OMS Seismic Retrofit Addendum No. 1 250304-01 - 1.pdf

PDF 4 MB Posted Feb 12, 2025

Attached to: Oliver MS Seismic Retrofit #250304-01
Solicitation number: S-P26028-00012823
Issued by: Multnomah County, Oregon

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Written by GovTribe AI · Mar 17, 2025

This is an Addendum No. One (1) for the Oliver MS Seismic Retrofit Project (#250304-01) issued by the Centennial School District in Portland, Oregon. The addendum, dated February 26, 2025, confirms the bid due date remains unchanged at Tuesday, March 4, 2025, at 3:00 PM. The document includes a record of attendance from a non-mandatory pre-bid conference, a pre-bid meeting agenda, and confirms the availability of an asbestos report. The project involves a seismic retrofit of Oliver Middle School, with the owner planning asbestos abatement from 6/16-6/30.

The project's estimated base bid is $1,900,000, with work scheduled to commence after school board approval on 3/12/25 and a notice to proceed issued on 3/18/25. Site mobilization is planned for 6/17/25, with different zones (cafeteria, classrooms, media center, and front office suite) having specific work and substantial completion dates between 6/17/25 and 8/22/25. The project will be a public works contract requiring compliance with Oregon prevailing wage requirements. Building permit fees will be procured and paid by the district, while trade permit fees will be the responsibility of the general contractor's subcontractors.

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Oliver Middle School Seismic Retrofit - Bid and Permit Set - reduced.pdf	PDF	Feb 12, 2025
20252042_A1_Attachment G_PreBid Access Points with Gate Codes~1.pdf	PDF	Feb 12, 2025
Oliver MS Seismic Retrofit - Project Manual.pdf	PDF	Feb 12, 2025
OMS Seismic Retrofit Addendum No. 2 - 250401-01.pdf	PDF	Feb 12, 2025

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OLIVER ME SEISMIC RETROFIT

PROJECT NO. 250304-01

February 26, 2025

ADDENDUM NO. ONE (1)

THE FOLLOWING CHANGES, ADDITIONS, AND DELETIONS TO THE CONTRACT DOCUMENTS

DATED FEBRUARY 26, 2025, HEREBY BECOME A PART OF THE CONTRACT DOCUMENTS, PER

THE ORIGINAL CONTRACT DOCUMENTS DATED FEBRUARY 12, 2025.

NOTIFY ALL SUBCONTRACTORS AFFECTED BY THIS ADDENDUM.

BID DUE UNCHANGED: Tuesday, March 4, 2025, 3:00 PM

SPECIFICATIONS

1. NO SPECIFICATIONS IN THIS ADDENDUM

DRAWINGS

1. NO DRAWINGS IN THIS ADDENDUM

GENERAL INFORMATION

1. Record of Attendance of the non-mandatory Pre-Bid conference attached.

2. The pre-bid meeting agenda as discussed at the pre-bid is attached.

3. QUESTION: Is there an asbestos report?

a. ANSWER: Yes, this is attached. Any necessary abatement will be accomplished 6/16-6/30 by the owner.

Attachments General Information:

Pre-Bid Record of Attendance Pre-Bid Meeting Agenda Asbestos Report

END OF ADDENDUM ONE (1)

NON-MANDATORY PRE-BID MEETING AGENDA

ITEM # DESCRIPTION

1.0 Team Introductions

2.0 Non-Mandatory Pre-Bid meeting - Record of Attendance

3.0 Future Site Visit:

3.1 Contact Scott Rose, scott@randcmanagement.com to schedule future site visits.

4.0 Request for Bids / Bid Dates

4.1 Bids Due 3:00 PM March 4, 2025

4.2 Substitution Requests

4.2.1 Send to scott@randcmanagement.com

4.2.2 Submit any substitution requests by end of day February 24, 2025, per Instructions to

Bidders.

4.2.3 See specification section 01 6000 - PRODUCT REQUIREMENTS AND

SUBSTITUTION for substitution requirements/procedures.

4.2.4 Substitution request need to be filled out on the Substitution Request form available in section 01 6325 of the specifications.

