Swift_Creek_Trail_Bridge_Plan_Set.pdf

SHEET INDEX

1 TITLE SHEET & VICINITY MAP

LOCATION: T24S R04E SEC 11

FOREST SERVICE - REGION SIX

WILLAMETTE NATIONAL FOREST

DRAWINGS FOR

WESTERN OREGON

INDEX MAP

SWIFT CREEK TRAIL BRIDGE

TYPICAL SECTION & GENERAL NOTES

SUPERSTRUCTURE DETAILS

SUBSTRUCTURE DETAILS

DESIGNED BY:

COLE SMITH, CIVIL ENGINEER, WIL/SIU/MTH NF DATE

REVIEWED BY:

WILLIAM BUTLER, BRIDGE ENGINEER, WIL/SIU/MTH NF DATE

REVIEWED BY:

JEFF CASWELL, DEVELOPMENT ENGINEER, WIL/SIU/MTH NF DATE

APPROVED BY:

TIM LAHEY, ACTING DISTRICT RANGER, MIDDLE FORK RD DATE

APPROVED BY:

DARREN LEMON, SUB REGIONAL ENGINEER DATE

VICINITY MAP

FOREST SERVICE ROAD

US HIGHWAY

CITY OR TOWN

0 1 2 4

SCALE IN MILES

LEGEND

ASTORIA

PORTLAND

THE

DALLES

TILLAMOOK

DETROIT

CORVALLIS

BEND

EUGENE

FLORENCE

REEDSPORT

COOS

BAY

ROSEBURG

GRANTS

PASS

MEDFORD

SALEM

NEWPORT

T21S R04E T21S R05ET21S R03E

T22S R03E

T22S R04E

T22S R05E

T23S R03E

T23S R04E

T23S R05E

T24S R03E

T24S R04E

T24S R05E

PROJECT

SITE

TO SPRINGFIELD, OR

40 MILES

OAKRIDGE, OR

PROJECT LOCATION: 0.25 MILES W ON

TRAIL 3609 FROM FS ROAD 2100-393

HILLS CREEK

RESERVOIR

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TYPICAL SECTION

NOT TO SCALE

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GENERAL NOTES:

SPECIFICATIONS: MATERIALS AND CONSTRUCTION OF THIS STRUCTURE SHALL BE IN

ACCORDANCE WITH THE STANDARD SPECIFICATIONS FOR CONSTRUCTION OF ROADS

AND BRIDGES ON FEDERAL HIGHWAY PROJECTS (FP-03).

PREFABRICATED STEEL BRIDGE SUPERSTRUCTURE: PREFABRICATED STEEL

SUPERSTRUCTURE DESIGN MUST BE A TRUSS CONFIGURATION SIMILAR TO THAT

SHOWN ON THE DRAWINGS. THE BRIDGE SHALL MAINTAIN THE CLEARANCES ABOVE

HIGH WATER INDICATED ON THE BRIDGE ELEVATION ON SHEET 3. THE BRIDGE

CROSS-SECTION SHALL BE DETERMINED BY THE CONTRACTOR, BUT SHALL PROVIDE

THE WIDTH AND RAILING DETAILS AS INDICATED ON THE BRIDGE TYPICAL SECTION.

ALL RELATED DETAILS SUCH AS PROFILE, ABUTMENT DETAILS, BEARINGS AND TIMBER

DECKING SHALL BE THE RESPONSIBILITY OF THE CONTRACTOR TO FINALIZE AND

CONSTRUCT.

DESIGN: THE DESIGN OF ALL PREFABRICATED STEEL BRIDGE SUPERSTRUCTURE

ELEMENTS SHALL COMPLY WITH THE AASHTO LRFD GUIDE SPECIFICATION FOR

DESIGN OF PEDESTRIAN BRIDGES, CURRENT EDITION AND AASHTO LRFD BRIDGE

DESIGN SPECIFICATIONS, CURRENT EDITION. PROVIDE CAMBER FOR 100% OF THE

FULL DEAD LOAD DEFLECTION PLUS 1% OF BRIDGE SPAN. SUBMIT SHOP DRAWINGS

AND DESIGN CALCULATIONS TO THE CO FOR APPROVAL AND MUST BE APPROVED

BEFORE FABRICATION. SUPERSTRUCTURE DESIGN SHALL BE STAMPED BY A

REGISTERED PROFESSIONAL ENGINEER (REGISTERED IN THE STATE OF OREGON)

PRIOR TO FABRICATION.

