The Dynamic Duo: Trucks and Trailers

Trucks and trailers provide important logistical support to any construction project.

Article December 28, 2000
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Without trucks and trailers
nothing on the job site would get done. For without them there
would be no way to transport the building material or the
machinery and equipment used to construct a road or a bridge.
Together the tag team of a truck and a trailer provide crucial
support to the project. The team's joint efforts haul the
material, whether it be concrete, asphalt, dirt or gravel, and
bring in the equipment, whether it be as small as a skid-steer
or as large as a paver. Working together the truck and the
trailer is the backbone of the logistical effort to complete a
construction project. The following is a brief look at some
trucks and trailers available today.



The new Cat D350E articulated truck has replaced the D350D
model. The new model is powered by a direct injection,
turbocharged and after-cooled Caterpillar 3406 diesel engine,
rated at 340 hp at 2,000 rpm. It is a six-cylinder, four-stroke
engine with a 30% torque rise. The truck features an
electronically controlled Caterpillar planetary autoshift
transmission. The electronic programmable transmission control
monitors engine rpm electronically and executes shifts at
factory-present points.

The design of the new model also has
taken into account driver comfort. The cab includes an
electronic monitoring system, tilt steering wheel, and an air
suspension seat. The seat's cushioned side-bolsters limit
side-to-side movements in rough terrain and on slopes. It offers
seven-position for and aft adjustment, three position lower back
support, three levels of suspension dampening, operator weight
support adjustment and three-position seat cushion tilt.


Their product line includes the FLD 112SD and
the FLD 120SD conventional dump trucks. Both models are set-back
front axle, dual-drive trucks, that do not include the dump
bodies. The 120SD features a 120-in. BBC aluminum, non-sleeper
cab with a heavy-duty cab kit. This model is powered by a
Caterpillar 3406C, 425-hp at 1,900-rpm engine with an engine
break. It has a 1,500 watt/115 volt block heater. The engine is
cooled by a 1,203-sq-in. cross-flow radiator with draincock.
It's transmission is a Fuller RTLO-14618A 18-speed with
frame-mounted transmission cooler and rear support leaf spring.
The clutch is a Rockwell Hi-capacity 15.5-in. dampened ceramic

The 112SD has a 112-in. BBC aluminum, non-sleeper
cab. This truck's power is supplied by a Cummins M11-310E,
310-hp at 2,000 rpm engine with a Jacobs compression brake.


The company offers a full line of trucks suited for
dump, mixer or long haul applications. The W900S has a rear axle
rating of 58,000 lb, a front axle rating of 20,000 lb with
3-leaf taper springs and a wheel cut of 37.5 deg. Engine options
include either Caterpillar or Cummins and is designed vocational
truck applications.

The T800 can be set up as a quad axle
dump truck, a tri-axle dump truck, a semi end-dump truck, a 6x6
mixer, a set back front axle mixer or a sliding mixer system
tractor. Beside transporting material this model can also be
used in a lowboy set up to haul machinery. The short hood model
has a GVWR of 78,000 lb while the standard model has a GVWR of
92,000 lb.


The company offers a number of model
series for use in the construction market. The RB Series for
instance can be used in dumper or mixer applications. Its
axle-back design shortens the wheelbase and decreases its
turning radius, aiding its use on tight construction sites. For
larger tasks, where space is not an issue, Mack offers the RD
Series. Design to handle engines with up to 500 hp, it can be
used as a dumper or mixer.

Another series design to
accommodate powerful engines such as the Mack 500-hp E9 V-8
diesel engine, is the CL Series. This truck comes in a full
range of configurations for both highway and on/off-highway

The company also is offering a new engine, the
E-Tech. It is available in three families and 10 power ratings,
from 275 to 460 BHP. With it's improved throttle response it is
20% to 30% quicker than the current E7.

