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WisDOT - Bureau of Structures Brandan Burger & Dave Kiekbusch Slide 2 Anything structural change in loading, structural capacity, pile locations If in doubt, call us! See Structures Contacts Handout Remind Contractor to go thru Construction Staff for answers Slide 3 Measure Twice Cut Once! Slide 4 Slide 5 Send electronic files via e-mail to: Craig Wehrle: Girders, rails, exp. joints, bearings, etc. Steel fabrication Who inspects?: BOS Structures Maintenance BOS hired Consultants Slide 6 Prestressed Concrete Girders Plant has one Quality Verification (QV) inspector Weekly approval @ plant - QV reports QV reports with girder acceptance recommendations are sent to region materials staff and forwarded to project personnel. Issues from the fabrication plant should NOT be re-visited at the job site. Final approval is made by project engineer at job site - any shipping or erection damage. Slide 7 Initial sweep is critical Fabricators responsibility Measured at the plant Long term sweep only a concern IF intermediate diaphragms dont fit. Slide 8 Mostly occurs w/ steel & wide flange (>4) prestressed girders Contractors responsibility Strapping top flanges & bracing bottom flanges NO welding to top flange of steel girders or prestressed girder rebar! Slide 9 Slide 10 Proper rebar clearance Release joint straps ASAP before set Slide 11 Anchorage for Steel Railings Hold anchor bolts up thread connection Slide 12 Plan details for fill at wing tips Proper Fill = Minimize Future Erosion Slide 13 What to look for: Materials Backfill Material, Compaction Reinforcement Strap Placement Panels Damage, Filter Fabric Construction Obstructions Drainage If designed and built correctly = Quality Product Slide 14 Slide 15 Slide 16 Overhead sign supports, sign bridges, traffic signal monotubes, high mast lighting poles Contractors responsibility Anchor bolt tensioning: DT2321 - each structure Submit to the engineer - permanent project records Engineers responsibility Contact region traffic or maintenance - set up inspection as soon as each structure is complete Slide 17 FOUNDATIONS: Too Low/Buried Removal of Excess Formwork Shaft/Bar Cage Not Plumb or Centered Missing Rodent Screen Slide 18 ANCHOR BOLTS: Use of Lock Washer Out of Plumb Leveling Nuts Improper Tensioning Slide 19 Bolted Connections: Missing Bolts on Truss Loose Bolts on Splice Prepped Splice Plates Slide 20 Bolted Connections: Faying Surface Gap Use of Lock Washer Incorrect Bolt Size/Length Slide 21 Sign Connections: Approved Hardware Oversized and slotted hole Over Tensioning Blank Signs and cover Slide 22 505.3.4 Placing and Fastening Plastic chairs support bottom mat of rebar Continuous chairs support top mat of rebar off bottom mat NOT ALLOWED individual plastic chairs to support top mat of rebar Reminder: Hardware incorporated in deck must be galvanized, epoxy coated, stainless steel, etc. Welding is not permitted on epoxy steel. Slide 23 Slide 24 Slide 25 New Section 550: similar to STSP used for the last few years. Modified Gates Required Driving Resistance Specification Covers: Steel, Cast in Place & Precast Concrete Piles Pile Points Providing test piles Driving piles Determining required driving resistance Preboring Pile redriving Slide 26 Weld splices conforming to the AWS D1.1/D1.1M Structural Welding Code-Steel. Slide 27 Contractor certifies the quality of field welds as follows: 1. Designate who inspects welding. Must be an AWS certified welding inspector (CWI) or a department-approved individual. 2. Evaluate field welding at suitable intervals. 3. Complete DT2320 for each structure 4. Submit form to the engineer - permanent project record. Slide 28 If piles drive longer than plan length, pay for field splice Current policy: Splices paid as equivalent to the contract price for: HP piles = 9 feet per pile spliced Other piles = 6 feet per pile spliced ONE payment per pile. Possible revision for 2014 Slide 29 Section 550.3.11.3 Painting: See the departments approved product list Paint Systems for Exposed Piling Slide 30 Inspect temporary structures before opening to traffic Conform to NBIS & departments structure inspection manual Guidance in CMM: Chapter 5 Structures Contractors Responsibility Included in ASP 6 Submit DT2007 to the engineer & BOS Maintenance Section Inspector must be department-certified active team leader List online see CMM Slide 31 New Structural Approach Slabs US Highways & Interstates Slide 32 Every Day Counts FHWA Initiative Bridge Manual ABC chapter Completed WisDOT projects: Precast deck panels, abutments & pier caps; Inverted T girders; Superstructure lateral slides; Geosynthetic reinforced soil (GRS) abutments Slide 33 Upcoming WisDOT projects: Self-Propelled Modular Transporter (SPMT), precast columns and pier cap, precast inverted T WisDOT continues to look for projects where ABC provides clear benefits. Slide 34 Call us with Questions We look forward to another great year of bridge construction! Slide 35