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Normal Trailer Use
This
PRATT
trailer was designed for operation within legal highway speed limits on reasonable road surfaces
for the type of service it was built to perform in accordance with the following:
1. This trailer was built to carry cargo within the limitations of two weight ratings on the identification plate.
These ratings, GA WR and GVWR, are:
a. The GAWR (gross axle weight rating) is the structural capability of the lowest rated member of the
running gear components: suspension and spring system, hub, wheels, and drums, rims, bearings,
brakes, axles, or tires.
b. The GVWR (gross vehicle weight rating) is the structural capability of the trailer when supported by
the kingpin and axles with the load uniformly distributed throughout the cargo space. Caution!
The maximum load indicated on the identification plate may or may not be a legal load on the
highway you plan to use.
2. This trailer will carry a total payload of the Gross Vehicle Weight Rating (GVWR) less the weight of the
trailer. The load must be uniformly distributed.
3. The cargo should be properly loaded, blocked, and braced to prevent load shifts and to comply with the
following sections of the Department of Transportation Regulations, Subpart 1 - Protection Against Shifting
of Falling Cargo:
• Section 393-100 - General rules for protection against shifting or falling cargo.
• Section 393-102 - Securement systems. To properly secure cargo, it is important that the working load
limits of tie down assemblies be known, as well as the working load limit of the anchor point. See
Table _ for working load limits on trailer anchor points.
• Section 393-104 - Blocking and bracing.
• Section 393-106 - Front-end structure. Your trailer may or may not be equipped with a 'rated'
bulkhead. It is your responsibility to ensure compliance with 393.106.
Beginning March I, 1998 all trailers were required to have anti-lock brake systems on at least one axes per
FMVSS-121 (49CFR 571.121). The type system used on your trailer is described on the Bill-of-Material
accompanying this manual (a "4S-2M" system means there are 4 sensors and 2 modulator valves controlling the
axles), (a "2S-IM" system is 2 sensors and 1 modulator valve). Refer to the manufacturer of the ABS system for
specific information on the various components.
CAUTION!
Operation of the trailer outside the limitations of this manual is against federal law and
PRATT Industries, Inc
,
design criteria. Any operation exceeding the limitations stated will void any responsibility of PRATT
Industries,
Inc
,
for the results.
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