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Premium member Presentation Transcript Slide1: San Francisco-Oakland Bay Bridge East Span Seismic Safety Project In Bay Foundation/SAS Superstructure Constructability Workshop Nov. 20, 2002In Bay Foundation/SAS Superstructure Constructability Workshop : In Bay Foundation/SAS Superstructure Constructability Workshop November 20, 2002Holiday Inn Bay Bridge1800 Powell StreetEmeryville, California: November 20, 2002 Holiday Inn Bay Bridge 1800 Powell Street Emeryville, 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 : 9:00 Welcome 9:05 Opening Remarks 9:15 Where we are now 9:30 Business Enterprise Outreach 9:45-10:30 Technical Issues/Changes since May 13, 2002 1030-1045 Break 10:45-1:00 Open discussion with contractors regarding above mentioned issues Who are we?: Who are we? SFOBB Project Manager Heavy Civil Construction Contractors Fabricators, SuppliersWhy are we here?: Why are we here? 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 million over water Tools: Tools PowerPoint Meeting notes HandoutsGround Rules: Ground Rules 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 respectWhat can we accomplish: What can we accomplish understand changes made to Construction Contract since May 13, 2002 meeting understand Contractor Constructability concerns with In Bay Foundation and SAS Superstructure ContractsOther Introductions: Other Introductions Brian Maroney - Project Manager Mike Halverson and Rob Kobal : note takers Bill Zanetich - Duty Senior Design TeamBid Schedule: Bid Schedule Slide12: Project LimitsSlide13: YBI SAS SKYWAY OAKLAND TOUCHDOWN Existing Bridge SAS/YBI Discretization: SAS/YBI Discretization Smaller contracts that focus specific types of construction work create more opportunities for DBE and small business participationSlide15: Yerba Buena Island T1/E2 foundations (04-0120E4) T1 E2 W2 foundation (04-0120C4) Building demolition (04A1701) YBI/SAS Contracts Transition structure (04-0120H4) SAS superstructure (04-0120F4) Retrofit/Substation (04-0120G4) Slide16: San Francisco-Oakland Bay Bridge East Span Seismic Safety ProjectW2 Structures 04-0120C4: W2 Structures 04-0120C4 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 YBI Substation & Retrofit 04-0120G4: YBI Substation & Retrofit 04-0120G4 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 SAS E2/T1 Structures 04-0120E4: SAS E2/T1 Structures 04-0120E4 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 Superstructure 04-0120F4: SAS Superstructure 04-0120F4 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 YBI Superstructures 04-0120H4: YBI Superstructures 04-0120H4 Gross Quantities 54,700 cubic meter structural concrete 9,800,000 kg bar reinforcing steel 250 plans sheets Oakland Touchdown 04-012044: Oakland Touchdown 04-012044 Gross Quantities 14,500 cubic meter structural concrete 3,400,000 bar reinforcing steel kg 300 + plans sheetsBusiness Enterprise: Business Enterprise 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 FranciscoSlide24: San Francisco-Oakland Bay Bridge East Span Seismic Safety Project Technical Issues/Changes since May 13, 2002 : Technical Issues/Changes since May 13, 2002 presented by Brian Maroney May 13, 2002 Constructability Workshop November 20, 2002 is last workshop before SAS Superstructure advertises May 13, 2002: May 13, 2002 mobilization bonding * wire * welding * certification Buy America* temporary ramp on YBI Domestic Fabrication of SAS box and tower tower erection Jones Act schedule * Mobilization Payments: Mobilization Payments 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: Mobilization Payments specification prepared and to be inserted into 04-0120F4 and 04-0120E4 Public Contract Code language in handoutBonding : Bonding 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 opportunityWire : Wire waiver from buy AmericaWelding/Tolerance: Welding/Tolerance ongoing Steel Fabricator Certification: Steel Fabricator Certification 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 Buy America : Buy America 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 Waivers : Buy America Waivers 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) Jones Act 46 U.S.C. App Section 883 : Jones Act 46 U.S.C. App Section 883 see handout issue - foreign crane, domestic barge coastwise trade violation holding - not - provided barge meets issue - foreign crane, foreign barge coastwise trade violation holding - is a useTemporary Structures on YBI : Temporary Structures on YBI Domestic fabrication of tower and box : Domestic fabrication of tower and box Tower Erection : Tower Erection Two bolted splices added to tower from survey of US cranes Regions of allowable welded field splices identified on the plans SAS Box Superstructure field splices : SAS Box Superstructure field splices we want to minimize field splices low bidder discretion allowed Schedule: Schedule Cert. Shop drawing review/approval begin fabrication cable erection Shop drawing review : Shop drawing review considering milestone payment for shop drawing approval exploring ways to expedite Caltrans processes CT engineer in contractor’s engr. Office to work togetherShop drawing review : 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 Sole Source Items : Sole Source Items 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) Payments for materials on site: Payments for materials on site distribution of cash flow over life of project if in United States see handout What if seismic event during construction?: What if seismic event during construction? reduce risk to contractor in case of earthquake, new limit is 5% contract amount, cap at $20 million Bidders not liable for terrorism: Bidders not liable for terrorism terrorism bidder inquiry see handout Under Development: Under Development 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 bidMass Concrete : Mass Concrete thermal control plan adds flexibility ACI methods were created for very very large elements South - South Detour: South - South Detour Mixed message for industry Some want in on design of detour Others will not perform designOakland Touchdown: Oakland Touchdown well over 100 million discretize to ? west bound and east bound contracts west bound east bound frame (in water) *******Other Issues: Other Issues s-wrap desired because of maintenance appeal locks out moisture it’s a better surface for painting PPWS goes up faster, less air, less water, less splices Caltrans is anxious to hear any aerial spun cable option - Contractors must show reasonable support on anchorage strand jacks, space issue space is an issue: space is an issue Open Discussion with Contractors: Open Discussion with Contractors 10:45am – 1:00pm your chance to express concerns over what you’ve learned today your chance to let us know what your questions areWhat do contractors think: What do contractors think schedule Interface with adjacent projects Construction oversight from a distance weather days submittal fabrication overlap Environmental protections shop certificationWhat do contractors think : What do contractors think Business Enterprise Is bonding a no bid item? Shop drawing review Number of bidders Are there any Constructability issues?: Are there any Constructability issues? Erection sequence Tolerance welding Buildability You do not have the permission to view this presentation. In order to view it, please contact the author of the presentation.