Mitsubishi Fuso

Their latest truck is the FG, a 4-wheel drive, medium-duty
cabover truck, with a GVWR of 12,000 lb. It is powered by a
Mitsubishi 4D34-2AT3A, 4-stroke, water-cooled direct injection,
turbocharged, intercooled diesel engine. Maximum output is 135
hp/3,000 rpm with a maximum torque of 253 lb ft/1,800 rpm.

Mitsubishi Fuso also offers its FK/FM models, which cover
Classes 6 through 7, with GVWRs ranging from the 23,000 lb of
the FK Class 6 to the 32,900 lb of the FM-SR/FM-SP Class 7. The
FM models can be used in a number of vocational body
configurations, and offer wheel bases from 181.9 in. to 230.3

Moxy Trucks

Moxy Trucks of America has announced the
introduction of the improved 30-ton MT30 XT six-wheel drive,
articulated dump truck. Areas of improvement include the
water-cooled, direct injected Scania DSC9 engine, with a power
rating of 262 hp at 2,200 rpm; and the ZF transmission, now with
EST 25 auto shift control and three reverse gears. The front
chassis and cab has been improved with a mirror bracket arm
reinforcement, non-reflective glass on cab instrumentation, and
the drive line, brake, and wheels.

If more load capacity is
needed, the company also offers the 40-ton MT40 six-wheel drive
articulated dump truck. Powered by a Scania DS 14 water-cooled,
direct-injected diesel engine with turbocharger, it has a power
rating of 419 hp at 2,100 rpm. The transmission is a ZF type 6WG
65 electronically-controlled automatic, with integral torque
converter and automatic lock-up in all gears. The body is
constructed throughout with Hardox 400 hardened steel plates in
the floor, front and sides.

Navistar International

joint venture between Navistar and TIC United Corp.--a
Texas-based truck manufacturer--has resulted in SST Truck Co.
This is where Paystar trucks and tractors are being
manufactured, such as the 5000 Series, designed for on- and off-
highway severe service operations, including snow plows, tow
trucks, dump trucks, cement mixers and coal trucks.

also has made an addition to its 9000 Series by introducing the
9100 conventional tractor. This truck comes with a variety of
engine choices, including Cummins, Caterpillar and Detroit
Diesel engines, that range in size from 11 to 14 liters and
offer up to 435 hp. These engine selections are complemented by
a range of Rockwell, Dana and Eaton drive train components.
Other options include options for either 80- or 100-gal fuel
tanks, choices of either non-polished or body color aluminum
front bumper, daytime running lights and halogen headlights and
a galvanized steel grille with integrated bug screen painted the
body's color.


The flagship of the Peterbilt
Motors Co. fleet is the Model 379, which can fulfill many
construction applications. The 379 comes with a wide range of
engines providing up to 550 hp. Another model useful in
construction is the Model 378, designed with a gently sloping
hood, for enhanced visibility and improved jobsite

The company's Model 357, which can be used
in a dump or mixer configuration comes with many options, such
as aluminum or steel fuel tanks, set-forward or set back front
axles, front tow eye with A-brace and 4x2, 4x4, 6x4 or 6x6
configurations. Other construction truck models include the 320,
a low-cab forward design, which aides in negotiating crowded
construction sites and rough terrain, and the 385, which comes
with lightweight options to increase payload.


Formerly known as Volvo GM Heavy Truck Corp., the company
recently changed its name to Volvo Trucks North America Inc. as
a result of Volvo's increased investment in the U.S.-based truck
manufacturer. The company's Xpeditor series of low-cabover
trucks is designed with innovations aimed at the vocational
market, such as a mixer or highway line painter. It is available
in either right- or left-hand-drive models with GVWRs of 43,000
lb or 60,000 lb.

Just recently Volvo's Autocar nameplate
celebrated its 100th anniversary. This truck has heavy-haul
applications as well as vocational applications. Models can be
ordered with a choice of engines from four manufacturers--Volvo,
Cummins, Caterpillar or Detroit Diesel--which offers power up to
550 hp. Autocars also offer up to 70,000-lb capacity tandem
drive axles.


Landoll Corp.

