A06_Repair_Drawings_0001.pdf
PDF 3 MB Posted
- Attached to
- OR-OREGON ISLANDS NWR - SOUTH STAIRS CON
- Solicitation number
- 140F0321R0007
About this file
This document contains engineering drawings and specifications for repair work on stair structures at the Oregon Islands National Wildlife Refuge. The drawings show existing conditions, recommended improvements including added bracing and structural reinforcement, notes and callouts. Repair work includes replacing corroded beam hangers, adding longitudinal and cross bracing throughout the stair systems, and retrofitting stair stringers to increase bearing surface on landing beams. The related federal contract opportunity is soliciting offers for construction services to implement the recommended repairs and improvements to the south stairs at the Refuge, as detailed in the engineering drawings and specifications. The solicitation was issued by the U.S. Fish and Wildlife Service, with an estimated value over $25,000.
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Text version
EXISTING CROSS BRACING
RECOMMENDED CROSS BRACING:
2x8 PT EA SIDE OF POSTS WITH
BOLTED CONNECTIONS, TYP
8L
8R
7L
7R
6L 6R
5L
5R
4L
4R
3L 3R
1L
1R
BRASS NAMEPLATE
LOCATION AT FWS
MONITORING POINT, TYP.
NOTE THIS LOCATION HAS
THE LARGEST MEASURED
GAP.
SHEET LB-1. RECOMMENDED LONGITUDINAL BRACING TO BE INSTALLED
2L 2R
THIS STAIR RUN
DOES NOT EXIST
*REPLACE CORRODED
BEAM HANGER HERE
*REPLACE CORRODED
BEAM HANGER HERE
*REPLACEMENT HANGERS
SHALL BE STAINLESS STEEL (SS)
WITH SS NAILS AND MATCH
EXISTING THAT APPEAR TO BE
SIMPSON SS HU46 HANGERS
NEW BRACING, SEE
SHEET LB-3 FOR
DETAIL, TYP
project location client by date checke date sheet no.
job no.
COQUILLE STAIR BRACING
PORTLAND, OR
Coffman Engineers
JAB
08/2020
SWH
20028808/2020
(N) SIMPSON A35SS EA SIDE
W/ 0.131" x 1-1/2" SSNA8 NAILS
(N) (2) SIMPSON SDWH271000SS
SCREWS 0.262" DIAx10" LONG
(E) 4x10 STAIR STRINGER
(N) 4x12 PT BEAM BETWEEN
(E) LANDING BEAMS,
RUNNING 2" LONG EA END
(E) 2x10
(E) 4x6 POST
(E) 4x12 LANDING BEAM11 2" 11 2"
(E) GAP
(E) BEARING LENGTH
ADDED BEARING LENGTH
NOTES:
1. THE INTENT OF THIS RETROFIT IS TO INCREASE THE BEARING LENGTH OF THE STAIR STRINGERS
ON THE LANDING BEAMS SO THAT AS THE STAIR SYSTEM CONTINUES TO MOVE, THERE WILL
CONTINUE TO BE SUPPORT OF THE STRINGER OVER A LONGER PERIOD OF TIME.
2. (E) = EXISTING
(N) = NEW
3. (N) 4x12 TO BE PRESSURE TREATED DOUG FIR-LARCH #2
TYPICAL STAIR STRINGER BEARING RETROFIT
SCALE: 1"=1'-0"
SHEET NO:
PROJ. NO.
DRAWN
CHECKED
DATE
200288
PROJECT:
TITLE: TYPICAL STAIR STRINGER BEARING LENGTH RETROFIT
CLIENT: US FISH AND WILDLIFE SERVICE
COQUILLE POINT STAIRWAY EVALUATION CONTRACT ORDER:
www.coffman.com ph 503-552-3800
1355 NW Everett, Suite 100
Portland, OR 97209
3/10/2020
SWH
DFP
S1
140F0719D0007/140F120F0068
OREGON ISLANDS NATIONAL WILDLIFE REFUGE, BANDON, OREGON
LATERAL DESIGN
FIGURE LB-2. RECOMMENDED LONGITUDINAL BRACING TYP ELEVATION
LONGITUDINAL STAIR BRACING
8/12/2020 JAB
NOTE: SEE PLAN FOR EXACT LOCATIONS
LB-2
project location client by date checked date sheet no.
job no.
COQUILLE STAIR BRACING
PORTLAND, OR
Coffman Engineers
JAB
08/2020
SWH
20028808/2020
(N) SIMPSON A35SS EA SIDE
W/ 0.131" x 1-1/2" SSNA8 NAILS
(N) (2) SIMPSON SDWH271000SS
SCREWS 0.262" DIAx10" LONG
(E) 4x10 STAIR STRINGER
(N) 4x12 PT BEAM BETWEEN
(E) LANDING BEAMS,
RUNNING 2" LONG EA END
(E) 2x10
(E) 4x6 POST
(E) 4x12 LANDING BEAM11 2" 11 2"
(E) GAP
(E) BEARING LENGTH
ADDED BEARING LENGTH
NOTES:
1. THE INTENT OF THIS RETROFIT IS TO INCREASE THE BEARING LENGTH OF THE STAIR STRINGERS
ON THE LANDING BEAMS SO THAT AS THE STAIR SYSTEM CONTINUES TO MOVE, THERE WILL
CONTINUE TO BE SUPPORT OF THE STRINGER OVER A LONGER PERIOD OF TIME.
2. (E) = EXISTING
(N) = NEW
3. (N) 4x12 TO BE PRESSURE TREATED DOUG FIR-LARCH #2
TYPICAL STAIR STRINGER BEARING RETROFIT
SCALE: 1"=1'-0"
SHEET NO:
PROJ. NO.
DRAWN
CHECKED
DATE
200288
PROJECT:
TITLE: TYPICAL STAIR STRINGER BEARING LENGTH RETROFIT
CLIENT: US FISH AND WILDLIFE SERVICE
COQUILLE POINT STAIRWAY EVALUATION CONTRACT ORDER:
www.coffman.com ph 503-552-3800
1355 NW Everett, Suite 100
Portland, OR 97209
3/10/2020
SWH
DFP
S1
140F0719D0007/140F120F0068
OREGON ISLANDS NATIONAL WILDLIFE REFUGE, BANDON, OREGON
LONGITUDINAL STAIR BRACING
8/12/2020
JAB
(E) 18" DIA
CONC
FOOTING TYP
(E) 4x6 POST
TYP
2x8 BRACE TYP
5/8" DIA S.S.
CARRIAGE BOLT
W/ WASHERS TYP
2x BLOCKING
2x BLOCKING
STAIR
RAILING
MAX 1/2"
NOTE: ALL SAWN
LUMBER TO BE PT
DOUG FIR - LARCH #2
OR BETTER
2x8 BRACE TYP
4x6 POST TYP
2x BLOCKING
(2) 5/8" DIA S.S.
CARRIAGE BOLT
W/ WASHERS TYP
LB-3
EXISTING SIMPSON CB46
COLUMN BASES W/
(2) 5/8"DIA SS BOLTS
NEW LONGER 5/8" DIA S.S.
BOLTS THROUGH EXISTING
HOLES, TYP
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