TM 55-2320-260-15-1
ing pattern for an upper piece of laminated
and 7-3 present application of materials for loading
lumber will be adjusted as required so that a
and securing the vehicles on general-purpose flatcars.
nail for that piece will not be driven through,
NOTE
A staggered nailing pattern will be used
onto, or right beside a nail in the lower piece
when lumber or laminated lumber is nailed to
of lumber.
the floor of the railcar. Additionally, the nail-
Table 7-2. Application of Materials for Blocking and Tiedown of Typical M809-Series Truck on
CONUS General-Purpose Flatcars (Figs 7-17-2)
Item
No. Required
Application
--
A
Brake-wheel clearance. Minimum clearance required is 6 in above, in back of, and on both sides of and 4 in
underneath wheel (fig 7-1).
B
12
Chock block (detail 1, item B, fig 7-2), 6- x 8- x 24-in lumber. Locate 45 portion of black against front and
rear of front wheels, in front of inside and outside intermediate wheels, and in back of inside and out-
side rear wheels. Nail heel of block to car floor with three 40d nails, and toenail that portion of block
under tire to car floor with two 40d nails before items C and D are applied.
c
1 ea item D
Suitable material, such as waterproof paper or burlap, Locate bottom portion under item D, the top por-
tion to extend 2 in above item D (detail 2, item C, fig 7-2).
D
Blocks, each to consist of one piece of 2- x 6- x 36-in lumber and three pieces of 2- x 4- x 36-in lumber (detail
6
2, item D, fig 7-2). Nail one edge of 2- x 6- x 36-in piece to bottom 2- x 4- x 36-in piece with five 12d
nails. Then place against tire and nail to car floor through 2- x 4- x 36-in piece with four 20d nails. Nail
other two 2- x 4- x 36-in pieces to one below in same manner.
E
Wire rope, l/2-in, 6x19, IWRC. Each cable will form a complete loop between the tiedown shackle and
4
stake pockets (sketch 1, item E, fig 7-2).
F
Cable clips, l/2-in four each, Place on each cable loop at the overlap area, and space 3-1/2 in apart with a
24
minimum of 6 in from ends of cable. One additional clip shall be placed under each stake pocket and
shackle to secure cable and thimble together (sketch 1, items F and G, fig 7-2).
G
Thimble, open-type, l/2-in Place one at bottom of each stake pocket and shackle (sketch 1, item G. fig 7-2).
8
GENERAL INSTRUCTIONS
1. All handbrakes are to be set with the hand levers wired or blocked, Gearshift levers for automatic or conventional transmissions
must be placed and wire-tied in neutral position.
2. Tires are to be inflated to 10 psi above highway operating pressures.
3. General Rules 4, 5, 9, 10, 14, 15, 19A, and 19B in section I of the Rules Governing the Loading of Commodities on Open-Type
Cars, published by the Association of American Railroads, provide further details. -
Table 7-3. Application of Chain Tiedown for Securing M809-Series Trucks on Flatcars Equipped With Center Tiedown Rails (Fig 7-3)
Item
No. Required
Application
--
A
Brake-wheel clearance, Minimum clearance required is 6 in above, in back of, and on both sides of and 4 in
underneath wheel.
B
4 ea. unit
Chain. l/2-in-dia alloy steel, or proof-tested to minimum of 22,500 lb for vehicles over 16,000 lb to 25,000
lb, inclusive.
Chain. 1/2-in-dia alloy steel, extra strength, proof-tested to minimum of 27,500 lb for vehicles over 25,000
lb to 40,000 lb, inclusive.
GENERAL INSTRUCTIONS
1. Shippers should specify cars equipped with tiedown devices in the quantity shown in Item B when ordering specialized railway
equipment. When carriers furnish cars that do not have built-in chains and tensioning devices, chains and turnbuckles of appropriate
size and strength will be used for securement of vehicles. Load binders are not to be used in lieu of turnbuckles to tension tiedown
chains.
2. Vehicles must face in the same direction and be uniformly spaced along the length of the car to allow sufficient space at each end
of the car and between the vehicles for securement. Apply tiedowns parallel to each other at the same end of the vehicle and from the
vehicle tiedown point to the car tiedown facility. The angle of the tiedown must be as close to 450 as possible. When length of vehi-
cles loaded on a 75-ft car precludes facing all vehicles in the same direction, one vehicle may be reversed to insure application of tie-
down at a floor angle of 45.
3. Handbrakes must be set.
4. Gearshift levers on vehicles equipped with automatic or standard transmissions must have the gear shift lever wire-tied in neu-
tral position.
5. Open hooks must be secured with wire over the opening to prevent hook from becoming disengaged from chain link to which hook
is secured.
6. Turnbuckles used to tighten chains must be wired or locked to prevent them from turning during transit unless the turnbuckles
are equipped with self-locking devices,
7. When vehicles are shipped in a loaded configuration, the gross weight of the vehicle and cargo combined must be determined in
order to assure that the proper size and/or number of tiedowns are used to secure the vehicles to the railcar. The "approximate
7-5
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