Table 7-4. Application of Materials for Blocking and Tiedown of LACV-30 Components Shown in Figure 7-3

TM 55-1930-218-14

Table 7-3 - Continued

Item

No. required

Application

Chock blocks (detail 1, fig 7-10). Locate flat portion of the block against both sides of the modules. Spaces

shown in figure 7-2. Before nailing, install filer strips (item C). Nail heel of block to car floor with three 40d

nails, and toenail both sides of block to car floor with two 40d nails.

Filler strips. Cut 14 pieces of 2- x 4- x 10-inch lumber and install between the sides of the modules and the

upper face of the chock blocks. The filer strips serve as bearing plates for the face of the chock blocks and

prevent pressure from being placed against the flange of the module.

Wire rope, 3/8-inch. Locate as shown in figure 7-2. Form a complete loop through the railcar stake pocket and

one eye of the turnbuckle (item G). Form a complete loop through the tiedown point of the module and the

other eye of the turnbuckle. The ends of both loops of the wire rope must overlap at least 15 inches.

Clamps, 3/8-inch. Secure the ends of the wire rope at the overlap area with four clamps spaced 21/4 inches

apart, leaving a minimum of 6 inches from ends of rope. Place one additional clamp to secure thimble (item

F) and wire rope together at stake pocket (detail 2, fig 7-10).

Thimble, open-type, 3/8-inch. Place one at bottom of each stake pocket where wire rope passes through

(detail 2, fig7-10). Attach thimble to wire rope with one clamp (item E).

Turnbuckles, 5/8-inch eyes. Tighten the tumbuckles until wire-rope loops are tensioned enough to cause a

slight depressing of styrofoarn Beadboard under the load. DO NOT OVERTIGHTEN. Wire-tie turnbuckles to

prevent loosening during transit.

Strapping boards, 2- x 4- x 10-inch lumber, beveled to fit top edges of modules. Position under steel straps

(item K) to protect flanges and comers of modules.

Risers, 2- x 4-inch x 10-foot lumber. Position underneath and between stacked, crated propellers to permit

handling by forklift.

Steel straps, 1 1/4- x .035-inch x cut-to-length. Position as shown in figure 7-2. Each strap is fabricated by

looping a length of strapping through the stake pocket on each side of the railcar, with a pad (item L) between

the strap and the railcar stake pocket. The loops are formed by attaching two seals (item M), butted together,

at least 18 inches above the railcar stake pocket (detail 3, fig 7- 10). Overlap the two lengths of strapping at

the top of the load, tighten, and join with two seals (item M) butted together. All seals at strapping joints must

have two pairs of crimps per seal (detail 4, fig 7-10).

Pad, 1 1/4- x .035- x 18-inch steel strap. Position under and seal to item K at each stake pocket (detail 3, fig

7-10).

104

Seals, steel strapping. Two seals required for joining strapping at each joint (detail 4, fig 7-10). One seal

required for securing each pad (item L) to strap.

as required

Bracing. Consists of 2- x 8-inch x cut-to-length lumber. Brace as required between modules to prevent fore-

and-aft movement. Secure to car deck and to other bracing with 40d nails. Lumber for this requirement not

included in table 7-1.

Table 7-4. Application of Materials for Blocking and Tiedown of LACV-30 Components Shown in Figure 7-3

Item

No. required

Application

Styrofoam Beadboard, 4-inch x 4- x 8-foot sheets, or 4-inch x 2- x 8-foot sheets. Distribute beneath the aft center

module with midcraft center buoyancy box to protect bottom of the module. Position between aft end of the

module and the railcar bulkhead. Arrange so that approximately 50 to 60 percent of the bottom surface of the

module rests on styrofoam beadboard.

Chock blocks (detail 1, fig 7-10). Locate blocks against both sides of the module, spaced as shown in figure 7-3.

Place two blocks against the forward end of the midcraft center buoyancy box. Before nailing, install filer strips

(item C). Nail heel of block to car floor with three 40d nails, and toenail both sides of block to car floor with two

40d nails. Locate two chock blocks against each end of the pallet holding the flexible trunk system and nail to

the car floor as above.

Filler strips. Cut 10 pieces of 2- x 4- x 10-inch lumber and install between the module and the upper face of the

chock blocks. The flier strips serve as bearing plates for the face of the chock blocks and prevent pressure from

being placed against the flange of the module.

Risers, 4- x 4-inch x 6-foot lumber. Position underneath unitized load spreaders and tracks to permit handling by

forklift.

Bulkhead blocking. Cut two pieces of 2- x 8- x 48-inch lumber and place on edge against the stair-stepped ends

of the stacked and banded load spreaders and tracks. Position two pieces of 4- x 4-inch x cut-to-length lumber

between each of the 2- x 8- x 48-inch pieces and the railcar bulkhead. Toenail to the bulkhead and to the 2- x 8-

x 48-inch pieces with two 20d nails on each side.

End braces. Position two pieces of 4- x 4- x 24-inch lumber against the end of the load spreaders, and toenail to

the railcar floor with four 40d nails through each end. Position upright pieces of 2- x 8- x 24-inch lumber against

the load spreaders and nail to each 4- x 4- x 24-inch piece with four 20d nails. Complete the braces by nailing

pieces of 2- x 8-inch x cut-to-4ength lumber to the top of the upright pieces and to the 4- x 4- x 24-inch pieces

with four 20d nails at each end.

Strapping boards, 1- x 4-inch x cut-to-length lumber. Position under steel straps (item J).

Strapping boards, 2- x 4- x 10-inch lumber, beveled to fit top edges of module. Position under steel straps (item

J) to protect flanges and corners of module.

Steel straps, 1 1/4- x .035-inch x cut-to-length. Position as shown in figure 7-3. Each strap is fabricated by

looping a length of strapping through the stake pocket on each side of the railcar, with a pad (item K) between

the strap and the

7-9