A06_Map Drawings GAOA Sweet Creek 2 Trail Bridge - Plan Set Final-Signed.pdf

United States Department of Agriculture Forest Service

SWEET CREEK TRAIL

BRIDGE #2

OREGON

LANE COUNTY

(R06) PACIFIC NORTHWEST

SIUSLAW NATIONAL FOREST

CENTRAL COAST RANGER DISTRICT

TRAIL 1319 - M.P. 0.2793

(LAT 43.954864, LONG -123.902862)

INDEX OF SHEETS

SHEET SHEET TITLE

TITLE & VICINITY MAP

ESTIMATE OF QUANTITIES

GLULAM STRINGER TRAIL BRIDGE 1 (STANDARD PLAN)

GLULAM STRINGER TRAIL BRIDGE 2 (STANDARD PLAN)

GLULAM STRINGER TRAIL BRIDGE 3 (STANDARD PLAN)

SILL ON GABION BASKET (STANDARD PLAN)

BRIDGE PLAN & ELEVATION

ABUTMENT 2 & BACKWALL DETAILS

STAIR DETAILS #1

STAIR DETAILS #2

SHEET OF1 10

RECOMMENDED BY:

ZONE ENGINEER

ALEX YETAYEW, ACTING FOREST ENGINEER, SIUSLAW NF

REVIEWED BY:

SREO = REGION 6, SUB REGIONAL

ENGINEERING ORGANIZATION

PROJECT LOCATION

p p o o o o o o9726 o58

PROJECT

SITE

WESTERN OREGON INDEX MAP

THE

DALLESPORTLAND

SALEM

NEWPORT

FLORENCE

CORVALLIS

EUGENE

TILLAMOOK

BEND

5COOS

BAY

GRANTS

PASS

ROSEBURG 97

MEDFORD

DYLAN NICOLLE, PE, CIVIL ENGINEER, SREO

T18S R11W T18S R10W T18S R9W

T18S R12W

T19S R12W

WOAHINK

LAKE

SILTCOOS

LAKE

T19S R11W T19S R10W

T19S R9W

T20S R11WT20S R12W T20S R10W T20S R9W

FLORENCE, OR

SIUSLAW

RIVER 101

MAPLETON, OR

126 TO EUGENE, OR

45 MILES

SWEET CREEK TRAIL BRIDGE

#3 PROJECT LOCATION

LEGEND

FOREST SERVICE ROAD

STATE HIGHWAY

US HIGHWAY

CITY OR TOWN

VICINITY MAP

T21S R12W

REEDSPORT, OR

UMPQUA

RIVER

T21S R11W T21S R10W T21S R9W

1 2 40

SCALE IN MILES

TO INTERSTATE 5:

56 MILES

SMITH

RIVER

MICHELE HOLMAN, DISTRICT RANGER, CENTRAL COAST RD

DESIGNED BY:

COLE SMITH, PE, STRUCTURAL ENGINEER, SREO

SWEET CREEK HOMESTEAD TRAIL HEAD

COLE SMITH Digitally signed by COLE SMITH Date: 2024.01.03 09:51:40 -08'00'

DYLAN NICOLLE Digitally signed by DYLAN NICOLLE Date: 2024.01.03 10:01:39 -08'00'

ROBERT SANDERS Digitally signed by ROBERT SANDERS Date: 2024.04.17 08:18:46 -07'00'

ALEMAYEHU YETAYEW

Digitally signed by ALEMAYEHU

YETAYEW

Date: 2024.04.18 11:13:51 -07'00'

CONSTRUCTION NOTES:

1) PERFORM CONSTRUCTION IN CONFORMANCE WITH THE STANDARD SPECIFICATIONS FOR CONSTRUCTION OF ROADS AND BRIDGES ON FEDERAL LANDS FP-14 US CUSTOMARY UNITS EXCEPT AS MODIFIED BY SUPPLEMENTAL SPECIFICATIONS AND CLAUSES IN THE CONTRACT DOCUMENT OR THE PLANS.

2) CONTRACTOR SHALL ENSURE ALL EQUIPMENT USED AT THE PROJECT SITE HAS BEEN CLEANED AND WEED-FREE PRIOR TO ENTERING FOREST SERVICE LAND.

