San Francisco-Oakland Bay Bridge East Span Seismic Safety Project

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San Francisco-Oakland Bay BridgeEast Span
Seismic Safety Project
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SAS Constructability Workshop 04-012064

• Self-Anchored Suspension Span consists of a
  160-meter single steel tower with a main cable
  and inclined suspenders supporting two steel
  orthotropic decks of a 385-meter main span and a
  180-meter back span. The workshop will
  concentrate on identification of Constructability
  issues for the tower and orthotropic boxes.

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Participants

• Contractors that plan to bid 04-012064 SAS/YBI
  contract
• steel, fabrication firms that plan to submit
  estimates
• steel plate suppliers, and
  
• Caltrans Project Manager
  

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Purpose is to identify

• the capacity of the domestic steel market to
  produce plate steel for orthotropic boxes and
  tower
• what is fabricators ability to fabricate and
  transport pieces
• what affects contractors ability to bid the
  project due to the above issues

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Purpose is to identify

• contractors Constructability concerns
• concerns with the tower pick

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Constructability?

• a noun
• Constructibility?

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What can Constructability achieve?

• public and construction safety improvements
• cost reductions and enhanced quality
• improved and shortened project schedule

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Constructability

• Construction planning and Constructability
  analysis which integrates the diverse and quite
  often conflicting criteria into a coherent
  solution

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Constructability

• optimum use of construction knowledge and
  experience in planning, design, procurement
  field operations to achieve overall project
  objectives (Caltrans Project Engineer Academy)

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Constructability

• bid process design - bid - build
• considered throughout project delivery up to award

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Constructability is consideration and resolution
of barriers to bids open

• no bidders
• risk
• financing
• no materials or cost prohibitive materials
• environmental permitting

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Constructability is consideration and resolution
of barriers to bids open

• are there responsible bidders
• is there a competitive bidding process bid
  process design - bid - build
• what do we do to make our PSE package attractive
  to the bidder?

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SAS Constructability Workshop 04-012064bids open
January 2003 , advertises September 2002, and
open for westbound traffic in 2006
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where are we on May 13, 2002?
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BUY AMERICA WAIVER APPROVED BY FHWA

• Tower Saddle (Upper Portion)
• S-Wire Cable Wrapping
• MacAlloy Bars

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What are the necessary production rates for

• delivery of plate steel,
• fabrication,
• erection?

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lessons learned on other projects that might
relate to Constructability of the tower and
orthotropic boxes?
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What next

• use the roster to keep in touch
• keep up to date by webpages, dbe, tollbridge,
  office engineer
• bullets and power point presentations on toll web
  page
• BID IT, BUILD IT