Download - CONCERTE JUMP FORM BUILDING CONSTRUCTION
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CONCERTE JUMP FORMBUILDING
CONSTRUCTION
BYMARK THOMPSON & THOMAS
SMITH
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Uses of the jump form
system •Examples of Types of construction•Size of buildings•Types of systems Fly Ash Silo
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Building Tower
Elevator Shaftor Building Core
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Cooling Tower
ForPower Plant
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Hoover Dam - Pat Tillman Bridge
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One type of Jump form system in use today • Benefits of the
using jump forms
• Fast construction
• Self-climbing form work
• Small work force
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Steps of Jump Form System
• Overview of the system
• How it is set-up• How it work on
jobsite
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Steps of Jump Form System• Continued
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Safety feature
• How the Jump Form beam works
• Jump Form beam
• Anchor bolts• Rollers
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Anchor System
• Anchor bolts• What they do• Why they are
important• What type are
used
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Willow Island Cooling Tower
Jump Form System
• Circa 1978
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• Cathead Crane System• Static Line• Drum Hoist• Static line• Central Loading
Station
Elevation view of cooling tower at Willow Island
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Plan view of cooling tower at Willow Island• Crane System• Catheads• Drum Hoist• Central
Loading Station
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Willow Island Cooling TowerApril 27, 1978 • When things
go wrong?• Concrete
failure• Modification of
Equipment.• Bolts issues• Temperatures
variations
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How this failure could have been prevent• Concrete
testing• Why it is
important• Where it
can be done
• Lab
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What are the consequences
• 51 Dead• $85,000 = $1700 per dead worker•OSHA 10 willful violation & 10 serious•Cited on 2 OHSA violations•Dept. Of Justice, case thrown out