San%20Francisco-Oakland%20Bay%20Bridge%20East%20Span%20Seismic%20Safety%20Project

1
San Francisco-Oakland Bay BridgeEast Span
Seismic Safety Project In Bay Foundation/SAS
Superstructure Constructability Workshop Nov. 20,
2002
2
In Bay Foundation/SAS Superstructure
Constructability Workshop
3
November 20, 2002Holiday Inn Bay Bridge1800
Powell StreetEmeryville, California
4
900 Welcome905 Opening Remarks915
Where we are now930 Business Enterprise
Outreach945-1030 Technical Issues/Changes
since May 13, 20021030-1045
Break1045-100 Open discussion with
contractors regarding above mentioned
issues
5
Who are we?

• SFOBB Project Manager
• Heavy Civil Construction Contractors
• Fabricators, Suppliers

6
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

7
Tools

• PowerPoint
• Meeting notes
• Handouts

8
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 respect

9
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
  Contracts

10
Other Introductions

• Brian Maroney - Project Manager
• Mike Halverson and Rob Kobal note takers
• Bill Zanetich - Duty Senior
• Design Team

11
Bid Schedule
12
Project Limits
13

OAKLAND TOUCHDOWN
SKYWAY
YBI
SAS
Existing Bridge
14
SAS/YBI Discretization

• Smaller contracts that focus specific types of
  construction work create more opportunities for
  DBE and small business participation

15
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
16
San Francisco-Oakland Bay BridgeEast Span
Seismic Safety Project
17
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

18
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

19
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

20
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

21
YBI Superstructures 04-0120H4

• Gross Quantities
• 54,700 cubic meter structural concrete
• 9,800,000 kg bar reinforcing steel
• 250 plans sheets

22
Oakland Touchdown 04-012044

• Gross Quantities
• 14,500 cubic meter structural concrete
• 3,400,000 bar reinforcing steel kg
• 300 plans sheets

23
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 530 p.m. at District 4 and Jan 8,
  2003 1230 pm in South San Francisco

24
San Francisco-Oakland Bay BridgeEast Span
Seismic Safety Project
25
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

26
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

27
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

28
Mobilization Payments

• specification prepared and to be inserted into
  04-0120F4 and 04-0120E4
• Public Contract Code language in handout

29
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 opportunity

30
Wire

• waiver from buy America

31
Welding/Tolerance

• ongoing

32
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

33
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

34
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)

35
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 use

36
Temporary Structures on YBI
37
Domestic fabrication of tower and box
38
Tower Erection

• Two bolted splices added to tower
• from survey of US cranes
• Regions of allowable welded field splices
  identified on the plans

39
SAS Box Superstructure field splices

• we want to minimize field splices
• low bidder discretion allowed

40
Schedule

• Cert.
• Shop drawing review/approval
• begin fabrication
• cable erection

41
Shop drawing review

• considering milestone payment for shop drawing
  approval
• exploring ways to expedite Caltrans processes
• CT engineer in contractors engr. Office to work
  together

42
Shop drawing review

• staged processing at Caltrans
• streamlining Caltrans decision-making process re
  shop drawing technical decisions
• Campus approach of CT office next to contractors
  office
• encourage partnership between Caltrans and
  Contractor
• Early meeting

43
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)

44
Payments for materials on site

• distribution of cash flow over life of project
• if in United States
• see handout

45
What if seismic event during construction?

• reduce risk to contractor in case of earthquake,
  new limit is 5 contract amount, cap at 20
  million

46
Bidders not liable for terrorism

• terrorism bidder inquiry
• see handout

47
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 bid

48
Mass Concrete

• thermal control plan adds flexibility
• ACI methods were created for very very large
  elements

49
South - South Detour

• Mixed message for industry
• Some want in on design of detour
• Others will not perform design

50
Oakland Touchdown

• well over 100 million
• discretize to ?
• west bound and east bound contracts
• west bound east bound frame (in water)

51
(No Transcript)
52
Other Issues

• s-wrap desired because of maintenance appeal
• locks out moistureits 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
  supporton anchorage strand jacks, space issue

53
space is an issue
54
Open Discussion with Contractors

• 1045am 100pm
• your chance to express concerns over what youve
  learned today
• your chance to let us know what your questions are

55
What do contractors think

• schedule
• Interface with adjacent projects
• Construction oversight from a distance
• weather days
• submittal fabrication overlap
• Environmental protections
• shop certification

56
What do contractors think

• Business Enterprise
• Is bonding a no bid item?
• Shop drawing review
• Number of bidders

57
Are there any Constructability issues?

• Erection sequence
• Tolerance welding
• Buildability