tower cranes crane activity hazard analysis designated qualified person list of weights for each...
TRANSCRIPT
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TOWER CRANES
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TOWER CRANETYPES
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Could be remote control or cab operated.
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TOWER CRANEERECTION PROCEDURES
PREPARATORY1. Manufacturers inst.2. Erection procedure3. Foundation design4. Layout sketch
Power linesOther structuresOther cranes
5. AHA6. Qualified person
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TOWER CRANEACTIVITY HAZARD ANALYSIS
Designated qualified personList of weights for each pieceSketch of all adjacent areasNames and quals of operatorsNames and quals of riggersAll crane structural support informationSystem of communicationRadio frequency approval
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CRITICAL KNOWLEDGE OF PARTS, WEIGHTS, ERECTION PROCEDURES
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Tower Crane Post Erection Procedures
Test Components1. Crane Supports2. Brakes, clutches limit
switches, all overload switches, audible/digital warning, locking & safety devices.
3. Load hoisting & lowering.4. All swing motions5. Load testing IAW
manufacturers printed instructions.
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TOWER CRANESAFETY PROCEDURES
QUALIFIED OPERATORS
QUALIFIED RIGGERS
UNATTENDED CRANESMUST BE LEFT IN THEWEATHERVANEPOSITION (FREE SWING)
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EXAMPLE OF CONGESTED LOCATION
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TIGHT & UNIQUE LOCATIONS OF SOMETOWER CRANES
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TOWER CRANE DAILY OPERATIONCONSIDERATIONS
1. WIND 20 MPH - or asper manufacturer
2. Fall Protection-Access
3. Communications &Signals by one person only!
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Tower Crane Operator Available Certification
Resources
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Tower Crane Operator Training Resources:
Tower Crane Simulation Training
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Test your knowledge and understanding - review some basic components:
TrolleyCounterweight
Foundation
Rotating Structure
Operator Cab
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Some crane types or manufacturers require piling installation
A sampling of some common rules to be aware of established by one manufacturer based on crane design parameters include:
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Wind hazard
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Lightening hazard (ground structure)
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Tower Crane Installation Documentary:NAVFAC NORTHWEST
•A safe tower crane installation begins with advanced pre planning assured by a professional government and contractor team (a good idea to include a representative from the manufacturer as well – most require it):
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Tower crane foundations (key) -are carefully designed by a professional:
•Tower crane foundation work and quality assurance/control serves as the basis for your tower crane installation success:
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Installing the vertical tower sections:
•The tower sections similar to the one pictured below will arrive by truck:
•Remember two cranes if required = critical lift:
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Installing tower vertical sections:
•Tower cranes requires and erection plan: Don’t forget employees must be positioned in a manner such that no part of their body is directly under the load.
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100 % fall protection (no exceptions)
•100% fall protection considerations during erection is essentialand should be carefully planned out ahead of time:
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Rotating structure
•All steps are critical but probably the most critical is placing the rotating structure. It is very heavy and unbalanced so the lifting crane capacity should be validated (remember 80% or more requires a critical lift plan and never more than 90% in any configuration per guide specification).
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Horizontal members (one at a time):
• Installing the remaining horizontal counter weight and jib sections is a balance that must follow the manufacturers installation requirements closely.
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Electrical installation:
•Don’t forget to assure a safe grounded electrical installation and lock out tag out considerations:
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Days done:
•Once erected all operations and load tests can begin in accordance with the manufacturers instructions:
Special thanks to those of the NAVFAC Northwest team responsible for documenting the tower crane erection.
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Sample Mishaps
•Tower crane mishaps
Sample mishaps to review what can go wrong.
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