Event_4290_-_Specification.pdf

Project Manual: Construction Documents

City of Minneapolis PT Repairs 2026 Minneapolis, Minnesota

Prepared for:

City of Minneapolis Municipal Parking

Event 4290

August 7, 2026

City of Minneapolis PT Repairs Construction Documents 21-005600.06 August 7, 2026

©2026, Walker Consultants. All rights reserved.

Certification Page 00 00 50 - 1

CITY OF MINNEAPOLIS PT REPAIRS 2026

FOR:

City of Minneapolis

BY:

7760 France Avenue South, Suite 820 Minneapolis, MN 55435

Project No: 21-005600-06

I hereby certify that these drawings and specifications were prepared by me or under my supervision and that I am duly licensed Professional Engineer under the laws of the State of Minnesota.

Patrick J. Lewis, P.E., License No. 50914 DATE: August 7, 2026

TABLE OF CONTENTS 00 01 10 - 1

SECTION 00 01 10 – TABLE OF CONTENTS

DIVISION 00 – PROCUREMENT AND CONTRACTING AGREEMENTS

INTRODUCTORY INFORMATION

00 01 10 Table of Contents 00 00 50 Certification Sheet 00 43 00 Unit Price Work Items

DIVISION 01 - GENERAL REQUIREMENTS

01 00 00 Administrative Requirements 01 11 10 Summary of Work – Restoration

DIVISION 02 – EXISTING CONDITIONS

02 00 10 Work Items 02 51 30 General Concrete Surface Preparation 02 51 40 Surface Preparation For Patching

DIVISION 03 – CONCRETE

03 30 21 Cast-in-Place Concrete Restoration 03 37 60 Prepackaged Repair Mortar 03 38 18 Unbonded Post-Tensioning Repairs

DIVISION 07 – THERMAL & MOISTURE PROTECTION

07 30 21 Traffic Coatings 07 92 33 Concrete Joint Sealants 07 95 00 Expansion Joint Assemblies

DIVISION 09 – FINISHES

09 91 21 Pavement Marking – Restoration

END OF TABLE OF CONTENTS

UNIT PRICE WORK ITEMS 00 43 00 - 1

SECTION 00 43 00- Unit Price Work Items

QUOTATION REQUEST

A. Contractor shall perform the work in accordance with the Owner-provided executed contract with the Owner and these Contract Documents.

B. Project consists of providing all materials, labor, equipment, supervision and services to perform post-tension tendon repairs for the 11th & Marquette Parking Ramp, with additional isolated repair locations at Lemington and Minneapolis Convention Center (Plaza), located in Minneapolis, Minnesota. Concrete work associated with the P/T investigation and repairs will be performed by City staff. This includes removal and replacement.

C. Project shall be completed on the basis of Unit Price Work Items identified as follows:

11th and Marquette

WORK

ITEM

DESCRIPTION UNITS QTY. UNIT

PRICE

CALCULATED

EXTENSION

21.0 P/T SYSTEM REPAIR - MONOSTRAND

21.1 Slab P/T Tendon Repair – End to End EA. 40 $

Leamington & Plaza Ramp

WORK

ITEM

DESCRIPTION UNITS QTY. UNIT

PRICE

CALCULATED

EXTENSION

21.0 P/T SYSTEM REPAIR - MONOSTRAND

21.6 Tendon Splice Coupler (Single) EA. 4 $

21.7 Tendon Splice Coupler (Center-Pull) EA. 4 $

21.9 P/T Tendon Material L.F. 550 $

TOTAL $__________

SCHEDULE

• August 24, 2026 City Staff starts concrete removals and Engineer performs post-tension evaluation to identify repair locations.

• September 7, 2026 Working with City staff, Contractor starts performance and coordination of post-tension slab tendon repairs.

• November 20, 2026 Estimated date of Repair Completion

UNIT PRICE WORK ITEMS 00 43 00 - 2

END OF SECTION 00 43 00

© Copyright 2026. All rights reserved. No part of this document may be reproduced in any form or by any means without permission from Walker Consultants.

ADMINISTRATIVE REQUIREMENTS 01 00 00 - 1

SECTION 01 00 00 – ADMINISTRATIVE REQUIREMENTS

1.1 CONTRACTUAL

A. Contractor shall perform the work in accordance with the Owner-provided executed contract with the Owner and these Contract Documents.

B. Project consists of providing all materials, labor, equipment, supervision and services to perform repairs for the City of Minneapolis PT Repairs located in Minneapolis, Minnesota.

1.2 PROJECT MANAGEMENT AND COORDINATION

A. Coordinate construction to ensure efficient and orderly installation of each part of the Work.

B. Conduct progress meetings at Project site at Owners request. Contractor, Owner and Engineer to agree on meeting dates and times. Require attendance of each subcontractor, major supplier or other entity concerned with current progress or involved with planning or coordination of future activities. Contractor shall record minutes and distribute to parties involved, including Owner and Engineer, within 3 working days of the meeting.

