A-A-702A
Padding. Material for the upholstery padding shall be unfilled, high resilient polyurethane foam and shall comply with the requirements in the table below. The padding shall provide a comfortable, proper fitting and durable seat and back. The padding shall be firmly secured to prevent unintentional removal or displacement from its intended position while in use.
Physical properties of slab and molded unfilled, high resilient polyurethane foam in accordance with ASTM D 3574.
|
Property |
Low density |
Medium density |
High density |
|
Indentation Force Deflection- Specified Deflection, 25 percent (lb) |
14-31 |
31-37 |
37-64 |
|
Indentation Force Ratio (64 percent/25 percent) minimum |
1.8 |
1.9 |
1.9 |
|
Constant Deflection Compression Set 22hr/158oF, deflected to 10 percent of its thickness, percent maximum. |
20 percent |
15 percent |
15 percent |
|
Static fatigue at constant deflection, 25 percent indentation force loss, percent maximum |
30 percent |
30 percent |
25 percent |
|
Maximum thickness loss |
5 percent |
5 percent |
5 percent |
|
Density (lb/ou. ft) |
1.4 minimum |
2.7-3.4 |
2.7-4.8 |
Upholstery fabric. The upholstery fabric shall be 100 percent flat nylon, dyed, plain weave, not less than 21 or/linear yd (651 g/linear m), based on 54 in (137 cm) width, exclusive of back coating. The fabric shall conform with Table I of ASTM D 3597 except: minimum breaking strength shall be 250 lb (1112 N) for warp and filling; minimum tear strength shall be 20 lb (89 N) for Double-Head Method using the Taber Abraser (CS#10 wheels, 500 g load) in accordance with ASTM D 1175 for 8,000 cycles without a complete breakthrough of a yarn. Seam efficiency shall be not less than 80 percent when tested in accordance with method 5110 of Federal Method Standard 191. The Fabric shall be securely fastened to prevent unintentional removal.
Fabric colors. The fabric colors shall match the following Government standard samples:
|
Blue/Black |
FSS-F-01005 |
Black/White |
FSS-F-01014 |
|
Black |
FSS-F-01009 |
Sand/White |
FSS-F-01015 |
|
Orange/Rust |
FSS-F-01011 |
Green/Black |
FSS-F-01016 |
|
Black/Brown |
FSS-F-01012 |
Yellow/Gold |
FSS-F-01018 |
|
Red/Black |
FSS-F-01013 |
|
|
Identification marking. The bottom of the chair seat shall be clearly and permanently marked with the following information: manufacturer’s name or trademark, contract or order number, national stock number, and month and year of manufacture.
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