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TITLE: |
ES&H Manual |
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DOCUMENT ID: |
6140
Appendix T2 Use of Mobile Cranes on Jefferson Lab Property |
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Material Handling Safety Representative (MHSR)
When mobile
cranes are required at Jefferson Lab the MHSR shall ensure that:
·
Only qualified and insured companies are hired.
·
Ensure that if the crane is entering the Accelerator
site, the Crew
Chief is aware of the location, nature and duration of the work.
·
The company has a proven track record on site. The requesting group shall insure appropriate
oversight.
·
Request feedback from the SOTR about the quality
of work, safe conduct of operations of the subcontractor.
·
The SOTR receives support
as needed from the MHSR, for crane set up, load rigging, safety concerns, etc.
·
If there is a disagreement over
crane set up, how a load should be rigged or any other safety issues, the SOTR defers to the
MHSR for final resolution. In this case
the MHSR assumes the role of SOTR.
Subcontracting Officer’s
Technical Representative (SOTR)
·
When using a mobile crane, the
Group Leader of the managing division shall designate a SOTR for the
subcontracted or leased mobile crane service on Jefferson Lab property.
· It is the SOTR's responsibility to ensure that the MHSR is notified that a mobile crane service is coming on site and that Jefferson Lab safety and quality requirements shall be met and these requirements are communicated to the subcontractor before operations begin.
·
Ensure that the area Safety Warden
knows a mobile crane is scheduled to be operating in his/her area.
·
The ES&H Manual
provides the following guidelines as well as a checklist for the SOTR and/or operator
to use.
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o
The SOTR shall ensure that
the appropriate insurance and inspection documentation is available with the
mobile crane.
o The SOTR should use the Mobile Crane Setup and Operation Checklist that follows in this appendix to assist with setting up and coordinating the operation of the mobile crane or have a Lift Plan. See Figure 1, Lift Plan Template in this appendix.
o
The SOTR is responsible
for the actions of the subcontractor and has the authority and responsibility
to stop work if dissatisfied with the subcontractor's performance.
o The SOTR shall address any safety issues immediately. If the subcontractor fails to rectify the situation to the SOTR's satisfaction, then the work shall be terminated and another subcontractor hired.
o
The SOTR shall ensure that
vehicles or other obstructions are moved as necessary.
o
Shall check clearances under any overhead
obstruction.
o
Shall not permit any operation near overhead power
lines IAW OSHA CFR 29 1910.333 (c) (3).
·
The crane shall be positioned on a solid and level
footing with no more than one degree of grade if possible. It may be necessary in certain situations to
use heavy timber mats to build a good working foundation. Do not assume the operator is completely
aware of his/her surroundings. The SOTR should be
knowledgeable of the surface bearing pressure.
Contact Facilities Management for guidance.
·
When side clearances are tight (2 feet or less),
install a barrier (i.e. orange and white striped barriers, orange cones, or
yellow caution tape) or post a lookout (preferred method) to direct vehicle and
pedestrian traffic, and make certain there is sufficient clearance for tail
swing.
o
RULE to follow: One foot of clearance per one foot
of height of the load. For example if
the load is to be lifted 25 feet high, clearance shall be 25 feet away from the
load, in all directions. If staying further than 25
feet back is not possible, the SOTR/operator shall make every effort to ensure
the quick and safe exit of personnel if something should occur.
·
When a mobile crane is lifting more than 90% of its
rated capacity at a given load radius it should be considered a “Potentially
High Risk Lift” and additional precautions taken. See the Potentially High Risk Lift guidance
in ES&H Manual 6140 Appendix T4 Special Lift and Crane Breakdown
Procedures.
·
When two or more cranes are used
to lift one load, one person shall be designated as the Person in Charge (PIC)
for the operation. This operation shall
be designated as a Critical Lift and shall have at a minimum a Temporary Operational
Safety Procedure (TOSP) written to cover it. The SOTR shall analyze the
operation and instruct all personnel involved in the proper positioning and
rigging of the load. The movement must
always be made with the utmost consideration for safety. The
PIC shall have a TOSP outlining, from
beginning to end, the operational procedures for the lift.
Crane
breakdown In
the event a mobile crane breaks down with a suspended load intact and the load
cannot be lowered safely the PIC/operator shall:
·
Cordon off the area under the
load to prevent personnel from entering.
