DDD-F-416F
inserted between the edges of the duck cloth for a distance of 1 inch so that the ends of the
inserted flag hoist are not exposed. With the turned-in sides and ends of the duck cloth placed
even, the hoist end of the flag and the open side of the heading shall be stitched with 4 rows of
equidistant stitching 1/4 to 3/8 inch gauge (1/8 stitching margin). The flag shall have a distance
line specified in 3.3.6 running through the heading in accordance with the applicable figure for
Type I, Class 1 headings. The line at the top of the heading shall pass through a ring specified
in 3.3.8, doubled back and superimposed upon itself for a distance of not less than 2 inches and
sewn with zig-zag stitches through both thicknesses of the line for a minimum distance of 2
inches. The line shall then be drawn into the heading until the ring is approximately flush with
the outer edges of the heading. The top of the heading shall then be closed by 2 rows of
stitching 1/4 to 1/2 inch gauge, either up to or through the rope. The distance line shall be
secured within the heading by zig-zag stitching at the top, center, and bottom for a minimum of
2 inches at each location. The lower end of the heading shall then be closed by 2 rows of
stitching in the same manner as the top. The snaphook specified in 3.3.8 shall be attached to
the distance line by passing the line through the swivel loop, doubled back and superimposed
upon itself for a distance of not less than 2 inches and sewn by zig-zag stitching for a minimum
of 2 inches. Zig-zag stitching at the top and bottom of the line shall pass through both
thicknesses of the distance line. Prior to zig-zag stitching, the free end of the distance line shall
be fused. The overall length of the extended portion of the distance line and snaphook,
measured from the lower edge of the heading, shall be 24 inches.
3.7.1.2 Class 3 with distance line and galvanized steel thimbles. The Class 3 heading shall be
constructed in accordance with TIOH Drawing 5-1-45G and 3.7.1.1 above except that the
heading shall be fitted with thimbles specified in 3.3.9 so as to provide a loop or eye not less
than 1-1/2 inches in length.
3.7.1.3 Class 2, with grommets. The construction and dimensions for Type I, Class 2 headings
shall be as specified on TIOH Drawing 5-1-45B. The heading shall be made with a piece of
duck cloth 6 inches wide and 5 inches longer than the flag hoist to which it is to be attached.
Both side edges shall be turned-in 1 inch and both ends turned-in 2-1/2 inches. The hoist end
of the flag shall be turned-in 3/4 inch and then inserted 1 inch into the duck cloth strip so that the
ends are not exposed. The raw edges of the ends of the duck cloth strip may be closed with
two rows of stitching using a 1/8 stitching margin. The duck cloth strip shall then be doubled
over to form a finished heading 2 inches wide. With the sides and ends of the duck cloth strip
even, 2 rows of stitching (not less than 3/16 inch stitching gauge, 1/8 stitching margin) shall be
sewn through all thicknesses. Single rows of stitching shall be placed along the centerfold edge
and ends of the duck cloth strip using a 1/8 to 1/4 inch stitching margin. The duck cloth heading
shall be finished by securely clinching 2 grommets, specified in 3.3.7, in the position shown on
TIOH Drawing 5-1-45B.
3.7.1.4 Class 3 with distance line and galvanized steel thimbles. The Class 3 heading shall be
constructed in accordance with TIOH Drawing 5-1-45G. The heading shall be fitted with
thimbles specified in 3.3.9 so as to provide a loop or eye not less than 1-1/2 inches in length.
3.7.1.5 Class 4 with grommets and leather tabs. The construction and dimensions for Type I,
Class 4 heading shall be a specified on TIOH Drawing 5-1-45D. The heading shall be made of
duck cloth specified in 3.3.2 cut 8 inches wide and 5 inches longer than the hoist of the flag.
The hoist end of the flag shall be positioned 1 inch in from the side edge of the duck cloth, 2-1/2
inches from each end and stitched with 1 row of stitching. The side edge of the duck cloth
attached to the flag shall be turned-in 1 inch so that a 1 inch strip of flag material the same
length as the hoist shall be folded inside the turned-in duck cloth fold as shown on TIOH
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