Bucket Truck Chainsaw

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Bucket Truck Chainsaw
Ohio Department
of Transportation
Bucket Truck Chainsaw
Office of Training: Equipment Training Section
September 2006
Bucket Truck Chainsaw
Table of Contents:
Course Schedule.............................................................................................................................. ii
Abstract .......................................................................................................................................... iv
Learning Objectives ....................................................................................................................... iv
Lesson One: Introduction to Chain Saw Bucket Truck Operation ................................................. 1
Lesson Two: Personal Safety & Fall Protection ............................................................................. 9
Lesson Three: Pre-Trip Inspection................................................................................................ 27
Lesson Four: Work Zone .............................................................................................................. 33
Lesson Five: Operation ................................................................................................................. 47
Lesson Six: Field Exercises .......................................................................................................... 67
Appendix A: OSHA Regulations
Appendix B: EM – 78/HE Pre-Trip Inspection Form
Appendix C: Aerial Lift Daily Inspection Checklist
Appendix D: EM – 44 Operator’s Report
Appendix E: Body Harness & Lanyard Inspection Report
Appendix F: Tailgate Safety Talk
Appendix G: Tying Knots
Appendix H: Case Scenarios
Office of Training: Equipment Training Section
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Bucket Truck Chainsaw
September 2006
Course Schedule
Activity
Start
Duration
Title
Abstract
8:30 a.m.
5 minutes
Abstract and Learning Objectives
Lesson One
8:35 a.m.
30 minutes
Introduction to Chain Saw Bucket Truck
Operation
Lesson Two
9:05 a.m.
45 minutes Personal Safety & Fall Protection
Break
9:50 a.m.
10 minutes
Lesson Three
10:00 a.m.
15 minutes Pre-Trip Inspection
Lesson Four
10:15 a.m.
30 minutes Work Zone
Lesson Five
10:45 a.m.
45 minutes Operation
Lunch
11:30 a.m.
60 minutes
Lesson Six
12:30 a.m.
180 minutes Field Exercises
Adjourn
3:30 p.m.
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Office of Training: Equipment Training Section
Bucket Truck Chainsaw
September 2006
Office of Training: Equipment Training Section
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Bucket Truck Chainsaw
September 2006
Abstract
Providing safe and efficient travel for Ohio’s citizens has been the first priority of the Ohio
Department of Transportation since its inception. In recent years, the role of ODOT’s
maintenance program has become increasingly vital. As traffic volumes soar, the emphasis on
maintaining and protecting Ohio’s existing highway infrastructure has greatly increased. The role
of the maintenance work force is more important now than ever.
The bucket trucks used in combination with a chainsaw are versatile pieces of equipment which
assist ODOT’s Highway Technicians in meeting today’s maintenance challenges. Bucket trucks
are used daily to perform such tasks as removing vegetation which obscures signs or causes sight
distance problems, removing overhanging limbs that may fall and cause an accident, assisting
with sign installation, and serving as the primary machinery for signal inspection, maintenance,
and emergency work.
This course is designed to provide participants introductory information on performing aerial tree
trimming from a bucket truck. Topics covered will include pre-trip, set-up, personal safety, basic
operation, and clean-up. Additional reference materials for this topic are the Chainsaw
Operations Manual and the Bucket Truck Operations Manual.
Learning Objectives
The learning objectives for this course are as follows:
iv
•
How to conduct a pre-trip inspection
•
Equipment selection
•
Correct set-up of the work-zone
•
Danger and safety considerations while trimming from a bucket truck
•
Proper use of the chainsaw while in the bucket and proper tree trimming
techniques
•
Tying knots
Office of Training: Equipment Training Section
Lesson One
Bucket Truck Chainsaw
September 2006
Lesson One: Introduction to Bucket Truck Chainsaw Operation
LESSON ONE:
Introduction to Bucket
Truck Chainsaw Operation
Office of Training: Equipment Training Section
1
Bucket Truck Chainsaw
September 2006
Lesson One
A. Conditions Requiring a Bucket Truck Chainsaw
Conditions Requiring a Bucket Truck
Chainsaw
„ County garages are held accountable for any
road obstructions impeding the flow of traffic
or causing a potential hazard such as broken
or overhanging limbs
1. County garages are held accountable for any road obstructions impeding
the flow of traffic or causing a potential hazard such as broken or
overhanging limbs
Figure 1-1
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Office of Training: Equipment Training Section
Lesson One
Bucket Truck Chainsaw
September 2006
2. Weather conditions can cause potential hazards on the roadway
Operating Conditions Requiring a
Bucket Truck Chainsaw
„ Weather conditions can cause potential
hazards on the roadway
„
„
High winds, tornados and violent storms
Winter storms, heavy snowfall and ice events
a. High winds, tornados and violent storms
b. Winter storms, heavy snowfall and ice events
Figure 1-2
Office of Training: Equipment Training Section
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Bucket Truck Chainsaw
September 2006
Lesson One
3. There are numerous reasons for aerial tree removal with a chainsaw and
bucket truck
Operating Conditions Requiring a
Bucket Truck Chainsaw (cont.)
