Table 6-1. Bill of Materials for Blocking and Tiedown of an M9 ACE in the Hold of a General Cargo Vessel
Douglas-fir, or comparable, straight grain, free from material defects; Fed
65 linear feet
Spec MM-L-751H: 4- x 6-inch
Common, steel; flathead, bright or cement-coated; para 188.8.131.52, Fed Spec
Type I, general purpose; class 2, 6 x 19, improved plow steel, wire strand care
or IWRC: Fed Spec RR-W-410: 5/8-inch
Wire rope, U-bolt clips, saddled, single-grip, forged steel, Crosby heavy-duty,
or equal; Fed Spec FF-C-450D: 5/8-inch
Table 6-2. Application of Materials for Blocking and Tiedown of an M9 ACE in the Hold of a General Cargo Vessel (Fig 6-2)
Side blocking. Each consists of one piece of 4- x 6-inch x length-cut-to-fit lumber. Place one
piece on each side of vehicle against vehicle treads.
End Mocking. Each consists of one piece of 4- x 6-inch x length-cut-to-fit lumber. Place on
top of item A, against vehicle treads.
Toenail to item A.
Backup cleats, 4- x 6- x 12-inch lumber. Place on top of item A, against item B.
Toenail to item A.
Cleats, 4 x 6- x 24-inch lumber. Place against item A and secure to side blocking with ten
Wire rope, 5/8-inch. Run each cable, in a complete loop, through vehicle tiedown shackle
and deck padeye. Ensure sufficient overlap for clamps.
Clamps, 5/8-inch. Place four clamps over each cable loop overlap area and space 3-1/2
inches apart with a minimum of 6 inches from ends of cable.
e. Special Design. Seatrain trailer vessels,
RORO vessels, landing ships, and attack cargo
vessels are equipped with patented lashing gear
and pre-positioned fittings in the deck. This on-
board restraint equipment is considered adequate
for the M9 ACE, and no further blocking or
bracing is required.
6-5. Barges and Lighters
When the M9 ACE is moved by barge or similar
lighterage to or from vessels secured to piers or at
a sheltered anchorage, blocking and chocking ma-
terials will be required. When the M9 ACE is
moved for extended distances or through rough
waters, tiedown restraints must also be used.
6-6. Landing Ships, Landing Craft,
and Amphibious Vehicles
When the vehicle is moved for extended distances
or through rough waters, blocking and tiedowns
must be used. In most cases, the vessels are
equipped with turnbuckles with a sheeps foot on
one end that fits into a deck cloverleaf. If these
materials are not provided, a suitable substitute
may be used.