EXHIBIT-A_P2978-24 John Wetten.Seismic Evaluation Report.pdf
PDF 19 MB Posted
- Attached to
- A&E Seismic upgrade
- Solicitation number
- S-P03001-00014695
- Issued by
- Clackamas County, Garibaldi City, Oregon
About this file
This document is a Structural Seismic Evaluation Report prepared by ZCS Engineering & Architecture for the Gladstone School District 115, focusing on the John Wetten Elementary School Gymnasium located at 250 E Exeter St, Gladstone, OR 97027. The report details a comprehensive seismic assessment of the original 1958 gymnasium building, which is classified as a W2 (Wood Frames, Commercial and Industrial) and URM (Unreinforced Masonry Bearing Walls) structure. The evaluation was conducted using ASCE 41-17 standards to determine the building's seismic performance and identify necessary retrofit measures to meet immediate occupancy and life safety performance levels.
The total project cost is estimated at $2,598,905.00, with $98,905.00 in match funds and $2,500,000.00 requested from the Seismic Rehabilitation Grant Program (SRGP). The cost breakdown includes $1,923,300.00 for construction, $308,900.00 for engineering, $62,700.00 for construction management, and $276,405.00 for contingency. The site is located in a liquefaction hazard area, which significantly impacts the retrofit design and contributes to the higher-than-average construction costs. The evaluation identified multiple structural and nonstructural deficiencies, including inadequate load paths, insufficient wall anchoring, and potential seismic vulnerabilities that require comprehensive retrofitting to ensure the building's safety and resilience during a seismic event.
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Other files
| File | Type | Posted |
|---|---|---|
| JWE SRGPENGINEERING SER_RFP.pdf | ||
| List of Offerors RFQ S-W912JV25C3003.pdf |
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Text version
Exhibit A - Structural Seismic Evaluation Report (including Preliminary Rehabilitation Drawings) prepared by ZCS– John Wetten Elementary School Gym Seismic Rehabilitation
G0.0
COVER SHEET
JOHN WETTEN ELEMENTARY SCHOOL GYM SEISMIC RETROFIT
PRELIMINARY DESIGN
GLADSTONE SCHOOL DISTRICT 115
250 E EXETER STREET
GLADSTONE, OR 97027
STRUCTURAL REPAIRS:
S1. PROVIDE A COMPLETE, WELL-DEFINED LOAD PATH
BY INSTALLING NEW ELEMENTS AND CONNECTIONS
AS NEEDED TO TRANSFER INERTIAL FORCES FROM
ALL ELEMENTS OF THE BUILDING TO THE
FOUNDATION.
- IN-PLANE DIAPHRAGM CONNECTIONS
S2. PROVIDE SEISMIC ISOLATION JOINT TO AVOID
POUNDING OF THE TALLER STRUCTURE INTO THE
LOWER STRUCTURE. PROVIDE ALL NEW GRAVITY
FRAMING AND LATERAL RESISTING ELEMENTS AS
NECESSARY TO PROVIDE BUILDING SEPARATION.
A. CUT BACK (E) 2x ROOF FRAMING TO CREATE A
NEW SEISMIC ISOLATION GAP. PROVIDE ALL
NECESSARY ARCHITECTURAL JOINT CLOSURES.
B. CONSTRUCT A (N) 2x CONVENTIONAL WOOD
STUD SHEAR WALL. PROVIDE ALL NECESSARY
ROOF CONNECTION AND FOUNDATION
CONNECTION HARDWARE.
C. CONSTRUCT A (N) CONTINUOUS GRADE BEAM
TO SUPPORT THE NEW SHEAR WALL. PROVIDE
(N) PILE CAPS AS NECESSARY.
D. CUT BACK (E) FRAMING TO ENLARGE (E) SEISMIC
GAP CREATED DURING THE 1995 CAFETERIA
RENOVATION. ALL (E) BEARING ELEMENTS TO
REMAIN.
E. CONSTRUCT A (N) STEEL MOMENT FRAME TO
SUPPORT THE 1995 CAFETERIA RENOVATION
ROOF TO BE SEPARATED. PROVIDE NEW PILE
CAPS AND INSTALL NEW DEEP FOUNDATIONS TO
SUPPORT THE NEW MOMENT FRAME.
F. INSTALL NEW WOOD DRAG BEAMS TO CONNECT
ROOF DIAPHRAGM TO NEW MOMENT FRAMES.
S3. ANCHOR THE MEZZANINE TO THE
SEISMIC-FORCE-RESISTING ELEMENTS OF THE MAIN
STRUCTURE AND PROVIDE ADDITIONAL VERTICAL
LATERAL RESISTING ELEMENTS.
A. PROVIDE IN-PLANE ATTACHMENTS AT FLOOR
DIAPHRAGM TO MAIN STRUCTURES'
SEISMIC-FORCE-RESISTING ELEMENTS.