„ There are numerous reasons for aerial tree
removal with a bucket truck chainsaw
„
„
„
Overhanging trees or limbs
Rotten trees or limbs
Tree thinning for sunlight to shine on roadway and
to remove sign obstructions
a. Overhanging trees or limbs which may strike a vehicle
b. Rotten trees or limbs which may eventually fall onto the roadway
c. Basic tree thinning to allow the sun to shine into shaded areas and
prevent slick road conditions, which allows salt to react more rapidly
d. Provide an unobstructed view of traffic signs and signals
Figure 1-3
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Office of Training: Equipment Training Section
Lesson One
Bucket Truck Chainsaw
September 2006
B. Job Duties
Job Duties
„ Untrained personnel
„ Personnel who have not received proper training in
bucket truck tree trimming should be assigned other
job duties until properly trained
„ Trained personnel
„ Trained Highway Technicians with experience
operating a bucket truck and chainsaw will be
assigned with less experienced operators to guide
the trainees in safe and proper on-the-job training
1. Untrained personnel
a. Personnel who have not received proper training in bucket truck tree
trimming should be assigned other job duties until properly trained.
Other job duties include:
i.
Traffic control
ii. Dragging brush to the chipper
iii. Observing the bucket truck operator and tree trimmer
2. Trained personnel
•
Trained Highway Technicians with experience operating a bucket truck
and chainsaw will be assigned with less experienced operators to guide
the trainees in safe and proper on-the-job training
Office of Training: Equipment Training Section
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Bucket Truck Chainsaw
September 2006
Lesson One
3. Experienced ground leader
Job Duties (cont.)
„ Experienced ground leader
„ The ground leader must
have a thorough
knowledge of the job
a. The ground leader must have a thorough knowledge of the job
b. The ground leader must be capable of operating the upper and lower
controls of the bucket truck
c. The ground leader must maintain eye contact with the tree trimmer and
the bucket truck operator to facilitate communication with the bucket
truck operator, tree trimmer and ground workers
d. Ensure no unauthorized personnel enter the workzone
e. Ensure all workers follow the guidelines of safe bucket truck chainsaw
operations
f. Ensure all personnel have been properly trained
g. Ensure all equipment has been pre-tripped and is in safe operating order
h. Ensure everyone has the proper personal protective equipment (PPE)
i. Notify the supervisor of trees or limbs hanging on power lines, and cease
operations
j. Have garage and emergency contact numbers available
k. Establish proper traffic control
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Office of Training: Equipment Training Section
Lesson One
Bucket Truck Chainsaw
September 2006
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Office of Training: Equipment Training Section
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Bucket Truck Chainsaw
September 2006
Lesson One
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Office of Training: Equipment Training Section
Lesson Two
Bucket Truck Chainsaw
September 2006
Lesson Two: Personal Safety & Fall Protection
LESSON TWO:
Personal Safety & Fall
Protection
Office of Training: Equipment Training Section
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Bucket Truck Chainsaw
September 2006
Lesson Two
A. Operator Requirements
Operator Requirements
„ Good eyesight
„ Mobility
„ Hearing
„ Overall physical condition
„ Mental alertness
„ Experience
„ Awareness
1. Good eyesight
•
Depth perception, distance and peripheral vision are all needed for
proper operator performance
2. Mobility
a. Ability to safely climb in and out of the bucket
b. Ability to move around inside the bucket to improve visibility
3. Hearing
•
Ability to detect and identify unusual noises
4. Overall physical condition
a. Medical considerations prior to equipment operation include:
i.
Back problems
ii. Stiffness
iii. Medication side affects
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Office of Training: Equipment Training Section
Lesson Two
Bucket Truck Chainsaw
September 2006
iv. Any other physical limitation which could affect the ability to
operate efficiently and safely
5. Mental alertness
a. Potential obstacles include:
i.
Personal problems
ii. Distractions (cell phones, etc.)
iii. Stress
iv. Lack of sleep
6. Experience
•
Experience must be considered, but inexperience can be overcome by
formal or on-the-job training
7. Awareness
a. Operators need to be aware of hazards associated with:
i.
Equipment
ii. Themselves
iii. Their crew
iv. The public
Office of Training: Equipment Training Section
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Bucket Truck Chainsaw
September 2006
Lesson Two
B. Operator Personal Protective Equipment (PPE) and Proper Safety Apparel
Operator Personal Protective
Equipment (PPE)
„ The Occupational Safety and Health
Administration (OSHA) requires, by law,
employees exposed to certain types of
hazards in their duties wear personal
protective equipment to guard against injuries
resulting from accidents
1. The Occupational Safety and Health Administration (OSHA) requires, by
law, employees exposed to certain types of hazards in their duties wear
personal protective equipment to guard against injuries resulting from
accidents (see Appendix A).