1.3 SUBMITTAL PROCEDURES

A. Shop Drawings: Submit Project-specific information drawn to scale. Coordinate each submittal with fabrication, purchasing, testing, delivery, other submittals, and related activities that require sequential activity.

1. No extension of the Contract Time will be authorized because of failure to trans-mit submittals far enough in advance of the Work to allow processing.

2. Engineer will not accept submittals from sources other than Contractor.

3. Engineer will not accept submittals without review and stamp by the Contractor.

4. Identify deviations from the Contract Documents.

5. Submit .pdf via email.

1.4 QUALITY REQUIREMENTS

A. Testing and inspecting services are required to verify compliance with requirements specified or indicated. These services do not relieve Contractor of responsibility for compliance with the Contract Document requirements. Contractor is responsible for scheduling inspections and tests and notifying testing agency.

B. Testing Agency: Owner shall arrange and pay for testing and inspection services.

Testing Agency to be pre-approved by Engineer.

ADMINISTRATIVE REQUIREMENTS 01 00 00 - 2

C. Regulations: Comply with industry standards and applicable laws and regulations of authorities having jurisdiction including, but not limited to, the following:

1. Building Code requirements.

2. Health and safety regulations (OSHA, ANSI).

3. Utility company regulations.

4. Police, Fire Department and Rescue Squad rules.

D. Inspections: Arrange for authorities having jurisdiction to inspect and test each temporary utility before use. Obtain required certifications and permits.

1.5 TEMPORARY FACILITIES AND CONTROLS

A. Use Charges: Contractor shall pay use charges for temporary utilities.

B. Provide field offices, storage trailers, and other support facilities as necessary for the Work.

C. Collect waste daily and, when containers are full, legally dispose of waste off-site.

D. Standards: Comply with ANSI A10.6, NECA's "Temporary Electrical Facilities," and

NFPA 241.

E. Barricades, Warning Signs and Lights: Comply with industry standards, code requirements and applicable laws and regulations of the authorities having jurisdiction for erection of structurally adequate barricades. Provide barriers to prevent vehicles or pedestrians from entering construction work areas. Paint with appropriate colors, and provide graphic signs to inform personnel and public of hazard being protected against.

When appropriate and needed, provide lighting, including red or amber lights.

F. Provide temporary environmental controls as required by authorities having jurisdiction including, but not limited to, erosion and sediment control, dust control, noise control, and pollution control.

G. Heating and Cooling: Provide temporary enclosures and heating and cooling required for curing materials or for protecting installed construction from adverse weather. Use equipment that will not have a harmful effect on workers, completed installations or elements being installed. Direct equipment exhaust away from building air intake locations.

H. Provide temporary fire protection. Comply with NFPA 241.

1.6 PRODUCT REQUIREMENTS

A. Provide products of same kind from a single source. The term "product" includes the terms "material," "equipment," "system," and similar terms.

ADMINISTRATIVE REQUIREMENTS 01 00 00 - 3

B. Deliver, store, and handle products using means and methods that will prevent damage, deterioration, and loss, including theft. Comply with manufacturer's written instructions.

C. Provide products that comply with the Contract Documents, are undamaged, and are new at the time of installation.

1. Provide products complete with accessories, trim, finish, and other devices and components needed for a complete installation and the intended use and effect.

D. Select products to comply with all of the following that are applicable:

1. Where only a single product or manufacturer is named, provide the item indicated. No substitutions will be permitted.

2. Where two or more products or manufacturers are named, provide one of the items indicated. No substitutions will be permitted.

3. Where products are specified by name, accompanied by the term "available products" or "available manufacturers," provide one of the named items or comply with provisions for "comparable product" to obtain approval for use of an unnamed product or manufacturer.

1.7 SELECTIVE DEMOLITION REQUIREMENTS

A. Unless otherwise indicated, demolished materials become Contractor's property.

Remove and dispose of legally from Project site. Do not burn demolished materials.

B. Items indicated to be removed and salvaged remain Owner's property. Remove, clean, and deliver to Owner's designated storage area.

C. Comply with EPA regulations and disposal regulations of authorities having jurisdiction.

D. Conduct demolition without disrupting Owner's use of the building.

E. It is not expected that hazardous materials will be encountered in the Work. If materials suspected of containing hazardous materials are encountered, do not disturb;

immediately notify Engineer and Owner. Hazardous materials will be removed by Owner.

F. Maintain and protect existing utilities to remain in service before proceeding with demolition, providing bypass connections to other parts of the building.

G. Locate, identify, shut off, disconnect, and cap off utility services to be demolished.

H. Conduct demolition operations and remove debris to prevent injury to people and damage to adjacent buildings and site improvements.

I. Provide and maintain shoring, bracing, or structural support to preserve building stability and prevent movement, settlement, or collapse.

J. Protect building structure and interior from weather and water leakage and damage.

ADMINISTRATIVE REQUIREMENTS 01 00 00 - 4

K. Protect walls, ceilings, floors, and exposed finishes that are to remain. Erect and maintain full height dustproof partitions. Cover and protect fixtures, furnishings, and equipment that are to remain.