3) CONTRACTING OFFICER APPROVAL IS REQUIRED PRIOR TO THE PLACEMENT OF THE FOLLOWING ITEMS: BEDDING OR LEVELING COURSE OF BRIDGE ABUTMENTS AND SETTING OF BRIDGE SUPERSTRUCTURE.

4) REMOVE ALL CONSTRUCTION RELATED REFUSE FROM GOVERNMENT LAND PRIOR TO FINAL ACCEPTANCE.

5) REPAIR ANY DAMAGE TO THE EXISTING TRAIL SYSTEM DUE TO CONTRACTOR'S OPERATIONS, INSIDE OR OUTSIDE THE PROJECT BOUNDARY, AT THE CONTRACTOR'S EXPENSE, PRIOR TO FINAL ACCEPTANCE.

6) CONFINE CONSTRUCTION EQUIPMENT TO THE ROADWAY OR TRAIL, UNLESS OTHERWISE SHOWN ON THE PLANS OR APPROVED BY THE CONTRACTING OFFICER.

7) STORING OF ALL EQUIPMENT ON GOVERNMENT LANDS WILL BE AT THE CONTRACTOR'S RISK AND AT A LOCATION APPROVED BY THE CONTRACTING OFFICER.

8) DEPTHS OF SOIL AND AGGREGATE ARE GIVEN AS FINAL COMPACTED DEPTHS.

10) THE GENERAL STAGING AREA FOR THIS PROJECT SHALL BE AT THE SWEET CREEK HOMESTEAD TRAIL HEAD. THE CONTRACTOR IS PERMITTED A SINGLE INDUSTRIAL CAMP (WITH APPROVED INDUSTRIAL CAMP PERMIT FROM THE SIUSLAW NATIONAL FOREST). THE CONTRACTOR IS PERMITTED TO USE A HELICOPTER FOR THIS PROJECT. THE HELICOPTER STAGING AREA SHALL BE DESIGNATED (IF NEEDED) PRIOR TO HELICOPTER USE WITHIN 20 MILES OF THE PROJECT SITE. THE CONTRACTOR IS RESPONSIBLE FOR NOTIFYING THE CO OF HELICOPTER USE A MINIMUM OF 14 DAYS IN ADVANCE.

11) THE CONTRACTOR SHALL INFORM THE GOVERNMENT OF ANY PLANNED TRAIL CLOSURE AT LEAST 21 DAYS IN ADVANCE.

12) CONTRACTOR SHALL COMPLY WITH SECTION H OF THE CONTRACT FOR TIMING RESTRICTIONS.

13) DIRECTIONS TO THE PROJECT SITE:

FROM EUGENE, OR TRAVEL APPROX. 46 MILES WEST ON OR-126. TURN LEFT (WEST) ONTO S BANK MAPLETON WEST RD/SWEET CREEK ROAD AND TRAVEL APPROX. 10.3 MILES TO THE HOMESTEAD TRAIL HEAD.

BASE BID ITEMS

ITEM NUMBER DESCRIPTION PAY UNIT ESTIMATED QUANTITY REMARKS

15101 MOBILIZATION LUMP SUM ALL INCLUDES FIRE PROTECTION & EQUIPMENT CLEANING

20158 CLEARING AND GRUBBING LUMP SUM ALL INCLUDES REMOVAL OF ROCK FACE FOR NEW TRAIL BRIDGE

20301A REMOVAL OF EXISTING TRAIL BRIDGE, DISPOSAL METHOD A LUMP SUM ALL SEE DETAILS ON SHEET 7

20301B REMOVAL OF ROCK FACE, DISPOSAL METHOD F LUMP SUM ALL

57101 PREFABRICATED TRAIL BRIDGE SUPERSTRUCTURE AND SUBSTRUCTURE - 40'-0" SPAN,

DESIGN FABRICATE DELIVER AND INSTALL LUMP SUM ALL

ALL COMPONENTS, LABOR AND INCIDENTALS NECESSARY FOR BRIDGE AND STAIR CASE

INSTALLATION INCLUDING CONCRETE SUBSTRUCTURE UNITS, GABION BASKET/ROCK, BEARINGS, BACKWALLS, STAIR STRUCTURE, DECKING AND ALL FASTENERS. INCLUDES LOADING, TRANSPORT &

UNLOADING AT THE BRIDGE LOCATION.

