3. Plans.pdf

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AutoCAD SHX Text %%u ELEVATION %%u

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ABUT. 2

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ABUT. 1

AutoCAD SHX Text Q HW El. 7301.5

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AutoCAD SHX Text 5% Grade

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AutoCAD SHX Text Existing profile at ~C Bridge

AutoCAD SHX Text Wing B

AutoCAD SHX Text Wing A

AutoCAD SHX Text Wing D

AutoCAD SHX Text Wing C

AutoCAD SHX Text El. 7306.00

AutoCAD SHX Text El. 7306.00

AutoCAD SHX Text ~C Bridge and trail alignment

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SILVER

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CREEK

AutoCAD SHX Text Steel end cover plate, typ.

AutoCAD SHX Text Prefabricated weathering steel truss superstructure, 39'-10" length, out-to-out end posts

AutoCAD SHX Text 0.0% grade

AutoCAD SHX Text Existing concrete abutments and riprap, typ.

AutoCAD SHX Text As-built Between abutment backwalls

AutoCAD SHX Text Raise concrete backwalls to match prefab truss deck elevation

AutoCAD SHX Text (Fixed Bearing)

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AutoCAD SHX Text Prefabricated weathering steel truss superstructure, 39'-10" length, out-to-out end posts

AutoCAD SHX Text Existing Concrete Abutments, Typ.

AutoCAD SHX Text 2x12 S4S Douglas Fir deck planks with 14" gaps, typ.

AutoCAD SHX Text (As-built)

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AutoCAD SHX Text Existing concrete abutments, typ.

AutoCAD SHX Text #4 (Tot. 4)

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AutoCAD SHX Text #4 (Tot. 14)

AutoCAD SHX Text %%u NEW MINOR CONCRETE AT ABUT 1 AND ABUT 2 %%u

AutoCAD SHX Text Scale: 3/4" = 1'-0"

AutoCAD SHX Text Drill and epoxy rebar 5" deep into existing backwall

AutoCAD SHX Text Raise concrete backwalls to match prefab truss deck elevation

AutoCAD SHX Text Restore damaged concrete on Abut 1

AutoCAD SHX Text Restore damaged concrete on Abut 1

AutoCAD SHX Text #4 Typ.

AutoCAD SHX Text Restore damaged concrete on Abut 1

AutoCAD SHX Text Restore damaged concrete on Abut 1

AutoCAD SHX Text Existing concrete abutments, typ.

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AutoCAD SHX Text As-built

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AutoCAD SHX Text Epoxy-Set All-Thread per Prefab Bridge Shop Drawing

AutoCAD SHX Text Epoxy-Set All-Thread per Prefab Bridge Shop Drawing, typ.

AutoCAD SHX Text %%u SECTION AT ABUTMENT %%u

AutoCAD SHX Text Scale: 1/2" = 1'-0"

AutoCAD SHX Text 2x12 S4S Douglas Fir deck planks

AutoCAD SHX Text Prefabricated weathering steel truss

AutoCAD SHX Text Existing concrete abutments, typ.

AutoCAD SHX Text Bearing Plates and Epoxy-Set All-Thread per Prefab Bridge Shop Drawing

AutoCAD SHX Text Clear

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MAGNETIC

AutoCAD SHX Text Lake Alpine dam crest El. = 7305.30 Lake Alpine dam spillway invert El. = 7302.00

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HYDROLOGY AND HYDRAULICS

AutoCAD SHX Text Drainage area = 2.5 sq.mi.

AutoCAD SHX Text Mannings coefficient n=0.04

AutoCAD SHX Text Precipitation, P=50 in. per year

AutoCAD SHX Text Q = 625 cfs; El. 7301.5; V = 6.8 fps

AutoCAD SHX Text Stream slope = 1%

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DISREGARD PRINTS BEARING EARLIER DATES

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AND DATE

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STAFF ENGINEER TRANSPORTATION STRUCTURES

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REGIONAL ENGINEER

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REVISION MARK

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APPROVED:

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RECOMMENDED:

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CHECKED

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DESIGNED

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DRAWN

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U. S. DEPARTMENT OF AGRICULTURE

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DATE

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DATE

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SCALE:

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DATE

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BRIDGE SHEET

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DRAWING NUMBER

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OF

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FOREST SERVICE

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REGION FIVE

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STATE

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FOREST

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TOTAL

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SHEETS

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PROJECT NAME

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PROJECT NO.