L. Neatly cut openings and holes plumb, square, and true to dimensions required. Use cutting methods least likely to damage construction to remain or adjoining construction.

M. Promptly patch and repair holes and damaged surfaces of building caused by demolition. Restore exposed finishes of patched areas and extend finish restoration into remaining adjoining construction.

END OF SECTION 01 00 00

SUMMARY OF WORK - RESTORATION 01 11 10 - 1

SECTION 01 11 10 - SUMMARY OF WORK - RESTORATION

PART 1 - GENERAL

1.1 RELATED DOCUMENTS

A. Drawings and general provisions of Contract, including General and Supplementary Conditions and other Division 01 Specification Sections apply to this Section.

1.2 PROJECT DESCRIPTION

A. Work will be performed at locations within the 11th & Marquette, Leamington, and Minneapolis Convention Center (Plaza) parking ramp as shown on Drawings.

B. Project generally is comprised of a limited assessment of slab post-tension tendons at locations shown on Drawings and, where directed by the Engineer, repair of slab post-tension tendons and anchors.

1. Contractor shall be responsible for removal of failed and reinstallation of new tendon, installation of couplers, stressing of tendons and repair of tendon sheathing.

2. City staff will be responsible for traffic closures and traffic control, shoring, barricades and scheduling of work.

3. City staff will perform removal and reinstallation of concrete, traffic coating repair/replacement, related sealant and traffic markings work.

4. Engineer will direct locations of tendons to be repaired.

C. Assessment of slab post-tension tendons at 11th & Marquette will occur at the direction of the Engineer. Locations will include the following:

1. Level 2: Grids A-B/13

2. Level 2: Grids B-D/4

3. Level 2: Grids B-D/13

4. Level 3: Grids B-D/3

5. Level 3: Grids B-D/13

6. Level 4: Grids A-B/12

7. Level 4: Grids B-D/3

8. Level 4: Grids B-D/13

9. Level 5: Grids A-B/4

10. Level 5: Grids B-D/13

D. Tendon repair will be from end to end at 11th & Marquette facility, refer to diagram of approximate extents on Sheet R-102. Partial repairs may be completed at other facilities.

E. Owner and/or Engineer/Architect reserves right to increase or decrease quantities at same unit cost, as required by job conditions.

SUMMARY OF WORK - RESTORATION 01 11 10 - 2

F. Work Item specifications and details shall govern all repair operations. Locations where Work Items apply are shown on Drawings as symbols.

G. Final payment shall be made on basis of actual approved Work performed as measured in place.

1.3 MEASUREMENTS

A. Before ordering any material or doing any Work, Contractor shall verify all measurements at Project site and shall be responsible for correctness of same.

B. Before proceeding with each Work Item, Contractor shall locate, mark, and measure quantity of each item and report quantities to Engineer/Architect. If measured quantities exceed Engineer/Architect's estimate, Contractor shall obtain written authorization to proceed from Owner before executing Work required for that Work Item.

C. Measurement of quantities for individual Work Items will be performed by Contractor and reviewed by Engineer/Architect. Coordinate measurements with inspection as required in Section "Project Management and Coordination."

D. Cost of Work included in each Work Item for quantities as indicated in Contract Documents shall be included in Base Bid.

1. Additions to or deductions from lump sum price for quantities of each Work Item added to or deducted from Work respectively shall be at unit prices indicated in Bid Form and shall constitute payment or deductions in full for all material, equipment, labor, supervision and incidentals necessary to complete Work.

1.4 WORK SEQUENCE

A. Prior to commencement of work, meet with Engineer/Architect and Owner representatives to establish sequence and schedule of Work. Contractor shall give Owner notice of areas to be cleared of cars at least 2 working days in advance of actual Work.

B. Contractor shall notify Owner's representative at least 24 hr prior to beginning any abrasive blasting operations.

C. Contractor shall remove all broken concrete and debris from Work area on daily basis and dispose of same at authorized dump sites.

D. Contractor shall remove dust and air transported sand/debris from remainder of facility at conclusion of operations in Work area.

E. Contractor shall abide by all City noise and Work ordinances.

1.5 CONTRACTOR USE OF PREMISES

SUMMARY OF WORK - RESTORATION 01 11 10 - 3

A. General: Limit use of premises to construction activities in areas indicated; allow for Owner occupancy and use by public.

1. Confine operations to areas within Contract limits indicated. Portions of the site beyond areas in which construction operations are indicated are not to be disturbed.

2. Coordinate all parking closures with Owner and Parking Staff.

3. Keep driveways and entrances serving the premises clear and available to the

Owner and Owner's employees at all times. Do not use these areas for parking or storage of materials. Schedule deliveries to minimize space and time requirements for storage of materials and equipment on site.

