2014 Carolinas AGC Conference Highway Division

Structures Breakout

Kevin G. Bowen, PE

Construction Unit

July 31, 2014

Joint Committees

• There are Four Committees – • NCDOT/CAGC Joint Cooperative Committee

• NCDOT/CAGC Joint Roadway Committee

• NCDOT/CAGC Joint Structure Committee

• NCDOT/CAGC/ACEC Design Build Committee

• Forum for Sharing Ideas and Discussing

Issues Affecting the Industry

• Meeting minutes can be found on

• http://www.ncdot.gov/business/committees/

NCDOT/CAGC Joint Structure Committee

Adam Holcombe Dane Construction

Ben Bishop Crowder Construction

Chris Britton Buckeye Construction

Chris Powers Lee Construction

Dan Nickel Carolina Bridge

Damien Hollifield Young & McQueen

Don Tutterow The Hurley Group

Erick Frazier S.T. Wooten Corp.

Bill Heston Balfour Beatty Infrastructure

Larry Cagle APAC

Lee Bradley Blythe Construction

Michael Moore Palmetto

Phillip Creasman NHM Constructors

Randall Gattis Sanford Contractors

Troy Carter Lane Construction

NCDOT Leads: Greg Perfetti – State Structures Engineer

Kevin Bowen – State Bridge Construction Engineer

Discussion Topics Funding – Upcoming Projects

TIP

Design Build

Express Design Build

17BP Funds

Preservation

2013 Weather

Box Beam / Cored Slab Lift Off after Post Tensioning

Wall Payment Upcoming Policy Changes

Segmental Retaining Wall (SRW) Upcoming Policy Changes

Fly Ash Supply Issues

Concrete Slurry Disposal Update

Buy America Policy and Tracking Form

Bridge Aesthetics – Recent Efforts

12 Month Letting Projection, July 2014 thru June 2015 – Amount ($M)

12 Month Letting Projection, July 2014 thru June 2015 – Number of Projects

Scheduled Lettings for SFY 2015:

• Low Impact Bridge Replacements (BD projects): 38

bridges

• 17BP State Funded Bridge Replacements: 184

bridges*

• TIP Bridge Replacements (B projects): 53 bridges

• Express Design Build Projects (17BP): 63 bridges

*‘Year 4’ (SFY 2015) 17BP funds are not yet approved by the legislature. Expect between $153M to $162M in 17BP funds. *Divisions are evaluating how much money they may get and estimating what they can let next year; therefore, not all of the 184 17BP bridge replacements will be let.

18 Month Letting Projection, July 2014 thru December 2015 – Amount ($M)

18 Month Letting Projection, July 2014 thru December 2015 – Number of Projects

24 Month Letting Projection, July 2014 thru June 2016 – Amount ($M)

24 Month Letting Projection, July 2014 thru June 2016 – Number of Projects

Year 4 - Express DB Breakdown

(7 Contracts):

• Division 13, 17BP.13.R.151, 11 bridges, July 2014 Let

• Division 14, 17BP.14.R.129, 6 bridges, July 2014 Let

• Division 7, 9 bridges*

• Division 7, 8 bridges*

• Division 11, 9 bridges*

• Division 11, 12 bridges*

• Division 6, 6 bridges*

* WBS # and let dates not assigned yet. Lettings Feb - June 2015.

Low Impact and 17BP Expenditure Updates:

• We will exceed our goal of spending $228M for Low

Impact (BD projects) by the end of October 1, 2015

• $220M has been expended or committed to contracts.

• We exceeded our year 3 17BP goal of committing

$628M by July 1, 2014.

• $646M has been expended or committed to contracts.

2013 Weather Memo Summary: Record rainfall in 2013. Administrative decision was made to make an

exception to 108-10(B)3 of 2012 Standard Specifications.

Contracts that cover multiple construction

seasons which include all or part of 2013, evaluate 40% on 2013 contract time exclusive of remaining contract time.

Remaining contract time before and after 2013 will be considered as a whole and evaluated for 40%, if applicable.

Contractor must have pursued work and must have been controlling.

2013 Weather Analysis

2013 Weather Analysis

Box Beam / Cored Slab Lift-Off after PT

Potential Causes of BB/CS Lift-Off

• Beam or slab sides not plumb, tapered inward

from bottom to top

• Caps not level

• Dowel or dowel sleeve locations off

Potential Solutions for BB/CS Lift-Off

• Producer corrections: plumb sides, dowel

sleeves plumb and correct location

• Construct level caps, correct dowel locations

• Dowel installation after setting slabs

• Partial tension, grout exterior shear key,

complete tensioning

• Threaded anchor bolt, washer and nut hold

down for exterior beam

Walls – Measurement and Payment Policy Change

Walls – Measurement and Payment Policy Change

CURRENT MEASUREMENT AND PAYMENT

• MSE Retaining Walls will be measured and paid in square feet. MSE walls will be measured as the square feet of exposed wall face area with the height equal to the difference between top and bottom of wall elevations. Define “top of wall” as top of coping or top of panels or SRW units for MSE walls without coping. Define “bottom of wall” as shown in the plans and no measurement will be made for portions of MSE walls embedded below bottom of wall elevations.

