Prefabricated Components Details

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Prefabricated Components Details
Overview

• Jim Nelson, P.E.
• Iowa Department of Transportation

Iowa ABC Workshop, August 11-12, 2008 Des
Moines, Iowa
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Prefabricated Components Details
Background

• Details for construction using prefabricated
  components are important and must be
  constructible, cost effective and durable
• Details include
• Joints between precast panels
• Post-tensioning ducts and anchorages
• Connections between panels and girders (stud
  pockets)
• Haunch construction
• Box beam connections
• Precast substructure connections

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Deck Panels
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Casting Bed
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Shear Stud Pocket PT Duct
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Transverse Joint Detail
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Keyway and PT Duct Block Out
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Vertical Adjustment of Deck Panels
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Leveling Bolt
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Lifting Loop
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Median Reinforcing Splicers
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Anchorage Zone Spirals
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Deck Panels
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Post-Tensioning
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Stud Pockets
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Construct End of Floor Section
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Class HPC-O PCC Overlay
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Closure Pour Detail
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Precast Approach Slab Layout
25.0'
3 spa. _at_ 20.0'
2 spa. _at_ 14'
6 spa. _at_ 2.0'
Longitudinal PT (1 - 0.6" dia. strands) Transverse
PT (1 - 0.6" dia. strands)
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Prefabricated Components Details
Session Objectives

• Identify details used for accelerated
  construction projects.
• Evaluate best practices and optimization
  opportunities for details to accelerate
  construction, reduce cost and improve long term
  durability.

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Connection Details Used in Iowa