Table 7-2. Continued
wire rope (detail 1, fig 7-3). Tension the wire rope and tighten the clamps to 95 foot-pounds. Use
one clamp to secure each thimble to the wire rope at the stake pocket and shackle (fig 7-3).
Thimbles. Place one thimble on the wire rope at each stake pocket and shackle.
Same as item H.
Wheel blocks. Each consists of six 2- x 6- x 16-inch lumber. Cut and assemble each block as
shown in detail 1, figure 7-3. Place the blocks between the road wheels (two on each track).
The load, as shown, is based on a flatcar with a width of 10 feet 6 inches.
Handbrakes must not be set.
Tensioning of wire rope can be accomplished with an applicable sized come-along mechanical hoist or equal
For further details, see General Rules 1, 2, 3, 4, 5, 9, 14, 15, 19A, and 19B, Section No. 1, General Rules
Governing the Loading of Commodities On Open Top Cars, published by the Association of American Railroads.
Table 7-3. Bill of Materials for Blocking and Tiedown of CUCV on Wood-Deck Flatcar (Fig 7-2)
Douglas-fir, or comparable, straight-grain, free from material
defects; Fed Spec MM-L-751: 6- x 8-inch
8 linear feet
2- x 6-inch
8 linear feet
2- x 4-inch
16 linear feet
Common, steel, flathead; bright or cement-coated; Fed Spec
Wire rope, U-bolt clamps, saddled, single-grip, steel, Crosby
heavy-duty, or equal; Fed Spec FF-C-450: 3/8-inch
6 x 19, IWRC; improved plow steel; preformed, regular-lay;
table X, Fed Spec RR-W-410: 3/8-inch
waterproof paper, burlap, or other suitable material
Table 7-4. Application of Materials for Blocking and Tiedown of CUCV on Wood-Deck Flatcar (Fig 7-2)
Brake wheel clearance. Minimum clearance required is 6 inches above, in back of, and on
both sides of and 4 inches underneath the wheel. Also required is a 12-inch minimum
clearance from end of car to load, from center of brake wheel to side of car, and 6 feet above
car floor (fig 7-2).
Chock block (detail 1, fig 7-3). Place 45° portion of block against front and rear of each wheel
as shown in figure 7-2. Nail heel of block to car floor with two 40d nails.
Cushioning material (detail 2, fig 7-3). Locate so that material is under item D and extends 2
inches above item D, between tires and item D.
Side blocks (detail 2, fig 7-3). Each consists of one piece of 2- x 6- x 24-inch lumber and two
pieces of item H, 2- x 4- x 24-inch lumber. Nail 2- x 6- x 24-inch piece to edge of lower 2- x
4- x 24-inch piece with four 12d nail. Place 2- x 6- x.18-inch piece against cushioning
material and tire, and nail to car floor in a staggered pattern through 2- x 4- x 18 inch piece
with four 20d nails. Nail upper 2- x 4- x 24-inch piece to lower piece with four 20d nails.
Tiedowns (detail 3, fig 7-3). Each consists of one piece of 3/8-inch 6 x 19, IWRC wire rope,
length as required (about 15 feet). Form a complete loop between truck tiedown and
appropriate stake pocket at a maximum angle of 45°. Wire rope should overlap about 20