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Office of Training: Equipment Training Section
Lesson Two
Bucket Truck Chainsaw
September 2006
2. While operating a chainsaw, the employee should wear the following PPE
in addition to taking safety precautions
Operator Personal Protective
Equipment (PPE)
„ Proper clothing
„ Proper footwear
„ Head protection
„ Eye protection
„ Hearing protection
„ Gloves
„ Safety vests
„ Leg protection
3. Proper clothing
a. Should not be bulky because bulky clothing restricts movement
b. Should be fitted
•
Loose fitting clothing can snag controls or get caught when
entering or exiting equipment
c. Dress in layers and add or remove layers as needed
d. Do not wear
i. Jewelry
ii. Any item which could become snagged and cause damage or
injury
4. Proper footwear
•
A leather boot with ankle protection is recommended
Office of Training: Equipment Training Section
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Bucket Truck Chainsaw
September 2006
Lesson Two
5. Head protection
a. A hard hat with a face screen is required
i. The hard hat should fit snugly so it does not move when you turn
your head, but not so tight as to cause discomfort
ii. A logging helmet is recommended (see Figure 2-1)
Figure 2-1
b. Secure long hair or wear it under a hat so that it doesn’t obstruct your
view or become entangled
6. Eye protection
a. Safety glasses are required
i. Make sure they are clean, fit properly, and are safety rated ANSI
Z87.1
ii. Over-the-counter sun glasses are not considered proper eye
protection unless they have the ANSI Z87.1 stamp on them
b. Corrective lenses may be worn under the face screen
7. Hearing protection
a. Plain cotton balls are not an acceptable protective device
b. Earmuffs or earplugs are required
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Office of Training: Equipment Training Section
Lesson Two
Bucket Truck Chainsaw
September 2006
8. Gloves
a. Leather, or equivalent, is required to keep gloves from snagging in the
chain
b. Wear the appropriate size for your hands
c. Should fit snugly enough to allow the operator to feel the controls
9. Safety vests
•
A safety vest shall be worn at all times unless supervision deems it to be
a secondary hazard
10. Leg protection
•
Cut-retardant chaps for ground workers and bucket operators are
required
Office of Training: Equipment Training Section
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Bucket Truck Chainsaw
September 2006
Lesson Two
C. Fall Protection System
Fall Protection System
„ The fall protection
system is vital to ensure
safety during bucket
truck chainsaw
operation
„ Designed to protect
personnel from the risk
of falls when working at
elevated heights
1. The fall protection system is vital to ensure safety during bucket truck
chainsaw operation
2. Designed to protect personnel from the risk of falls when working at
elevated heights
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Office of Training: Equipment Training Section
Lesson Two
Bucket Truck Chainsaw
September 2006
D. Fall Protection Equipment
Fall Protection Equipment
„ Full body harness
„ Body support device
„ Lanyard
„ Nylon strap
1. Full body harness (see Figure 2-2)
•
A body support device used to protect the body from injury in case of a
fall. Consisting of connected straps, it is designed to distribute the
resulting force evenly over the thighs, shoulders and pelvis. Other
components, such as a lanyard, shall be attached to the harness.
Figure 2-2
Office of Training: Equipment Training Section
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Bucket Truck Chainsaw
September 2006
Lesson Two
2. Lanyard (see Figure 2-3)
a. A nylon strap used to secure a full body harness to an approved anchor
point
b. Shock absorbing lanyard (ODOT)
c. Retractable lanyard
d. Expiration date is located on the service tag
e. Maximum length of a lanyard used during bucket truck chainsaw
operations is 2 feet
Figure 2-3
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Office of Training: Equipment Training Section
Lesson Two
Bucket Truck Chainsaw
September 2006
3. Anchor
Fall Protection Equipment (cont.)
„ Anchor
„ The manufacturer’s
approved point to
attach the lanyard from
the full body harness
to the bucket truck
•
The manufacturer’s approved point to attach the lanyard from the full
body harness to the bucket truck
Office of Training: Equipment Training Section
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Bucket Truck Chainsaw
September 2006
Lesson Two
E. Fall Protection Equipment Inspection
Fall Protection Equipment Inspection
„ Inspect daily or at the start of each shift
„ Severe working conditions require frequent
inspections
„ Defective equipment shall not be used
1. Inspect daily or at the start of each shift
2. Severe working conditions require frequent inspections
3. Defective equipment shall not be used
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Office of Training: Equipment Training Section
Lesson Two
Bucket Truck Chainsaw
September 2006
4. Full body harness
Fall Protection Equipment Inspection
(cont.)
„ Full body harness
„ Check harness for frayed edges,
broken fibers, pulled stitches, cuts or
chemical damage
„ Check D-rings and snaps for
distortion, cracks, breaks, and rough
or sharp edges
„ Check for expiration date
„ Check operator’s manual for proper
sizing
„ Once harness has been used in a
fall, it needs to be disposed
a. Check harness for frayed edges, broken fibers, pulled stitches, cuts or
chemical damage
b. Check D-rings and snaps for distortion, cracks, breaks, and rough or
sharp edges
c. Check for expiration date on service tag
•
The expiration date is effective once the harness and/or lanyard
has been date-stamped into service by ODOT
d. Check operator’s manual for proper sizing
e. Once harness has been used in a fall, it needs to be disposed
Office of Training: Equipment Training Section
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Bucket Truck Chainsaw
September 2006
Lesson Two
5. Lanyard
Fall Protection Equipment Inspection
(cont.)
„ Lanyard
„ Check for frayed edges, broken
fibers, pulled stitches, cuts or
chemical damage
„ Check snaps for distortion
cracks, corrosion, or obstruction
„ Check for expiration date printed
on the service tag
„ ODOT requires a shock
absorbing lanyard of 2 feet
a. Check for frayed edges, broken fibers, pulled stitches, cuts or chemical
damage
b. Check snaps for distortion cracks, corrosion, or obstruction
c. Check for expiration date printed on the service tag
d. ODOT requires a shock absorbing lanyard of 2 feet
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Office of Training: Equipment Training Section
Lesson Two
Bucket Truck Chainsaw
September 2006
6. Anchor
Fall Protection Equipment Inspection
(cont.)
