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