ONLINE self-study. Boomlift Non-Practical. Type: Scissor/Vertical.
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A scissor/vertical lift has a platform that CANNOT be positioned completely beyond the base and is used to position personnel, necessary tools, and materials at elevated work locations. Scissor/vertical aerial work platforms are power operated (motorized) with primary functions controlled from the platform.
A boom supported aerial work platform has a platform that can be positioned completely beyond the base and is used to position personnel, necessary tools and materials at elevated work locations. Boom supported aerial work platforms are power operated (motorized) with primary functions controlled from the platform. Examples: Boomlifts, Aerial lift, Man-lifts, Aerial Platforms, Articulated Booms, and Cherry Picker.
Articulated boomliftsprovide the ease to get "up and over" obstacles so as to place personnel and their tools at specific work locations. The load capacities range from 300 lbs to 1000 lbs (UNC's articulated boomlift ranges from 500 lbs to 1000 lbs). Standard platform widths range from 4', 5', or 6' (University's is 8'). It can be powered by gas, gas/propane, diesel, or electric DC motors. Primary use involves industrial equipment maintenance, construction applications, warehousing and inventory storage, cleaning, etc.
The employer is required to:
The boomlift operator is:
Each Boomlift is required to have the following features:
It is imperative to know the correct parts of a boomlift. This is very crucial when reporting problems.
The steering control for the boomlift is located at the upper controls. Always make certain you re-orient your platform position relative to the base. This means the steer and drive functions will operate in reverse when the unit's platform is not extended over the drive wheels.
There are three possible types of tires for the boomlift.
If the tires have to be replaced, it must match the original in type, tread design, and filling. Any variation could cause loss of traction or loss of counterbalance which could result in loss of control of the boomlift.
The counterweight system includes the counterweight itself, the turntable assembly (which includes all parts for the motor), the structural components (which make up the base frame), plus the tires and wheels.
The center of gravity of the counterweight system is utilized to counterbalance the center of gravity created by the load of the elevating assembly and platform assembly plus the workmen, their tools and equipment.
Simply put, the purpose of the counterweight assembly is to keep the boomlift in the upright position when the unit is operated according to the manufacturer's instructions.
Remember: all aerial work platforms are generally intended to be used on a flat level surface!
The lower (emergency) controls must be accessible from the ground level. It is located on or near the base frame of the unit.
Review the operator's manual to identify the exact location. All of these controls will be of the type that automatically returns to the "off" or "neutral" position when released if they are used to control any movement of the lift. IMPORTANT NOTE: Lower controls can override the upper controls.
The Lower controls should only be used during the following conditions:
The platform section on the boomlift is equipped with many safety features such as guardrails (which will be covered under the fall protection section). Let's go over a few details concerning the platform.
The upper control station is located on the platform section. It is where all of the functional controls for the boomlift can be activated. During practical training, the controls will be reviewed in detail.
On the platform section is a deadman safety control footswitch. In order to activate any of the boomlift upper controls, the deadman safety control footswitch must be continually activated before the upper controls will function.
Always consult the load chart indicators prior to your loading the platform to make sure you are operating the boomlift within its safe operating limits.
Whenever a worker is on the platform section, he/she is to remain on the inside of the platform with their feet firmly planted as per manufacturer's instructions.
It is very important to know the correct part names of a boomlift. Click on the numbers to check your answers.
The following sections are important to understand before operating a boomlift.
We will review each item in more detail.
The center of gravity of an object is the point about which all forces of gravity are equal. As the boomlift is operated, the center of gravity on a boomlift changes position. Changes occur when the platform is moved in or out, up or down, forwards or backwards, and rotating left or right. Any inclined (sloping or graded) surface also affects the combined center of gravity.
The Boomlift works on the simple principle of loads balanced over a set of two wheels, the fulcrum. Depending on which set of tires the operator platform is set over, they become the fulcrum. The fulcrum point changes as the platform is elevating and swinging into position.
As you raise, lower, extend, swing, or activate any boom function the fulcrum point, as well as the center of gravity changes as the platform changes its position. Sometimes this change is little and sometimes the change is a lot. The important issue for you to understand and always keep in mind as you operate the boomlift, is that all of the inter-related boomlift forces are always changing.
Another example of the change in fulcrum point.
Maximum allowable weight load includes personnel, their tools and their materials.
As long as you are (1) within the unrestricted load capacity limits, (2) are operating on level ground that will support the units weight and (3) you employ any necessary safety devices you can operate the lift at any height safely.
Unrestricted rated work load capacity decals will always be located at each entrance into the platform and at the operator control stations. You should always verify these decals are in place during your pre-shift inspection.
LOAD CAPACITY – is a specific load carried at a specific distance from the fulcrum wheels and spread evenly over the operator platform.
UNRESTRICTED LOAD CAPACITY – is the maximum allowable weight load allowed in and spread evenly, over the operator platform.
Some boomlifts have multiple ratings. On the PLATFORM ELEVATING ASSEMBLY, the multiple rating chart will show the alternative configurations of elevating assembly retracted versus extended; and elevated versus lowered.
ALTERNATIVE RATED WORK LOADS: when the rated work load of the varying configuration depends on the location of the platform in relation to the base, the manufacturer shall display the appropriate related work load of the configuration of the operator at the control station.
Boomlifts are generally intended to be used on a flat level surface. The Owner's Manual will tell you the limits which will affect the operation of your unit.
Driving on a 15% grade to get to the worksite is acceptable but the boomlift should be operated on a flat level surface. When traveling over a long distance it is advisable to lock the turntable (if the boomlift is equipped with one, the University's is not equipped with this device), keep the boom mast retracted and keep the operator platform at or below the horizontal position with the ground. Do not drive the boomlift on grades or sideslopes exceeding those specified on caution placards or indicated in the Operator's Manual.
The operation of any boomlift is subject to certain hazards that can only be protected against by the intelligence, care, and common sense of the operator.
Here are a few things to remember when refueling the boomlift:
Fall protection is required due to the potential for being bounced out of lift or from climbing out of the basket. A harness is required to be worn when on the platform you must be and be tied off at all times. Remember to inspect the harness prior to use!
Safety lanyard tie-off ring is usually located in the area close to the operator control station. There are 3 on the University's lift.
OSHA requires that boomlifts be inspected.
These reports will be gone over in detail during the Practical Training portion.
You have just completed the instructional portion of the boomlift training. In order to receive credit, you must complete the post test.
For the practical portion of this course, please contact Mike Proctor at 962-5083 to schedule your training. Once both portions of the boomlift training are completed, EHS will mail you an operators' license. If you have any questions regarding this training or any safety and health issue, please contact EHS at (919) 962-5507. In order to receive credit for this training, you much complete the post test.