ESTIMATE OF QUANTITIES

PROJECT NAME

United States Department of Agriculture Forest Service

OFSHEET

963 - GLULAM TRAIL BRIDGECENTRAL COAST RANGER DISTRICT

SIUSLAW NATIONAL FOREST

SWEET CREEK TRAIL BRIDGE #2 2021

3 10GSB

SWEET CREEK TRAIL BRIDGE #2 2021

4GSB

GAOA NORTH FORK SMITH TRAIL BRIDGES #1, #3 & #4 2021

5 10

B

B

GSB

965 - TRAIL BRIDGE SUBSTRUCTURESCENTRAL COAST RANGER DISTRICT

SWEET CREEK TRAIL BRIDGE #2 12/11/2023

6 10

B

B

GAB

(NOT SHOWN ON DRAWING) REMOVE

AND DISPOSE OF EXISTING 30 FT

LENGTH (2) x SOLID SAWN PT

STRINGER TRAIL BRIDGE AS FOLLOWS:

- REMOVE ALL PRESSURE TREATED

(PT) 3X12 DECK MEMBERS, BACK WALL

PLANKS AND HARDWARE AND DISPOSE

LEGALLY OFF OF GOVERNMENT LAND

- REMOVE (2) 6X18 X 30 FT PT SOLID

SAWN DOUGLAS FIR BEAMS (BOTH

BROKEN DOWN THE MIDDLE) AND

DISPOSE LEGALLY OFF OF

GOVERNMENT LAND.

- REMOVE PT TIMBER SILLS AT

ABUTMENT 1 AND ABUTMENT 2 AS

WELL AS PT RAILROAD TIES AT

ABUTMENT 1 APPROACH AND DISPOSE

LEGALLY OFF OF GOVERNMENT LAND

- REMOVE EXISTING NATIVE ROUND

TIMBER RAILING AND SCATTER ON THE

UPHILL SIDE OF THE TRAIL AT LEAST 10

FT OFF OF THE TRAIL.

PROJECT NAME

United States Department of Agriculture Forest Service

OFSHEET

BACKFILL BEHIND BACKWALLS WITH SUITABLE ON

SITE MATERIAL, TYP. COMPACT IN 4" LIFTS WITH A

HAND TAMPER UNTIL VISIBLE DEFLECTION CEASES.

PLACE ABUTMENT 2 AT AN ELEVATION SUCH THAT THE TOP OF THE NEW

BRIDGE DECK MATCHES THE TOP OF THE EXISTING TRAIL. PLACE

ABUTMENT 1 AT ELEVATION THAT MATCHES THE PROPOSED

GRADIENT (3%) AS SHOWN IN THE BRIDGE ELEVATION DETAIL ON THIS

SHEET.

C BEARING ABUTMENT 1 AND C OF

BRIDGE AS STAKED BY CO

L L

7" RING SHANK

NAILS, TYP BRIDGE RAIL CAP

6" 40'-0" CENTERLINE BEARING TO CENTERLINE BEARING 6"

EXISTING

TRAIL

BRIDGE ELEVATION

0' 2' 4'2'

SCALE IN FEET

BRIDGE PLAN

0' 2' 4'2'

SCALE IN FEET

5'-0", MAX,

TYP.

C BEARING ABUTMENT 2 AND C OF

BRIDGE AS STAKED BY CO

L L

NEW TIMBER GLULAM TRAIL

BRIDGE STRUCTURE

PT TIMBER BACKWALL. SEE

DETAILS ON SHEET 8

REINFORCED CONCRETE GRADE

BEAM. SEE DETAILS ON SHEET 8

EXISTING TRAIL SURFACE

EXISTING

TRAIL

DIP IN BEDROCK/CLIFF AREA

EXISTING GROUND

ALONG BRIDGE

CENTERLINE

(2) - 5 1/8" WIDTH x 24" DEPTH x 41'-0"

GLULAM STRINGER TRAIL BRIDGE

40'-0" CENTERLINE BEARING TO CENTERLINE BEARING

5'-0", MAX,

TYP.

41'-0" OUT-OUT

3% ON

BRIDGE

BEDROCK

REINFORCED CONCRETE GRADE

BEAM. SEE DETAILS ON SHEET 8

GABION BASKET. SEE

DETAILS ON SHEET 6

STAIR STRUCTURE. SEE

DETAILS ON SHEETS 9 & 10

STAIR STRUCTURE. SEE

DETAILS ON SHEETS 9 & 10

NOTE:

FABRICATE RAIL POST HOLES AND CUT

BEAMS ENDS TO BE INSTALLED PLUMB.