4. The Owner or their Agent(s) will be responsible to clear work phase area of vehicles. Contractor shall work in unison with the clearing operation to capture necessary the areas by incrementally installing barricades to prevent vehicles from reentering the area as it is cleared.

B. Contractor's use of premises shall not interfere with operation of same. Elevators shall not be used for transfer of materials or equipment.

C. Contractor's debris removal path shall be over non-repaired services unless physical restraints prevent use of such path.

D. Contractor shall confine its apparatus, materials, equipment, tool cribs, field offices and operations to areas designated by Owner and/or Engineer/Architect. Premises shall not be unreasonably encumbered with materials and equipment. Neat and orderly stockpiling and other operations shall be maintained and debris shall be regularly removed from site. Contractor shall not load or permit any part of structure to be loaded with weight that will endanger structural integrity or safety of facility. Contractor shall limit axle loads to maximum 4000 lb per axle and gross weight of 8000 lb, or stockpiling of materials and equipment to 40 lbs per sq ft.

E. Contractor to note existing height restrictions within parking structure.

F. Contractor Parking: Contractor's employees shall park within confines of work area or pay prevailing parking rates.

G. On-Site Storage: Contractor shall not store materials or equipment at site of Work for more than one week prior to time that materials or equipment are incorporated into Work.

1.6 CLAIMS

A. Contractor shall promptly address all damages claims. Owner reserves right to resolve any claims not addressed by Contractor within 3 weeks after claim is received by Contractor. Any amounts paid by Owner will be deducted from Contractor's next progress payment.

SUMMARY OF WORK - RESTORATION 01 11 10 - 4

1.7 OWNER OCCUPANCY

A. Partial Owner Occupancy: Owner reserves the right to occupy and to place and install equipment in completed areas of building, prior to Substantial Completion provided that such occupancy does not interfere with completion of Work. Such placing of equipment and partial occupancy shall not constitute acceptance of total Work.

PART 2 - PRODUCTS (NOT APPLICABLE)

PART 3 - EXECUTION (NOT APPLICABLE)

END OF SECTION 01 11 10

©2026, Walker Parking Consultants/Engineers, Inc. All rights reserved.

WORK ITEMS 02 00 10 - 1

SECTION 02 00 10 - WORK ITEMS

PART 1 - GENERAL

1.1 RELATED DOCUMENTS

A. Drawings and general provisions of Contract, including General and Supplementary Conditions and Divisions 1 – 21 Specification Sections apply to this Section.

PART 2 - PRODUCTS (NOT APPLICABLE)

PART 3 - EXECUTION

WI 3.0 CONCRETE FLOOR REPAIR

A. Scope of Work

1. This Work consists of furnishing all labor, materials, equipment, supervision and incidentals including shoring necessary to locate existing spalls, locate and remove delaminated and unsound floor concrete, prepare cavities and install new concrete and reinforcing (as required) materials to restore concrete floor to original condition and appearance. Refer to Detail Series 3.0 for specific requirements.

B. Materials

1. Concrete repair materials shall be as specified in Division 03 Section "Cast-in- Place Concrete”, Division 03 Section “Cast-in-Place Concrete Restoration”, Division 03 Section “Prepackaged Repair Mortar”, and/or Division 03 Section “Latex Modified Concrete and Mortar."

2. Conventional steel reinforcement shall be as specified in Division 03 Section “Cast-in-Place Concrete”, Division 03 Section “Cast-in-Place Concrete Restoration” and/or Work Item 1.4, “Concrete Reinforcement.”

C. Execution

1. Locating, marking, removal, preparation, and inspection of deteriorated concrete and reinforcing steel preparation, repair and installation shall be performed as specified in Division 02 Section "Surface Preparation for Patching and Overlay.”

2. Final surface preparation, concrete placement, finishing and curing shall be performed as specified in concrete repair material specification. Manufacturer specifications/requirements for these issues shall also be followed in the event proprietary bag mix repair materials are used.

WORK ITEMS 02 00 10 - 2

WI 3.1 FLOOR REPAIR - PARTIAL DEPTH

(PERFORMED BY CITY STAFF)

A. Refer to Work Item 3.0, "Concrete Floor Repair" for scope of Work, materials and Execution procedure associated with this Work Item. Refer to Detail 3.1 for specific requirements.

WI 3.3 FLOOR REPAIR - FULL DEPTH

(PERFORMED BY CITY STAFF)

A. Refer to Work Item 3.0, “Concrete Floor Repair” for Scope of Work, Material and Execution procedures associated with this Work Item. Refer to Detail 3.3 for specific requirements.

WI 4.0 CONCRETE CEILING REPAIR

B. Scope of Work

1. This Work consists of furnishing all labor, materials, equipment, supervision and incidentals including shoring necessary to locate existing spalls, locate and remove delaminated and unsound overhead concrete, prepare cavities and install new concrete and reinforcing (as required) materials to restore overhead concrete to original condition and appearance. Refer to Detail Series 4.0 for specific requirements.

