T M 5 5 - 2 4 2 0 - 2 2 4 - 1 4
Table 7-1. Bill of Materials for Blocking and Tiedown of the SEE and HME on a CONUS
General-Purpose Flatcar (Figs 7-1 and 7-2)
Approximate
Item
Description
Quantity
Lumber
Nails
Thimbles
Clamps
Protective
material
Wire rope
Cushioning
material
Douglas-fir, or comparable, straight-grain, free from material defects; Fed
Spec MM-L-751H:
2- x 4-inch
2- x 6-inch
2- x 12-inch
6- x 8-inch
Common, steel; flathead; bright or cement-coated; Fed Spec FF-N-105B:
12d
20d
30d
40d
Standard, open-type: 1/2-inch
Wire rope, U-bolt clips, saddle, single-grip, steel, Crosby heavy-duty, or equal;
Fed Spec FF-C-450: 1/2-inch
5/8-inch
Waterproof paper, burlap, or other suitable material
6 x 19, IWRC; improved plow steel; preformed regular lay; table X, Fed Spec
RR-W-410C: 1/2-inch
Felt, Padding, Sheet
36 linear feet
12 linear feet
16 linear feet
16 linear feet
20
58
40
40
18
42
18
as required
200 feet
2 Each
Table 7-2. Application of Materials for Blocking and Tiedown of the SEE and HME on a CONUS
General-Purpose Flatcar (Figs 7-1 and 7-2)
Item
No. Required
Application
A
Brake wheel clearance. Minimum clearance required is 6 inches above, in back of, and
on both sides of, and 4 inches underneath wheel.
B
8
Blocks (detail 1, fig 7–3). Each consists of one piece of 6- x 8- x 24-inch lumber, cut as
wheel, and nail heel of block with five 40d nails.
C
4
Side blocks. Each consists of one piece of 2- x 6- x 36-inch lumber and three pieces of 2-
x 4- x 36-inch lumber (detail 2, fig 7-3). Nail one edge of the 2- x 6- x 36-inch piece to
the bottom 2- x 4- x 36-inch piece with five 12d nails. Then, place against tire and
cushioning material (item D) and nail to car floor through the 2- x 4- x 36-inch piece
with four 20d nails. Nail the other two 2- x 4- x 36-inch pieces to the one below in the
same manner.
D
E
F
1
8
42
Protective material. Place bottom portion under item C. The top portion should extend 2
inches above item C (detail 2, fig 7–3).
Wire rope. Each to consist of one piece 1/2-inch wire rope, length as required (about 18
feet). Form a complete loop between tiedown provision and the appropriate stake pocket
(detail 3, fig 7-3). Wire rope ends should overlap a minimum of 24 inches.
Clamps, 1/2-inch. Except for items H, J, K, and M, place four 1/2-inch clips on each
1/2-inch wire rope at the overlapped area, and space 3 inches apart, with a minimum of
6 inches from ends of cable. For items H, J, K, and M, place two 1/2-inch clips on each
1/2-inch wire rope at the overlap area, and space 3 inches apart, with a minimum of 6
inches from ends of cable. Tighten the nuts on the 1/2-inch clips to a torque of 65
foot-pounds.
G
18
Thimbles, 1/2-inch. Place one at the bottom of each stake pocket and at each tiedown
provision.
7-5