BEDROCK

APPROX. 8' x 6' x 4' ROCK OUTCROP TO BE REMOVED TO

PROVIDE CLEARANCE FOR NEW BRIDGE (PAY ITEM 20301B)

PROJECT NAME

Forest Service

OFSHEET

SUBSTRUCTURE AND DESIGN NOTES:

CONCRETE SILL: CAST-IN-PLACE OR PRECAST IS ACCEPTABLE. USE

STRUCTURAL CONCRETE WITH A 7 SACK MIN. MIX. 4%-6% AIR ENTRAINMENT,

SLUMP NOT EXCEEDING 4 INCHES, AND MAXIMUM AGGREGATE SIZE OF 3/4 INCH.

SUBMIT A MIX DESIGN TO BE APPROVED BY THE CO. PROVIDE A TROWELED

SURFACE FINISH UNLESS OTHERWISE SPECIFIED.

REINFORCING STEEL: FURNISH REINFORCING STEEL CONFORMING TO ASTM

A615 (AASHTO M31) GRADE 60. PROVIDE 2 INCH CLEAR CONCRETE COVER FOR

ALL REBAR, UNLESS NOTED OTHERWISE ON THE PLANS.

BEARING CAPACITY: BRIDGE ABUTMENTS SHALL BE UNDERLAIN BY BEDROCK.

THE ESTIMATED UNFACTORED BEARING CAPACITY OF BEDROCK IS 2000 PSI.

SNOW LOAD: SNOW LOAD IN THE PROJECT AREA = 23 PSF.

HYDRAULICS: THIS BRIDGE IS CROSSING A DIP IN THE ROCK/CLIFF AREA OF THE

TRAIL AND IS NOT CROSSING A STREAM, THEREFORE HYDRAULIC

CALCULATIONS ARE N/A.

2" IF PRECAST, 3" IF

CAST-IN-PLACE

1' -6

2'-0"

TYPICAL GRADE BEAM SECTION

#4 HOOPS WITH 3" MINIMUM EXTENSIONS @

12" MAXIMUM SPACING.

4 - #6 EQUALLY SPACED

(2) X 3/4" ANCHOR BOLT AT EACH BEARING SHOE W/ 3/4" HEX

NUT AND PLAIN WASHER, TYP. EMBED 3/4" Ø ALL THREAD 8"

MIN. INTO GRADE BEAM.

C SUPERSTRUCTURE

BEARING & ABUTMENT

L

NOT TO SCALE

ABUTMENT 2 ELEVATION TYPICAL

NOT TO SCALE ABUTMENT 2 PROFILE VIEW

NOT TO SCALE

6" , C

LR

GLULAM GIRDERS

4X12 TREATED TIMBER BACKWALL PLANKS; LENGTHS AS NEEDED TO RETAIN FILL AT A

MAX. SIDE SLOPE OF 1.5H : 1V. FASTEN EACH BACKING PLANK TO EACH STRINGER WITH

(3) - 7" RING SHANK NAILS. RIP BOTTOM BACKWALL PLANK TO FIT, AS SHOWN

TIMBER DECK PLANK, TYP.

FINISHED TRAIL

SURFACE

BEARING SHOE, TYP. SEE DETAIL ON THIS SHEET

EXISTING GROUND

NEW GROUND: SLOPE TO DRAIN (1% MIN.)

BACKFILL AROUND GRADE BEAM WITH SUITABLE ON SITE MATERIAL.

COMPACT IN 4" LIFTS WITH A HAND TAMPER UNTIL VISIBLE

DEFLECTION CEASES. MATCH THE EXISTING GRADE.

REINFORCED CONCRETE GRADE BEAM

(SEE DETAILS BELOW)

4'-0"

NOTE: RAILING NOT SHOWN FOR CLARITY

C 1"Ø HOLE FOR

3/4"Ø BOLT & NUT

W/STANDARD PLAIN

WASHERS

C

BEARING

8"

8"

2"

SIDE VIEW

8 1/2"

C 7/8"Ø HOLES

ANCHOR BOLTS

1/2"

PLATE

C

STRINGER

FULL PEN.

