HIGH DENSITY
CHASSIS PARKING
DEFINITION
OF VERTICAL CHASSIS PARKING
"High density chassis parking" is
a system using
a lifting device and a
supporting structure to
temporarily store empty
container chassis in an
upright or vertical position. Using the
system, nine chassis
are vertically stored in
an area normally
occupied by one
parked chassis. The
system benefits marine
container terminals, Intermodal
railroad yards, and other
container chassis operations areas experiencing land
shortage or high
land cost.
The Chassis Systems,
Inc. patented high
density parking system
is presently in use
in Japan, Singapore
and throughout the
United States.
HOW
THE SYSTEM WORKS:
The are two elements
to the system. The element
that raises the
chassis to the vertical position
is the Chassis
Stacker. The supporting structure that retains the chassis in high
density parking is the 'rack'.
The Chassis “Stacker™” is attached to a fork lift
truck and is
operated in conjunction with the
truck. The non-moving carriage
of the “Stacker™” is attached to the side shift of
the lift truck. The moving portion of the Chassis
“Stacker™” pivots at the base of
the carriage assembly
and is known
as the boom.
To lift and park an empty chassis, the
boom is lowered
to horizontal and the
chassis is approached
from the rear.
Contact is made
between the “Stacker™”
support legs and
the rear of
the chassis. A clamping assembly closes on the sides of the chassis
ahead of
the front axle.
After clamping the chassis
frame from the
side, the Chassis
“Stacker™” then grips the chassis frame from both the top
and the bottom.
Finally, the chassis
is hydraulically rotated to the vertical position and
safely held on
the top, bottom and
side by the
clamps and supporting
legs. Once vertical, the chassis is transported to the parking
rack area by the lift truck.
The parking "rack" consists of a horizontal support arm assembly, approximately 45 feet long, mounted
on top
of two vertical
steel columns. The columns are bolted
to below ground
concrete footings. Each
assembly occupies two parking
spaces and will
vertically accommodate 18
chassis; nine per side of the center columns. With additional space
savings in yard layout, the actual ratio of space saving
can approach 10:1.
To place the chassis in vertical parking, the Chassis “Stacker™” lift truck
with the chassis in the vertical
position is driven into the parking "rack" area. The operator stops the
truck on a
position marker designating
each parking space. At this
position, the chassis
makes contact with
the overhead supporting
arm. The chassis is lowered vertically
to the ground
and comes to rest on the dock
bumpers or the ICC bumper, held
at a 75
degree angle by the support
arm. The weight of the chassis on the
support arm pulls the next support arm into position for receiving the next
chassis. As a chassis is removed, it swings the support arm
of the previous chassis out
of the way. The rack operation is completely
automatic.
Normal cycle time for parking or removal is less than
two minutes.
Users report no damage to chassis, bumpers, flaps or lights.
Only one man is required for the operation.
BENEFITS
OF VERTICAL PARKING
1. LAND AREA SAVINGS
The basic purpose of high density chassis
parking is to free
areas currently used to
store chassis for more productive use.
The effective
ratio of space saving approaches 10:1. "Finding" new land area in an existing terminal
can be of tremendous value.
As the need
for container throughput
increases, older, land locked terminals can
have their useful
life extended. The difficulty and expense of finding
additional land for chassis parking can
be avoided. The excessive cost of
outside parking of empty
chassis, including drayage and
gate fees, can be eliminated.
Stacking nine chassis in the area of one
parking space is
equivalent to stacking containers
nine high. This efficient land
utilization is the reason why this system has been included in
the most
state of the
art terminals being designed
and opened today.
It is also
a faster solution
than acquisition or creation of parking facilities.
Stacking chassis in tight terminals can
provide enough room for "wheeled" operation to continue, instead of
"grounding" loads.
2. REDUCED TRACTOR OPERATIONS
Since the land area needed for chassis
parking is reduced, and
the parking system can operate
at speeds compatible
with container loading
speeds, the parking area can be nearer to or adjacent the
container operations area.
This can result in substantial reduction of
tractor operation time through:
·
Shorter
travel distance
from work area
to parking area. High
density chassis parking
is the most
efficient use of
space available. The reduction in
space is so great that
chassis can be
stored where optimum terminal functional layout dictates, on
land once considered too valuable for chassis.
·
As
an example: hostling runs associated with
chassis are typically
done by terminal employees, as compared
to parking loads
which may be
done by outside drivers. Therefore, high cost chassis hostling runs
should be kept to a minimum.
·
Reduced search
time due to
parking segregation by owner
and size. Compare hostlers roaming
10 or more
acres looking for chassis or
looking for spots to park chassis, with
high density parking where hostlers simply go to parking
racks near the operating area.
Reduced tractor operations means
less terminal traffic and
congestion, which contributes
to overall safety
and efficiency.
3. IMPROVED INVENTORY CONTROL
A glance at the enclosed photos
demonstrates how simple
it is to
take a "yard
check". Chassis inventory can be
done in one location,
and chassis in high
density parking stand
out whether they
are 20's, 40's
45's etc. Utilization of the system by using specific racks
for customer and
chassis size makes inventory
controls even more
accurate and less
time consuming. Using the analogy
of a desktop
crowded with papers,
this system is a vertical file drawer.
Organization is the key.
4. REDUCED CHASSIS DAMAGE
Chassis damage
is reduced due
to decreased handling.
Most chassis damage is done
while the chassis is
empty, parked improperly
or hit while parking another chassis. Horizontal
stacking results in
damage to landing gear and brake actuators
and unsafe conditions.
In high density
parking, each chassis is independently supported in
the parking rack
and is stored compactly and safely. No damage
can occur while
the chassis are
in the rack.
5.
IMPROVED SECURITY, REDUCED RISK
Outside drivers have access only to chassis that have
been "grounded" by a
terminal employee. "Bad order"
chassis will not be available
until released. Chassis operations are restricted to a defined
area of a
terminal. Unsafe and unstable horizontal
stacks of chassis
are eliminated. Computerizedcontrol
is possible.
6. CUSTOMER RELATIONS IMPROVED
A factor in contract negotiations is the
number of chassis that a terminal will store and the associated
fees and
costs of storage.
The capacity increase and cost reductions associated with
high density parking can provide competitive advantage to the terminal.
Improved inventory control, reduced
damage, and faster turn around time reduces customer
costs and improves relations with drivers as well as reducing terminal
congestion.
7. POSITIVE
WORKER ACCEPTANCE
Terminal workers accept
and work with the system to keep chassis parking operations within the confines
of the terminal instead of outside parking.
SUMMARY OF ECONOMIC BENEFIT
1.
LESS LAND NEEDED FOR CHASSIS PARKING.
2.
REDUCED TRACTOR OPERATIONS. REDUCED TERMINAL CONGESTION.
3.
IMPROVED INVENTORY CONTROL.
4.
REDUCED CHASSIS DAMAGE.
5.
IMPROVED SECURITY, REDUCED RISK.
6.
CUSTOMER RELATIONS IMPROVED.
7.
POSITIVE WORKER ACCEPTANCE.