B. Materials

1. Trowel applied patching material shall be as specified in Division 03 Section "Prepackaged Repair Mortar." This material may be used for shallow removal and repair Work Items only.

2. Pressure applied concrete repair material shall be as specified in Division 03 Section "Shotcrete."

C. Execution

1. Locating, marking, removal, preparation, and inspection of deteriorated concrete and reinforcing steel preparation, repair and installation shall be performed as specified in Division 02 Section "Surface Preparation for Patching and Overlay.”

2. Final surface preparation, concrete placement, finishing and curing shall be performed as specified in concrete repair material specification. Manufacturer specifications/requirements on these issues shall also be followed in the event proprietary bag mix repair materials are used.

3. Contractor shall take care to protect adjacent areas from overspray if "Shotcrete" is used. Area adjacent to repair shall be cleaned to Owner's satisfaction prior to leaving site.

WORK ITEMS 02 00 10 - 3

WI 4.1 CEILING REPAIR - PARTIAL DEPTH

(PERFORMED BY CITY STAFF)

A. Refer to Work Item 4.0, "Concrete Ceiling Repair" for Scope of Work, materials and procedure associated with this Work Item. Refer to Detail 4.1 for specific requirements.

WI 7.0 CONCRETE WALL REPAIR

A. Scope of Work

1. Work consists of furnishing all labor, materials, equipment, supervision and incidentals including shoring necessary to locate existing spalls, locate and remove delaminated and unsound concrete, prepare cavities and install concrete and reinforcing (as required) materials to restore concrete walls to original condition and appearance. Refer to Detail Series 7.0 for specific requirements.

B. Materials

1. Pressure applied concrete repair materials shall be as specified in Division 03 Section "Shotcrete."

2. Cast-in-place concrete repair materials shall be as specified in Division 03 Section "Cast-in-Place Concrete”, Division 03 Section “Cast-in-Place Concrete Restoration”, Division 03 Section “Prepackaged Repair Mortar”, and/or Division 03 Section “Latex Modified Concrete and Mortar."

3. Conventional steel reinforcement shall be as specified in Division 03 Section “Cast-in-Place Concrete”, Division 03 Section “Cast-in-Place Concrete Restoration” and/or Work Item 1.4, “Concrete Reinforcement.”

4. Trowel applied patching material shall be as specified in Division 03 Section "Prepackaged Repair Mortar." This material may be used for shallow removal and repair Work Items only.

C. Execution

1. Locating, marking, removal ,preparation, and inspection of deteriorated concrete and reinforcing steel preparation, repair and installation shall be performed as specified in Division 02 Section "Surface Preparation for Patching and Overlay .”

Install shoring at repair locations where required per the Construction Documents prior to starting removals.

2. Final surface preparation, concrete placement, finishing and curing shall be performed as specified in concrete repair material specification. Manufacturer specifications/requirements on these issues shall also be followed in the event proprietary bag mix repair materials are used.

3. Contractor shall take care to protect adjacent areas from overspray if "Shotcrete" is used. Area adjacent to repair shall be cleaned to Owner's satisfaction prior to leaving site.

WORK ITEMS 02 00 10 - 4

WI 7.1 WALL REPAIR - PARTIAL DEPTH

(PERFORMED BY CITY STAFF)

A. Refer to Work Item 7.0, "Concrete Wall Repair" for scope of Work, materials and procedure associated with this Work Item. Refer to Detail 7.1 for specific requirements.

WI 10.0 EXPANSION JOINT REPAIR AND REPLACEMENT

A. Scope of Work

1. Work consists of furnishing all labor, materials, equipment, supervision and incidentals necessary to remove existing expansion joints, prepare adjacent concrete and furnish and install new expansion joint system. Refer to Detail Series 10.0 for specific requirements.

B. Materials

1. Expansion joint system materials shall be as specified in Division 07 Section "Expansion Joint Assemblies," installed in strict accordance with manufacturer's recommendations.

2. Cast-in-place concrete repair materials shall be as specified in Division 03 Section "Cast-in-Place Concrete”, Division 03 Section “Cast-in-Place Concrete Restoration”, Division 03 Section “Prepackaged Repair Mortar”, and/or Division 03 Section “Latex Modified Concrete and Mortar."

3. Trowel applied patching material shall be as specified in Division 03 Section Prepackaged Repair Mortar." This material may be used for shallow removal and repair Work Items only.

C. Execution

1. Contractor shall remove existing expansion materials in manner that minimizes damage to adjacent concrete.

2. Alterations to existing expansion joint blockout required for installation of new expansion joint system shall be performed in accordance with Work Item Series 9.0, "Expansion Joint Preparation."

3. Joint installation procedures shall be in accordance with referenced specifications and manufacturer's recommendations.

4. In-place testing: Prior to opening to traffic, test joint seal for leaks with 2 in. water depth maintained continuously for 12 hrs. Repair leaks revealed by examination of seal underside. Repeat test and repairs until all leaks stopped for full 12 hrs.