4.3 Any Questions / RFI’s .

4.3.1 Send to scott@randcmanagment.com

4.3.2 Submit any questions/RFI requests by end of day February 24, 2025

4.3.3 First Addendum will be issued February 26, 2025, that will include record of attendance, pre-bid agenda and city comments.

4.3 Location Bids Due

To: Centennial School District By U.S. Mail:

Centennial School District District Office – Bid #250304-01 18135 SE Brooklyn Street Portland, OR 97236

CENTENNIAL SCHOOL DISTRICT

Project #250304-01 Oliver MS Seismic Retrofit Project Pre-Bid Meeting

Date of Meeting: 2/18/25 @ 4:00 PM Location of Meeting:

Oliver Middle School

15840 SE Taylor St, Portland, OR 97233

By hand delivery:

Centennial School District 18135 SE Brooklyn Street Portland, OR 97236 District Office Bid #250304-01

5.0 Construction Schedule (See Spec 00 72 10 – Additional Conditions section 1.03 Schedule of work)

The General Contractor shall include the following anticipated date constraints for the Work.

1. School Board Approval of the Agreement. 3/12/25

2. Issuance of the Notice to Proceed. 3/18/25

3. Site available for Contractor mobilization. 6/17/25 with work in zones as follows:

• Cafeteria: 6/17/25

• Classrooms: 6/17/25

• Media Center: 6/23/25

• Front Office Suite: 6/30/25

4. Agency Release of the Permit 6/1/25

5. Date of Substantial Completion. 8/22/25

• Cafeteria: 8/22/25

• Classrooms: 8/22/25

• Media Center: 8/15/25

• Front Office Suite: 8/8/25

6.0 Bid Form Section 00 41 00

6.1 Base Bid Complete Project, Expected bid of $1,900,000.

6.2 Bid Bond requirements – see instruction to bidders.

6.3 Performance / Payment bonds provided with signed contract – see instruction to bidders.

7.0 Agreement / General Conditions

7.1 Agreement between CSD and Contractor. Public Works contract.

8.0 Prevailing Wage

8.1 Must comply with State of Oregon prevailing wage requirements.

9.0 Jobsite / Site Logistics

9.1 Work hours-comply with City regulations.

9.2 Site laydown areas within the limits of the site.

10.0 Permits/Fees

10.1 Building permit fees – Procured and paid by District.

10.2 Trade permits fees – Procured paid by GC’s subcontractors.

10.3 Status – Under review with City.

10.4 Owner shall provide Special Inspections as needed.

11.0 Summary of Work

11.1 Scope of work.

12.0 Questions

6032 N. Cutter Circle, Suite 480

Portland, OR 97217 phone: 503.289.1778 intertek.com/building psiusa.com

November 1, 2024

Centennial School District 18135 SE Brooklyn Street Portland, OR 97236 c/o Dan Bodell Senior Project Manager R&C Management Group LLC 360-909-3210– cell Dan@randcmanagement.com

Re: Report of Existing Materials Testing Harold Oliver Middle School – Existing Materials Testing Addendum 1

15840 SE Taylor Road, Portland, Oregon 97233 PSI Project # 07023229

Dear Mr. Bodell:

Professional Service Industries, Inc., (PSI) an Intertek company, is pleased to submit this addendum report of construction materials testing services for the above referenced project. Please reference our original report dated May 28, 2024 for more information.

Scope of Work

PSI performed existing materials testing in general accordance with the testing requirements requested by ZCS Engineering and Architecture as shown in their Material Testing Plan V3. Work consisted of GPR survey, existing material sampling and testing of concrete, reinforcing steel, and brick and CMU masonry. We understand the requested services are to determine the material properties in advance of a seismic retrofit.

Specific Services Included:

• GPR mapping of existing reinforcing steel at the concrete diaphragm and CMU wall locations.

• Two core samples were extracted from the concrete diaphragm and tested in general accordance with ASTM C39 and C42.

• One CMU masonry prism sample was extracted and tested in general accordance with ASTM C1532 and C1314.

• Removal and testing of two reinforcing steel samples from the concrete deck location in general accordance with ASTM A370. Reinforcing steel sample locations were spliced with couplers.