PROPOSED MEASUREMENT AND PAYMENT

• MSE walls will be measured and paid as the square feet of wall face area that is constructed above the footing. This measurement is inclusive of areas of the MSE wall that are to be embedded.

Segmental Retaining Wall (SRW) - Policy Change

Segmental Retaining Wall (SRW) -

Policy Change

• Met with Carolinas Concrete Masonry

Association (CCMA) representatives in

December 2013 to discuss potential expansion

of our current SRW allowances.

• Researched internally, considered options and

determined potential cost savings.

• Met again on July 24, 2014 to finalize details on

an expansion of our policy in the use of SRW

blocks.

Segmental Retaining Wall (SRW) -

Policy Change Proposed Allowances for MSE walls:

• More critical walls on Subregional and Regional Tier with 5000 ADT limit

and possibly some other restrictions.

• Potentially on RR projects outside RR R/W.

Restrictions:

• Not on Statewide Tier

• No MSE walls in scour conditions

• No SRW’s on bridge abutments where the wall alignment has inside angle

turns <135 degrees

Default Spec:

• Will likely specify Panels and Stone

• Plan notes will identify fine aggregate and SRW allowances

Reminder:

• Flat face blocks are required by the spec.

Fly Ash – Supply Issues, Impacts Eric Misenheimer – Chandler Concrete Company, Inc. Ready Mix Producers.

• Contractor complaints:

• Pick an ash source and stay with it.

• Why don’t you just leave it the way it was submitted?

• I have approved mixes, why do I need to submit these?

• Source changes are based on week-to-week information received from fly ash

suppliers. Sometimes it is day-to-day.

• Not changing sources to lower costs or for any other reason than to be able to

provide concrete with the materials that are available.

• The use of straight Portland cement mix designs is not really an option in many

circumstances,

• Cement is considerably more expensive than fly ash.

• Standard Specifications and Project Special Provisions require fly ash as part of

our Corrosion Policy (Bridge decks in Div. 5, 7 and 9 through 14, coastal

requirements).

• Fly Ash or Slag are required as mitigating agents for ASR quarries. Slag is not

readily available.

Fly Ash – Supply Issues, Impacts Good communication is needed between Supplier/Contractor/NCDOT (Construction and

M&T) to minimize any impacts on construction projects.

Materials and Tests:

• M&T to look into approval of fly ash supplier, rather than particular source.

Contractors:

• Prompt submittals of request forms.

Suppliers:

• Submit mix designs as needed rather than multiple mix versions all at once.

• Submit only the classes of concrete that are needed.

NCDOT Construction:

• RE staff should check HiCams more frequently for the latest approved mix

designs. Ipads should help with this as inspectors will have access to HiCams in

the field.

Concrete Slurry Disposal Update 2012 Standard Specifications - Bridge Deck

Grooving Slurry

• Article 420-14(B) Continuously remove all

slurry or other residue resulting from the

grooving operation from the bridge deck by

vacuum pick-up or other approved methods.

Prevent slurry from flowing into deck drains

or onto the ground or body of water under the

bridge. Dispose of all residue off the project.

Statewide Permit -

Land Applied Diamond

Grinding Slurry and

Hydrodemolition

Operation Slurry

- May also cover

Bridge Deck

Grooving Slurry

Concrete Slurry Disposal

Buy America -

In an effort to standardize interpretation of Federal and State laws that require use of domestic steel and iron products on all projects, a spreadsheet was developed to document the process. Use of the attached spreadsheet for each project requesting use of non-domestic steel and iron products will aid in verifying that the minimal use allowance is not exceeded, and documents amounts deemed to be exempt from inclusion in the minimal use allowance. Enter general information at the top of the form to identify the project, along with the Contract Bid Amount. This establishes the Minimal Use Amount allowable. Enter the Line Item Number and Description for each item that the contractor requests using non-domestic materials Enter the amount shown on invoices provided by the Contractor or Sub-contractor for the material. Contact Jack Cowsert (jcowsert@ncdot.gov – 919-329-4030) for interpretation of whether the amount must be considered under Minimal Use Amount or qualifies as an Exempt Amount. The spreadsheet maintains a cumulative total of amounts and verifies this against the allowable amount.

Buy America ExceptionsContract Number:

TIP Number:

Route:

County:

Project desctioption:

Resident Engineer:

Contractor:

Contract Bid Amount: 0 Allowable Amount: 2,500.00$ Cumulative Amount: -$

Line Item Number Line Item Description Invoice amount

Minimal Use

Amount Exempt Amount Cumulative Amount Comment

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

Bridge Aesthetics Update

Bridge Aesthetics Update

Bridge Aesthetics Update

Bridge Aesthetics Update