MIL-DTL-2845E (SH)
to 16 feet. For lengths greater than 16 feet, end butt joints are acceptable.
Butt joints shall be alternated and located only in the end one-third area of
the length.
TABLE III. Size of members for wood containers, shafting
3 inches in diameter and less.1/,2/
Maximum
Shafting
Member sizes
Spacing of
Maximum
Maximum
Maximum
Cross
Cradles
skids
diameter
length
weight
Sides
Ends
(inches)
(inches)
(inches)
(feet)
(pounds)
(inches)
(inches)
1-1/2
12
100
1 by 4
Two 2 by 4
2 by 3
16
1-1/2
14
200
2 by 4
Two 2 by 4
2 by 3
16
2
20
200
2 by 6
Two 2 by 6
2 by 3
18
3
25
300
2 by 8
Three 2 by 8
2 by 4
20
3
16
400
2 by 6
Three 2 by 6
2 by 4
20
3
20
400
2 by 8
Three 2 by 8
2 by 4
20
1/
For tops and bottoms, nominal 1-inch lumber shall be used. When the
width of top and bottom is greater than 7-1/2 inches, 1- by 2-inch battens
spaced approximately 3 feet apart shall be used; or 3/4-inch plywood, end
spliced when required, shall be used in place of lumber.
2/
Cradles shall be of 2-inch material with ¼-inch plywood backing when
shafts exceed 2-inch diameter.
3.15.6.2 Finished shafting and rough machined shaft forgings, greater
than 3 inches in diameter. One shaft complete with accessory parts, when
applicable, shall be cradled on a skid-type base (see figures 14 and 16 and
MIL-C-104 for construction guidance). Unless otherwise specified (see 6.2),
table IV shall apply for skid base size members. Wood materials utilized for
container construction shall be as specified in 3.8.2.2 for multiple trip use.
Shafts and accessory parts where applicable shall be so cradled, mounted, and
secured on the skid base to prevent shaft deflection, shifting, and damage
that may result from storage, handling, and shipment. Skids less than 16 feet
in length shall not be spliced. Laminating and splicing of skids shall be in
accordance with MIL-C-104. End headers shall be placed flush with skid ends
and bolted in place. Flanges shall be enclosed within a box as shown on
figure 14. The flange box shall be of sufficient size to enclose the
packaging specified in 3.15.4.1 or 3.15.4.2. To protect the bottom of the
flange, a nominal 2-inch thick wood member the width of the flange box shall
be secured to the skids directly beneath the flange box.
25
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