Table 5-1. Bill of Materials for Blocking and Tiedown of LACV-30 Components on Semitrailers

TM 55-1930-218-14

Figure 5-7. Blocking and tiedown of LACV-30 control cabin, bow fenders, and load spreader pallets with peripheral trunk

and cargo net on flatbed trailer.

Table 5-1. Bill of Materials for Blocking and Tiedown of LACV-30 Components on Semitrailers

Approx.

Item

Description

Quantity

Lumber

Douglas fir, or comparable, straight-grain, free from material defects; Fed Spec MM-L-751H:

1-x 4-inch

358 linear ft

4- x 4-inch

40 linear ft

6- x 8-inch

3 linear ft

Plywood

1/2-inch x 4- x 8-foot sheets

Styrofoam

Beadboard, 4-inch x 4 x 8-foot (may also be supplied in 4-inch x 2- x 8-foot sheets)

55 sheets

Nylon straps

CGU-1/B tiedown device, 20-foot-long, 5,000-lb-capacity, or equal

Strapping

Steel, high tension; Fed Spec QQ-S-781H, type I or IV, 1 1/4- x .035-inch

1,170 ft

Seals

Steel strapping; Fed Spec QQ-S-781H, type D

228

Wire rope

6x19 IWRC; improved plow steel; preformed, regular-lay; table X, Fed Spec RR-W-41OC: 3/8-inch

72 ft

Clamps

Wire rope, U-bolt clips, saddled, single-grip, steel, Crosby heavy-duty, or equal; Fed Spec FF- C-

450D: 3/8-inch

Thimbles

Standard, open-type: 3/8-inch

Turnbuckles

Eye-and-eye, galvanized, weldless, drop-forged, 5/8-inch eyes, 12-inch take-up

Nails

Common, steel; flathead; bright; table XI-b, Fed Spec FF-N-105B: 40d

Table 5-2. Application of Materials for Tiedown of LACY-30 Components in Figure 5-1

Item

No.

Application

Required

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

sectionalized components to protect the hinge attachment points and to provide separation of the components

from the trailer deck. Position between stacked components to protect the hinge attachment points and to

provide separation between components. Arrange so that approximately 50 to 60 percent of all bottom

surfaces rest on the Styrofoam Beadboard. Position between vehicle ramps and the air management system

(AMS) module before instating item B.

Nylon straps, 2-inch x 20foot. Using three straps, form a complete loop around both vehicle ramps and

tighten securely. The remaining two straps are joined. Attach one end to the air management system (AMS)

frame underneath one vehicle ramp, pull through the AMS framework across both vehicle ramps, and attach

to AMS frame underneath the vehicle ramp on opposite side.

Strapping boards, 1- x 4-inch x cut-to-length. Position under steel straps (item D) across tops of modules and

on sides of modules where straps would otherwise contact modules.

Steel straps, 11/4- x .035-inch x cut-to-length. Position as shown in figure 5-1. Each strap is fabricated by

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

the strap and the trailer stake pocket. The loops are formed by attaching a seal (item F) at the overlap areas

(detail 3, fig 7-10). Overlap the two lengths of strapping at the top of the load, tighten, and seal. All seals

must have two pairs of crimps (detail 4, fig 7-10). Secure steel strapping to strapping boards (item C) with

staples or nails.

Pad, 1 14- x .035 x 18-inch steel strap. Position under and seal to item D at each trailer stake pocket (detail

3, fig 7-10).

Seal, steel strapping. Required for joining strapping at each joint (detail 4, fig 7-10) and for securing each pad

C(item E) to strap.

5-5