„ Anchor
„ Check that approved anchor point is securely
mounted per manufacturer’s specifications
„ Check for distortion, cracks or damage
a. Check that approved anchor point is securely mounted on the boom per
manufacturer’s specifications
b. Check for distortion, cracks or damage
Office of Training: Equipment Training Section
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Bucket Truck Chainsaw
September 2006
Lesson Two
F. Fall Protection Procedures
Fall Protection Procedures
„ Requirements
„
„
„
Proper training must be completed
Use the proper protection system
Protection system is required for heights
greater than 6 feet
1. Requirements
a. Proper training must be completed and followed in order to reduce the
risk of fall hazards
i. Training must be conducted without exposing the employee to a
potential fall hazard
ii. Training should be repeated periodically
b. The proper fall protection system must be used when working at heights
of 6 feet or greater
c. Before going up in the bucket, secure the safety harness and lanyard to
an approved anchor D-ring only
d. Never secure the lanyard to an adjacent structure or to another portion of
the bucket truck
e. Never use the approved D-rings or snap hooks for anything other than
attaching a lanyard to the safety harness. Foreign objects attached to the
D-rings or snap hooks may prevent proper engagement of the snap hook.
f. Never use the harness or lanyard straps to hoist or suspend other loads
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Office of Training: Equipment Training Section
Lesson Two
Bucket Truck Chainsaw
September 2006
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Bucket Truck Chainsaw
September 2006
Lesson Two
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Office of Training: Equipment Training Section
Lesson Three
Bucket Truck Chainsaw
September 2006
Lesson Three: Pre-Trip Inspection
LESSON THREE:
Pre-Trip Inspection
Office of Training: Equipment Training Section
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Bucket Truck Chainsaw
September 2006
Lesson Three
A. Pre-Trip: Bucket Truck, Chainsaw, Body Harness and Lanyard
Pre-Trip: Bucket Truck, Chainsaw,
Body Harness and Lanyard
„ Bucket Truck
„ Chainsaw
„ Body Harness & Lanyard Inspection Report
1. Bucket truck
a. Equipment inspection starts with the use of the EM-78/HE, ODOT’s
Vehicle Pre-Trip Inspection Form (see appendix B)
b. Fill it out completely and explain any exceptions at the bottom of the
form
•
Exceptions are explanations on why certain sections are not
completed on the form (i.e., trailer, plow, etc.)
c. Complete the Aerial Lift Daily Inspection Checklist (see appendix C)
d. After inspection of the equipment and completion of the EM-78/HE and
the Aerial Lift Daily Inspection Checklist, complete a form EM-44
Operator’s Report (see appendix D) and turn it in to the mechanic if any
work needs to be completed on the equipment
e. Operator’s manual inspection form
i.
Every operator’s manual will contain a daily inspection form for
the specific bucket truck
ii. If any item is found to be unsatisfactory after completing the
daily inspection form, the bucket truck shall immediately be
placed out of service until maintenance work can be properly
completed by certified personnel
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Office of Training: Equipment Training Section
Lesson Three
Bucket Truck Chainsaw
September 2006
2. Chainsaw
a. Check saw for any loose, missing or cracked parts
b. Check chain for wear and sharpness
c. Check bar for wear, cracks or bends
d. Check fuel and oil levels
e. Ensure the chain brake is operating correctly
f. Start saw and check to be sure bar oil is flowing correctly
3. Complete the Body Harness & Lanyard Inspection Report (see appendix E)
B. Additional Tools
Additional Tools
„
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„
„
„
„
„
„
Rope
Chainsaws
Round and flat files
Extra bars and chains
Wedges and Axes
Pre-mixed fuel
Bar oil
Chainsaw wrench
Lanyard for chainsaw
1. Be sure to have all of the tools necessary to complete the job
2. Tools recommended for a tree trimming operation
a. Rope
•
3/4 inch rope a minimum of 100 feet long
Office of Training: Equipment Training Section
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Bucket Truck Chainsaw
September 2006
Lesson Three
b. Chainsaws
•
Appropriate size chainsaw for the job
c. Round file
i.
Steel file is used to sharpen the chainsaw
ii. Appropriate round file for the chain size
d. Flat file
•
Steel file is used to file the rakers with a depth gauge
e. Extra bars and chains
f. Wedges and lineman’s axe
g. Pre-mixed fuel
h. Bar oil
i. Chainsaw wrench specific to your brand of chainsaw
j. Lanyard for chainsaw
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Office of Training: Equipment Training Section
Lesson Three
Bucket Truck Chainsaw
September 2006
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Bucket Truck Chainsaw
September 2006
Lesson Three
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Office of Training: Equipment Training Section
Lesson Four
Bucket Truck Chainsaw
September 2006
Lesson Four: Workzone
LESSON FOUR:
Workzone
Office of Training: Equipment Training Section
33
Bucket Truck Chainsaw
September 2006
Lesson Four
A. Know the Work Area
Know the Work Area
„ Make the necessary work assignments
„ Upon arriving at the work area, be certain to
comply with all workzone rules and
regulations concerning proper workzone set
up
1. Make the necessary work assignments
•
A tailgate safety talk prior to leaving for the work area will help clarify
work assignments and provide valuable safety information (see
Appendix F)
2. Upon arriving at the work area, be certain to comply with all workzone
rules and regulations concerning proper workzone set up according to the
Ohio Manual of Uniform Traffic Control Devices (OMUTCD)
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Office of Training: Equipment Training Section
Lesson Four
Bucket Truck Chainsaw
September 2006
Know the Work Area (cont.)
„ Watch for overhead obstructions
„ Know the weight limitations in relation to the
work area
„ Make sure all lights and warning signs are
visible
3. Watch for overhead obstructions
a. Power or utility lines
b. Low hanging limbs
c. Overpasses
4. Know your weight limitations in relation to the work area
a. Bridges
b. Soft shoulders
5. Make sure all lights and warning signs are visible
Office of Training: Equipment Training Section
35
Bucket Truck Chainsaw
September 2006
Lesson Four
B. Set Up the Workzone
Set Up the Workzone
„ Set up for proper
traffic control
1. Set up for proper traffic control
a. Upon arriving at the area to be cleared, set up the proper traffic control
devices to alert oncoming traffic
b. Proper signing
c. Trained flaggers
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Office of Training: Equipment Training Section
Lesson Four
Bucket Truck Chainsaw
September 2006
C. Assess the Hazards
Assess the Hazards
„ Be aware of all hazardous conditions and do
not create a potential hazard
1. Be aware of all hazardous conditions and do not create a potential hazard
a. Do not perform any bucket truck chainsaw operation during any of the
following weather conditions or when the following situations are
observed
i.