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SHEET

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UPPER SILVER CREEK BRIDGE

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NEW PREFAB STEEL TRUSS

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PLAN, ELEVATION, AND DETAILS

AutoCAD SHX Text As Noted

AutoCAD SHX Text R-1750-01

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AutoCAD SHX Text C. Shields

AutoCAD SHX Text 8/26/24

AutoCAD SHX Text C. Shields

AutoCAD SHX Text 8/26/24

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STANISLAUS

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CA

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AutoCAD SHX Text D. Pereira

AutoCAD SHX Text 8/28/24

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ESTIMATED BRIDGE QUANTITIES

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ITEM NO

AutoCAD SHX Text 15101 Mobilization Lump Sum Mobilization Lump Sum Lump Sum 55504 Prefabricated Bridge Superstructure - Prefabricated Bridge Superstructure - Design, Fabricate, Deliver and Install * Lump Sum Lump Sum 60101 Minor Concrete** (0.6 CY) Lump Sum Minor Concrete** (0.6 CY) Lump Sum Lump Sum

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DESCRIPTION

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QUANTITY

AutoCAD SHX Text *Pay Item 55504 includes supply and installation of timber deck planks, steel end cover plates, and steel bearing plates. **Pay Item 60101 includes supply and installation of epoxy set anchor all-thread and rebar.

