Barges and Lighters.

TM 55-3805-248-14

6-6. landing Ships, landing Craft,

6-5. Barges and Lighters.

and Amphibious Vehicles.

When the tractor-scraper is moved by barge or

similar lighterage to or from vessels secured to

When the vehicle is moved from extended dis-

piers or at a sheltered anchorage, blocking and

tances or through rough waters, blocking and

chocking materials will be required. When the

tiedowns must be used. In most cases, the vessels

vehicle is moved extended distances or through

are equipped with turnbuckles with a sheep's foot

rough waters, tiedown restraints also must be

on one end that fits into a deck cloverleaf; where

not provided, a suitable substitute may be used.

used.

Table 6-2. Application of Materials for Blocking and Tiedown of a Tractor-Scraper in Hold of General-Cargo Vessel (fig 6-3).

Approximate

Quantity

Description

Item

Douglas-fir, or comparable, straight grain. free from material defects: Fed

Lumber

Spec MM-L-751H:

4- x 6-inch

110 linear feet

6- x 6-inch

1 4 linear feet

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

Nails

FF-N-105B:

30d

40d

60d

Type I. general purpose; class 2, 6 x 19. improved plow steel. wire stand core

Wire rope

100 feet

or IWRC: Fed Spec RR-W-410C: 5/8-inch

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

Clamps

or equal; Fed Spec FF-C-450D: 5/8.inch

Table 6-2. Application of Materials for Blocking and Tiedown of a Tractor-Scraper. in Hold of General-Cargo Vessel (fig 6-3).

No. Required

Application

Item

Side blocking for front and rear wheels. 4- x 6,- x 512.inch lumber. Locate at each side of

front and rear wheels; position 50 that the side blocking extends slightly beyond the front

and rear of the vehicle.

End Blocking, 6- x 6 x 132.inch lumber. Locate one piece in front and back of front wheels

and one piece in front and back of rear wheels. Toenail each end to side blocking with four

60d nails.

Cleats, 4- x 6- x 24-inch lumber. Locate against blocks (item B) as indicated in figures 6-3.

and secure each to side blocking (item A) with five 40d nails.

Bracing, 4- x 6- x 24-inch lumber, cut-to-fit (or random length as required). Place ends

against side blocking on both sides of vehicle and against blocking of other cargo, side of

vessel, or other ship's structure, and secure each end with four 30d nails.

Wire rope. SIX-inch. Run each cable, in a complete loop. through vehicle tiedown points and

deck padeyes. Ensure sufficient overlap for clamps.

Clamp, 5/8-inc. Place six clamps over each cable loop overlap area and space 3-3/4 inches

apart. with a minimum of 6 inches from ends of cable Apply 65 foot-pounds of torgue to

the clamp nuts.

6-5