SUPERSTRUCTURE MATERIALS: USE STEEL SHAPES, PLATES AND BARS OF

WEATHERING STEEL CONFORMING TO AASHTO M270, GRADE 50W (ASTM A588 OR

ASTM A242) OR ASTM A847 FOR SQUARE AND RECTANGULAR TUBING. MINIMUM STEEL

THICKNESS SHALL BE AS SPECIFIED IN THE GUIDE SPECIFICATIONS FOR DESIGN OF

PEDESTRIAN BRIDGES. USE HIGH STRENGTH BOLTS CONFORMING TO AASHTO M164,

(ASTM A325), TYP 3, UNLESS NOTED OTHERWISE. USE MALLEABLE IRON WASHERS

AGAINST WOOD.

STEEL FABRICATION: THE PREFABRICATED STEEL BRIDGE SUPERSTRUCTURE SHALL

BE FABRICATED BY AN AISC CERTIFIED PLANT. WHEN STRUCTURAL STEEL IS TO BE

WELDED, THE WELDING PROCEDURE SHALL BE IN ACCORDANCE WITH AWS D1.5 AND

SHALL BE SUITABLE FOR THE GRADE OF STEEL AND INTENDED USE OR SERVICE.

SUBSTRUCTURE MATERIALS: REINFORCED CONCRETE SHALL BE A MINIMUM OF 4,000

PSI. BAGGED CONCRETE MIX IS ACCEPTABLE. REINFORCING STEEL SHALL CONFORM

TO AASHTO M31 GRADE 60. MAINTAIN 2 INCH CONCRETE COVER.

TIMBER & LUMBER : SOLID SAWN TIMBER MEMBERS SHALL CONFORM TO THE

REQUIREMENTS OF THE GRADING RULES AGENCY FOR THE SPECIES, TYPE AND

GRADE SPECIFIED BELOW.

DECK PLANKS, ENDWALL PLANKS AND HANDRAILS:

- WESTERN RED CEDAR, S4S, NO. 2 GRADE OR BETTER, GRADING RULES

AGENCY - WWPA, WCLIB

TREATMENT: THE USE OF PRESSURE TREATED WOOD SHALL NOT BE

PERMITTED ON THIS PROJECT.

HYDROLOGY & HYDRAULICS: THIS BRIDGE IS DESIGNED TO PASS A 100 YEAR FLOOD

OF 2640 CFS WITH A MINIMUM FREEBOARD OF 3 FEET.

PREFABRICATED,

PRE-ENGINEERED STEEL

TRUSS SUPERSTRUCTURE

4'-0" CLEAR WIDTH

PROVIDE SAFETY RAILS

IN ACCORDANCE WITH

AASHTO REQUIREMENTS,

TYP. EACH SIDE. SEE

PROJECT DESIGN

CRITERIA

4" X 8" MINIMUM

ROUGH SAWN

DECK PLANKS

LATERAL BRACING

AS REQUIRED

TOP OF TRUSS

6" X 1/4" STEEL PLATE OR

2" X 6" CONTINUOUS

TIMBER TOE KICKER

8"

5'-6" MAX. OUT-TO-OUT WIDTH

TOP

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ELEVATION

SPIKE WITH BROOM: PLACE CENTERLINE

BRIDGE & CENTERLINE OF ABUTMENT 1 AT

STAKED LOCATION. PLACE THE BOTTOM

OF THE CONCRETE GRADE BEAM AT AN

ELEVATION 2'-3" BELOW THE EXISTING

ELEVATION OF SPIKE WITH BROOM.

H.W. ELEVATION

(Q100 = 2640)

APPROX. 3'-4"

FREEBOARD OVER Q100

EDGE OF CREEK

SWIFT CREEK

PRE-ENGINEERED,

PREFABRICATED STEEL

TRUSS SUPERSTRUCTURE

80'-0" SPAN

EXISTING 35' SECTION OF

BROKEN 2-LOG STRINGER

BRIDGE TO BE REMOVED BY

FS FORCE ACCOUNT CREW.

PRE-ENGINEERED,

PREFABRICATED STEEL

GIRDER SUPERSTRUCTURE

0 5 10 15

SCALE IN FEET

0 5 10 15

SCALE IN FEET

CONCRETE GRADE

BEAM, TYP. SEE

DETAILS ON SHEET 4

EXISTING 35' SECTION OF

BROKEN 2-LOG STRINGER

BRIDGE TO BE REMOVED BY

FS FORCE ACCOUNT CREW.

