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Loading Procedures |
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 TM
55-2350-252-14
**CAUTION**
of railcar, materials available, and the weight of
Use railcar and ground guides when load-
the vehicle. The M2/M3 and M2Al/M3Al require
ing or unloading the BFVS.
four less wire rope or chain tiedowns than the
other BFVS. Figures 31 and 32 show the tie-
**CAUTION**
down patterns. Tables 3-2 and 3-3 determine the
Do not allow the BFVS to exceed 3 miles
type of materials needed for tying down the BFVS.
per hour (walking speed) during loading
or unloading operations.
materials and application of wire rope tiedowns
3-4. Loading Procedures
(options 1 through 3). Table 3-6 provides a list of
materials and application of chain tiedowns (op-
Place the BFVS onto the railcar with a crane of
tions 4 through 11). Figure 34 provides construc-
adequate capacity, or drive it onto the railcar if a
tion and application instructions for chock blocks.
suitable ramp or bridge is available. (See para 4.4
for lifting procedures.) Once the vehicle is in
instructions for wheel blocks. If the railcar is not
position, set the parking brake, and put the trans-
chain-equipped, the shipping unit is responsible for
mission in neutral.
providing blocking materials and chains or wire
3-5. Tiedown Procedures
rope for tiedown.
Rail tiedown of the BFVS is dependent on the type
Table 32. Tiedown Material Options for Railcar Types
Options
Type of Railcar
Cushioned Wood Deck
all 111
1, 3, 6, 7, 10, 11
Cushioned Steel Deck
Standard Wood Deck
1, 4, 8
Table 33. Tiedown Option Descriptions
Option
Materials
1
16 wire rope tiedowns, 4 chock blocks, and 6 wheel blocks
2
16 wire rope tiedowns, and 4 chock blocks
3
16 wire rope tiedowns, and 6 wheel blocks
4
12 1/2-inch, 13,750-pound WLL chains, 4 chock blocks, and 6 wheel blocks
5
12 1/2-inch, 13,750-pound WLL chains, and 4 chock blocks
6
12 1/2-inch, 13,750-pound WLL chains, and 6 wheel blocks
7
16 1/2-inch, 13,750-pound WLL chains
8
20 3/8-inch, 9,000-pound WLL chains, 4 chock blocks, and 6 wheel blocks
9
20 3/8-inch, 9,000-pound WLL chains, and 4 chock blocks
10
20 3/8-inch, 9,000-pound WLL chains, and 6 wheel blocks
11
24 3/8-inch, 9,000-pound WLL chains
NOTE
The shipping unit is responsible for providing blocking materials.
Table 3-4. Bill of Materials for Wire Rope
Item
Description
Wire Rope
5/8-inch diameter, 6 x 19, IWRC, preformed, regular lay, Fed Spec RR-W-410D.
320 feet
Cable Clamps
5/8-inch, Type I, single-saddled, steel, Fed Spec FF-C-45.
64
Cable Clamps
3/4-inch, Type I, single-saddled, steel, Fed Spec FF-C-45,
32
Thimbles
5/8-inch, Type HI, split oval construction (heavy open pattern), Fed Spec FF-T-276.
32
3-2
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