5 Fabric components test: Test samples of exterior weather barrier fabric and samples of
insulating liner material if applicable. Test in accordance with ASTM D2136 Low temperature Bend
Test. Pass at -40o F with no cracking, delamination or crazing of fabric. Test in accordance with ASTM
G155, Weathering Resistance of Coated Fabrics. Pass at 160oF with no delamination, cracking or crazing
of fabric or test in accordance with Accelerated Weather Test AATCC Method 169, Xenon exposure or
UV exposure test. Pass with no degradation from initial performance in Breaking Strength, Coating
Adhesion, Tongue Tear, Grab or Strip Tensile, Flame Resistance or Dead Load Capacity.
4.6.5.6 Fasteners test: While in the conditioning environment, operate each distinct type of fastening
device after the exposure period for 25 cycles. Verify no binding or deterioration of performance.
4.6.6 Humidity compatibility demonstration: All end door hardware, light fixture components in
addition to weather and insulating liner fabric samples shall be subjected to 95% humidity levels at a
1400F minimum temperature in accordance with Mil-Std 810G Method 507.5 Procedure II Aggravated
cycle for a minimum of 10 24-hour test cycles. After cycling has been completed, components are to be
inspected. Failure shall be indicated by any evidence of delamination, cracking, corrosion or
deterioration to any component and any malfunction of hardware.
4.6.8 Sunlight resistance demonstration: If the accelerated weathering demonstration (4.6.5.5) was
performed as part of the verification process, no additional verification is required. If durability was
verified by analysis, perform the sunlight resistance test. Certification for fabric components is
acceptable.
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