Thunderstorms
Office of Training: Equipment Training Section
37
Bucket Truck Chainsaw
September 2006
Lesson Four
Assess the Hazards (cont.)
„ High winds
„ Snow and ice storms
„ Poor visibility
ii. High winds (30 mph)
iii. Snow and ice storms
iv. Poor visibility (fog, etc.)
v.
Rotten trees or limbs which may fall and endanger crew
members working below
vi. Danger trees (trees leaning into the tree being trimmed)
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Office of Training: Equipment Training Section
Lesson Four
Bucket Truck Chainsaw
September 2006
Assess the Hazards (cont.)
„ Limbs and vines under tension
vii. Limbs and vines under tension
a) Can snap back at the chainsaw operator when the cut is
complete
b) May pinch the chainsaw bar and chain
c) Could cause a kickback situation
Office of Training: Equipment Training Section
39
Bucket Truck Chainsaw
September 2006
Lesson Four
Assess the Hazards (cont.)
„ Clear work area
„ Trees around power or telephone lines
2. Clear work area
•
It is important to have the work area as clutter free as possible
3. Trees around power or telephone lines
•
40
Stay away from power lines. If the work area contains any power lines
(downed or otherwise), do not work in the area and notify your manager
immediately.
Office of Training: Equipment Training Section
Lesson Four
Bucket Truck Chainsaw
September 2006
Assess the Hazards (cont.)
„ Always shut the chainsaw off before
repositioning the bucket
„ Fire hazards
„ Fueling precautions
4. Always shut the chainsaw off before repositioning the bucket
5. Fire hazards
a. Keep bucket free of sawdust build-up
b. Clean up all spills
c. Keep the chainsaw clean
6. Fueling precautions
a. Never fuel a chainsaw while it is running
i.
Sparks from an already hot motor can create a fire hazard
ii. Wait a few minutes for the motor to cool before refueling to
prevent burn injuries
b. Fill the fuel tank in an open area
c. Never fuel a chainsaw while in the bucket
d. Keep the fuel supply at least ten feet away from the area of operation
e. Fuel the chainsaw at least ten feet away from the area of operation
Office of Training: Equipment Training Section
41
Bucket Truck Chainsaw
September 2006
Lesson Four
Assess the Hazards (cont.)
„ A fire extinguisher and a first aid kit shall be
located at the worksite
7. A fire extinguisher and a first aid kit shall be located at the worksite
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Office of Training: Equipment Training Section
Lesson Four
Bucket Truck Chainsaw
September 2006
D. Determine Where to Safely Place the Bucket Truck
Determine Where to Safely Place the
Bucket Truck
„ Perform the operating procedures in the
proper order
1. Perform the operating procedures in the following order
a. Position the vehicle on a firm and level surface providing adequate
support
i. Set the parking brake as soon as the truck has been positioned
ii. Park the truck in an area which will allow the entire task to be
completed without moving the truck
iii. Stay away from power lines. If the work area contains any
power lines (downed or otherwise), do not work in the area and
notify the manager immediately.
a) Personnel who do work around power lines as a part of
their daily work assignment will receive the appropriate
training at a later date
b) Working around power lines is not a part of this basic
course
iv. Chock the wheels while the machine is in use as an additional
safety precaution
Office of Training: Equipment Training Section
43
Bucket Truck Chainsaw
September 2006
Lesson Four
E. Work Environment
Work Environment
„ Survey surroundings
1. Survey surroundings
a. Survey the site for drop offs and embankments
b. Be aware of all side and overhead obstructions, especially power lines
c. Ensure all other vehicles and unauthorized personnel are out of the area
d. Know the location of your coworkers before beginning
e. Be aware at all times of potentially hazardous conditions which may
develop as you are operating the chainsaw or bucket truck
f. Check the vehicle’s foundation, the bucket’s elevation, trees, limbs,
vines and surroundings
g. Watch for coworkers or others who may walk into the work area, putting
themselves and you at risk
h. Ground crews should be cautious of snow, mud, or loose gravel
44
Office of Training: Equipment Training Section
Lesson Four
Bucket Truck Chainsaw
September 2006
F. Determine Cutting Order
Determine Cutting Order
„ Things to consider when determining the
cutting order
1. Things to consider when determining the cutting order
a. Cut away any potential hazards such as vines and rotten or broken limbs
b. Determine the fall of limbs before cutting
c. Be aware of potential hazards
d. Do not permit workers to be in the clear zone (any area under the bucket
where a fall hazard is present)
Office of Training: Equipment Training Section
45
Bucket Truck Chainsaw
September 2006
Lesson Four
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Office of Training: Equipment Training Section
Lesson Five
Bucket Truck Chainsaw
September 2006
Lesson Five: Operation
LESSON FIVE:
Operation
Office of Training: Equipment Training Section
47
Bucket Truck Chainsaw
September 2006
Lesson Five
A. Preparing for the Task
Preparing for the Task
„ Determine the chainsaw size
1. Determine the chainsaw size
a. Each job must be reviewed to determine the size of saw necessary to
complete the assignment
b. Lightweight saws require less strength and endurance, which results in
less strain
c. Light work with a heavy saw may result in fatigue
48
Office of Training: Equipment Training Section
Lesson Five
Bucket Truck Chainsaw
September 2006
Type
Guide Bar Length
Recommended Use
Minisaws
6 to 8 inches
Light cutting and pruning
10 to 12 inches
Usually weighing less than
10 pounds, these saws are
best suited for limbing,
small-log cutting, pruning
and occasionally felling
small trees
14 to 18 inches
Usually weighing between
10 and 15 pounds, these
saws are recommended for
tree felling, limbing and log
cutting
20 or more inches
Large saws weighing more
than 15 pounds with long
bars are best used by
professionals for heavy
cutting of large wood and in
felling operations
Lightweight
Midweight
Heavyweight
Office of Training: Equipment Training Section
49
Bucket Truck Chainsaw
September 2006
Lesson Five
2. Have a well sharpened chainsaw
Preparing for the Task (cont.)
