MIL-S-62549(AT)
3.7 Painting. All semitrailers shall be painted to provide a low reflectance CARC surface. The camouflage pattern will be supplied by the Government in accordance with Drawing
13226E7194. The final painted surface shall be three color camouflage pattern applied in two coats at least 1.8 mils thick (total), without sags, runs, or thin areas and shall conform to
MIL-C-46168 or MIL-C-53039. The three color pattern segments required shall be as follows:
a. 41 ± 5% of the surface area shall be of the color black, conforming to chip 37030 of
FED-STD-595.
b. 15 ± 5% of the surface area shall be of the color camouflage brown 383, conforming to chip 30051 of FED-STD-595.
c. 44 ± 5% of the surface area shall be of the color camouflage green 383, conforming to chip 34094 of FED-STD-595.
3.7.1 Cleaning and treating. The semitrailer and components shall be cleaned and treated in accordance with MIL-STD-193 except that all hardware and trim not normally painted shall be treated to provide a matte finish. In addition, contact areas of ferrous sheet metal 0.125 inch thickness and under, which cannot be primed after welding or are not zinc clad steel, shall be cleaned in accordance with TT-C-490 and primed in accordance with MIL-P-46105.
3.8 Rustproofing. The semitrailer shall be rustproofed in accordance with MIL-R-46164.
3.9 Welding. Welding shall not be employed as a repair measure for defective parts.
Welding procedures shall be in accordance with MIL-STD-1261. Weld penetration shall be such as to provide transfer of maximum design stress through base metals. Fillet welds shall be provided when necessary to reduce stress concentration.
a. Weld joint design and construction shall provide adequate material for transferral of load through the joint from one member to another without significant increase in stress.
b. All welders shall be tested and qualified and submit specimens (samples or actual parts) simulating all welding conditions. Specimens shall be available to the government quality assurance representative for each welder prior to performing production welding. The government quality assurance representative may require requalification of welders, welding equipment operators or equipment to the recorded welding procedures when the quality is suspect based on inspection results.
3.10 Marking. The semitrailer exterior markings shall be placed and sized in accordance with MIL-STD-642. Markings, letters and numbers on the semitrailer shall be lusterless paint conforming to MIL-C-53039 or MIL-C-46168. Black chip 37030 of FED-STD-595 shall be used over a green or brown background. Camouflage green 383, chip 34094 of FED-STD-595, shall
be used over black background.
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