AutoCAD SHX Text Latitude 38.48170, Longitude -119.99103

AutoCAD SHX Text Section 3, Township 7N, Range 18E

AutoCAD SHX Text GENERAL NOTES This project replaces a damaged timber bridge (already removed) with a prefabricated steel truss superstructure. The existing abutments shall be modified to raise the backwalls to match the new elevation of the truss deck planks, as well as, patching two areas of damaged concrete on Abutment 1. SPECIFICATIONS: Design: AASHTO LRFD Bridge Design Specifications, Ninth Edition, 2020, and the AASHTO LRFD Guide Design: AASHTO LRFD Bridge Design Specifications, Ninth Edition, 2020, and the AASHTO LRFD Guide Specifications for Design of Pedestrian Bridges. CONSTRUCTION: Standard Specifications for Construction of Roads and Bridges on Federal Highway Projects, FP-14, with : Standard Specifications for Construction of Roads and Bridges on Federal Highway Projects, FP-14, with Forest Service Supplemental Specifications. DESIGN LOADS: Dead Loads: Concrete = 150 PCF. Earth pressure equivalent to a fluid weighing 64 PCF. Live Load = 90 psf. Dead Loads: Concrete = 150 PCF. Earth pressure equivalent to a fluid weighing 64 PCF. Live Load = 90 psf. Snow load = 450 psf. Live load and Snow load are not combined. Equestrian Live Load = 1,000 pound single hoof load over a deck plank square area measuring 4 inches on a side. Wind load = 75 PSF (100 mph). SEISMIC CRITERIA: Acceleration coefficient = .34g, Site class = B, Seismic zone = 2. Acceleration coefficient = .34g, Site class = B, Seismic zone = 2. DEFLECTION CRITERIA: Allowable deflection for pedestrian live load = span/360. The Bridge shall be cambered to offset the Allowable deflection for pedestrian live load = span/360. The Bridge shall be cambered to offset the calculated Dead Load plus 6". The first fundamental frequency of vibration, without live load, shall be greater than 3.0 hertz. Allowable deflection for lateral wind load = span/360. CONCRETE: Cast in place concrete shall meet the Specification for Minor Concrete (601), with a 28 day compressive strength of 3,500 psi, and be Cast in place concrete shall meet the Specification for Minor Concrete (601), with a 28 day compressive strength of 3,500 psi, and be air-entrained. Chamfer all exposed edges 3/4". Exposed surfaces shall have a Class 2 rubbed finish. Additives containing calcium chloride shall not be used. REINFORCING STEEL: Reinforcing steel shall conform to the requirements of AASHTO M31 (ASTM A615), Grade 60. Unless otherwise shown, minimum Reinforcing steel shall conform to the requirements of AASHTO M31 (ASTM A615), Grade 60. Unless otherwise shown, minimum covering to face of steel shall be 2". PREFABRICATED BRIDGE SHALL MEET THE ABOVE AND FOLLOWING SPECIFICATIONS: SHOP DRAWINGS: The contractor shall submit to the Engineer for approval the design drawings, calculations, and shop The contractor shall submit to the Engineer for approval the design drawings, calculations, and shop drawings for the prefabricated bridge. The shop drawings shall be prepared by the AISC Certified steel fabrication shop that is fabricating the bridge. DESIGN AND FABRICATION: Design of bridge superstructure and railing shall conform to dimensions and materials shown in the Design of bridge superstructure and railing shall conform to dimensions and materials shown in the typical section, elevation, and abutment details on this drawing, and shall be in accordance with AASHTO LRFD Bridge Design Specifications, Ninth Edition, and the AASHTO Guide Specifications for Design of Pedestrian Bridges. Structural design shall be by a Professional Engineer registered in the State of California, with previous bridge design experience. The prefabricated bridge shall be fabricated by an AISC Certified steel fabricator, certified for Major Steel Bridges (CBR), within the AISC certified premises of the fabricator. STRUCTURAL STEEL: All structural steel plate and shapes for the prefabricated bridge shall conform to AASHTO M270, Grade All structural steel plate and shapes for the prefabricated bridge shall conform to AASHTO M270, Grade 50W (ASTM A709, Grade 50W or A588) and ASTM A847 for hollow structural sections (HSS). Minimum HSS wall thickness shall be 1/4". This steel is intended for use in unpainted condition and shall not be painted. All weathering steel shall be blast cleaned to remove all mill scale and permit even weathering as provided in SSPC-SP-6 Commercial Blast Cleaning. Bolts shall conform to AASHTO M164 (ASTM A325), type 3. TIMBER: Deck planks shall be Coastal Douglas-Fir, No. 1 or better, S4S, conforming to AASHTO M168. Deck planks shall be Deck planks shall be Coastal Douglas-Fir, No. 1 or better, S4S, conforming to AASHTO M168. Deck planks shall be pressure treated with copper napthenate in heavy oil, in accordance with AASHTO M133 and AWPA U1-09, Use Category UC4B. copper napthenate in heavy oil, in accordance with AASHTO M133 and AWPA U1-09, Use Category UC4B. Treated materials shall follow the post treatment requirements summarized in "Best Management Practices for the Use of Treated Wood in Aquatic Environments" (WWPI 1996) to ensure all surfaces are free of excess preservative, and chemicals are adequately fixated in the wood. All treated wood members shall be BMP certified by an ALSC accredited inspection agency. All wood members shall be cut and drilled before treatment. When miscellaneous field drilled holes and cuts are required because of mis-alignment, they must be approved by the Engineer. Field drilled holes and cuts shall be field treated with two applications of copper naphthenate 2% solution. Lead holes are required for all bolts. MISCELLANEOUS STEEL: Anchor bolts, nuts, and washers shall conform to AASHTO M164 (ASTM A449) Type 3, AASHTO M291 Anchor bolts, nuts, and washers shall conform to AASHTO M164 (ASTM A449) Type 3, AASHTO M291 (ASTM A563) grade DH3, and AASHTO M293 (ASTM F436) type 3, respectively. CONSTRUCTION NOTES: Contractor shall verify all as-built and field dimensions before start of work. Contractor shall verify all as-built and field dimensions before start of work.