C BEARING

& STRINGER

2"

1/

2"

4 1/2" 5 1/2"

4 1/2" 1'-2 1/2"

C 7/8"Ø HOLES FOR

ANCHOR BOLTS

C BEARING &

ABUTMENT

1/2" PLATE

PLAN

1/2" x STRINGER WIDTH x 6"

ELASTOMERIC

PAD

BEARING SHOE DETAIL

END VIEW

NOT TO SCALE

1 1/2" 1"

4 1/4"

L

L

L

L

L

L

L

STRINGER WIDTH

MINUS 1/4"

5 1/2"

3/4" Ø BOLT & NUT W/ (2) - MALLEABLE IRON WASHERS

4X6 BACKING PLANK STIFFENER. ATTACH W/ (2) 1/2" Ø

BOLTS W/ (2) MALLEABLE IRON WASHERS PER BACKING

PLANK SPACED DIAGONALLY FROM EACH OTHER

1.5H

1V

PLACE GRADE BEAM ON SOLID ROCK. FILL IN/FLATTEN ANY INCONSISTENCIES IN

ROCK WITH IN-SITU MATERIAL TO ENSURE UNIFORM BEARING. COMPACT WITH A

HAND TAMPER UNTIL VISIBLE DEFLECTION CEASES.

4 - #6 REBAR EQUALLY SPACED

PROJECT NAME

Forest Service

OFSHEET

STAIR STRINGER DETAIL (2 AT ABUTMENT 1 END)

NOT TO SCALE

6" 9"

13/16" Ø

11/16" Ø

1'

- 1

/4

3 3/4"

4"

6' -2

10'-1 1/4"

11"

TYP.

3 1/2"

9"

13/16" Ø

1'-3 3/8" 3"

9/16" Ø

4"

2"

STAIR RAILING TYPE, GEOMETRY AND

CONNECTIONS TO MATCH BRIDGE RAILING.

SEE TYPICAL CROSS SECTION ON SHEET 4

FIELD CUT ENDS OF BRIDGE AND

STAIR RAILING TO MATCH UP AS

SHOWN, TYP. ALL RAILING ENDS

STAIR POST, TYP. SEE DETAIL ON THIS SHEET

FIELD CUT RAIL ENDS

PLUMB AND IN LINE WITH

FRONT EDGE OF BOTTOM

STAIR TREAD AS SHOWN

7" MAX STEP HEIGHT

ONTO FIRST STEP

FILL EXISTING TRAIL AS

NEEDED WITH ON SITE

MATERIAL TO CONSTRUCT

STAIRS AS SHOWN.

COMPACT WITH 3 PASSES

OF A VIBRATING PLATE

COMPACTOR

8X12 X 4'-6" PT TIMBER DF-L SILL. PLACE

AND COMPACT 6" OF ON SITE ROCK (3"

MINUS) UNDER THE SILL FOR DRAINAGE

SEE STAIR

TREAD

DETAIL ON

SHEET 10

SEE STAIR STRINGER TO

SILL CONNECTION. SEE

DETAIL ON SHEET 10

STAIR STRINGER TO

SUPERSTRUCTURE

CONNECTION. SEE

DETAIL ON SHEET 10

CONCRETE SILL ON

GABION FOUNDATION. SEE

DETAILS ON SHEET 8

PT 4X12 DF-L STAIR

TREAD, TYP.

PT 6X18 DF-L

STAIR

STRINGER

STAIR RAIL POST DETAIL

NOT TO SCALE

5 1/2"

5' -5

/8

4X6 PT DF-L STAIR

RAIL POST, TYP.

13/16" Ø HOLES. ATTACH

POSTS WITH (2) 3/4" Ø X 13"

LENGTH HEX BOLTS WITH

NUTS AND M.I. WASHERS

3"

9"

STAIR GEOMETRY NOTE:

STAIR GEOMETRY MAY BE MODIFIED TO ACCOMMODATE

ACTUAL SUB-SURFACE FIELD CONDITIONS AND/OR

DEVIATION IN SUPERSTRUCTURE DEPTH FROM WHAT IS

ASSUMED ON THE PLAN SET SHEETS. IF STAIR GEOMETRY

DEVIATES FROM WHAT IS SHOWN ON THIS SHEET, THE

CONTRACTOR SHALL SUBMIT THE PROPOSED CHANGE TO

THE CO IN WRITING FOR REVIEW AND APPROVAL AT LEAST

14 DAYS PRIOR TO CONSTRUCTING THE STAIRS.

BEARING ASSEMBLY, TYP. SEE

DETAILS ON SHEET 8

20% MAX

GABION FOUNDATION. SEE

DETAILS ON SHEET 6

9"

13/16" Ø

5'-11 3/8"

7" TY

P.

