Table 71. Bill of Materials for Blocking and Tiedown of Dispenser on General-Purpose
Flatcar (Figs 71 and 72)
Douglas-fir, or comparable, straight-grain, free
from material defects; Fed Spec MM-L-751 H:
8 linear ft
6- x 8-in.
12 linear ft
2- x 6-in.
36 linear ft
2- x 4-in.
Common, steel; flathead, bright or cement-coated;
Fed Spec FF-N-105B:
Standard, open-type: 5/8-in.
Wire rope, U-bolt clips, saddled, single-grip, steel,
Crosby heavy-duty, or equal: Fed Spec
6 x 19, IWRC; improved plow steel; preformed, reg-
ular-lay; table X, Fed Spec RRW-410C: 5/8-in.
Waterproof paper, burlap, or other suitable mate-
Application of Material for blocking and Tiedown of Dispenser on General-Flatcar(Figs 7-1 and 7-2)
ten 20d nails. Nail two upper 2- x 4- x
Brake wheel clearance. Minimum clear-
72-in. pieces to lower piece with ten 30d
ance required is 6 in. above, in back of,
and on both sides of, and 4 in. under-
Tiedowns (detail 3, fig 72). Each to con-
neath wheel, 12-in. minimum clear-
sist of one piece 5/8-in. 6 x 19, IWRC wire
ance from end of car to load extending
rope, length as required (approxi-
from center of brake wheel to side of
mately 15 ft). Form a complete loop
car, and 6 ft above car floor (fig 71 ).
between tiedown shackle and appro-
Chock block (detail 1, fig 7-2). Place 45°
priate stake pocket at a maximum an-
end against each wheel as shown in
figure 7-1. Toenail heel of block (33°
gle of 45 degrees. Wire rope ends should
overlap approximately 25 in.
end near bottom edge) to car floor with
Thimbles. Place one under wire rope at
one 20d nail in each block. Drive two
each place where rope passes over bot-
40d nails through heel of each block,
tom edge of stake pocket and tiedown
perpendicular to car floor. Toenail each
shackle. Secure each thimble to wire
side of each block to floor with two 30d
rope with one 5/8-in. clip (detail 3, fig
Cushioning material (detail 2, fig 7-2).
Clips. Place six on each item E at overlap
Locate so that material is under item
D and extends 2 in. above item D be-
area. Space clips 3¾-in. apart a mini-
mum of 6 in. from ends of wire rope
tween tires and item L).
Side blocking (detail 2, fig 7-2). Each to
(detail 3, fig 72). Place one on each
item F as indicated above.
consist of one piece of 2- x 6- x 72-in.
Brace. Consists of one piece of 6- x 8-in.
lumber and three pieces of 2- x 4- x 72-
lumber by length-to-suit (approxi-
in. lumber. Nail 2- x 4- x 72-in. piece to
mately 24 in.). Force fit between rail
edge of lower 2- x 4- x 72-in. piece with
car floor and bottom of reach tube aft
ten 20d nails. Place 2- x 6- x 72-in. piece
of lunette. Toenail to car floor with one
against cushioning material and tire
40d nail through each side.
and nail to car floor through 2- x 4- x
72-in. piece in a staggered pattern with
Commodities on Open-Top Cars and Trailers, pub-
lished by the Association of American Railroads,
1. Set handbrake and block and wire lever in
3. Tension wire rope with an applicable sized
2. General Rules, 1,2,3,4,5, 14, 15, 19A, and 19B,
come-along mechanical hoist or equal tensioning
Section I of the Rule Governing the Loading of