Types of Aerial Lift Platforms
Although there are others (vertical mast/personnel lifts, and push-arounds, to
name but two) there are three principal types of
aerial
lifts:
1. Telescopic boom aerial lift--sits on a swivel base, can be raised to any
angle, and then extended straight out like a telescope. The clue is in the
name.
2. Articulated boom aerial lift--like its telescopic brother, this also sits
on a swivel base, and can be raised to different angles. However, it is articulated,
which means that it has a joint that performs the same function as an elbow
in a human arm.
3. Scissor aerial lift--its base does not swivel, and is generally the same
size as the aerial lift platform that sits upon it. Again, the name describes
the mechanism. As the platform rises, and falls, the supporting structure resembles
multiple pairs of scissors opening, and closing.
Buying Criteria for Aerial Lifts
When buying (as opposed to renting) an aerial
lift, it is important to think
creatively about the situations in which it may be used. Perhaps it is going
to be mainly deployed for cable work, or painting and decorating, or steel
frame erection. But might it have other applications? And how embarrassing
and costly will it be if it becomes necessary to rent another aerial lift
because the one purchased cannot fulfill an unanticipated role? There is,
as always,
a trade-off between cost, and flexibility.
Having identified the tasks that a new aerial
lift platform might have to
undertake, there are five key questions--besides the obvious issues of price,
and delivery--that must be asked when making a purchasing decision:
How high?
How accessible?
How heavy?
How rugged?
How plug-inable?
How high must the aerial lift reach?
There arent any hard, and fast rules about how high different sorts of platforms
will reach, and aerial lift manufacturers are constantly innovating, and breaking
previous limits. However, telescopic boom lifts tend to have by far the longest
reach, and the tallest rise to 120 feet. Articulated boom lifts tend to operate
in the 30 to 60 feet range--sometimes a little more, while scissor lifts are
usually used at considerably lower heights: around 20-40 feet.
Note that it is normal for all measurements to run from the ground to the
aerial platforms base. Add six feet for the actual working height.
How accessible is the location that the aerial
lift must reach?
There are two parts to this question.
First, what obstacles might prevent the whole lift base, and aerial platform
from maneuvering into position on the ground? Where a lift has a boom, that
boom will be much longer than the base, and the unit will be unable to turn
tight corners. A scissor lift is usually the same size from the ground up.
Measure aisles, doorways, and tight spaces where maneuvering might be tricky.
Second, how accessible is the at-height location where workers will actually
be operating? An aerial platform on the end of an articulated boom is most
flexible because it can be lifted above ridges, and stacks, and into tight
corners.
How heavy a load must the aerial lift be able to carry?
A lifts operating capacity is critically important. A 300 pound lift will
carry only one person and some light equipment, which may well be insufficient
for many types of jobs. It is also possible to find models with lifting capacities
of 2,000 pounds or more.
How rugged is the terrain on which the aerial lift must work?
Some aerial lifts are designed to operate safely only on slabs, such as might
be found in a warehouse. These cannot be used in exterior or rugged terrain
situations, where it is vital to use equipment that is intended for such
environments.
How plug-inable is the aerial lifts working environment?
Most aerial lifts require a power source. Those used exclusively in interior
locations usually run on electricity. Those used exclusively outside normally
have diesel or gas engines. Aerial lifts that have to operate in both environments
often have two engines: a gas or diesel one for exterior use, and a propane
one for inside.
Sources
Upright.com
Articles.directorym.co.uk
Buyerzone
Goldcoasthilift.com