2'-5"

4 7/8"

17 1/2"

5 1/2"

3 1/2"2 3/16"5 1/4"

2'-2 1/2"

PLAN

(2) 3/4" Ø X 12" LENGTH

HEX BOLTS WITH NUTS

AND M.I. WASHER, TYP.

4X6 RAIL POST, TYP.

C BRIDGEL

PT 4X12 DF-L

DECK PLANK

ELEVATION

4X12 DECK

PLANK

4X6 STAIR RAIL POST, TYP.

4X12 STAIR TREAD,

TYP.

STAIR STRINGER TO BACKWALL

ANGLE: L4X4X3/8, TYP.

PT 6X18 DF-L STAIR STRINGER

4X12 X 4'-6" PT DF-L BACKWALL (RIP

BOTTOM PLANK TO FIT)

PT 4X12 X 3'-3" DF-L STAIR TREAD,

TYP. ATTACH TO STAIR STRINGER

WITH (2) 5/16" Ø X 7" GRK RSS

SCREWS (OR APPROVED EQUAL)

AT EACH CONNECTION, TYP.

PT 6X18 DF-L

STAIR STRINGER.

STAIR TREAD DETAIL

NOT TO SCALE

(3) X 5/16" Ø X 7" GRK RSS SCREWS (OR

APPROVED EQUAL) AT EACH BACKWALL

TO GLULAM BEAM CONNECTION.

(2) 5/8" Ø X 6" HEX BOLTS THRU 4X12 BACKWALL PLANK WITH

HEX NUTS AND (1) STD. WASHER & (1) M.I. WASHER, TYP.

(2) 5/8" Ø X 8" HEX BOLTS WITH HEX NUTS AND (1) STD.

WASHER & (1) M.I. WASHER, TYP.

5 1/8" X 24" GLULAM BEAM, TYP.

4X6 RAIL POST BLOCK, TYP.

PT 4X12 DF-L

STAIR TREAD

PLANK

4X12 X 4'-6" PT DF-L BACKWALL (RIP

BOTTOM PLANK TO FIT)

STAIR STRINGER TO SUPERSTRUCTURE CONNECTION

NOT TO SCALE

4X6 STAIR RAIL POST, TYP.

PT 6X18 DF-L STAIR STRINGER

(2) 5/8" Ø X 6" HEX BOLTS THRU 4X12 BACKWALL PLANK WITH

HEX NUTS AND (1) STD. WASHER & (1) M.I. WASHER, TYP.

(2) 5/8" Ø X 8" HEX BOLTS WITH HEX NUTS AND (1) STD.

WASHER & (1) M.I. WASHER, TYP.

BEARING SHOE, TYP.

CONCRETE SILL

NOTE:

1ST BRIDGE RAIL POST

NOT SHOWN FOR CLARITY

PROJECT NAME

United States Department of Agriculture Forest Service

OFSHEET

9/16" Ø HOLES FOR 1/2" Ø X 6" HEX

BOLTS WITH HEX NUTS AND (1) STD.

WASHER & (1) M.I. WASHER

1 1/2"

L3X4X3/8

1 13/16"

STAIR STRINGER TO SILL

CONNECTION DETAIL

NOT TO SCALE

4"

9/16" Ø HOLES FOR 1/2" Ø X 5" LAG

BOLTS WITH (1) STD. WASHER

1 1/2"

6"

4"

1 13/16"

1 13/16"

STAIR STRINGER TO BACKWALL ANGLE

NOT TO SCALE

2 1/2"

2 1/2"

4"

9"

11/16" Ø, ALL HOLES

L 4" X 4" X 3/8"

STAIR STRINGER TO BACKWALL

ANGLE: L4X4X3/8, TYP.

(2) AT EACH STAIR STRINGER

CONNECTION AS SHOWN

(2) X 5/8" Ø X 8" LAG SCREWS AT EACH

INTERIOR STAIR STRINGER CONNECTION.

(LAG INTO BACKWALL PLANK AND

GLULAM BEAM AS SHOWN)