Revisions to Division 500 - Structures

Kathy Crowell

State Bridge Design Engineer

Michelle Mann

State Geotechnical Engineering

Shane Kuhlman

State Bridge Engineer

Sean Brady

State Concrete Engineer

Agenda

Introduction

Geotechnical

Concrete

Bridge

IntroductionIn general:

• References to “PM”• Reliance on Manufacturer’s

instructions• Submittals default to 30 Days

– some exceptions included• Warranty language removed

Introduction

See handout –

Summary Sheet

Revisions to Division 500 - Structures

Sections 501, 502, 504, 505, 506

Michelle Mann

Geotechnical Engineering and Exploration Section

Division 500 Specifications

2014 Specification 2019 Specification Modifications

501: Driven Bearing Piles 501: Driven Piles Minor Revisions

502: Drilled Shafts 502: Drilled Shafts Major Revisions

504: Load Testing of Bearing Piles 504: Load Testing of Bearing Piles Major Revisions Issued as a special provision since 2015

505: Pile Integrity Testing 505: Pile Integrity Testing Minor Revisions

506: Mechanically Stabilized Earth RetainingStructures

506: Mechanically Stabilized Earth RetainingStructures

Minor Revisions

Section 501: DRIVEN BEARING PILES

Changes to pre-driving submittals/ meeting process:

• Driven Pile Preconstruction Conference (501.2.2.4)

Deletions:

• Deleted discussion of steam and air pile hammers (501.3.2.1)

I-25 San Mateo exit- ABQ

Section 502: DRILLED SHAFTSGeotechnical Data Information

NM 550. Photo by Paul Watson

502.1.2 Geotechnical Data InformationProject Foundation and/or Geotechnical Reports includesubsurface conditions present at the time of field investigation.The Contractor shall use this information to anticipateconditions that include but are not limited to subsurface water,obstructions, soil stability, and presence of rock.

If Foundation and/or Geotechnical Report information isunavailable, the Contactor shall assume the CasingConstruction Method and/or the Slurry Displacement Methodreferenced in 502.3.4, “Construction Preparations.”

Section 502: DRILLED SHAFTS (cont.)Construction procedures:

• Added requirements for contractor to describe methods for:

• Dewatering shaft excavations

• Managing caving or unstable zones

(502.3.3.2)

• Obstructions (502.3.5.2.2, 502.4.3, 502.5.1):

• Reworded

• Clarified unanticipated obstruction removal

• Clarified acceptance for concrete strength (502.3.8.1):

• Placing loads on shaft prior to achieving 28 day compressive strength, in accordance with Section 510.3.5.2 “In Place Concrete Strength Measurements”

• Clarified that final acceptance of quality testing is by the Project Manager (502.3.5.1.1, 502.3.5.1.3.3, 502.3.5.2.4, 502.3.5.3)

Section 504: LOAD TESTING OF BEARING PILES

• A special provision for Section 504 has been in use since 2015

• Define responsibilities during Pile Dynamic testing:• Consultant testing vs. Department testing

• Included requirements for Consultant personnel/equipment

• Included requirements for WEAP (wave equation analysis) charts and reports of pile dynamic testing results

(504.1.1.1, 504.1.2.1, 504.3.1.1.5, 504.3.4.1, 504.3.4.1.3,

504.3.4.1.5, 504.3.4.3, 504.5)

• Clarified restrictions on driving production piles prior to receiving field acceptance criteria (504.3.4.1.1) I-25 Lemitar exit.

Photo by Paul Watson

Section 505: PILE INTEGRITY TESTING

• Method of Measurement of tests (505.4)

The department will measure

the actual number of pile tests

administered and approved.

NM 304

Section 506: Mechanically Stabilized Earth Retaining Structures

• Updated Table 506.2.12.2.1 Design Parameters to reflect AASHTO LRFD design requirements.

• Look for changes in the future to include a new Special Provision Section 506: Proprietary Earth Retaining Structures, • This will cover approved systems:

• Precast Gravity, Semi-gravity, Bin and Crib Retaining Walls Systems (Category A)

• Gravity Modular Block and Gravity Large Block Retaining Wall Systems (Category B)

• Mechanically Stabilized Earth (MSE) Retaining Wall Systems (Category C)• Approval of Wall systems per NMDOT Proprietary Earth Retaining (PER)

Systems, Evaluation and Approval Process

http://www.dot.state.nm.us/content/dam/nmdot/Proprietary_Earth_Retaining_Systems/Proprietary_Earth_Retaining_(PER)_Systems_Evaluation_and_Approval_Process.pdf

Questions?