• Performed Flexural Bond Strength Testing of exterior brick masonry walls at five locations in general accordance with ASTM C1072 modified for in situ testing using the bond wrench method.

Centennial School District Professional Service Industries, Inc.

Harold Oliver Middle School- Existing Materials Testing Addendum 1 Engineering • Consulting • Testing

PSI Project No. 07023229 11/1/2024

• Sampling locations at concrete deck and the CMU wall were patched with US Spec concrete products.

• Test locations at exterior brick walls were patched with brick and mortar.

• Document and report visible conditions and nature of materials and connections in the aforementioned locations.

FINDINGS

Below is a general summary of findings for the concrete and CMU masonry and brick masonry structural elements. The sampling location drawings and photographs attached as referenced contain additional location specific information.

Mezzanine Concrete Diaphragm

As requested, the existing mezzanine concrete diaphragm was scanned at the location shown on the attached sampling plan. GPR results indicated existing concrete deck was approximately 5-1/2 inches thick and reinforced with a single mat spaced approximately 12” on center each way. Reinforcing steel exposed at sample locations consisted of #5 deformed bars at a depth of 4 to 4-1/2” below top of slab. PSI collected two cores for compressive strength testing and reinforcing steel samples for tensile strength testing. See attached test results.

Interior CMU Wall

As requested, an existing CMU wall was scanned at the location shown on the attached sampling plan. Based on GPR results, CMU wall was nominally 8-inches thick and appeared to be partially grouted in cells containing vertical reinforcing. Vertical reinforcing was exposed at one location by chipping away face shell and grout and was visually observed to consist of a single #4 deformed bar.

Horizontal joint reinforcement was also encountered at the CMU sample location. PSI collected a hollow masonry prism sample for compressive strength testing. See attached test results.

Exterior Brick Walls

As requested, PSI performed flexural bond strength testing of the exterior brick walls using bond wrench for in situ testing at the locations shown on the attached sampling plan. See attached results for the requested in situ bond wrench flexural strength testing.

Visual Appearance

Visual appearance of existing concrete mezzanine diaphragm and interior CMU wall and exterior brick walls appeared normal at the test locations, with exception of cracking observed at the mezzanine floor concrete diaphragm as shown on the attached sample description photos.

LIMITATIONS

Interpretations are based on standard test methods, specification and our experience evaluating masonry and reinforcing steel materials. Services performed for this project have been conducted with the level of care and skill ordinarily exercised by members of the profession currently practicing in this area under similar budget and time constraints. The report was prepared for the sole use of the Centennial District and ZCS. Reports may not be reproduced, except in full without the written permission by PSI. No warranty, expressed or implied, is made.

Centennial School District Professional Service Industries, Inc.

Harold Oliver Middle School- Existing Materials Testing Addendum 1 Engineering • Consulting • Testing

PSI Project No. 07023229 11/1/2024

We trust this information is sufficient for your present needs. Please don’t hesitate to contact the undersigned if you have any questions or comments.

Respectfully submitted, Professional Service Industries, Inc.

Mike Kath, PE Bethina Barboza Wilbur Principal Consultant Department Manager Construction Services Construction Services mike.kath@intertek.com bethina.barbozawilbur@intertek.com

(503) 369-2003 (503) 961-9518

Attachments: GPR Test and Sample Location Map GPR Location and Sample Descriptions Reinforcing Steel Tensile Strength Results Concrete Core Compressive Strength Results

CMU Prism Compressive Strength Results Brick Flexural Bond Strength Results mailto:mike.kath@intertek.com

GPR Test and Sample Location Map

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EricOstapenko Rectangle

EricOstapenko Text Box A) SCAN LENGTH PER PLAN X STORY HEIGHT +/- SECTION OF CMU WALL TO DETERMINE REINFORCEMENT BAR LAYOUT. INCLUDE EDGE OF AN OPENING OR A CORNER. SCANS CAN BE DONE AT EXTERIOR WHERE IS REQUIRED DUE TO INTERIOR CONDITIONS (1 LOCATION TOTAL)

B) TEST CMU STRENGTH (PRISM TEST). EXTRACT FROM 4' MIN. AWAY FROM WALL EDGES AND CORNERS. DO NOT CUT REINFORCEMENT. REPAIR WITH BLOCK TO MATCH EXISTING. (1 TEST TOTAL).