WI 10.3 EXPANSION JOINT – ELASTOMERIC CONCRETE EDGED

(PERFORMED BY CITY STAFF)

A. Refer to Work Item 10.0, "Expansion Joint Repair and Replacement" for scope of Work, materials and procedure associated with this Work Item. Refer to Detail 10.3 for specific requirements.

WORK ITEMS 02 00 10 - 5

WI 10.10 EXPANSION JOINT – HEADER REPAIR

(PERFORMED BY CITY STAFF)

A. Refer to Work Item 10.0, "Expansion Joint Repair and Replacement" for scope of Work, materials and procedure associated with this Work Item. Refer to Detail 10.10 for specific requirements.

WI 11.0 CRACK AND JOINT REPAIR

WI 11.1 ROUT AND SEAL RANDOM CRACKS

(PERFORMED BY CITY STAFF)

A. Scope of Work

1. Work consists of furnishing all labor, materials, equipment, supervision and incidentals necessary to locate, prepare and seal random cracks and unsealed construction and control joints in concrete floor and/or topping. Refer to Detail

11.1 for specific requirements.

B. Materials

1. Approved materials for use in this Work are specified in Division 07 Section "Concrete Joint Sealants."

C. Execution

1. Contractor shall thoroughly clean and inspect concrete slabs and/or topping for cracks and unsealed construction and control joints. Those identified as either greater than 0.03 in. wide or showing evidence of water leakage and/or salt staining on ceiling below shall be sealed. All cracks and joints identified for repair shall be marked with chalk to aid in precision routing. Obtain depths to top reinforcing bars and PT tendons in area of repair by use of a pachometer (rebar locator). Determine depth of electrical conduit (metal or plastic). Do not exceed this depth of routing where the crack to be repaired crosses the embedded items.

Damage to embedded items will require repair or replacement at no cost to the Owner.

2. Cracks and construction joints shall be ground or sawcut to an adequate width and depth as required by Work Item Detail. Routing shall be performed by mechanized device that has positive mechanical control over depth and alignment of cut. Hand held power grinders with abrasive disks shall not be used on control/construction joints, but may be used on random cracks.

3. Cavities shall be thoroughly cleaned by either sandblasting or grinding to remove all laitance, unsound concrete and curing compounds which may interfere with adhesion. Groove shall be air blasted to remove remaining debris.

4. Sealant materials and installation procedures shall be in accordance with referenced specifications for selected material.

5. Traffic coating manufacturer shall verify in writing that joint sealant is compatible with traffic coating.

WORK ITEMS 02 00 10 - 6

WI 11.7 COVE SEALANT

(PERFORMED BY CITY STAFF)

A. Scope of Work

1. Work consists of furnishing all labor, materials, equipment, supervision and incidentals necessary to prepare concrete surfaces and install cove sealant between floor and vertical surfaces as shown on Drawings. Refer to Detail 11.7 for specific requirements.

B. Materials

1. Joint sealant materials shall be as specified in Division 07 Section “Concrete Joint Sealants."

C. Execution

1. Intersection to be sealed shall be thoroughly cleaned by sandblasting to remove all contaminants and foreign material.

2. Entire Work area shall then be cleaned with compressed air to assure that all loose particles have been removed and that intersection is dry.

3. Properly prepared intersection shall be coated evenly and completely with joint primer material on each of intersecting faces in accordance with sealant manufacturer's recommendations.

4. After primer has cured, apply cove sealant to intersection such that sealant extends 0.75 in. onto each of intersecting faces.

5. Work cove sealant into joint so that all air is removed and tool to concave shape such that minimum throat dimension of no less than 0.5 in. is maintained.

6. Remove excess sealant and allow to cure.

WI 16.0 TRAFFIC COATING

A. Scope of Work

1. Work consists of furnishing all labor, materials, equipment, supervision and incidentals, including installation of joint sealant materials, necessary to prepare existing floor surfaces and install traffic coating. Coating of all vertical surfaces within Work limits shall be incidental to installation of traffic coating. Refer to Detail series 16.0 for specific requirements.

B. Materials

1. Traffic coating materials shall be as specified in Division 07 Section "Traffic Coatings."

C. Execution

1. Floor surface preparation shall be performed by coating system licensed applicator or under its direct supervision.

2. Shotblast surface preparation is required for floors.

WORK ITEMS 02 00 10 - 7

3. Coating system shall be installed by licensed applicators in strict accordance with manufacturer's recommendations and referenced specification section.

4. Crack preparation, including installation of sealant material where required, is incidental to traffic coatingwork.

5. Coating system shall be thoroughly cured prior to Work areas being returned to service.

WI 16.3 TRAFFIC COATING – REPAIR

(PERFORMED BY CITY STAFF)

A. Scope of Work

1. Work consists of furnishing all labor, materials, equipment, supervision and incidentals necessary to prepare surface of concrete patches and/or adjacent previously traffic coated areas, and install traffic coating on prepared concrete and existing traffic coating. Refer to Detail 16.3 for specific requirements.

