MIL-DTL-2427H (AR)
TABLE II. Average spacing of nails (Except for nailing top and bottom to sides)
Average spacing
Size of Nails
Average spacing for
nailing cleats to ends,
cleats (inches)
(inches)
to ends and end
or for nailing top and
for nailing sides
bottom to ends
sides, top or bottom
6d or smaller
1¾
1½
7d
2
1¾
8d
2¼
2
9d when specified on
drawing (dwgs)
2½
2¼
10d when specified on dwgs
3
2½
12d when specified on dwgs
3½
2¾
16d when specified on dwgs
4
3¼
20d when specified on dwgs
4½
3¾
a. Each board in the side, top, or bottom shall have at least two nails at each
nailing end. Top, bottom and sides shall be secured to the end board of the end assembly
by not more than one half of the total required number of nails driven into the end and the
remaining one half or greater into the cleat. Nails shall be located as shown in figures 1,
8 and 9.
b. The nails holding the bottom to the sides shall be spaced between six and eight
inches apart. When the top is not fastened with hardware, the nails holding it to the side
shall be spaced the same as for the bottom. When using 1/2 inch lumber, tops and
bottoms shall not be nailed to sides.
c. The nails for fastening cleats to ends and tops (or sides and bottom when
specified) shall pass through both parts and be clinched not less than 1/8 inch. The nails
in each cleat shall be driven in two rows spaced as given in Table I and located as shown
on figure 1, 8 and 9. Each board of an end shall be nailed to each end cleat with not less
than two nails.
d. Each board comprising a top or cover shall be secured to each top cleat by
nailing in accordance with Table I as follows. At least two nails shall enter through the
top cleat and into the outer board utilized for each lengthwise edge of the top. At least
one nail shall enter through the top cleat into each board utilized for the center portion of
the top.
3.7.4 Alternative fasteners.
a. Staples may be used as an alternative to nails for fastening cover cleats to cover
boards. The number of staples used shall be equal to the number of nails required.
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