B. INSTALL NEW SHEAR WALLS BELOW
MEZZANINE FLOOR.
S4. PROVIDE DEEP FOUNDATIONS SOLUTIONS. PROVIDE
PILE AND PILE CAPS AS REQUIRED.
S5. INSTALL NEW PLYWOOD SHEATHING ON UPPER HALF
OF EXISTING WALLS TO ENSURE ADEQUATE SHEAR
CAPACITY.
S6. BOLT SHEAR WALL END STUDS TO EXISTING
CONCRETE PILASTERS.
S7. INSTALL NEW PLYWOOD DIAPHRAGM SHEATHING
BELOW THE EXISTING 4x ROOF DECKING.
S8. INSTALL NEW PLYWOOD DIAPHRAGM SHEATHING
BELOW THE EXISTING 4x ROOF DECKING.
S9. INSTALL NEW CONCRETE SHEAR WALLS TO REDUCE
THE SHEAR STRESS IN THE ADJACENT EXISTING
CONCRETE FRAME.
S10. INSTALL NEW CONCRETE SHEAR WALLS TO
REPLACE EXISTING URM WALLS TO MEET FORCE
DEMANDS.
S11. INSTALL NEW OUT-OF-PLANE ANCHORAGE.
S12. INSTALL NEW HARDWARE FOR TRANSFER OF
SEISMIC FORCES FROM DIAPHRAGM TO SHEAR
WALLS.
S13. INSTALL NEW CONCRETE SHEAR WALLS IN-LINE OF
THE EXISTING CONCRETE SHEAR WALLS TO MEET
FORCE DEMAND.
S14. INSTALL NEW CONCRETE SHEAR WALLS TO REDUCE
THE SHEAR WALL ASPECT RATIO.
S15. PROVIDE NEW DRAG ELEMENTS AT REENTRANT
CORNERS.
S16. PROVIDE NEW CONTINUOUS CROSS TIES BETWEEN
DIAPHRAGM CHORDS.
S17. STRENGTHEN EXISTING MASONRY SHEAR WALL
LINES TO MEET SEISMIC FORCE DEMANDS.
A. INSTALL NEW CONCRETE SHEAR WALLS TO
REPLACE EXISTING URM WALLS.
B. INSTALL NEW WOOD FRAMED SHEAR WALLS TO
REPLACE THE EXISTING GYPSUM SHEAR
WALL INFILLS.
S18. REDUCE THE UNSUPPORTED LENGTH OF THE
EXISTING SLENDER URM WALLS.
A. INSTALL NEW STEEL STRONGBACK COLUMNS TO
RESIST OUT-OF-PLANE FORCES.
B. INSTALL NEW STEEL SPANDRELS TO RESIST
OUT-OF-PLANE FORCES.
S19. RETROFIT AND STRENGTHEN BEAMS TO SUPPORT
CODE REQUIRED VERTICAL SEISMIC LOADING.
NON-STRUCTURAL REPAIRS:
N1. REMOVE GLAZING AND REPLACE WITH NEW SAFETY
GLASS WINDOWS SYSTEM.
N2. SEISMICALLY ANCHOR EXISTING CANOPIES TO THE
STRUCTURE.
-OUT-OF-PLANE CONNECTIONS
N3. REMOVE SUSPENDED ITEMS OR ENSURE THAT ITEMS
ARE FREE TO SWING FROM STRUCTURE WITHOUT
DAMAGING THEMSELVES OR ADJOINING
COMPONENTS.
N4. INSTALL BRACING FOR ALL ROUND DUCTS LARGER
THAN 28 IN. IN DIAMETER.
REPAIR KEYNOTES
TRUE/PROJECT
NORTH
*SITE PLAN NOT
TO SCALE
BUILDING KEY PLAN
VICINITY MAP
G0.0 COVER SHEET
S1.1 AREA A FOUNDATION PLAN
S1.2 AREA A MEZZANINE FRAMING PLAN
S2.1 AREA A ROOF FRAMING PLAN
SHEET INDEX
PROJECT
LOCATION
AREA A:
ORIGINAL GYMNASIUM 1958
±9,200 S.F.
IMMEDIATE OCCUPANCY
W2, C2a, & URM
PROJECT NO:
DRAWN:
CHECKED:
DATE:
O N
E
IN
C H
E Q
U
AL
S
FU
LL
S
C
AL
E
GLADSTONE SCHOOL
DISTRICT 115
250 E EXETER STREET,
GLADSTONE, OR 97027
JOHN WETTEN
ELEMENTARY
SCHOOL GYM
SEISMIC RETROFIT
PR
EL
IM
IN
AR
Y
D
ES
IG
N
DEC. 2024
KNT
JRE
P-2978-24
-P
RELIM
IN
ARY-
NOT FOR C
ONSTRUCTIO
N
524 Main Street, Suite 2 Oregon City, OR 97045
503.659.2205
DATE:DESCRIPTION
AREA B:
ORIGINAL CLASSROOM
±16,500 S.F.
