NOAO NORTH CRITICAL LIFT PLAN FOR OVERHEAD CRANES …CRITICAL LIFT PLAN FOR OVERHEAD CRANES...
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NOAO – NORTH 10/17/2018 Page 1 of 16 CRITICAL LIFT PLAN FOR OVERHEAD CRANES DOC#: 2100-AD-015-0100-CLP DESI-4503_V3 Refer to #1000-AD-015-0010 Crane SOP Date: Prepared By: Andrew Lambert Location: Mayall Dome Other: A "critical lift" is defined as any non-routine crane lift requiring detailed planning and additional or unusual safety precautions. Critical lifts include: lifts made where the load weight is greater than 75% of the rated capacity of the crane; lifts which require load to be lifted, swung or placed out of the operator's view; lifts made with more than one crane; lifts involving non-routine/technically difficult rigging arrangement; hoisting personnel with a crane or derrick; or any lift which the crane operator believes should be critical. A. TOTAL LOAD 1. Load Weight (net load) 1,770 lbs. 2. Wt. of Lifting Beam 330 lbs. 3. Wt. of Sling/Shackles 100 lbs. 4. Other: lbs. 5. TOTAL WT(gross load) 2,200 lbs. Note: Source of load weight (Drawing, Calcs, etc.) must be attached on Page 2 B. CRANE 1. Type of Crane 5 T Crane 2. Maximum Crane Capacity 10,000 lbs. 3. Gross Load of Crane 2200 lbs. 4. Lift is 22% of the Cranes rated capacity 5. Note any non-standard conditions here. C. HOIST ROPE Main Aux 1 Aux 2 1. # of Parts NA NA 2. Rope Diameter 3. Capacity D. RIGGING See Attached Drawings/Diagrams 1. Hitch Type(s) Straight 2. No. of Slings: 4 Size: 4 ft 3. Sling Type (material): nylon 4. Sling Assembly Capacity: 6,200 Lbs. ea. 5. Shackle Size(s): 4 x 3/8 & 1 x 1 1/4 6. Shackle Rated Capacity(s) 4 x 4,000 lbs. 136,000 lbs. 7. Sling, shackle, hoist ring vendors & part numbers: See Attached Sheets 8. Expected Service Load 2,200 9. Torque for Hoist Rings-Check for Proper torques where applicable. N/A E. Signal Person Info./ Radio Check 1. Crane Operator briefed on who is Responsible for each point of lift? YES/NO 2. Names and location of each signal person recorded? YES/NO 3. Are all signal people on-station before lift starts? YES/NO 4. All Signal people must state their name and that they “have the hook”? YES/NO 5. Are all Radios on Channel 2 before moving the crane? (when required) YES/NO 6. Operators daily crane checklist completed and signed? YES/NO F. OPERATOR QUALIFICATIONS 1. Certified Operator? YES/NO 2. Certified Rigger/Signal Person YES/NO YES/NO YES/NO G. PRE-LIFT CHECKLIST (YES) N/A (NO) 1. Crane Inspected 2. Rigging Inspected 3. Overhead Hazard Check 4. Swing Check 5. Tag Lines 6. Area Traffic Hazard Check 7. Signatures 8. Pinch Point Hazard Check 9. Set-Down Point Check H. SIGNATURES 1. Crane Operator 2. Lift Supervisor 3. Rigger 4. 1 st Signal Person 5. 2 nd Signal Person 6. Other (state title) 7. Other (state title)
Transcript of NOAO NORTH CRITICAL LIFT PLAN FOR OVERHEAD CRANES …CRITICAL LIFT PLAN FOR OVERHEAD CRANES...
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10/17/2018 Page 1 of 16
CRITICAL LIFT PLAN FOR OVERHEAD CRANES DOC#: 2100-AD-015-0100-CLP DESI-4503_V3 Refer to #1000-AD-015-0010 Crane SOP
Date: Prepared By: Andrew Lambert
Location: Mayall Dome Other:
A "critical lift" is defined as any non-routine crane lift requiring detailed planning and additional or unusual safety precautions. Critical lifts include: lifts made where the load weight is greater than 75% of the rated capacity of the crane; lifts which require load to be lifted, swung or placed out of the operator's view; lifts made with more than one crane; lifts involving non-routine/technically difficult rigging arrangement; hoisting personnel with a crane or derrick; or any lift which the crane operator believes should be critical.
