T M 5 5 - 2 4 2 0 - 2 2 4 - 1 4
Table 6-1. Bill of Materials for Blocking and Tiedown of a Typical SEE, HME,
and HMMH in General-Cargo Vessel (Fig 6-2)
Eye-and-jaw type, 3/4-inch diameter x 10-inch takeup or equal
Douglas-fir, or comparable, straight-grain, free from material defects; Fed Spec
MM-L-751H: 4- x 6-inch
8 linear feet
6- x 8-inch
101 linear feet
(Does not include lumber for side blocking)
Common, steel; flathead; bright or cement-coated; Fed Spec FF-N-105B: 40d
6 x 19, IWRC; improved plow steel; performed, regular-lay; table X, Fed Spec
Wire rope, U-bolt clips, saddled, single-grip, steel, Crosby heavy-duty, or equal;
Fed Spec FF-C-450: 1/2-inch
Table 6-2. Application of Materials for Blocking and Tiedown of a Typical SEE, HME, and
HMMH in General-Cargo Vessel (Fig 6-2)
Side blocking. Each consists of 6- x 8- x
of tractor against outside of tires.
End blocking. Each consists of 6- x 8-
260-inch* lumber. Place one piece on each side
x 100-inch* lumber. Place on top of item A,
against front and rear of front wheels and rear wheels. Toenail to item A with four 40d
nails, two in the side and two in each end.
Backup cleats. Each consists of 4- x 6- x 12-inch lumber. Place one on top of each item
A against item B. Toenail to item A with four 30d nails, one in each side and two in the
Wire rope. Form a complete loop through each shackle and the eye of a turnbuckle.
Overlap wire rope ends at least 24 inches.
Clamps. Place three on each wire rope at the overlapped area and space 3 inches apart,
with a minimum of 6 inches from ends of wire rope. Evenly tighten clamps to a torque
of 65 foot-pounds.
Turnbuckles. Attach jaw end to padeye in deck. Tighten as required.
Bracing. Consists of 6- x 8-inch lumber, cut-to-fit. Brace as required against adjacent
vehicle blocking, cargo, or vessel bulkhead. Secure each end of each piece to adjacent
blocking by toenailing with four 40d nails. Lumber and nails for this requirement are
not included in table 6-1.
Padeye. Six required on floor of vessel.
Shoring. Each consists of 6- x 8- x 36-inch lumber. Place under front bucket on both
left and right side of center of bucket. Secure shoring to bucket with wire.
*Approximate lengths may be cut-to-suit.