B. Materials

1. Traffic coating materials shall be as specified in Division 07 Section "Traffic Coatings" and shall be compatible with existing system. Obtain written approval from new traffic coating manufacturer that existing coating surface is acceptable for installing new coating before beginning Work.

C. Execution

1. All loose existing coating shall be removed and exposed existing concrete surfaces prepared in accordance with manufacturer's recommendations and referenced specifications.

2. Preparation of new concrete patches shall be in strict accordance with manufacturer's recommendations and referenced specifications.

3. Completely shot blast or solvent wash all existing intact traffic coating within work limits that is to receive new coating material. Ensure existing coating to remain is adequately bonded to existing concrete slab.

WI 21.0 P/T SYSTEM REPAIR – MONOSTRAND

A. Scope of Work

1. This work consists of furnishing all labor, materials, equipment, supervision and incidentals necessary to make P/T tendon splice repairs and P/T end anchorage repairs to the monostrand post-tensioning system. Refer to Detail series 21.0 for specific requirements. Refer to Section “Unbonded Post-Tensioning Repairs” for further requirements.

2. The furnishing and installing of reinforcing steel as shown on the Details shall be performed by City Staff. Concrete removals and replacement is not included in this work and shall be performed by City Staff.

B. Materials

WORK ITEMS 02 00 10 - 8

1. Concrete for P/T repairs shall be as specified in Division 03 Cast-in-Place Concrete Restoration.

2. Post-Tensioning materials and related materials shall be as specified in Division 03 Section “Unbonded Post-Tensioning Repairs”.

C. Prequalified Suppliers:

1. Refer to Division 03 Section “Unbonded Post-Tensioning Repairs”.

D. Execution

1. Below is a general procedure for P/T tendon repairs. Work shall be coordinated with City staff. The actual repair procedure for each repair location may vary depending on existing conditions and shall be reviewed by the Engineer.

Contractor shall coordinate with Engineer.

a. Locate damaged tendon, measure and record length between anchor points.

b. Measure and record cable separation, failure point and offset from nearest column face. Mark adjacent floor slab beyond concrete removal boundary to reference the failed tendon end points.

c. Mark cable path on floor surface between anchors with marking paint.

d. Inspect floor slab top and bottom for cracks, delaminations, and spalls.

e. Remove all unsound and delaminated concrete only from floor and ceiling surfaces along tendon patch (see item 1 above).

1) Closely inspect the exposed tendon for damage at all concrete removal sites. If no damage is observed, proceed to step F. If damage is observed, comply with step 2 below.

2) Mark all damaged points for inspection by Engineer. Do not proceed with further concrete removals until after Engineer’s inspection and approval.

f. As directed by the Engineer, perform full depth removal at tendon anchorage to expose only the nonstressed side of the anchor plate.

Excavate the anchorage nearest the failure point first then, excavate the opposite end. Inspect the anchorage for damage. Note that the tendon will probably retain some residual stress from corrosion lock up at the tendon high points. Continue to use extra caution during concrete removals.

g. Coordinate inspection of end anchors by Engineer.

h. As directed by the Engineer, continue partial concrete removals at tendon high points adjacent to the tendon failure locations. Removal should begin at the high point (closest to the failure) and work successively towards the nearest exposed anchor. Perform removals a safe distance away from end anchors and intermediate anchors. Perform removals so as to systematically detension and free up each tendon in small sections between removal points. The Engineer may direct termination of concrete removals if exposed tendons are found to be relaxed and free of corrosion.

Cease removals as the Engineer directs, or when damaged tendon is released along its entire length.

WORK ITEMS 02 00 10 - 9

i. Perform remaining concrete removals both partial and full depth to accommodate tendon splicing and new end anchor installation.

j. Engineer will determine location, type and extent of tendon repair.

k. Install splice couplings, end anchors, sheathing, new tendons and reinforcing steel per the applicable Work Item and in accordance with Division 03 Section “Unbonded Post-Tensioning Repairs”. Cleaning and epoxy coating of all exposed reinforcing steel and P/T materials is incidental to concrete work.

l. Install patch concrete both partial and full depth at all locations except at stressing pockets and splice couplings.

m. Stress tendon when concrete has achieved 75 percent of required 28-day compression strength. Do not trim tendons until Engineer has approved stressing logs. Additional stressing shall be performed as required by Engineer and is incidental to the work.

n. Install patch concrete at stressing pocket and splice coupling locations.

o. Refer to Division 03 Section “Unbonded Post-Tensioning Repairs” for additional requirements.

WI 21.1 SLAB P/T TENDON REPAIR

(PERFORMED BY CONTRACTOR)

A. Refer to Work Item "P/T System Repair - Monostrand" for scope of Work, materials and procedure associated with this Work Item. Refer to Detail Series 21.0 for specific requirements.

