560 likes | 779 Views
San Francisco-Oakland Bay Bridge East Span Seismic Safety Project In Bay Foundation/SAS Superstructure Constructability Workshop Nov. 20, 2002. In Bay Foundation/SAS Superstructure Constructability Workshop. November 20, 2002 Holiday Inn Bay Bridge 1800 Powell Street Emeryville, California.
E N D
San Francisco-Oakland Bay BridgeEast Span Seismic Safety Project In Bay Foundation/SAS Superstructure Constructability Workshop Nov. 20, 2002
In Bay Foundation/SAS Superstructure Constructability Workshop
November 20, 2002Holiday Inn Bay Bridge1800 Powell StreetEmeryville, California
9:00 Welcome9:05 Opening Remarks9:15 Where we are now9:30 Business Enterprise Outreach9:45-10:30 Technical Issues/Changes since May 13, 20021030-1045 Break10:45-1:00 Open discussion with contractors regarding above mentioned issues
SFOBB Project Manager Heavy Civil Construction Contractors Fabricators, Suppliers Who are we?
meeting is mechanism to inform the contracting community of the upcoming SAS Superstructure and In Bay foundation contracts. meeting is a way to create a dialogue with contractors, especially on issues of concern. for example we heard at May 13, 2002 workshop, mobilization payment for an "over the water" job does allow an acceptable cash flow for primes. We effected a change to the Public Contract Code for jobs of $25 millionover water Why are we here?
PowerPoint Meeting notes Handouts Tools
no decisions to be made discussion only to take place speakers keep to their time dialogue to follow decorum in order to create an atmosphere of respect Ground Rules
understand changes made to Construction Contract since May 13, 2002 meeting understand Contractor Constructability concerns with In Bay Foundation and SAS Superstructure Contracts What can we accomplish
Brian Maroney - Project Manager Mike Halverson and Rob Kobal : note takers Bill Zanetich - Duty Senior Design Team Other Introductions
OAKLAND TOUCHDOWN SKYWAY YBI SAS Existing Bridge
Smaller contracts that focus specific types of construction work create more opportunities for DBE and small business participation SAS/YBI Discretization
T1/E2 foundations (04-0120E4) Transition structure (04-0120H4) E2 Retrofit/Substation (04-0120G4) T1 SAS superstructure (04-0120F4) W2 foundation (04-0120C4) Building demolition (04A1701) Yerba Buena Island YBI/SAS Contracts
San Francisco-Oakland Bay BridgeEast Span Seismic Safety Project
bid open December 10, 2002 Gross Quantities 16,000 cubic meter structural excavation 12,000 cubic meter structural concrete 2,300,000 kg bar reinforcing steel 258,500 kg structural steel W2 Structures 04-0120C4
advertise the YBI Substation and Viaduct Retrofit in December, 2002 Bid Open Feb 25, 2003 Gross Quantities 66,900 kg bar reinforcing steel 350 cubic meter structural concrete YBI Substation & Retrofit 04-0120G4
Gross Quantities 1640 cubic meter structural concrete, bridge 3,960,000 kg structural steel (bridge) 2,550,000 reinforcing steel 62 structure plans sheets, 100 log of test borings SAS E2/T1 Structures 04-0120E4
Gross Quantities 8000 cubic meter structural concrete 42,600,000 kg structural steel (corrected Nov 25, 2002) 1,349,000 kg bar reinforcing steel 600 structural plans sheets SAS Superstructure 04-0120F4
Gross Quantities 54,700 cubic meter structural concrete 9,800,000 kg bar reinforcing steel 250 plans sheets YBI Superstructures 04-0120H4
Gross Quantities 14,500 cubic meter structural concrete 3,400,000 bar reinforcing steel kg 300 + plans sheets Oakland Touchdown 04-012044
exceed goals participate and document Outreach to inform the contracting community which includes primes, subcontractors, suppliers and business enterprises on Construction Contract out to bid Jan 7, 2003 5:30 p.m. at District 4 and Jan 8, 2003 12:30 pm in South San Francisco Business Enterprise
San Francisco-Oakland Bay BridgeEast Span Seismic Safety Project
presented by Brian Maroney May 13, 2002 Constructability Workshop November 20, 2002 is last workshop before SAS Superstructure advertises Technical Issues/Changes since May 13, 2002
mobilization bonding * wire * welding * certification Buy America* May 13, 2002 • temporary ramp on YBI • Domestic Fabrication of SAS box and tower • tower erection • Jones Act • schedule *
Caltrans recognizes significant front end mobilization cost for complex marine projects Amend Section10264 of Public Contract Code, Add Section 284 to the Streets and Highway Code, relating to public works Chaptered September 27, 2002 over water and over $25 million Mobilization Payments
specification prepared and to be inserted into 04-0120F4 and 04-0120E4 Public Contract Code language in handout Mobilization Payments
Caltrans recognizes that for very large projects the current bonding market has constraints Proposed legislation to reduce payment bond from 100% to 50%, possible bonding cap pursuing every opportunity Bonding
ongoing Welding/Tolerance
Caltrans recognizes importance of early approval currently developing specification language for partial payment for early approvals of Fabricator Shop Audits see handout, very very draft Steel Fabricator Certification
main cable wire supplier can this project be fabricated domestically allow “alternative bid” process for Buy America, foreign source total bid (foreign steel) bid lower by 25% domestic total bid (domestic steel) bid temporary works Buy America
PPWS Strand (includes production of wire rod) Tower Saddle (single cast upper portion of 175 tons) S-Wire cable wrapping Macalloy bars - 75 mm dia high strength A722 bars ( w2, bent and hinge) Buy America Waivers
Two bolted splices added to tower from survey of US cranes Regions of allowable welded field splices identified on the plans Tower Erection
we want to minimize field splices low bidder discretion allowed SAS Box Superstructure field splices
Cert. Shop drawing review/approval begin fabrication cable erection Schedule
considering milestone payment for shop drawing approval exploring ways to expedite Caltrans processes CT engineer in contractor’s engr. Office to work together Shop drawing review
staged processing at Caltrans streamlining Caltrans decision-making process re shop drawing technical decisions Campus approach of CT office next to contractor’s office encourage partnership between Caltrans and Contractor Early meeting Shop drawing review
Macalloy bars - 75 mm dia high strength A722 bars Swivel joint seal assembly Epoxy Asphalt Concrete (deck surface riding on steel box) Tower Saddle (single cast upper portion of 175 tons) S-Wire cable wrapping Suspension cable paint system (noxide paint) Sole Source Items
distribution of cash flow over life of project if in United States see handout Payments for materials on site
reduce risk to contractor in case of earthquake, new limit is 5% contract amount, cap at $20 million What if seismic event during construction?
terrorism bidder inquiry see handout Bidders not liable for terrorism
modified the TRO spec to provide for a max of 15% ( bid amount divide by number of working days bid) for progress payment purposes in lieu of standard 20%, see handout Caltrans will work with contractor on electronic submittal stipend to do engineering during bid Under Development
thermal control plan adds flexibility ACI methods were created for very very large elements Mass Concrete
Mixed message for industry Some want in on design of detour Others will not perform design South - South Detour
well over 100 million discretize to ? west bound and east bound contracts west bound east bound frame (in water) ******* Oakland Touchdown