CONCRETE GRADE

BEAM, TYP. SEE

DETAILS ON SHEET 4*

SWIFT CREEK

SPIKE WITH BROOM: PLACE CENTERLINE

BRIDGE & CENTERLINE OF ABUTMENT 1 AT

STAKED LOCATION. PLACE THE BOTTOM

OF THE CONCRETE GRADE BEAM AT AN

ELEVATION 2'-3" BELOW THE EXISTING

ELEVATION OF SPIKE WITH BROOM.

EXISTING TRAIL**

EXISTING TRAIL**

EXISTING GROUND

RAISE EXISTING TRAIL

SURFACE AT BRIDGE

APPROACH. DO NOT EXCEED

5% GRADE. SEE

SUBSTRUCTURE & ENDWALL

DETAILS, SHEET 4

RAISE EXISTING TRAIL

SURFACE AT BRIDGE

APPROACH. DO NOT

EXCEED 5% GRADE. SEE

SUBSTRUCTURE &

ENDWALL DETAILS, SHEET

**NOTE:

CENTERLINE ALIGNMENT OF

PROPOSED BRIDGE TO MATCH

EXISTING TRAIL CENTERLINE

ALIGNMENT AT EACH END.

*NOTE:

INSTALL END OF BRIDGE GRADE BEAM

AT THE SAME ELEVATION AS THE

BEGINNING OF BRIDGE GRADE BEAM

ABUTMENT #1

ABUTMENT #2

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2'-0"

CONCRETE GRADE BEAM TYPICAL SECTION

NOT TO SCALE

(2) - 3/4"Ø a307 ANCHOR BOLTS

AT EACH BEARING LOCATION,

MIN. EMBED 6" MIN. INTO

GRADE BEAM. PLACEMENT AND

THREADED PROJECTION* PER

BRIDGE FABRICATOR'S

RECOMMENDATION.

THREAD PROJECTION*

(3) - #4 CONTINUOUS,

EQUALLY SPACED

#4 HOOPS @ 12" ± 1"

(3) - #4 CONTINUOUS,

EQUALLY SPACED

1. AN ALTERNATIVE ANCHOR

BOLT DESIGN MAY BE USED

AS RECOMMENDED BY

STEEL BRIDGE

MANUFACTURER.

2. BEARING DESIGN TO BE

PER SUPERSTRUCTURE

MANUFACTURER'S DESIGN.

NOTE:

SUBSTRUCTURE AND ENDWALL DETAILS

NOT TO SCALE

SECTIONELEVATION

EXISTING GROUND AT BEGINNING OF

BRIDGE APPROACH (OTHER END OF

BRIDGE APPROACH IS SIMILAR).

PROPOSED TOP OF FINISHED TRAIL

SURFACE. BUILD UP APPROACH TRAIL

ELEVATION WITH SUITABLE ON SITE

MATERIAL. COMPACT WITH 3 PASSES

OF VIBRATING PLATE COMPACTOR .

MATCH TRAIL WIDTH WITH BRIDGE

DECK WIDTH. CONSTRUCT SIDE SLOPE

AT 1V: 1.5H MAX.

4X - DECK PLANKS.

MAINTAIN 3/4" GAP ± 1/4"

BETWEEN DECK PLANKS

CONCRETE GRADE BEAM

6" DEPTH AGGREGATE BASE (1" MINUS)

BELOW GRADE BEAM. COMPACT IN (2) X 3"

LIFTS WITH 3 PASSES (EACH LIFT) WITH A

VIBRATING PLATE COMPACTOR OVER

APPROVED SUBGRADE.

4" X 12" X 8'-0" ENDWALL PLANKS

3'-0"

6" TYP.

4" X 12" X 8'-0"

ENDWALL PLANKS

6'-6" GRADE BEAM 6" TYP.

BRIDGE FABRICATOR TO PROVIDE WELDED OR

MECHANICAL STEEL ATTACHMENTS TO BRIDGE

ENDS TO ALLOW FOR CONNECTING ENDWALL

PLANKS WITH (2) x 1/2" Ø HEX BOLTS AND NUTS

WITH STD. WASHER AGAINST STEEL AND

MALLEABLE IRON WASHER AGAINST TIMBER AT

EACH CONNECTION.

3/4" CHAMFER ON TOP

EDGES, TYP.

6" MIN. EACH SIDE

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