Table 6-1. Bill of Materials for Blocking and Tiedown of Typical 12-Ton Semitrailer in Hold of General Cargo Vessel (Fig 6-2 )

TM 55-2330-200-15-1

c. Materials. Table 6-1 is the approximate bill of

application of materials required to restrain the

materials for blocking and tiedown of a 12-ton

vehicle.

semitrailer. Table 6-2 provides data concerning the

Table 6-1. Bill of Materials for Blocking and Tiedown of Typical 12-Ton

Semitrailer in Hold of General Cargo Vessel (Fig 6-2 )

Approximate

quantity

Description

Item

Douglas-fir, or comparable lumber, straight-grain, free from material defects;

Lumber

Fed Spec MM-L-751H:

2- x 4-in. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

72 linear ft

2- x 12-in. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

54 linear ft

4- x 6-in . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

52 linear ft

Nails

Common, steel; flathead, bright or cement-coated; para 3.6.11.2, Fed Spec FF-

N-105B:

12d . . . . . . . . . . . . . . . . . . . . . . . . 24

30d . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

120

60d . . . . . . . . . . . . . . . . . . . . . . . 10

Type I, general-purpose; class 2, 6x19, improved plow steel, wire strand core

Wire rope

or IWRC; Fed Spec RR-W-410C:

5/8-in.

150 ft

Wire rope, U-bolt clips, saddled, single-grip, forged-steel, Crosby heavy-duty,

Clamps

or equal; Fed Spec FF-C-450D:

5/8-in. . . . . . . . . . . . . . . . . . . . . . . 24

Table 6-2. Application of Materials for Blocking and Tiedown of Typical

12-Ton Semitrailer in Hold of General Cargo Vessel (Fig 6-2)

Item

No. required

Application

Flooring, 2- x 12- x 96-in. lumber. Locate under rear wheels.

Flooring, 2- x 12- x 72-in. lumber. Locate under landing legs.

Side blocking for tandem-axle wheels, 4- x 6- x 108-in. lumber. Locate at side of rear wheels.

Blocks, 4- x 6- x 108-in. lumber. Locate one in front and one in back of tandem-axle wheels.

Toenail each end to side blocking with two 60d nails.

Cleats, 2- x 4- x 24-in. lumber. Locate against block (item D) as indicated in figure 6-2, and

secure each to side blocking (item C) with five 12d nails.

Bracing, 4- x 6-in. x random-length lumber, cut-to-fit. Place ends against side blocking of ot-

as required

her cargo, side of ship, or other ship's structure, and secure each end with four 30d nails.

Stanchion, 2- x 4-in. x random-length lumber. Construct stanchion as shown using 30d nails.

as required

Place under kingpin for aditional support.

Wire rope, 5/8-in. Each cable will form a complete loop between vehicle tiedown provisions

and deck padeye.

Clamps, 5/8-in. Place four clamps over each cable loop at the overlap area and space 3 in.

apart with a minimum of 6 in. from ends of cable (detail 4, fig. 7-2).

bracing is required. For movement by barge or

6-4. Special Design Vessels

similar lighterage, the trailers must be blocked and

Seatrain/trailer vessels, roll-on/roll-off ships,

braced. When transporting semitrailers over ex-

landing ships and attack-cargo vessels are equipped

tended distances on rough water, semitrailers loaded

with patented lashing gear and prepositioned fit-

aboard landing craft and amphibious lighters should

tings in the deck. When transporting semitrailers

be lashed, blocked, and braced.

aboard such vessels, use of the onboard restraint

equipment is adequate, and no further blocking or

6-5