TM-55-2320-279-14
M977 SERIES, 8x8 HEAVY EXPANDED MOBILITY TACTICAL TRUCKS (HEMTT)
TRANSPORTABILITY GUIDANCE
TM-55-2320-279-14 - Page 24 of 46
TM 55-2320-279-14
CHAPTER 5
HIGHWAY TRANSPORTABILITY GUIDANCE
Section II. GENERAL
5-1. Scope
CAUTION
This chapter provides highway transportability
Trucks must not exceed 3 mph during
guidance for movement of the HEMTTs. It covers
loading or unloading operations.
technical and physicial characteristics of HEMTTs,
as well as safety considerations. It also prescribes
5-3. General
the materials and guidance required to prepare,
Although overwidth permits are required in most
load, tie down, and unload the HEMTTs.
areas, the HEMTTs can be transported under
5-2. Safety
their own power for highway movement in conti-
In addition to the safety precautions contained in
nental United States (CONUS) and overseas areas.
The vehicles may also be transported by semi-
chapter 3, movement is subject to all safety laws,
trailers.
rules, and regulations applicable to commercial
carriers. Overseas movements are governed by the-
ater regulations.
Section Il.
SELF-PROPELLED MOVEMENT
5-4. US Highways
The length, height, weight, and axle loads of the
HEMTTs are within the legal limits of the inter-
state highways and those major highways desig-
nated by the Federal Highway Administration
(FHWA) for vehicles 102 inches (2.59 m) wide.
However, the width of the HEMTTs exceeds the
width limitation of 96 inches (2.44 m) on all high-
ways not designated for vehicles 102 inches (2.59
m) wide by the FHWA and will require permits for
movement (AR 55–162). With assigned payloads,
the trucks will encounter many restrictions for
gross vehicle weight and tandem axle loads. How-
ever, most restrictions can be resolved by permits.
Where maximum permit limits are exceeded, certi-
fication as "essential to the national defense" may
be required.
5-5. European Highways
Movement restrictions of the HEMTTs (without
payloads) will be minimal except for width. How-
ever, with assigned payloads, the trucks will en-
counter numerous restrictions throughout Europe
and will require special permits and selective rout-
ing. The International Road Federation (IRF),
Geneva, Switzerland, publishes maximum legal di-
mensions and weights for highway vehicles in for-
eign countries. Since the HEMTTs do not match
vehicle configurations established by the IRE, as-
sistance for intheater or incountry clearance for
dimensions and vehicle weights can be obtained
from the 4th Transportation Command, Oberursel,
Germany.
5-6. Other Countries
The HEMTTs (without payloads) may encounter
width restrictions in certain countries, but world-
wide restrictions are minimal. With assigned pay-
loads, the trucks will encounter numerous restric-
tions and require permits and selective routing.
Section Ill. TRANSPORT BY SEMITRAILER
5-7. General
will be required because size and weight limita-
The HEMTTs can be transported over highways by
tions will be exceeded. One army semitrailer that
military or commercial semitrailers of adequate
can transport the HEMTTs is the M872 towed by
size and capacity. This section provides for the
the M915 truck-tractor. However, movement of the
movement of a disabled vehicle or the movement
HEMTT load by semitrailer will be restricted be-
of the HEMTT for administrative or logistical pur-
cause of the width, gross vehicle weight, and
poses. In CONUS and in overseas areas, permits
tandem axle weights.
5-1
Back to Top