NOT IN SCOPE
AREA C:
MUSIC ROOM ADDITION
±5,250 S.F.
NOT IN SCOPE
AREA D:
LIBRARY AND
CLASSROOM ADDITION
±13,000 S.F.
NOT IN SCOPE
AREA E:
1995 ADDITION
±39,000 S.F.
NOT IN SCOPE
AREA E
AREA A FOUNDATION PLAN
NTS
S1.1
CAMPUS KEY
NTS
S1.1
CAMPUS KEY
NTS
S1.1
AREA C
AREA A
AREA D
AREA B
OUT OF SCOPE
OUT OF SCOPE
S4 TYP.
S4 TYP.
S4 TYP.
S4 TYP.
S2C
S9,S17A
S9,S17A
S18A TYP.
S4 TYP.
S4 TYP. S17B TYP.
S4 TYP.
S2B
S3B
S3B
S4 TYP.
S2C
S2E
S4 TYP.S10, S13, S14
S10, S13, S14
O U
T O
F
SC
O
PE
S2C
S2C
S1.1
AREA A FOUNDATION
PLAN
PROJECT NO:
DRAWN:
CHECKED:
DATE:
O N
E
IN
C H
E Q
U
AL
S
FU
LL
S
C
AL
E
GLADSTONE SCHOOL
DISTRICT 115
250 E EXETER STREET,
GLADSTONE, OR 97027
JOHN WETTEN
ELEMENTARY
SCHOOL GYM
SEISMIC RETROFIT
PR
EL
IM
IN
AR
Y
D
ES
IG
N
DEC. 2024
KNT
JRE
P-2978-24
-P
RELIM
IN
ARY-
NOT FOR C
ONSTRUCTIO
N
524 Main Street, Suite 2 Oregon City, OR 97045
503.659.2205
DATE:DESCRIPTION
CAMPUS KEY
NTS
S1.2
CAMPUS KEY
NTS
S1.2
OUT OF SCOPE
OUT OF SCOPE
AREA A CANOPY FRAMING PLAN
NTS
S1.2
AREA A MEZZANINE FRAMING PLAN
NTS
S1.2
OUT OF SCOPE
S3B TYP.
N2 TYP.
S3A TYP.
S3B TYP.
S11, S16
S3A TYP.
S11, S16
S7, S8
AREA E
AREA C
AREA A
AREA D
AREA B
S1.2
AREA A MEZZANINE
FRAMING PLAN
PROJECT NO:
DRAWN:
CHECKED:
DATE:
O N
E
IN
C H
E Q
U
AL
S
FU
LL
S
C
AL
E
GLADSTONE SCHOOL
DISTRICT 115
250 E EXETER STREET,
GLADSTONE, OR 97027
JOHN WETTEN
ELEMENTARY
SCHOOL GYM
SEISMIC RETROFIT
PR
EL
IM
IN
AR
Y
D
ES
IG
N
DEC. 2024
KNT
JRE
P-2978-24
-P
RELIM
IN
ARY-
NOT FOR C
ONSTRUCTIO
N
524 Main Street, Suite 2 Oregon City, OR 97045
AREA A ROOF FRAMING PLAN
NTS
S2.1
CAMPUS KEY
NTS
S2.1
CAMPUS KEY
NTS
S2.1
S1.2
S1.2
S19
S19
S19
S19 S11 TYP.
S5 TYP.
S7, S8
S1, S12
S11 TYP.
S18B TYP.
S18A
S1 TYP.S2AS2B
S6 TYP.
S2A S2B
S10, S13, S14
S18B TYP.
S18B
S18BS9,S17A
S11 TYP.
S1, S12
S15
S15
S10, S13, S14
S11 TYP.
S5
S1 TYP.
S2C
S1 TYP.
S2A
S7, S8
OUT OF SCOPE
OUT OF SCOPE
AREA E
AREA C
AREA A
AREA D
AREA B
S2A,S2B S9,S17A
O U
T O
F
SC
O
PE
S2B
S2E
S2D
S2F
S2F
S1, S12
S11
S11
S2.1
AREA A ROOF
FRAMING PLAN
PROJECT NO:
DRAWN:
CHECKED:
DATE:
O N
E
IN
C H
E Q
U
AL
S
FU
LL
S
C
AL
E
GLADSTONE SCHOOL
DISTRICT 115
250 E EXETER STREET,
GLADSTONE, OR 97027
JOHN WETTEN
ELEMENTARY
SCHOOL GYM
SEISMIC RETROFIT
PR
EL
IM
IN
AR
Y
D
ES
IG
N
DEC. 2024
KNT
JRE
P-2978-24
-P
RELIM
IN
ARY-
NOT FOR C
ONSTRUCTIO
N
524 Main Street, Suite 2 Oregon City, OR 97045
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