MIL-DTL-82288C
3.3.2 Type II Tarpaulin. The size of the Type II tarpaulin shall be as specified in 1.2. The
design of the Type II tarpaulin shall be in accordance with figure 1. The tarpaulin shall be
fabricated from lengths of the specified base fabric with heat-sealed or cemented seams. The
tarpaulin shall have a turn under hem and be furnished with grommets as specified in 3.2.3 and
attached as in figure 2.
3.4 Construction. The construction of the tarpaulins shall conform to figures 1 and 2 and the
requirements herein.
3.4.1 Type I, Tarpaulin.
3.4.1.1 Width. The type I tarpaulin shall be made of four (4) widths of material specified in
3.3.1 and shall be constructed by heat sealing along their warpwise edges so that the overall
width shall measure 16 feet (+5 inches - 1 inch).
3.4.1.2 Length. The finished length of the type I Tarpaulin shall be 100 feet (+3 ft.0 ft.). The
parallel outer edges of the tarpaulin shall measure within 2 feet of each other.
3.4.1.3 Splices. Each width of basecloth heat sealed together shall consist of not more than two
(2) unbroken continuous lengths, heat sealed together in the same manner as the long sides and
as specified in 3.4.1.4. None of the pieces so spliced shall be less than seven (7) yards in length.
Splices shall be so staggered that on adjacent widths the splices are not less than 18 inches apart.
*3.4.1.4 Seams. Type I Tarpaulin seams shall be constructed by the use of a heat sealing
apparatus or machine. The fused zone shall be not less than ¾ inch wide and shall be uniform in
appearance. The seam shall extend along the entire length of the tarpaulin. The excess material
along the edge of the seam on both face and back shall not exceed ¼ inch and shall not contain
any brittle or excess materials. The strength of the seam shall not be less than 150 pounds per
inch when Type I, Class 2, Form 1 of A-A-55308 is used and not less than 70 pounds per inch
when Type II, Class 2, Form 1 fabric of A-A-55308 is used. If the seam strength is not
measurable because the base fabric itself is breaking while the heat sealed seam remains intact,
the seam strength shall be considered acceptable, provided the base fabric itself meets the break
strength requirement of A-A-55308. Testing shall be as specified in 4.5. Heat sealed seams
shall be smooth, fully adhered throughout their lengths and shall be free of puckers, air pockets
or tunnels. As an alternate to heat sealing, any other suitable method except stitching may be
used provided the above requirements are met.
3.4.1.5 Heat sealed sheet.
3.4.1.5.1 Area. The area of each heat sealed sheet shall be computed individually
and recorded on its shipping container in square feet. When the unit of purchase is a square foot,
the computed area shall be the basis for invoicing. The formula below shall be used to compute
the area of each sheet (reported to the nearest square foot):
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