www.transportation.ohio.gov john r. kasich, governorjerry wray, director ohio department of...
TRANSCRIPT
www.transportation.ohio.gov
John R. Kasich, Governor
Jerry Wray, Director
Ohio Department of Transportation
2011 Conaway ConferenceStructures Update
Deck Placement Control ElevationsJuly 2008 BDM Changes - Plans
provide:•Screed Elevations (to set finished surface)
– Curblines (barrier) or Deck edges – Profile grade lines (not over beams)– Transverse grade-break lines– Phased construction lines
•Top of Haunch Elevations– Centerline of each girder (to set forms)
•Final Deck Surface Elevations22011 Conaway Conference
Deck Placement Control Elevations• SCREED ELEVATIONS represent the
theoretical deck surface location prior to deflections caused by deck placement and other anticipated dead loads.
• TOP OF HAUNCH ELEVATIONS represent the theoretical location of the bottom of the deck above the beam/girder haunch prior to deflections caused by deck placement and other anticipated dead loads.
• Haunch Fills = Top of Haunch Elev. – Surveyed Beam Elev.
32011 Conaway Conference
Deck Placement Control Elevations
• FINAL DECK SURFACE ELEVATIONS shown represent the deck surface location after all anticipated dead load deflections have occurred.
DIFFERENTIAL DEFLECTIONThe primary reason for eliminating
screed elevations from above each beam/girder line was differential deflection between beam/girders
42011 Conaway Conference
Deck Placement Control Elevations
52011 Conaway Conference
Deck Placement Control Elevations
Causes of Differential DeflectionVariations in one of the following three variables will affect the amount of beam/girder deflection that occurs due to the wet weight of concrete at each screed cross-section:
– Span length of each beam/girders.– Magnitude of concrete load applied to
each beam/girder.– Size of each beam/girder cross-section.
62011 Conaway Conference
PN 525 Steel Price Adjustment
Changes in 7/17/2009 from 8/2/2004 Version
- Eliminated Cost Basis(Index) - Changed indices for Structural Steel Members,
Levels UF, 1, 2, and 3 and Steel H-Piling (with average of lowest and highest 27” to 36” tall, 10” -12” wide flange beams up to 256 lbs./ft. from Nucor-Yamato, SDI, and Gerdau-Ameristeel
- Total steel price adjustment (SPA) would not be computed unless the percent (%) change was 10% or more, (had been 5% change).
- Put into four categories
72011 Conaway Conference
PN 525 Steel Price Adjustment 1/15/2010 and 4/16/2010 Versions
Simplified to just two categories Category 1: Structural Steel Members, Levels UF
1,2 &3 and Steel H-Piling– Based on average of lowest & highest 27” to 36” tall wide
flange beams from 3 suppliers
Category 2: Structural Steel Members, Levels 4,5 &6 and Stay-in-Place casing
- Based on AMM Steel Plate indices Guardrail, traffic & light poles, corrugated metalpipe, expansion joints, bearings, pre-stressed andpost tensioning strand & reinforcing steel eliminated
82011 Conaway Conference
PN 525 Steel Price Adjustment
1/15/2010 and 4/16/2010 VersionsWill have new calculator available for new Steel
Price Adjustment Proposal Note versions.
Just need Project number,County, Route & Section,Project letting date,Completion date,Reference Number,Date Shipped from Mill,Pounds of Steel shipped
92011 Conaway Conference
Sealing of Concrete Surfaces• Measure sealing of concrete
surfaces by the number of square yards of coated area projected to a 2-dimensional surface
• Documentation – New CA-S-21 Form• New Work Type 57 for Sealing of
Concrete Surfaces • Contractors should have had
training• Came up with new pay item for
Removal of Existing Coating (S.Y.)• Remove existing coatings completely• Ensure that all wastes generated by
surface preparation operation are managed to prevent discharge
102011 Conaway Conference
514 Structural Steel Painting
Duties of the QCS:1. Inspect equipment and abrasive at specified intervals
2. Approve the work and provide documentation that the work has been approved immediately before the QCP
3. Inspect the work with the Engineer or his representative at all QCP.
4. Verify the Contractor or fabricator performed work according to the work requirements.
5. Cooperate with the inspection and testing performed by the Engineer and inspector.
6. Document test results and compare test results with the inspector’s test results.
7. Notify the foreman of nonconforming work.
8. Stop work when test equipment is not available and when necessary to ensure the work is performed according to the Contract.
112011 Conaway Conference
514 Structural Steel Painting
• Quality Control Points (QCP):• QCPs are points in time when one
phase of the work is complete and approved by the quality control specialist and ready for inspection by the Engineer before continuing with the next phase of work.
122011 Conaway Conference
514 Structural Steel Painting
• At a QCP, the quality control specialist or fabricator shall provide quality control tests bearing their signature to the Engineer.(CA-S-7 QCS Inspection Documentation Form)
• The Contractor or fabricator shall provide the Engineer and inspectors access to inspect all affected surfaces.
• If inspection identifies a deficiency, correct the deficiency according to the Contract Documents before starting the next phase of work.
132011 Conaway Conference
514 Structural Steel Painting
14
At each Quality Control Point, the QCS must inspect, then sign this form stating that the work is in complete compliance and ready for inspection by the owner’s inspector.2011 Conaway Conference
514 Structural Steel Painting
• Owner’s Inspector’s Duties• Under Documentation Requirements- 514 Field
Painting of Structural Steel from 2009 Construction Inspection Manual of Procedures, the inspector is required to:
1. Document Dry Film Thickness readings on Form CA-S-2 2. Ensure that the QCS fills out and signs the CA-S-7
Form prior to all Quality Control Point Inspections3. Document the QCS’s information and Job Site Visual
Standards on Form CA-S-114. Document Solvent Cleaning(QCP#1) and Grinding of
Flange Edges (QCP#2) on Form CA-S-125. Document Abrasive Blasting (QCP#3) on Form CA-S-13
152011 Conaway Conference
514 Structural Steel Painting• Owner’s Inspector’s Duties
6. Document Waste Disposal (QCP#4) on Form CA-S-147. Document Prime Coat Application (QCP#5) on Forms
CA-S-15 and CA-S-28. Document Grinding Fins, Tears, and Slivers (QCP#6)
and Caulking (QCP#9) on From CA-S-169. Document Intermediate Coat Application (QCP#8) and
Finish Coat Application (QCP#10) on Forms CA-S-17 and CA-S-2
10.Document the Final Destructive Tests on Form CA-S-1811.Document the Final Review (QCP#11) on Form CA-S-19The owner’s inspector needs to make independent
checks of the QCS’s readings and results.
162011 Conaway Conference