„ Have a well-sharpened chainsaw
a. To avoid kickbacks
b. To avoid getting the saw stuck
c. To reduce operator fatigue
50
Office of Training: Equipment Training Section
Lesson Five
Bucket Truck Chainsaw
September 2006
3. Ensure the chain has proper tension
Preparing for the Task (cont.)
„ Ensure the chain has proper tension
a. Release the chain guard and inspect for proper tension of the chain
b. To avoid improper settings for the chain, please follow the tensioning
procedure specific to your chainsaw as described in the owner’s manual
Office of Training: Equipment Training Section
51
Bucket Truck Chainsaw
September 2006
Lesson Five
Preparing for the Task (cont.)
„ Start the chainsaw
„ Wear a safety harness with the lanyard
attached to the boom when working in the
bucket
„ Set the brakes and position outriggers on
pads on a solid surface. Use wheel chocks
on an incline
„ Extend the bucket to the area that you will be
cutting
4. Start the chainsaw
a. Cold start the chainsaw on the ground using proper starting procedures,
allow the chainsaw to warm up and then shut it off. This allows the saw
to start easily when in the bucket.
b. The ONLY time you may drop-start a chainsaw is when you are in the
bucket
•
This is accomplished by dropping the saw with a firm grip on the
handle and pulling the starter cord at the same time
5. Wear a safety harness with a lanyard attached to the D-ring on the boom
when working in the bucket
a. The harness system shall allow a free fall of 2 feet or less
b. Body belts are not permitted
6. Set the brakes and position outriggers on pads on a solid surface; use wheel
chocks on an incline
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Office of Training: Equipment Training Section
Lesson Five
Bucket Truck Chainsaw
September 2006
7. Extend your bucket to the area where you will be cutting
a. Make certain you have the proper reach
b. Do not move the bucket truck when the boom is elevated, or while the
trimmer is in the bucket
c. Do not exceed boom and bucket load limits; check weight restrictions
d. Do not over-extend the boom
Figure 5-1
e. Never have more than one person in the bucket
f. Tying off to an adjacent structure while working in or on a bucket truck
is prohibited
Office of Training: Equipment Training Section
53
Bucket Truck Chainsaw
September 2006
Lesson Five
B. Limbing Procedures
Limbing Procedures
„ Use proper personal protective equipment
(PPE)
„ Have secure footing in the bucket
1. Use proper personal protective equipment (PPE)
2. Have secure footing in the bucket
a. Do not work off balance
b. Keep the bucket floor clean
c. Do not sit or climb on the edge of the bucket or use planks, ladders, or
other devices to establish a work position
d. Keep your feet in contact with the floor of the bucket at all times
54
Office of Training: Equipment Training Section
Lesson Five
Bucket Truck Chainsaw
September 2006
Limbing Procedures (cont.)
„ Start limbing from the
bottom of the tree and
work toward the top
„ Make periodic stops to
allow for removal of
brush buildup on the
ground
3. Start limbing from the bottom of the tree and work toward the top
•
Prevents the limbs from catching while falling to the ground
4. Make periodic stops to allow for removal of brush buildup on the ground
•
To avoid potential injury from falling objects, swing the boom so that
the bucket is not located above the ground crew
Office of Training: Equipment Training Section
55
Bucket Truck Chainsaw
September 2006
Lesson Five
5. Follow the steps in the diagram below for limbing a tree branch (see Figure
5-2)
a. Limbing undercut to avoid splintering (1)
b. Limbing cut to avoid pinching (2)
•
Use a wedge to prevent the saw from pinching
c. Stub undercut to avoid pinching (3)
d. Final stub cut (4)
e. Do not cut past branch bark ridge (5)
6-10’’
2
Final
stub
cut
4
Limbing cut to avoid
pinching
2-4’’
1
3
5
Limbing undercut to
avoid splintering
Stub undercut to avoid
splintering
Branch bark ridge
Figure 5-2
56
Office of Training: Equipment Training Section
Lesson Five
Bucket Truck Chainsaw
September 2006
Limbing Procedures (cont.)
„ To reduce kickback danger, do not limb with
the tip of the saw
„ Watch for the “spring” or “jump” of limbs in a
bind
„ Use extreme caution when cutting branches
under tension
6. To reduce kickback danger, do not limb with the tip of the saw
7. Watch for the "spring” or “jump" of limbs in a bind
a. If there are numerous branches in a cluster:
i.
