2011 Southwest Region Construction Conference

2015 Southwest Region Construction ConferenceWisDOT - Bureau of Structures

Matthew Coupar

Introduction1Contact BOS When & Why?Anything structural change in loading, structural capacity, pile locations

If in doubt, call us! See Structures Contacts Handout BOS Contacts.doc

Remind Contractor to go thru Construction Staff for answers

2Sign/Signal StructuresOverhead sign supports, sign bridges, traffic signal monotubes, high mast light poles

New specifications are in affect this construction season

Contractors should contact project personnel prior to installing these structuresIt is WisDOTs responsibility to provide Quality Assurance (not Quality Control) for installationField engineers should receive DT 2322 and DT 2321 forms from the contractor and provide them to the in-service inspectors for inclusion in initial inspection report (uploaded into HSIS)

Bolt suppliers paperwork should include rotational capacity test information (high-strength bolt connections)

Contractors shall perform preinstallation test and install high-strength bolts/DTIs and anchor bolts per Form DT 2322 and DT 2321 respectively3Sign/Signal Structures ContdField engineers should schedule an in service initial inspection prior to opening to traffic with the Region bridge maintenance ancillary inspector

Common construction issuesFoundations Poor soils, groundwater, etc.Shafts should be augured not excavated, backfilling is not acceptable, sonotube forms shall not be usedSteel casings shall be installed in difficult locations and pulled as the concrete is being tremiedWith the approval of BOS, corrugated steel casings may be screwed in and left in place at the expense of the contractorNew installation procedures

New install procedures= high strength bolt requirements, bolt tensioning using DTIsAllow structure install after concrete attains 3500 psi or 7 equivalent days4Sign/Signal Structures ContdContacts:Traffic Signal Structures and FoundationsAlex Crabtree (BOS) 608.266.3686Sign StructuresVu Thao (BOS) 608.267.2869New Installation ProceduresDave Genson (BOS) 608.266.3722Mike Wood (BOS) 608.358.86545CMM Updates(Structures Related)CMM 1-65Updated engineer responsibilities related to as-built structure plans (require STRUCTURE to be placed above as-built title box on title sheet)

CMM 5-70Guidance and checklist for field personnel inspecting ancillary structures installations (mainly pertain to new sign/signal structures installation requirements)6Hot Weather ConcretingStd. Spec. 501.3.8.2 (FDM and CMM Guidance will be available in March 2015)

New PoliciesDual Approach to Ice Based on Project TypeProjects with HPC or greater than 2000 CY concrete STSP 501.1000.S shall be included in plans and bid by contractorsProjects with less than 2000 CY concrete Standard spec administrative item payment of $0.75/lb remains in affect

Ice should be paid for field engineers should not delay pours if ice is required

Ice delivered and stored on site should not be paid for unless used as required per Std. Spec.

7Standard Spec. UpdateMasonry Anchor Install 502.3.14.1Type L or S adhesive anchorACI/CRSI Certified Installer, orField Verification by Non-Destructive Pullout Testing

8STSP ChangesPigmented Protective Surface TreatmentUsed on parapets, different product than decks

Stainless Steel ReinforcementMoved into STSPs

Polymer Modified Asphalt (for Overlays)Moved into STSPs

9Removal Issues

Contractor should use right equipment and size for the job10

Good size of top flange gone from girder, looks piece is laying in river belowAvoid sawcutting over girder if possible11

12Joint Replacement

-We have had problems with contractors doing minimal removal for joint replacement-Provide 4 joint removal, emphasize importance of contractor to follow plans.13Erosion/Grading @ WingsPlan details for fill at wing tipsProper Fill = Minimize Future Erosion

The contractor should provide fill up to red line which is in line with plans.Stream Crossings-Installation issues-Mention riprap around abutments should be provided as shown on plans (thickness/location) cases where contractor just dumps it on top of ground and should toe in if called for. -verify that it meet the specification for size, if too small will wash away-make sure geotextile fabric is applied-All very important so abutments are protected from erosion14Pile Encased PierNo cofferdam required only forms

Tremie concrete well.15

Pile Encased Pier

Precast PiersBe plugged into fabrication of elementsTemplates to match at connectionsVerify dimensions for field installationGet BOS & Jim Parry involvedSuggest mock grout pour before the actualFollow grouted coupler instructions17

18Deck Rebar and Bar ChairsIssues with loose deck steel Bar chair spacing too largeBar tie spacing too large or missingSTD. Spec. 505.3.4 Placing and Fastening

Was raised by Joe Balice of FHWA19Deck Pour ChecksProbing during deck pour and dry runTop CoverBottom CoverDeck thickness

20Bridge ApproachesStructural Approach SlabsUS Highways & InterstatesDetails included in the structure planContractors have successfully poured with bridge deck

Reviewed last year

Now this is a standard for IHs and USHs

Explain parts of the Approach Slab point outFootingSlabZ-Bar attachment to superstructureConventional approach slab to be used based on FDM guidance

Pay attention to plan details - especially at the corners of the bridges and on bridges with skews

Point out location of special joint if contractor elects to pour with the deck.21Bridge Approaches ContinuedDetail for pouring SAS with bridge deckContractor would have to propose using this

Make it clear that this is an option if the contractor proposes to use it

Saves time because there is only 1 pour instead of 3 separate pours that all have there own cure times.

Point out parts and pieces of the joint/detail

Contact BOS if the contractor proposes to use this to get approval for the detail22

23Alternate Construction Joint

AbutmentPier CapDo not allow a sawcut in lieu of zinc/plastic strip24Alternate Construction Joint

Saw cutDO NOT ALLOWDo not allow a sawcut in lieu of zinc/plastic strip25Sawcut on Bridge Deck

Abutment Paving Block Joint

Sawcut on Bridge Deck

26Welding 101Welders must be qualified prior to welding in the position, process, and type of joint. Correct Certification.A written weld procedure for each type of weld is required.Get familiar with weld symbols and nomenclature.Storage and care of welding electrodes.A certification from Department of Public Safety & Professional Services is not applicable to transportation structures.27ConclusionCall us with QuestionsWe look forward to another great year of bridge construction! THANK YOU!

28Any Questions?

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