A. TOTAL LOAD
1. Load Weight (net load) 1,770 lbs.
2. Wt. of Lifting Beam 330 lbs.
3. Wt. of Sling/Shackles 100 lbs.
4. Other: lbs.
5. TOTAL WT(gross load) 2,200 lbs. Note: Source of load weight (Drawing, Calcs, etc.) must be attached on Page 2
B. CRANE 1. Type of Crane 5 T Crane
2. Maximum Crane Capacity 10,000 lbs.
3. Gross Load of Crane 2200 lbs.
4. Lift is 22% of the Cranes rated capacity
5. Note any non-standard conditions here.
C. HOIST ROPE Main Aux 1 Aux 2
1. # of Parts NA NA
2. Rope Diameter
3. Capacity
D. RIGGING See Attached Drawings/Diagrams
1. Hitch Type(s) Straight
2. No. of Slings: 4 Size: 4 ft
3. Sling Type (material): nylon
4. Sling Assembly Capacity: 6,200 Lbs. ea.
5. Shackle Size(s): 4 x 3/8 & 1 x 1 1/4
6. Shackle Rated Capacity(s) 4 x 4,000 lbs.
136,000 lbs.
7. Sling, shackle, hoist ring vendors & part numbers:
See Attached Sheets
8. Expected Service Load 2,200
9. Torque for Hoist Rings-Check for Proper torques
where applicable. N/A
E. Signal Person Info./ Radio Check 1. Crane Operator briefed on who is
Responsible for each point of lift? YES/NO
2. Names and location of each signal person recorded?
YES/NO
3. Are all signal people on-station before lift starts?
YES/NO
4. All Signal people must state their name and that they “have the hook”?
YES/NO
5. Are all Radios on Channel 2 before moving the crane? (when required)
YES/NO
6. Operators daily crane checklist completed and signed?
YES/NO
F. OPERATOR QUALIFICATIONS
1. Certified Operator? YES/NO
2. Certified Rigger/Signal Person YES/NO
YES/NO
YES/NO
G. PRE-LIFT CHECKLIST (YES) N/A (NO)
1. Crane Inspected
2. Rigging Inspected
3. Overhead Hazard Check
4. Swing Check
5. Tag Lines
6. Area Traffic Hazard Check
7. Signatures
8. Pinch Point Hazard Check
9. Set-Down Point Check
H. SIGNATURES
1. Crane Operator
2. Lift Supervisor
3. Rigger
4. 1st Signal Person
5. 2nd Signal Person
6. Other (state title)
7. Other (state title)
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Rigging Components: Actek 3/8” Shackle, 2 Ton WLL, MPN AK60002
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Actek 1-3/8” Shackle, 18 Ton WLL, MPN AK60016
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Nylon Wear-Resistant Eyeless Web Slings, 1” wide x 3’ long, 6200 lb vertical WLL, McMaster PN 3360T28
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Rigging Diagram:
Figure 1: Spectrograph Rigging Diagram, all below-the-hook rigging is shown
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Center of Gravity Schematic:
Figure 2: Center of gravity (CG) schematic, CG is below lift points and centered under pick point
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Load Calculations:
Weights of all rigging components are summed below, with factors of safety against the working load
limits calculated.
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The calculated factors of safety are all greater than one, with the lowest being the M16 hoist ring at the
top of the 4-pt beam, with FOS ~ 1.9
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Lifting Beam FEA:
Boundary Conditions: Fixed Support at Hoist Ring Pick Point, 1,699 lbf load normal to each of the hoist
ring landing faces to simulate the spectrograph + rigging load
Figure 3: FEA boundary conditions
Total deformation of 8.4mm at corners as seen in Figure 4 below
Figure 4: Total Deformation
Maximum equivalent stress is shown next, with maximum stress shown where the square beam meets with plate that the M16 hoist ring picks from.