Be aware of the surrounding branches and their tension
•
A branch under tension can spring suddenly, causing
injury to the operator of the chainsaw
ii. Be aware of branches resting against each other
•
Branches resting against each other may cause the
chainsaw to kickback due to the saw bar’s upper quadrant
coming in contact with a branch other than the one you
are cutting
iii. When cutting a branch from the bottom side, be aware of when
the branch is under stress
a) The branch may pinch the chain and bar, trapping the
chainsaw between the two pieces of wood
b) If the chainsaw becomes pinched, assess the situation and
determine the best means for freeing the saw
1) Rock the blade to loosen it from the wood
Office of Training: Equipment Training Section
57
Bucket Truck Chainsaw
September 2006
Lesson Five
2) Secure the first saw with a rope or lanyard and use
a second saw to cut the first saw free
8. Use extreme caution when cutting branches under tension
a. Make several shallow cuts first at the top of bend to release the tension
before completely cutting through
b. To prevent pinching the chainsaw bar, do not under cut freely hanging
limbs
c. Start at the bottom and work your way to the top of the tree
d. Make a small undercut to allow the limb to bend
e. In certain situations you can make a small open notch to cause a limb to
fall a certain direction
f. If a limb is in a bind, make several small cuts to release the tension
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Office of Training: Equipment Training Section
Lesson Five
Bucket Truck Chainsaw
September 2006
Limbing Procedures (cont.)
„ Kickback awareness
„ Preventive measures for operating a
chainsaw while in a bucket truck
„ Restrictions while tree trimming from a bucket
truck
9. Kickback awareness
a. Avoid using the nose of the saw
b. Keep your saw sharp
c. Keep two hands on the saw at all times
d. Watch for obstructions
10. Preventive measures for operating a chainsaw while in a bucket truck
a. Look at ground personnel before making a cut
b. Keep bucket slightly above the limb being cut
c. Limbs which cannot be dropped safely should be lowered with a rope
(see Appendix G)
d. Do not leave cut branches in a tree; drop or lower them safely to the
ground
Office of Training: Equipment Training Section
59
Bucket Truck Chainsaw
September 2006
Lesson Five
11. Restrictions while tree trimming from a bucket truck
Figure 5-3
a. No cutting above the head
b. No leaning out of the bucket
c. Do not use the bucket to help cut or move a limb
d. Improper use of the lanyard and PPE
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Office of Training: Equipment Training Section
Lesson Five
Bucket Truck Chainsaw
September 2006
C. Job Wrap-Up
Job Wrap-Up
„ Upon job completion and before moving the
bucket truck for travel, inspect the boom to
ensure it is properly cradled and outriggers
are in the stowed position
„ Brush clean-up
1. Upon job completion and before moving the bucket truck for travel,
inspect the boom to ensure it is properly cradled and outriggers are in the
stowed position
a. Collect any pads from under the outriggers
b. Properly store all ropes, harnesses, lanyards and chainsaws
2. Brush clean-up
a. Use a chipper whenever possible
b. Avoid leaving brush and cut materials which can cause a ditch
obstruction
c. Brush clean up is aesthetically pleasing to the motoring public
Office of Training: Equipment Training Section
61
Bucket Truck Chainsaw
September 2006
Lesson Five
D. Maintenance Procedures on Bucket Truck, Chainsaws and Safety Equipment
Maintenance Procedures on Bucket Truck,
Chainsaws and Safety Equipment
„ Daily
„ Periodic
„ Storage of Equipment
1. Daily
a. Clean chainsaw after each use
b. Use an air hose to clean any dirt, sawdust or oil buildup
c. Inspect saw for loose or broken parts
d. Inspect air filters
e. Clean the bucket
f. Check for any breaks in the frame, boom or bucket
g. Check for any broken welds
h. Grease and fuel the bucket truck
i. Install bucket cover
2. Periodic
a. Consult the owner’s manual for items which may need to be replaced on
the chainsaw
b. Drain and flush the fuel tank on the chainsaw
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Office of Training: Equipment Training Section
Lesson Five
Bucket Truck Chainsaw
September 2006
c. Consult your mechanic for service due on the bucket truck
d. Consult your bucket truck owner’s manual for periodic maintenance
3. Storage of equipment
a. Store equipment properly so in the event of an emergency, there will not
be an equipment failure
b. Equipment should always be stored indoors
E. Causes of Tree Trimming Accidents (see Appendix H)
Causes of Tree Trimming Accidents
„
„
„
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„
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„
„
„
„
„
Lack of training
Failure to use safety devices
Leaning out of bucket
Unstable bucket truck
Poor job assessment
Faulty equipment
Chainsaw kickback
Improper equipment
Exceeding weight limits
Electrocution
Overhanging limbs
1. Causes of accidents occurring while operating a chainsaw from a bucket
truck
a. Lack of training
b. Failure to use safety devices such as safety harnesses and lanyards, or
using them incorrectly
Office of Training: Equipment Training Section
63
Bucket Truck Chainsaw
September 2006
Lesson Five
c. Leaning out of bucket while trimming (see Figure 5-4)
Figure 5-4
d. Unstable bucket truck (outriggers, elevation, wheel chocks)
e. Poor job assessment (soft shoulder, broken or dead overhead limbs and
vines)
f. Faulty equipment
g. Chainsaw kickback from a dull chain or the utilization of the chainsaw
nose
h. Not using specified equipment
i. Exceeding the weight limits in the bucket
j. Electrocution (see Figure 5-5)
Figure 5-5
k. Being struck by overhanging limbs
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Office of Training: Equipment Training Section
Lesson Five
Bucket Truck Chainsaw
September 2006
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Bucket Truck Chainsaw
September 2006
Lesson Five
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Office of Training: Equipment Training Section
Lesson Six
Bucket Truck Chainsaw
September2006
Lesson Six: Field Exercises
LESSON SIX:
Field Exercises
Office of Training: Equipment Training Section
67
Bucket Truck Chainsaw
September 2006
Lesson Six
A. Participant Field Exercises
1. Participants will be working in pairs
y
Participants will work through the exercises, alternating turns in the
bucket and on the ground
2. Complete a pre-trip of the bucket truck
3. Complete a pre-trip of the chainsaw
4. Complete a pre-trip of the harness and lanyard
5. Put on fall protection equipment
6. Start the vehicle and confirm the outriggers are operating properly by
running them through a complete set-up and close-down cycle
7. Properly set up the vehicle worksite and prepare the vehicle to be used
8. Participants will then alternate completing the following exercises:
a. Cold starting the saw on the ground
b. Proper entry and exit of the equipment
c. Demonstrating the proper use of fall protection equipment
d. Maneuvering the bucket from the ground
i.
