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Page Title: Appendix I. RAIL TRANSPORTABILITY GUIDANCE
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RAIL TRANSPORTABILITY GUIDANCE
Blocking and Restraining Item on Railroad Flatcars
With Wooden Floors
1. Bill of Material
Type of Material
Approximate Quantity
Lumber
a.
2- x 4-in.
54 linear ft
2- x 6-in.
18 linear ft
& x 8-in.
15 linear ft
b. Nails
12d
30
20d
72
40d
60
c. Wire
No. 8 gage, black annealed-finish
300 ft (item E)*
300 ft (item F)
d. Wire-Rope
1
/2-in.-dia
100 ft
e. Clamps
1
Wire-rope, /2-in.
j. Thimbles
8**
1
Std, /2-in. open-type
g. Waterproof Paper or Burlap
As required
2. Material Specifications
a. Lumber
Douglas-fir or comparable lumber with straight grain and free from material defects, fed spec
MM-L-751c.
b. Nails
Common or cement-coated, fed spec FF-N-105a
c. Wire
No. 8 gage, black annealed-finish, fed spec QQ-W-461
d. Wire-Rope and Strand
1
/2-in., 6x19, IWRC, improved plow steel, preformed, regular-lay, fed spec RR-W-410a
e. Clamps
Wire-rope, saddled, single grip, steel, MIL-STD 16842
3. Application of Materials
Application
No. of Pieces
Item
A . . . . . . . . . . . . . . Brake wheel clearance. Minimum clearance required is 6 in. above, in back of,
and on both sides of, and 4 in. underneath wheel.
Block (sketch 1, fig 6), 6- x 8- x 24-in. Locate 45" portion of block against front
B
12
and rear of front wheels, in front of inside and outside intermediate wheels,
and in back of inside and outside rear wheels. Nail heel of the block to the
car floor with three 40d nails and toenail that portion of the block under the
tire to the car floor with two 40d nails before items C and D are applied.
Not required if  1/2-in. wire-rope is used for item E.
Not required if No. 8 gage wire is used for item F.
8

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