Chapter 7. RAIL TRANSPORTABILITY GUIDANCE

TM 55-2320-258-14

CHAPTER 7

RAIL TRANSPORTABILITY GUIDANCE

Section I. GENERAL

7-2. Maximum Use of Railcar Capacity

7-1. Scope

Additional cargo, as approved by the activity offering

This chapter provides transportability guidance for

the HET and C-HET systems for transport, may be

rail movement of the HET and C-HET systems. It

transported on a railcar with the system, provided the

covers significant technical and physical characteristics

railcar weight and dimensional limitations are not

and safety considerations and also prescribes the

exceeded. Do not load additional cargo on the M747

materials and guidance required to prepare, load, and

trailer bed.

tie down the system on open top flatcars.

Section Il. TRANSPORT ON CONUS RAILWAYS

the tiedown position on a railcar by a crane of

7-3. General

adequate capacity (23-ton minimum), or they may be

The transportability guidance contained in this section

driven or towed onto the railcar, provided a suitable

is applicable when the HET and CHET systems are

ramp or bridge is available.

transported on CONUS railways. Consideration is

b. The loads illustrated in figures 7-1, 7-2, and 7-4

given to movements on railcars normally used for this

are based on a flatcar width of 10 feet 6 inches.

type of equipment. Both systems can be transported

Figure 7-3 provides detailed instructions for blocking

without restrictions only at reducible height. Sectiona-

and tiedown. Tables 7-1 through 7-5 provide bills of

lization or major disassembly is not required. Remove

materials and instructions for their application to

warning beacon light from the M746 and the exhaust

secure the system on general-purpose flatcars.

c. Although the truck-tractor and semitrailer are

stack from the M911 to meet height requirement.

illustrated as separate loads, they can be transported

Stow items in the cab.

by rail when connected as a unit on a railcar at least

7-4. Preparation

65 feet long with a minimum load capacity of 39 tons.

NOTE

a minimum, the following preparations should be

A staggered nailing pattern should be used when lumber or

accomplished:

laminated lumber is nailed to the floor of a railcar. The

a. Secure all basic-issue items against pilferage and

nailing pattern for an upper piece of lumber should be

damage. Place them in stowage compartments or a

adjusted as required so that a nail for that piece will not

wooden crate of suitable size and capacity. If crated,

be driven into or against a nail in the lower piece of

lumber.

secure crate to parent vehicle.

d. The tiedown shown for the semitrailer ramps (fig

b. Remove rearview mirrors from the truck-tractor

7-2) is a suggested method and detailed instructions

and stow them in the cab.

are not provided. One alternative method would be to

"Paragraph c deleted"

restrain the ramp in the upright position as shown in

7-5. Loading on General-Purpose Flatcars

figure 7-3.1. This would negate removing the ramp

and securing it on the semitrailer bed.

a. The HET and C-HET systems can be placed in

7-1

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