Among the many
models offered by Landoll are a triple axle 50- and 40-ton
gooseneck and a tandem axle 35 ton gooseneck. All come with the
company's easy hooker system designed with a fail safe hook-up
indicator, which can be viewed from the drivers seat, thus
adding in loading and unloading equipment.

The company also
offers dump trailers with capacities from 15 cu yd to 21 cu yd.

Etnyre Trailer Co.

Etnyre just announced the release of
a new 35-ton Blackhawk series lowbed trailer that weighs in at
12,500 lb. It is equipped with a non-ground bearing gooseneck
with over 32 in. of vertical travel. Standard features include
an adjustable fifth wheel height, adjustable road clearances and
adjustable deck heights. The standard width is 8 ft 6 in. and
the standard deck length is 22 ft. Optional deck lengths of 21
ft and 23 ft also are available.

Additional features include
apitong flooring, swinging and removable outriggers, Hutch
multi-leaf spring suspension and an optional Ridewell air ride.

The company's ramp trailers are now available with either
electric or air brakes and feature a deck height of 31.25 in.

Red River Manufacturing

The company offers
bottom dump and live bottom trailers that range in body capacity
from 20 cu yd to 40 cu yd. Design payload ranges from 24 tons to
50 tons. The largest of the line, the 8-axle LB838 features
60-deg sloped walls and a chain assembly, live bottom floor. A
continuous belt of heat- and oil-resistant two-ply rubber moves
the load to the rear for discharge. Three of the eight axles are
liftable--two in the front and one in the rear. Standard
features also include two-speed landing gear.


Redi-Haul's tag-a-long Pintle hitch trailers
feature a continuous one piece main frame, one piece front
bulkhead, low deck height, I-beam bed crossmembers, sealed
modular wiring system with sealed shock mounted lights, spring
assist ramps, adjustable height hitch and bolted oak decks.
Capacities range from 10,000 lb to 50,000 lb. The company's
latest model is the FSL1828BE-102, with a capacity of 14,000 lb
and a deck length of 21 ft and a width of 81 in.


Rogers new Ultima Series trailers feature a sleek
design that reduces overall weight, allowing for a greater
payload. The capacity of the series ranges from 35- to 60-tons
and features the company's patented Croucher body styling.
Standard is an oak deck with optional removable side brackets to
widen it by two feet. A 30 deg riser permits easy loading onto
the rear frame. The series also is available in specialized (XL)
models, which provide a wider selection of payload capacities,
deck styles and sizes, goosenecks, axle and rear frame

Trail-eze Trailers

The company offers a
line of tilt, ramp and gooseneck trailers. The tilt bed trailers
range in payload capacities from 18,000 to 30,000 lb. Overall
length is 29 ft 8 in. and the tilt bed length is 24 ft. Their
50-ton, detachable gooseneck trailer is 48 ft 6 in. to 50 ft
long with a load deck length of 22 ft. Unloaded deck height is
26 in. with 10 in. of ground clearance.

Trail-eze offers a
lite ramp trailer with a capacity of 20,000 lb as well as
hydraulic ramp trailers ranging in capacity from 18,000 lb to
40,000 lb. The company also offers a sliding axle trailer with a
capacity of 40,000 lb and an overall length of 36 ft.

King Industries

Trail King's 13-axle, self-steering
detachable gooseneck trailer, the TK160 MDG, has a load capacity
of 80 tons, and the ability to turn sharp corners. The after
most three axles on the dolly pivot off the kingpin to increase
the turning ratio.

Deck extensions are available to adjust
the deck to a variety of lengths. When extensions are added, the
self-steering mechanism on the dolly can be adjusted. The dolly
has five adjustable positions to increase the steering ratio.
The dolly can also be used for hauling self-supporting loads.

The company also offers a 25-ton hydraulic roll back
trailers, the TK50RB with a payload capacity of 25 tons at 65
mph, with a 7 deg load angle. When loaded the 30 ft long 102 in.
wide deck rests 36 ft off the ground.

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