· Contact the MHSR, SOTR and/or supervisor immediately and inform them of the situation. If they are unavailable ESH&Q staff shall be contacted. They shall assist with or take charge of the situation and ensure the area under the suspended load is suitability cordoned off and posted.
·
A suspended load shall not be
left unattended at any time
·
When significant disagreement exists regarding the
safe use of a mobile crane:
o
Stop all operations, secure the load, and ensure the
safety of personnel in the area.
o
Involve the SOTR, /Supervisor/PIC, MHSR, and the
Contractor
o
All parties involved must reference the following:
§
OSHA 29 CFR 1910 (General Industry)
§
ANSI B-30 series
Mobile
Crane Setup Checklist
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Issue Date: |
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Expiration Date: |
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Lift
Description: |
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Location: |
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Risk classification (See ES&H Manual Chapter 3210 Appendix T3 Risk Code Assignment.) |
Without mitigation measures (4, 3, or 2): |
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With specified measures implemented (1 or 0): |
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Person
In Charge: |
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Date: |
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The
SOTR, supervisor, and operator shall conduct a meeting and have a walk around
the area in which the mobile crane would be set up. |
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Conduct
a pre-lifting briefing with all personnel involved with the mobile crane set
up and operation. |
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Ensure
the load bearing surface is sufficient to handle the weight of the crane and
the load. Note:
When setting up on asphalt during hot weather (above 90° F) it will not
provide the same support as during cooler times and additional support should
be provided by using large wooden mats (4 feet square minimum) under the
outriggers. |
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All
personnel involved in the operation shall have appropriate PPE for the task. Note:
Appropriate PPE for the work area shall be determined by the SOTR. At a minimum hard hats and safety shoes/boots shall be
required. |
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The
operator shall be a certified crane operator. (Ref.
ASME/ANSI B30.5a 5-3.1.2 and OSHA) |
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No
power lines are located within the load radius plus the required clearance. (Contact Facilities Management if unknown power rating)
Otherwise follow the ASME/ANSI B30.5a “(1) for lines rated up to 50 kv, a minimum clearance between the lines and any part of
the care load shall be 10 feet (3 m).” Add an additional one foot for every 10 kv above 50 kv. |
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Signaler
is familiar with standard hand signals for controlling crane operations. |
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Weather
conditions are acceptable: No thunderstorms, heavy winds or rains are
forecast. When a local weather storm warning exists,
the SOTR may use his discretion to secure operations at any point. For example, no storm warning may be posted, but the
SOTR may notice some thunder and lightning. At this
point the job shall be suspended. The crane shall
lower and secure its boom. If wind speed exceeds 20
mph as measured at the MCC, the SOTR shall stop work and wait for a calmer
day unless the crane manufacturer’s manual specifically addresses conducting
operations safely at higher wind speeds. |
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The
SOTR or PIC shall ensure that the operator is aware that he/she shall respond
only to signals from the person who is directing the lift or the appointed
signal person. However, the operator shall obey a
stop signal at all times, no matter who gives it. |
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The
load to be lifted must be within the rated capacity of the crane in its
existing configuration as per the crane manufacturer's published lifting
capacity. |
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When
loads that are not accurately known are to be lifted, the SOTR responsible
for the lift shall ensure that the weight of the load does not exceed the
crane ratings at the radius at which the load is to be lifted by either the
crane’s own or a portable dynometer. |
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Operations
shall be conducted in such a manner and at such speeds as to minimize dynamic
effects. (Definition: Dynamic effect - loads
introduced into the machine or its components due to acceleration or
deceleration forces.) |
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The load shall be attached to the hook by means
of slings or other devices of sufficient capacity. |
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The operator shall not leave the controls while
the load is suspended. |
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The area under the load shall be cordoned off to
ensure that personnel are not permitted to stand or pass under a suspended
load. |
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If the load hoist mechanism is not equipped with
an automatic brake and the load must remain suspended for any considerable
length of time, the operator shall prevent the drum from rotating in the
lowering direction by activating the foot operated brakes. |
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As an exception to the last paragraph; under
those circumstances where a load is to be held suspended for a period of time
exceeding normal lifting operations, the operator may leave the controls
provided that prior to that time, the appointed SOTR and operator have
established the requirements for restraining the boom hoist, telescoping,
load, swing, outriggers functions, and provide notices, barricades, or
whatever other precautions may be necessary. |
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Conduct a post-lift debriefing to evaluate the
lift and critique the performance of all involved. Note: The debrief should be documented and
copies kept by the supervisor and SOTR for future reference.
