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SFOBB East Span Seismic Safety San Francisco-Oakland Bay San Francisco-Oakland Bay Bridge Bridge East Span Seismic Safety East Span Seismic Safety Project Project
SFOBB East Span Seismic Safety Project
San Francisco-Oakland Bay BridgeSan Francisco-Oakland Bay BridgeEast Span Seismic Safety ProjectEast Span Seismic Safety Project
SFOBB East Span Seismic Safety Project
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.
SFOBB East Span Seismic Safety Project
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
SFOBB East Span Seismic Safety Project
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
SFOBB East Span Seismic Safety Project
Purpose is to identify
• contractors Constructability concerns • concerns with the tower “pick”
SFOBB East Span Seismic Safety Project
Constructability? • a noun• Constructibility?
SFOBB East Span Seismic Safety Project
What can Constructability achieve?
• public and construction safety improvements
• cost reductions and enhanced quality• improved and shortened project schedule
SFOBB East Span Seismic Safety Project
Constructability
• Construction planning and Constructability analysis which integrates the diverse and quite often conflicting criteria into a coherent solution
SFOBB East Span Seismic Safety Project
Constructability
• optimum use of construction knowledge and experience in planning, design, procurement & field operations to achieve overall project objectives (Caltrans Project Engineer Academy)
SFOBB East Span Seismic Safety Project
Constructability
• bid process design - bid - build• considered throughout project delivery up
to award
SFOBB East Span Seismic Safety Project
Constructability is consideration and resolution of barriers to bids
open • no bidders• risk• financing• no materials or cost prohibitive materials• environmental permitting
SFOBB East Span Seismic Safety Project
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 PS&E package
attractive to the bidder?
SFOBB East Span Seismic Safety Project
SAS Constructability Workshop 04-012064
bids open January 2003 , advertises September 2002, and
open for westbound traffic in 2006
SFOBB East Span Seismic Safety Project
where are we on May 13, 2002?
SFOBB East Span Seismic Safety Project
BUY AMERICA WAIVER APPROVED BY FHWA
• Tower Saddle (Upper Portion)• S-Wire Cable Wrapping• MacAlloy Bars
SFOBB East Span Seismic Safety Project
What are the necessary production rates for
• delivery of plate steel,• fabrication,• erection?
SFOBB East Span Seismic Safety Project
lessons learned on other projects that might relate to
Constructability of the tower and orthotropic boxes?
SFOBB East Span Seismic Safety Project
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