D) EXPOSE RE-BAR JUST ENOUGH TO DETERMINE ITS SIZE VISUALLY, HORIZONTAL AND VERTICAL REINFORCEMENT. REMOVE CMU MATERIAL TO CREATE A PRISMATIC HOLE, SO THAT HE PATCH MATERIAL DOESN'T EASILY FALL AWAY WITH TIME. PATCH WITH 5000PSI GROUT. FINISH TO MATCH EXISTING. LOCATIONS NOTED PER PLAN (1 LOCATION TOTAL)

EricOstapenko Line

EricOstapenko PolyLine

EricOstapenko Text Box

CMU TEST NOTES

EricOstapenko Text Box

(A) REMOVE BRICK AS NECESSARY FOR FLEXURAL TENSILE STRENGTH TEST PER ASTM C1072. PERFORM TEST IN SITU USING THE BOND WRENCH METHOD. PERFORM 4' MIN. AWAY FROM WALL EDGES AND CORNERS. REPAIR WITH BRICK TO MATCH EXISTING. (5 TESTS TOTAL)

EricOstapenko Text Box

BRICK TEST NOTES

EricOstapenko Callout

- FLEXURAL TENSILE STRENGTH TEST AT THIS LOCATION (1 TEST)

EricOstapenko Callout

- FLEXURAL TENSILE STRENGTH TEST AT THIS LOCATION (1 TESTS)

EricOstapenko Callout

- FLEXURAL TENSILE STRENGTH TEST AT THIS LOCATION (1 TEST)

EricOstapenko Line

EricOstapenko Text Box

INDICATES CONCRETE WALLS

INDICATES BRICK WALLS

INDICATES CMU WALLS

INDICATES EXTENT OF SCAN

EricOstapenko Text Box

LEGEND

EricOstapenko Highlight

EricOstapenko Callout

- FLEXURAL TENSILE STRENGTH TEST AT THIS LOCATION 1 TESTS)

EricOstapenko Callout

- FLEXURAL TENSILE STRENGTH TEST AT THIS LOCATION (1 TEST)

EricOstapenko Highlight

EricOstapenko PolyLine

EricOstapenko PolyLine skylerl Highlight skylerl Highlight skylerl Callout

- SCAN REBAR AT THIS LOCATION (1 TEST)

- REMOVE CMU SAMPLE FOR COMPRESSION TEST (1 TESTS)

-EXPOSE REBAR FOR VISUAL INSPECTION

skylerl Line skylerl Length Measurement 8'-0" skylerl Area Measurement 180 sf skylerl Callout

(E) CONCRETE DIAPHRAGM

skylerl Callout Scan re-bar at concrete diaphragm location (1 scan)

Remove concrete cylinder for compression test (2-tests) at concrete diaphragm. Test to be taking no closer than 4' from one another.

(2) Re-bar samped to be removed, tested, and bar size to be visually verified if re-bar exists skylerl Area Measurement 180 sf skylerl Callout

(E) CONCRETE DIAPHRAGM

skylerl Text Box

(A) SCAN 8' x 8' AREA OF CONCRETE DIAPHRAGM TO DETERMINE REINFORCEMENT SPACING. INCLUDE EDGE OF DIAPHRAGM (1 LOCATIONS)

(B) REMOVE CONCRETE CYLINDER FOR COMPRESSION TEST. EXTRACT A SMAPLE A MINIMUM 2'-0" FROM EDGE OF DIAPHRAGM OR OPENING. FILL CORE HOLE WITH 5000 PSF NON-SHRINK GROUT (2 TESTS TOTAL).