If a lift plan was used, any problems or incidents should be noted so
the lift plan may be modified as appropriate for the next time it is used. |
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Lift
Plan
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Issue Date: |
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Expiration Date: |
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Lift
Description: |
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Location: |
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Risk classification (See ES&H Manual Chapter 3210 Appendix T3 Risk Code Assignment.) |
Without mitigation measures (4, 3, or 2): |
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With specified measures implemented (1 or 0): |
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Person
In Charge: |
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Date: |
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Lift
Criteria |
Notes/Comments |
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1. What item(s)
will be lifted? |
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2. Are there any
special precautions (such as parts for mobile cranes)? |
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3. What is the
weight of each item and total weight of the load? (For mobile cranes, see the manufacturer’s
instructions about components and attachments that must be considered as part
of the load |
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4. Where is the
center of gravity located? Note: The
center of gravity of an object is that point at which the object will balance. A stable load is one in which the center of gravity of
the load is directly below the main hook and below the lowest point of
attachment of the slings. |
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5. List
each piece of equipment, accessory, and rigging component, by type and rated capacity, that will be used during the lift. |
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a.
Crane |
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b. Hoist |
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c. Fork Truck |
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d. Slings
(identify the configuration used: choker, basket, or vertical, and angle (see
Figure 1 below) |
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e. Shackles |
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f. Eye
Bolts/Swivel Eyes |
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g. Turnbuckles |
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h. Spreader
Bars |
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i.
Hook (Type and WLL) |
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j. Other
(Special Lifting Fixture, Below the Hook Lifting Devices, Multi Leg Bridle,
etc) |
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6.
Are there designated checkpoints or hold points? |
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7. If yes, list them and their
estimated instrument readings, as relevant, so that job progress can be
checked against the plan. |
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8. How will you rig the load? |
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9. Will tag lines be needed to control
the load? |
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10. What personnel will you need to
assist with the lift? |
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a. Crane
operator |
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b. Riggers |
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c. Spotters |
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d. Tag Line
Handlers |
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e. Fork truck
driver |
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f. Other |
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11. Safety equipment (hard hats,
safety shoes, gloves) |
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12. Mobile Crane location |
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a. Will crane
be set up on concrete? If yes, can concrete support
the weight of the crane and the load? |
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b. Will crane
be set up on asphalt? If yes, will cribbing be
needed (for asphalt temp > 90° F)? |
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c. Will crane
be set up on gravel or rough ground? If yes,
cribbing will be required. |
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13. Are any of the structures listed
below located in the area of the crane set up? If
yes, indicate their location on the Load Path Sketch |
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a. Manholes |
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b. Underground
voids |
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c.
Pipe chases |
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d. Overhead
obstructions or power lines |
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14. Additional information |
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Figure
1

The
chart in the middle offers a handy guide for assessing the effective angle of
the sling to the relative weight. It is
always better to limit the angle of the sling.
Further, such changes in sling angle must be accounted for in lifts that
are close to the sling weight limit and/or for critical lifts (greater than 90%
of the crane limit).
Rigging
Sketch

Identify the following on your
sketch:
a.
Lift point identification
b.
Method(s) of attachment
c.
Load angle factors (e.g., vertical and horizontal vectors of sling loads)
d.
Sling angles
e.
Accessories used
f.
Other factors affecting the equipment capacity
g.
Rated capacity of equipment in the configuration(s) in which it will be used. (For mobile cranes, many factors affect rated
capacity, including boom length, boom angle, and work area.)
Load
Path Sketch

A load-path sketch shows the load path and height at
key points in the job. For lifts with
mobile cranes, include the crane position(s) relative to the load and relative
to surrounding obstructions. Where appropriate,
include floor or soil-loading diagrams. Indicate
lifting and travel speed limitations if applicable.
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ISSUING
AUTHORITY |
APPENDIX
AUTHOR |
APPROVAL
DATE |
EFFECTIVE
DATE |
EXPIRATION
DATE |
REV. |
Page 10 of 10 |
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ESH&Q Division |
08/26/05 |
08/26/05 |
08/26/08 |
0 |
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