Figure 2-5. Tiedown of a carrier on the M172A1 semitrailer. (Table 2-3, option 1b)

Figure 2-4. Two carriers secured to the M1000 semitrailer

CHAPTER 3 RAIL TRANSPORT GUIDANCE

TM-55-2350-224-14 Locomotive Diesel-Electric Manual
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TM 55-2350-224-14 Position carrier with the tracks the semitrailer wheel wells. clearing Two chains on each rear tiedown Figure 2-5. Tiedown of a carrier on the M172A1 semitrailer. (Table 2-3, option 1b) Table 2-4. Tiedown Procedures for Securing a Typical Carrier on a Semitrailer Item Procedure Chains/Load Binders Properly rated chains and load binders are preferred for tiedown. Install at indicated locations, as (4 to 8 required) shown in figures 2–1, 2–3, 2-4, and 2-5. Use the Following Procedure When Chains Are Not Available Wire Rope Loops Each tiedown is made from one piece of l/2-in. wire rope. Cut length as required. (Need a maxi- (4 or 6 required) mum of 20 ft per tiedown.) For a complete loop between carrier tiedown provision and appropriate trailer stake pocket. The angle between the cables and trailer deck (as viewed from the side) should be as close to 450 as possible. The wire rope ends must overlap at least 24 in. Tension the wire rope by using two cable grippers and a 3-ton chain hoist or come-along. Cable Clamps Space clamps 3 in. apart. Use 1/2-in. cable clamps, and torque nuts alternately to a minimum of 65 R-1b. Thimbles Use thimbles to protect cable at sharp bends. Attach to cable with 5/8-in. cable clamp. cable loop breaking strength of 36,800 One-half-inch cable clamp nuts must be pounds. To get the correct torque, apply torqued to at least 65 ft-lb, to develop full torque alternately to both nuts. 2-9

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