TITLE:

ES&H Manual

 

DOCUMENT ID:

6140 Appendix T2

Use of Mobile Cranes on Jefferson Lab Property

 

 

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.

 

Text Box: NOTE: The operator has overall responsibility for ensuring the load is safe for lifting.

 

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

 

Work Stoppage

·         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

§  ES&H Manual

Mobile Crane Setup Checklist

Issue Date:

 

Expiration Date:

 

Lift Description:

 

Location:

 

Risk classification

(See ES&H Manual Chapter 3210 Appendix T3 Risk Code Assignment.)

Without mitigation measures (4, 3, or 2):

 

With specified measures

implemented (1 or 0):

 

Person In Charge:

 

Date:

 

 

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.

 

Conduct a pre-lifting briefing with all personnel involved with the mobile crane set up and operation.

 

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.

 

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.

 

The operator shall be a certified crane operator. (Ref. ASME/ANSI B30.5a 5-3.1.2 and OSHA)

 

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.

 

Signaler is familiar with standard hand signals for controlling crane operations.

 

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.

 

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.

 

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.

 

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.

 

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.)

 

The load shall be attached to the hook by means of slings or other devices of sufficient capacity.

 

The operator shall not leave the controls while the load is suspended.

 

The area under the load shall be cordoned off to ensure that personnel are not permitted to stand or pass under a suspended load.

 

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.

 

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.

 

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.

 

Lift Plan

Issue Date:

 

Expiration Date:

 

Lift Description:

 

Location:

 

Risk classification

(See ES&H Manual Chapter 3210 Appendix T3 Risk Code Assignment.)

Without mitigation measures (4, 3, or 2):

 

With specified measures

implemented (1 or 0):

 

Person In Charge:

 

Date:

 

Lift Criteria

Notes/Comments

1.    What item(s) will be lifted?

 

2.    Are there any special precautions (such as parts for mobile cranes)?

 

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

 

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.

 

5.    List each piece of equipment, accessory, and rigging component, by type and rated capacity, that will be used during the lift.

 

a. Crane

 

b. Hoist

 

c. Fork Truck

 

d. Slings (identify the configuration used: choker, basket, or vertical, and angle (see Figure 1 below)

 

e. Shackles

 

f. Eye Bolts/Swivel Eyes

 

g. Turnbuckles

 

h. Spreader Bars

 

i. Hook (Type and WLL)

 

j. Other (Special Lifting Fixture, Below the Hook Lifting Devices, Multi Leg Bridle, etc)

 

6. Are there designated checkpoints or hold points?

 

7. If yes, list them and their estimated instrument readings, as relevant, so that job progress can be checked against the plan.

 

8. How will you rig the load?

 

9. Will tag lines be needed to control the load?

 

10. What personnel will you need to assist with the lift?

 

a. Crane operator

 

b. Riggers

 

c. Spotters

 

d. Tag Line Handlers

 

e. Fork truck driver

 

f. Other

 

11. Safety equipment (hard hats, safety shoes, gloves)

 

12. Mobile Crane location

 

a. Will crane be set up on concrete? If yes, can concrete support the weight of the crane and the load?

 

b. Will crane be set up on asphalt? If yes, will cribbing be needed (for asphalt temp > 90° F)?

 

c. Will crane be set up on gravel or rough ground? If yes, cribbing will be required.

 

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

 

a. Manholes

 

b. Underground voids

 

c. Pipe chases

 

d. Overhead obstructions or power lines

 

14. Additional information

 

 

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.

 

 

 

ISSUING AUTHORITY

APPENDIX AUTHOR

APPROVAL DATE

EFFECTIVE DATE

EXPIRATION DATE

REV.

Page

10 of 10

 

 

ESH&Q Division

Neal Wilson

08/26/05

08/26/05

08/26/08

0

 

This document is controlled as an on line file.  It may be printed but the print copy is not a controlled document.  It is the user’s responsibility to ensure that the document is the same revision as the current on line file.  This copy was printed on 10/13/2009.