MIL-DTL-549L
*3.2.5 Steel plate. Steel plate shall conform to ASTM A 827 except that the composition shall
be SAE 1015 through SAE 1030.
3.2.6 Marking ink. The marking ink shall be black in color conforming to type I or II of A-A-
1558 or type II or III of A-A-208.
3.2.7 Metal fasteners. Rivets, wood screws, bolts, nuts and washers shall be of commercial
grade conforming to types and sizes as specified on the applicable drawings.
3.3 Construction. The construction shall conform in all respects to the drawings listed in
section 2 and shall be as specified herein.
3.3.1 Ferrules and sleeves. Sleeves shall be fabricated of steel tube specified in 3.2.2 or steel
sheet or strip specified in 3.2.3. Ferrules shall be fabricated of steel specified in 3.2.2, 3.2.3 or 3.2.4.
Ferrules and sleeves shall be driven fit where specified on the drawings.
3.3.2 Poles. Wood used in the fabrication of the tent poles shall conform to the requirements
of 3.2.1. The wood components shall be cut in the direction of the grain and shall be smoothly surfaced
on all faces. Wood components shall be free of decay, split, wane, unsound knots and other defects.
Other defects shall be limited as follows:
a. Irregularity of grain. Local irregularity of grain shall not exceed one-third the
inscribed diameter on a type I pole or one-third the width of face on which it
occurs on a type II pole.
b. Knots. Naturally sound, tight knots shall not exceed one-third the inscribed
diameter on a type I pole or one-fourth the width of face on which they occur on a type II pole and shall
be at least 12 inches apart.
(1) The knot holes are cleaned out and are free of any bark, pitch and sap.
(2) The cleaned knot holes are completely filled with an epoxy filler.
(3) The epoxy fillings within the holes are sound, tight and shall not exceed the
dimensional requirements of sound, tight knots as specified herein.
c. Holes. Holes shall not exceed 1/16 inch in diameter and shall not occur within 2
inches of each other.
d. Bark and pitch pocket. Bark and pitch pocket shall not exceed 1/8 inch in width
and 8 inches in length, or ¼ inch in width and 4 inches in length. There shall be not more than two such
permissible pockets in any pole or section of pole.
e. Checks. Surface checks shall not exceed 1/32 inch in width and 10 inches in length.
There shall be not more than two such permissible surface checks in any pole or section o pole, and
they shall be located at least 24 inches apart.
f. Shakes. Shakes shall be limited in the same manner as checks.
g. Warp. Warp shall be measured from a line drawn end to end of the piece and shall
not exceed 1/32 inch for each foot of length of any pole or section of pole.
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