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Page Title:
Table 7-4. Bill of Materials for Blocking and Tiedown of Shelters on CONUS General-Purpose Flatcars (Figs 7-5 and 7-6). |
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 TM 55-5811-900-14
Table 7-4. Bill of Materials for Blocking and Tiedown of Shelters on CONUS General-Purpose
Item
Description
Approximate
Quantity
Lumber.....................
Douglas-fir or comparable, straight-grain, free from material defects; Fed Spec MM-
L-751:
2- x 4-in ...........................................................................................................................
40 lin ft.
2- x 6-in ...........................................................................................................................
42 lin ft.
Nails.........................
Common, steel, flathead; bright or cement-coated; type II, Fed Spec FF-N-105:
30d ..................................................................................................................................
102.
40d ..................................................................................................................................
28.
Thimbles .................
Standard, open-type, -in ..............................................................................................................
16.
Clamps ....................
Wire rope, U-bolt clips, saddled, single-grip, forged steel, Crosby heavy-duty, or equal;
48.
Fed Spec FF-C-450: -in.
Shackles .................
Anchor shackle, screw-pin; type VI, class 1, Fed Spec RR-C-271: 7/8-in.
(1-in.-dia. 8.pin), NSN 4030-00-162-9668.
Wire rope ................
6 X 19 IWRC, improved plow steel, preformed, regular-lay; table X, Fed Spec RR-W-
190 ft.
410: -in.
Table 7-5. Application of Materials for Blocking and Tiedown of Shelters on CONUS
General-Purpose Flatcars (Figs 7-5, 7-6).
Item
No. Reqd.
Application
A
--
Brake wheel clearance required is 6 inches above, in back of, and on both sides of the wheel
and 4 inches underneath the wheel (fig 7-5).
B
2
Side blocks. Each to consist of two pieces of 2 x 4 x 120-inch lumber. Locate the bottom
pieces longitudinally against the side of shelter, and nail them to the car floor with 30d
nails spaced about 8 inches apart. Nail the top pieces to the bottom pieces in like manner.
C
2
End blocks. Each to consist of two pieces of 2 x 6 x 84-inch lumber. Locate against the front
and back of shelter and nail same as in item B.
D
8
Wire rope. Each to consist of one piece of -inch wire rope, length as required. Form a
complete loop between each shackle and appropriate flatcar stake pocket. (Wire-rope
ends should overlap a minimum of 24 inches. The angle of tiedown must not be greater
than 45)
.
E
48
Clamps. Place four on each wire at the overlap area and space 3/2 inches apart, with a
minimum of 6 inches from each end of the wire rope (sketch 1, fig 7-3). Tension the wire
rope and tighten the clamps. Use one clamp to secure each thimble to the wire rope at the
stake pocket and shackle.
F
16
Thimbles. Place one thimble on wire rope at each stake pocket and shackle. Secure each
thimble with one item E.
G
8
Shackle. Attach one shackle to each tiedown provision.
H
4
End cleats. Each to consist of two 2 x 6 x 30-inch lumber. Locate cleats perpendicular to end
blocks. Nail the first piece of lumber to the car floor with seven-30d nails. Nail the second
piece with seven 60d nails.
Table 7-6. Bill of Materials for Blocking and Tiedown Trailer Support Unit on CONUS
Item
Description
Approximate
Quantity
Lumber ......................... Douglas-fir or comparable, straight-grain, free from material defects; Fed Spec MM-
L-751: ...................................................................................................................................
2- X 4-in ..........................................................................................................................
48 lin ft.
2- x 8-in ...........................................................................................................................
4 lin ft.
Nails.............................. Common, steel, flathead; bright or cement-coated; type II, Fed Spec FF-N-105: 20d ..................
130.
Wire rope ..................... 6 X 19 IWRC, improved plow steel, preformed, regular-lay; table X, Fed Spec RR-W-
80 ft.
410: -in. .............................................................................................................................
Clamps.......................... Wire rope, U-bolt clips, saddled, single-grip, forged steel, Crosby heavy-duty, or equal;
68.
Fed Spec FF-C-450: -in....................................................................................................
Thimbles ....................... Standard, open-type, -in ...........................................................................................................
20.
7-12
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