Contact information:

• E-mail: Michelle.Mann@state.nm.us

• Mobile: 505-490-1507

mailto:Michelle.Mann@state.nm.us

Revisions to Division 500 - Structures

Kathy Crowell

Bridge Bureau

Design Section

Sections 511, 520, 533, 541, 544, 545, 546, 548, 565 +

Section 511: Concrete Structures

•Materials Updated to include many more materials

•Updates to Cold and Hot Weather Concrete Plans

•Class 4, Special Surface Finish – cross reference 548

•Curing – updates to clarify

•Work included in payment updated

Section 511: Concrete Structures (Materials)

Bonding AgentForm Release AgentLiquid Applied Evaporation ReducersExtruded PolystyreneTear–Web WaterstopMembrane WaterproofingFluid-Applied WaterproofingSwellable Hydrophilic Waterstop

Section 511: Concrete Structures (Hot Weather Concrete)

511.3.4.2 - Hot Weather ConcreteReworked to provide equivalent

content to the Cold Weather Section.

1. The requirement to provide a “Hot weather concrete and curing plan” has been added – roughly equivalent to the cold weather plan.

2. As part of Hot Weather planning, “liquid-applied evaporation reducer” has been added as an optional method for managing evaporation (511.3.4.2).

Section 511: Concrete Structures (Hot Weather Concrete)

511.3.4.2 - Hot Weather Concrete

The updates to the Hot Weather Concrete clarify the Contractor’s responsibility in determining the means and methods of controlling evaporation – in so doing, the spec currently treats all measures as part of means and methods and does not pay extra for wind breaks and fogging systems.

Section 511: Concrete Structures511.5.1 Work Included in Payment

• The following Work and items will be considered as included in the payment for the main item(s) and will not be measured or paid for separately:

• Waterstops and flashings;• Waterproofing;• Premolded and preformed joint fillers;• Concrete required to fill overbreakage in excavation when footings or walls are

cast against vertical or horizontal faces of excavation;• Installation of drains and weep holes;• Extruded polystyrene;• Means and methods associated with placement of concrete in hot and cold

weather conditions, including but not limited to wind break, fogging systems, and temporary heat.

Section 511: Concrete Structures

• Temporary Works and Falsework

• shall perform in accordance with the current edition of the AASHTO Design Specifications for Bridge Temporary Works and the AASHTO Construction Handbook for Bridge Temporary Works.

• Also true for 512 and 529

Section 520 – Post-Tensioned Concrete Bridge Members

• Has been covered in recent times by Project Specific Special Provisions

Section 533 – Concrete Structure Repair

Materials Specification Updates to account for pre-packaged materials.

Better format (bullets)

New Standard Drawing issued

533-01

Special Provision 533 F – Galvanic Anodes

New Standard Drawing issued

533-02

When you have 533, you should usually have 533-F, it is best practice

Section 541 – Steel Structures

Tiered approach to fabrication and inspection

Tier 1 – out-of-state BIG steel

Tier 2 – bridge barrier rails

Tier 3 – everything else

Galvanizing Specification – including touchup

Section 544, 545, 546 – Steel Coatings

544 – BIG Steel545 – Miscellaneous Steel546 – Recoating Steel

What are the notable changes?NEPCOAT is no longer the material spec545 has a new selection spreadsheet545 has a powdercoating material specRenewed focus on Surface Prep

546 has SSPC descriptionsAll PMs/Inspectors should have SSPC-VIS 3 Guide

Updated Contractor Qualifications

Section 548 – Coating of Concrete

*Colored Concrete must include Special Provision

*

Success is totally dependent upon correct surface preparation.

Section 565 – Preformed Silicone-Coated Foam Joint System

What Else?

Special Provisions of Note:

533-B – Galvanic Anodes

511-F – Precast Concrete Box Culverts

512A – Rapid Set Concrete

512? – Small Batch Rapid Set Concrete

570-B – Slip-Lining

Standard Drawings of Note:

533-01 - Concrete Patch & Repair533-02 - Galvanic Anodes511 – Part 1 Refresh

Bridge Number PlatesBarrier refresh (MASH)

701-01 - Overhead Sign Structures707L-07 - Light Support Standards

Questions?

Contact information:

• E-mail: kathy.crowell@state.nm.us

• Mobile: 505-470-5663