Up/down and into and out of the cradle
ii. Swinging the bucket to the left and to the right
iii. Maneuvering the bucket forward and backwards
iv. Returning the bucket and boom to the cradle within the truck
e. Maneuvering of the bucket from within the bucket
i.
Up/down and into and out of the cradle
ii. Swinging the bucket to the left and to the right
iii. Maneuvering the bucket forward and backwards
iv. Maneuvering the bucket to a stationary position
v.
Drop-starting chainsaw procedures
vi. Shutting down and securing the chainsaw
vii. Returning the bucket and boom to the cradle within the truck
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Office of Training: Equipment Training Section
Lesson Six
Bucket Truck Chainsaw
September2006
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Bucket Truck Chainsaw
September 2006
Lesson Six
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Office of Training: Equipment Training Section
Appendix A: OSHA Regulations
Appendix B: EM – 78/HE Pre – Trip Inspection Form
Appendix C: Aerial Lift Daily Inspection Checklist
Appendix D: EM – 44 Operator’s Report
Appendix E: Body Harness & Lanyard Inspection Report
Appendix F: Tailgate Safety Talk
Appendix G: Tying Knots
Knot type: Figure 8 on a bite
Knot type: Clove Hitch
Knot type: Bowline Knot
Bowline: Note that the tail of the rope should come out on the inside of the loop; the knot is
much weaker if this end finishes on the outside of the loop. The knot must be backed up by
tying off the tail as in (c).
Knot type: Figure 8 Rewoven:
Appendix H: Case Scenarios
Here are some reported accidents to OSHA:
1) Summary OSHA Accident Inspection 1099688358
An employee was trimming a tree near an overhead power line. The employee
misjudged the distance, cut the branch, and it fell on the line. The employee, who was
still holding onto the branch, was electrocuted.
Always keep a safe distance from power lines.
2) Summary of OSHA Accident Inspection 126621820
While working in a tree, an employee disconnected one lanyard to move around some
limbs. After climbing approximately 60 feet up the tree, he disconnected the second
lanyard before reconnecting the first. The employee fell and died of head injuries.
Always make sure all safety lines are connected.
3) Summary of OSHA Accident Inspection 123561540
A tree trimmer was cutting a branch when a gust of wind blew the branch into contact
with a 35-kilovolt power line. The trimmer, who was touching the branch and tree
was electrocuted.
Be cautious of sudden wind changes.
4) Summary of OSHA Accident Inspection 120169669
An employee was trimming trees and cutting downed limbs. The tip of his chainsaw
struck a limb and kicked back, striking him across the neck. He died due to a severe
cut to his throat.
Always insert the blade fully to reduce kickback.
5) Summary of OSHA Accident Inspection 101439917
Two employees were in the bucket of an aerial lift and failed to set the outriggers. As
the truck began to overturn, the bucket fell. One employee was killed and the other
sustained a broken leg.
Always set the outriggers to stabilize the truck.
6) Summary of OSHA Accident Inspection 110070489
A tree trimmer was working from the bucket of an aerial lift. He was not using fall
protection equipment. When the truck shifted forward, the employee was thrown
from the aerial lift and killed.
Always use a safety harness or belt and a lanyard when working in an aerial lift.
7) Summary of OSHA Accident Inspection 111961413
An employee was operating an aerial lift when the boom fell from the truck, causing
the employee to fall with it. Nine of the bolts which secured the boom to the truck
were rusty, indicating old breaks, and had sheared off. The employee suffered head,
leg and internal injuries.
Always perform a pre-trip inspection.
8) Summary of OSHA Accident Inspection 115595266
A tree trimmer was working from an aerial lift when the unit overturned. The
employee had failed to set the front outriggers. He fractured his upper jaw and
sustained severe cuts to his head.
Always set the outriggers to stabilize the lift.
9) Summary of OSHA Accident Inspection 104389390
An employee was operating an aerial lift when it overturned and pinned him to the
ground beneath the bucket. The ground was too soft for operation and the outriggers
slid off the pads and into the ground, causing the lift to overturn.
Do not proceed if the ground is too soft for operation.
10) OSHA Accident Inspection 119957934
An employee was trimming a pine tree when he fell about thirty feet from an aerial
bucket. He sustained a fractured skull, wrist, ribs and ankle.
Always wear fall protection equipment when working in an aerial lift device.
11) Summary of OSHA Accident Inspection 123175911
A tree trimmer cut the top off of a pine tree. As it fell, it hit the boom, causing the
employee to be catapulted from the bucket. He was not wearing the safety belt that
was attached to the bucket. He died of massive bodily injuries.
Remember to wear and attach fall protection equipment.
12) Summary of OSHA Accident Inspection 300645199
An employee was stacking limbs that were being cut by a worker in an aerial lift. The
lift operator dropped a large limb to the ground. The employee, who was not wearing
a hard hat, walked beneath the lift and was struck on the head by the limb and killed.
The lift worker was not aware the employee was underneath the bucket.
Always know where your coworkers are before lowering anything to the ground.