Willy F. Grimmke, P.E. Kyle M. Vandewater County Superintendent of Public Works Public Works Manager Washington County DPW Washington County DPW 383 Broadway 383 Broadway Fort Edward, NY 12828 Fort Edward, NY 12828 (518) 746-2440 (518) 746-2440 wgrimmke@co.washington.ny.us kvandewater@co.washington.ny.us

Synopsis:

Washington County DPW began fabricating and installing precast bridge panels with three goals in mind: 1. Reduce the length of bridge closures. 2. Stretch the construction season. 3. Conduct short-span superstructure replacements within the limitations of our maintenance budget. To date the county has completed three separate spans configured as a simple span slab bridge, and transverse panels set on existing beams. This presentation will cover the design and construction of these three spans.

About the Presenters:

Willy Grimmke is the Superintendent of Public Works for Washington County. He has been with Washington County since 1997. He provides general supervision of the Department and manages the County's Federal Aid projects. Prior to joining the County, Mr. Grimmke managed transportation design and construction projects with a local engineering firm. He has also worked for the Connecticut Department of Transportation. Kyle Vandewater is the Public Works Manager for Washington County. He has been with Washington County since 2001. He provides general supervision for the Solid Waste Division and manages construction performed by county forces in the Highway Division. Mr. Vandewater also has worked as a project manager for Stonebridge Iron and Steel, and the Chazen Companies.

SESSION 3.4

Design, Fabrication and Erection Of Precast Concrete Deck Panels

Washington County DPW 1

Design, Fabrication, and Erection of Precast Concrete Deck Panels

Willy F. Grimmke, P.E. SuperintendentKyle M. Vandewater, Deputy Superintendent

Washington County Department of Public Works

27 October 2004

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Washington County DPW

Division of HighwaysDivision of Highways60 men staffing 8 maintenance substations.116 County bridges, spans > 20’-0”120 County bridges, spans < 20’-0”

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Washington County DPW

285 miles ofCounty highways.

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Washington County DPWDivision of Solid WasteDivision of Solid Waste

20 men staffing 5 transfer stations.

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Washington County DPW

Engineering DivisionEngineering DivisionStaff of 3 provide surveying and engineering services.

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Washington County DPW

Bridge Repair CrewBridge Repair CrewBridge Welder, Carpenter, Flagger.

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Washington County DPW

Bridge CrewBridge CrewForeman, 2 Carpenters & 1 Laborer.

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Washington County DPW

Emergency BackEmergency Back--up Bridge Crewup Bridge CrewForeman, 2 Carpenters & 1 Laborer.

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Washington County DPWBridge Program

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Why Precast?PROS

Reduce the length of bridge closures.Stretch the construction season.Address short span construction within our maintenance budget.

CONSLimited by weight.Construction joints.

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DesignMaximum panel weight: 12.5 tons.H20 loading.Designed from a maintenance standpoint.Developed spreadsheet model.

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DesignREINFORCED CONCRETE SLAB BRIDGE

Exterior panelC206Bridge No.:CR12Road Carried:Town of WhitehallPolitical Unit:

pcf145.00g c = Unit wt. concrete:ft11.75Sc = Clear Span:( = S c + t )ft12.83S = Effective span:ft1.08t = Slab Thickness:

ft30.00Wc = Clear width:( for analysis )ft1.00b = Unit width:psf30.00WS = Wearing Surface:

plf70.00Rail = Railing:psf30.00FOL = Future Overlay:

plf190.99DL = b x t x g c + b (FOL) + b (Rail/W c) x 2 DL = Dead Load:

kip ft3.93MDL = (DL x S 2)/8MDL = Dead Load Moment:

25.00HS = Live Load (HS25):

AASHTO 3.8.2Impact allowance is a fraction of live load stress, and shall not exceed 30% (1.3)Impact:

1 + (50 ft)/(Sc + 125 ft)I = 1.3

(Spans upto and including 50 ft .)900 x SMLL = Live Load Moment:

(Spans 50 ft . to 100 ft .)1000 x (1.3 x S - 20)

kip ft14.43MLL = kip ft18.76MLL(I) = with factored impact:

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Casting Photo 3

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Panel Loading & ShippingJohn Deere 644 loader.Gradall.

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Loading Photo 5

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Loading Photo 6

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Bridge C89; County Route 74 over Marshall Brook, Village of Greenwich

Existing bridge constructed 1939.Concrete parapet rail system.Erosion/scour issues.Concrete deck in failure.That pesky water main.

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Ex photo 2

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Ex photo 3

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Ex photo 6

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Scour repair photo 2

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Demolition photo 1

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Demolition photo 3

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Headwall photo 1

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Headwall photo 2

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Headwall photo 4

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Superstructure photo 4

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Superstructure photo 6

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Superstructure photo 7

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Superstructure photo 10

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After

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Bridge C37; County Route 16 over Mount Hope Brook, Town of Fort Ann

Original bridge constructed 1930’s.Existing bridge re-constructed 1994.A588 beams with CCA PT wood deck.Premature corrosion of beams.

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Ex Conditions photo 1

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Ex Conditions photo 3

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Detour Bridge photo 1

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Detour Bridge photo 4

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Detour Bridge photo 7

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Beam Prep photo 1

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Beam Prep photo 4

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Beam Prep photo 6

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Superstructure photo 2

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Superstructure photo 4

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Superstructure photo 5

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Superstructure photo 9

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Superstructure photo 10

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Superstructure photo 11

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Superstructure photo 13

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Finished Bridge Pictures

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Finished Bridge Pictures

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Bridge C206; County Route 12 over unnamed stream, Town of Whitehall

Existing bridge re-constructed and widened under the Erwin Plan, 1952.Severe deterioration of abutments and fascia girders.

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Exist Conditions photo 1

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Ex photo 4

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Ex photo 5

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Abutment Repairs photo 1

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Abutment Repairs photo 5

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Abutment Repairs photo 7

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Abutment Repairs photo 8

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Superstructure photo 1

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Superstructure photo 5

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After

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After

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Design, Fabrication, and Erection of Precast Concrete Deck Panels

Questions?

Washington County Department of Public Works

27 October 2004