(C) EXPOSE REBAR JUST ENOUGHT TO REMOVE AND DETERMINE REBAR SIZE AND FOR TENSIONS TEST. INSTALL REBAR WITH SPLICES AND FILL HOLE WITH 5000 PSF NON-SHIRNK GROUT (2 TESTS TOTAL).

skylerl Text Box

CONCRETE TEST NOTES

skylerl Highlight skylerl Highlight skylerl Highlight skylerl Highlight skylerl Highlight skylerl Dimension 8'-0" skylerl Dimension 8'-0"

914738 Callout Brick Flex Bond Strength Test Location: BW-5 (in-situ bond wrench method)

914738 Callout Brick Flex Bond Strength Test Location: BW-2 (in-situ bond wrench method)

914738 Callout Brick Flex Bond Strength Test Location: BW-1 (in-situ bond wrench method)

914738 Callout Brick Flex Bond Strength Test Location: BW-4 (in-situ bond wrench method)

914738 Callout Brick Flex Bond Strength Test Location: BW-3 (in-situ bond wrench method)

914738 Image

914738 Callout Location: GPR-1 Interior Masonry Wall

CMU Prism Sample: 07023229-15-C1

914738 Callout Location: GPR-2 Mezzanine Concrete Deck

Concrete Core Samples: 07023229-14-C1\1 and 2

Rebar Samples: R1 and R2

GPR Location and Sample Descriptions

914738 Image

914738 Text Box Map Location: GPR-1 CMU Wall Location

914738 Polygon

914738 Line

914738 Polygon

914738 Line

914738 Callout 8" CMU Wall Partially Grouted at Vertical reinforcing at locations.

914738 Callout Horizontal Joint Reinforcement (1/8" Diameter Wires)

914738 Line

914738 Image

914738 Arrow

914738 Callout #4 Vertical Reinforcing Steel Exposed after chipping away face shell and grout.

914738 Callout 8" Hollow CMU Prism Sample Location

Image

914738 Text Box Map Location: GPR-2 Mezzanine Concrete Diaphragm

Image

914738 Callout #5 Reinforcing Steel Sample Location: R2

914738 Callout Concrete Core Location:

07023249-14-C1\1

914738 Callout Concrete Core Location:

07023249-14-C2\1

914738 Callout #5 Reinforcing Steel Sample Location: R1

914738 Callout 5.5" Concrete Deck Single Layer of #5 Reinforcing Steel spaced approx. 12" OC each way.

914738

Cracking Observed

Reinforcing Steel Tensile Strength Results

ASTM A370

October 02, 2024, Project Number: 07023229 Test Report Number: 07023229-16

Mr. Mike Kath Intertek / PSI

6032 N. Cutter Circle Portland, OR 97217

Re: Tensile Strength Tests conducted on Two (2) Rebar Test Samples submitted on September 12, 2024.

Items: Qty (2) Rebar

Heat Number: #5 R1,R2

Test Method: ASTM A370

Informational Purposes Only

Rebar

Test ID Stress

Area, Sq.

Yield Strength, lbs.

Yield Strength, psi

Tensile Strength, lbs.

Tensile Strength, psi

R1(#5) 0.3100

14,819 47,803 23,280 75,096

R2(#5) 0.3100

15,452 49,755 15,629 50,417

We appreciate the opportunity to be of service to you. Should you have any questions regarding the contents of the report or if we may be of further assistance in any way, please contact us at (503) 289-1778 or e-mail bobby.johnson@intertek.com

Sincerely, Bobby Johnson Laboratory Supervisor, Mechanical Testing & NDE Services

Services performed for this project have been conducted with that level of care and skill ordinarily exercised by members of the profession currently practicing in this area under similar budget and time restraints. No warranty, expressed or implied, is made. The included test results apply only to the specific samples tested and may not represent the entire product. Simple acceptance applies for Pass/Fail results. Reports may not be reproduced, except in full, without written permission of

PSI.

g:\689\projects\2024\ Desktop\Reports\1002-REBAR MIKE KATH mailto:bobby.johnson@intertek.com

Concrete Core Compressive Strength Results

ASTM C42

Sample Details Sample ID: 07023229-14-C1 Date Cored: 8/26/2024 Date Received: 8/29/2024 Time Cored:

General Location: Existing Mezzanine Concrete Diaphragm - Core Samples Location: See sample location map Compressive Strength of Concrete Cores ASTM C 42 Specimen ID 07023229-14-C1\1 07023229-14-C1\1 Date Tested 10/25/2024 10/25/2024 Time Tested Diameter (in) 2.77 2.77 Drilled Length (in) 4.25 4.25 Uncapped Length (in) 3.70 3.70 Capped Length (in) 3.85 3.85 L/D 1.39 1.39 Correction Factor 0.95 0.95 Area (in²) 6.03 6.03 Density (lb/ft³) Type of Cap B B Maximum Load (lbf) 17899 17899 Fracture Type/Remarks 1 1 Compressive Strength (psi) 2970 2970 Corrected Compressive Strength (psi) 2820 2820

Specimen ID 07023229-14-C1\1 07023229-14-C1\2 Date Tested 10/25/2024 10/25/2024 Time Tested Diameter (in) 2.77 2.77 Drilled Length (in) 4.25 6.25 Uncapped Length (in) 3.70 5.70 Capped Length (in) 3.85 5.80 L/D 1.39 2.09 Correction Factor 0.95 1.00 Area (in²) 6.03 6.03 Density (lb/ft³) Type of Cap B B Maximum Load (lbf) 17899 10335 Fracture Type/Remarks 1 2 Compressive Strength (psi) 2970 1710 Corrected Compressive Strength (psi) 2820 1710 Average Compressive Strength (psi): 2270

Required Strength (psi):

Drilled Core Concrete Report

Professional Service Industries, Inc.

6032 N. Cutter Circle, Suite 480 Portland, OR 97217 Phone: (503) 289-1778 Fax: (503) 289-1918

Project: OLIVER MS EXISTING MATERIALS

PORTLAND, OR

Client: CENTENNIAL SCHOOL DISTRICT 28J

18135 SE BROOKLY STREET

PORTLAND, OR 97236

Approved Signatory: Mike Kath (Special Project Manager) 10/31/2024Date of Issue:

CC:

CCB No. 176269 These test results apply only to the specific locations and materials noted and may not represent any other locations or elevations. This report may not be reproduced, except in full, without written permission by Professional Service Industries, Inc. If a non-compliance appears on this report, to the extent that the reported non-compliance impacts the project, the resolution is outside the PSI scope of engagement. Tests and inspections are considered to be simple acceptance criteria

Report No: CC:07023229-14-C1 Issue No: 1

Fracture Type: 1 = Cones on both ends; C1314: Conical Break, 2 = Vert crack/ cone opposite end;

C1314: Cone & Shear

Notes Remarks

1. Capping: B = Bonded ASTM 617,U = Unbonded ASTM C 1231

Hollow Masonry (CMU) Prism Compressive Strength Results

ASTM C1314

Mix Data Mix Submitted By:

Supplier:

Plant:

Mix Identification:

Specified Design Strength (psi):

Design Unit Weight (pcf):

Water Cement Ratio (lb/lb):

Material Source Amount Moisture

Sample Details Date Sampled: 08/27/24 Date Received: 08/29/24 General Location: Conference Room / Bathroom Existing CMU Wall at GPR 1

Location (see attached map and sample location photos) Sample Location: 8" CMU Hollow Prism Feature:

Curing Method:

Initial Cure Temp (°F) High:

Low:

Contractor:

Ticket no.: Truck No.:

Sampled By: Mike Kath Weather:

Est. Wind (mph): Est. Rh (%):

Specification: Mix Design Measured Specified Slump (in): ASTM C 143 N/A Slump w/ plasticizer (in): N/A Air Temp (°F): N/A Concrete Temp (°F): ASTM C 1064 N/A Air Content (%) ASTM C 231 N/A Unit Weight (pcf): ASTM C 138 N/A Volume of Density Measure (ft³): N/A Batch Size (yd³): Time Batched:

Yd³ Placed: Time Sampled:

Total Concrete Placed (yd³): Water Added (gal) Before:

Time Placed: After:

Time in Truck (mins):

Compressive Strength of Hollow Masonry Prisms ASTM C 1314 Specimen ID Date Tested Width

(in) Length

(in) Height

(in) h/t

Ratio Percentage

Out of Plumb Net Area (in²) Maximum

Load (lbf) Fracture

Type / Remarks

Net Strength (psi)

07023229-15-C1\1 10/25/24 8.00 7.81 15.36 1.97 32.34 49030 2 1520 Average Net Strength (psi)

Required Strength (psi)

Masonry Test Report

Professional Service Industries, Inc.