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Figure 5: Max Equivalent Stress
Mesh refinement study showed that this maximum stress exhibits singularity behavior cannot be accurately evaluated through mesh refinement, however since the material is linear-elastic, equivalent stress is plotted along the load path as seen in Figure 6.
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Figure 6: Equivalent stress plotted along load path
Equivalent stress results are extracted and plotted in Excel. Fitting a line to the data prior to the elbow and reading the y-intercept yields the real stress at this location.
Figure 7: Linearized Stress along load path to maximum
As Figure 7 indicates, the maximum stress is 37.1 MPa at this location. In reality, this location has a fillet weld. Shigley suggests a permissilbe tensile stress in a butt weld as 0.60*YieldStrength, this strength de-rating will be applied here
y = -0.975x + 37.131R² = 0.9045
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Equivalent Stress
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Linear (Filtered)
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despite the fact the this is a fillet weld (however it is in tension, hence the use of Shigley’s guideline). The persmissible stress is then 213 MPa. The 4-pt lifting beam has a factor of safety equal to 5.7 against material yield strength and 13.2 against material failure. LBNL PUB3000 requirements indicate a factor of safety > 5 against material ultimate strength, thus the fixture design meets LBNL requirements. The 4pt lifting beam is load rated to 1984 lbs. It has been load test to slightly more than 2X this weight, 4210 lbs. Please note that during this test, the M16 hoist ring on the top of the 4pt beam lifting fixture experienced a load condition that exceeds its rated load. Both this hoist ring and its mating bolt are being replaced with new hardware.
Figure 8: 4pt Lifting Beam load test to 4210 lbs
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OPERATOR, RIGGER, SIGNAL PERSON QUALIFICATIONS
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Rigging/Signal Person Certified –
Name
Date Class
Retaken Expiration
Date
Sign if working on lift
Date of Lift
Abraham Daniel 1/11/2018 1/11/2021
Ball William 10/1/2018 10/1/2021
Blaine Keith 1/11/2018 10/1/2018 10/1/2021
Donaldson John 1/11/2018 1/11/2021
Dunlop Patrick 10/1/2018 10/1/2021
Evatt Matt 1/11/2018 1/11/2021
Hawes Mike 10/1/2018 10/1/2021
Joyce Richard 10/1/2018 10/1/2021
Lane Steve 10/1/2018 10/1/2021
Lavoie Tammie 10/1/2018 10/1/2021
Moreno Victor 1/11/2018 1/11/2021
Reddell Larry 1/11/2018 1/11/2021
See Mark 1/11/2018 1/11/2021
Sprayberry David 10/1/2018 10/1/2021
Stephens Stanley 10/1/2018 10/1/2021
Stephenson Devin 10/1/2018 10/1/2021
Stupak Bob 1/11/2018 1/11/2021
Wortman Fred 1/11/2018 1/11/2021
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Overhead Crane Certified –
Name
Date Class
Retaken Expiration
Date
Sign if working on lift
Date of Lift
Abraham Daniel 1/11/2018 1/11/2021
Ball William 1/11/2018 1/11/2021
Blaine Keith 1/11/2018 1/11/2021
Demmer Paul 1/11/2018 1/11/2021
Donaldson John 1/11/2018 1/11/2021
Evatt Matt 1/11/2018 1/11/2021
Garcia Leander 1/11/2018 1/11/2021
McCollam Bill 1/11/2018 1/11/2021
Moreno Victor 1/11/2018 1/11/2021
Reddell Larry 1/11/2018 1/11/2021
See Mark 1/11/2018 1/11/2021
Stupak Bob 1/11/2018 1/11/2021
Wortman Fred 1/11/2018 1/11/2021
Zazueta Alfredo 1/11/2018 1/11/2021
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SITE PLAN
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Site Plan
The DESI Spectrograph begins on the ground floor and is lifted through the hatch to the main floor, where is it set down on its handling care near the Coude room, as depicted below,