6032 N. Cutter Circle, Suite 480 Portland, OR 97217 Phone: (503) 289-1778 Fax: (503) 289-1918

Project: OLIVER MS EXISTING MATERIALS

PORTLAND, OR

Client: CENTENNIAL SCHOOL DISTRICT 28J

18135 SE BROOKLY STREET

PORTLAND, OR 97236

Approved Signatory: Mike Kath (Special Project Manager) 11/1/2024Date of Issue:

CC:

Report No: CTR:07023229-15-C1 Issue No: 1

Fracture Type: 2 = Vert crack/ cone opposite end; C1314: Cone & Shear Notes Remarks

Flexural Bond Strength of Masonry Results

Text Box ASTM C1072 (Modified for In Situ Field Testing)

Project Name: Test Date:

Maryam Abdelqader/ Mike Kath

Test Location: Description:

P = maximum applied load, lb

= center to centriod load arm, inL =center to load pt, in

* BW4 Test: The failure plane extended to the mortar bed of the underlying brick see attached photos.

d = depth of specimen, in = weight of loading arm, lb

= gross area flexural tesile strength, psi b = width of specimen, in

12616.613.25 219.611.5 3.5 2.5

13.25 217.6 125

16.6

13.25 83.211.5

11.5

3.5

2.5

13.25 46.6 28

16.6

13.25 94.811.5

11.5

3.5

2.5

BW5

BW2

BW1

BW4

BW3

Sample ID (in) (lbs) (psi) (lbs)b (in) d (in) (in)

Flexural Bond Strength - Solid Masonry Units ASTM 1072 (modified for in situ testing using bond wrench)

Oliver Middle School Existing Mat.

See Attached Map

8/23/2024

Exterior brick wall

Work Order: 07023229-13Project Number: 7023229

Tested By:

6 𝑃𝐿 +

𝑏𝑑2

𝑃𝑙

𝑃𝑙 𝐿𝑙

𝐹𝑔

𝐿𝑙

𝑃𝑙 𝑃⬚ 𝐹𝑔𝐿𝑙 𝐿⬚

Text Box Brick Flex Bond Strength (in-situ bond wrench method)

Test Location: BW-1 (See Map)

914738 Image

914738 Callout Bond Wrench Test at 15th Course

914738 Image

914738 Callout Brick Failure Surface

914738 Image

914738

Wall Failure Surface

Text Box Brick Flex Bond Strength (in-situ bond wrench method)

Test Location: BW-2 (See Map)

914738 Image

914738 Callout Bond Wrench Test at 14th Course

914738 Callout Wall Failure Surface

914738

Brick Failure Surface

Text Box Brick Flex Bond Strength (in-situ bond wrench method)

Test Location: BW-3 (See Map)

914738 Image

914738 Callout Bond Wrench Test at 14th Course

914738 Image

914738 Callout Brick Failure Surface

914738

Wall Failure Surface

Text Box Brick Flex Bond Strength (in-situ bond wrench method)

Test Location: BW-4 (See Map)

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914738 Callout Bond Wrench Test at 13th Course

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914738 Callout Wall Failure Surface

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Brick Failure Surface (extended to the mortar joint of the underlying coarse)

Text Box Brick Flex Bond Strength (in-situ bond wrench method)

Test Location: BW-5 (See Map)

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914738 Callout Brick Failure Surface

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914738 Callout Wall Failure Surface

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Bond Wrench Test at 16th Course

Addendum No. 1 - 250304-01

ROA

2025.02.18 Oliver Seismic - Pre-Bid Agenda

07023229 Oliver Middle School Seismic Retrofit - Existing Materiarls Testing Addendum 1

File details come from the government source that posted it. Updated Mar 17, 2025.