WI 21.2 PROTECT EXPOSED P/T TENDON(S) (INCIDENTAL)

(PERFORMED BY CONTRACTOR)

A. Scope of Work

1. This work consists of furnishing all labor, materials, equipment, supervision and incidentals necessary to remove damaged tendon sheathing, re-grease (or epoxy coat tendons as approved by Engineer) in damaged area and install new sheathing. Refer to Detail 21.2 for specific requirements.

B. Materials

1. Refer to Division 03 Section “Unbonded Post-Tensioning Repairs”.

C. Execution

1. Remove damaged sheathing materials from exposed tendon.

2. Grease coating:

a. Apply additional corrosion-inhibiting grease over the damaged area to completely fill any void or surface depression caused by the sheathing damage.

3. Epoxy coating option (use only as approved by Engineer).

WORK ITEMS 02 00 10 - 10

a. Clean tendon to remove grease residue from exposed tendon.

b. Apply uniform coating of epoxy to exposed tendon.

4. Install split sheathing over exposed tendon. Sheathing shall overlap existing sheathing by at least two inches at each end. Sheathing shall be oriented such that the split is toward the bottom.

5. Tape entire length of repair, spirally wrapping tape around sheathing to provide at least two layers of tape. Taping shall overlap existing sheathing by 2 in. at each end.

WI 21.6 TENDON SPLICE COUPLING (CENTER-PULL)

A. Scope of Work

1. This work consists of furnishing all labor, materials, equipment, supervision and incidentals necessary to install a center-pull splice coupling for splicing and stressing of a tendon. Refer to Detail 21.6 for specific requirements.

B. Materials

1. Refer to Division 03 Section “Unbonded Post-Tensioning Repairs”.

C. Execution

1. Detension any remaining wires in tendons designated for repair.

2. Install center-pull splice coupling onto tendon with required overlap/extension and then stress tendon to specified stress. If this Work Item is performed in combination with other P/T repairs along same tendon, then stress tendon after concrete anchor blocks and patches have achieved the specified compressive strength. Refer to Detail 21.6 for specific requirements.

3. Epoxy coat coupling prior to installation of repair concrete.

4. Grease and wrap new and existing tendons in repair area in accordance with WI

21.2 and is incidental to this work.

5. Refer to WI 21.0 and Division 03 Section “Unbonded Post-Tensioning Repairs” or additional requirements.

WI 21.7 TENDON SPLICE COUPLING (SINGLE)

A. Scope of Work

1. This work consists of furnishing all labor, materials, equipment, supervision and incidentals necessary to install one tendon splice coupling and a length of new P/T tendon as Detailed. Refer to Detail 21.7 for specific requirements. This work is performed in conjunction with WI 21.6.

B. Materials

WORK ITEMS 02 00 10 - 11

1. Refer to Division 03 Section “Unbonded Post-Tensioning Repairs”.

C. Execution

1. Install new splice coupling assembly onto unstressed existing tendon. Extend the new tendon to the stressing location.

2. Epoxy coat all exposed splice coupling assembly prior to installation of repair concrete.

3. Grease and wrap new existing tendon at tendon splice repair area in accordance with WI 21.2 and is incidental to this work.

4. Refer to WI 21.0 and Division 03 Section “Unbonded Post-Tensioning Repairs” for additional requirements.

WI 21.9 PT TENDON MATERIAL

A. Scope of Work

1. This work consists of furnishing all labor, materials, equipment, supervision and incidentals necessary to provide and install new PT monostrand tendon in Work Items 21.7 where splice lengths are greater than that indicated on Details.

B. Materials

1. Refer to Division 03 Section “Unbonded Post-Tensioning Repairs.”

C. Execution

1. Install new tendon within concrete removal area as needed to replace damaged or defective tendon.

2. Tendon profile shall match existing. Use chairs and tie wire to maintain Tendon position during concrete placement.

3. Refer to Work Item 21.0 and Division 03 Section “Unbonded Post-Tensioning Repairs” for additional requirements.

END OF SECTION 02 00 10

or by any means without permission from Walker Parking Consultants/Engineers, Inc.

GENERAL CONCRETE SURFACE PREPARATION 02 51 30 - 1

SECTION 02 51 30 - GENERAL CONCRETE SURFACE PREPARATION

PART 1 - GENERAL

1.1 DEFINITIONS

A. DELAMINATIONS: Fracture planes, "internal cracks," within concrete. Typically these fractures are parallel to the member face and vary in depth.

B. NEAR-VERTICAL CHIPPED EDGES: Provide an edge dressed to within 20o of perpendicular of finished surface.

C. SPALLS: Potholes, cavities or voids in concrete. Usually result of delamination migrating to face of concrete member. When fracture finally reaches surface, concrete encompassed by delamination breaks away, resulting in spall.

D. UNSOUND CONCRETE: Concrete exhibiting one or more of:

1. Incipient fractures present beneath existing delaminated or spalled surfaces.

2. Honeycombing.

3. Friable or punky areas.

4. Deterioration from freeze-thaw action.

E. SCALING: Deterioration which attacks mortar fraction (paste) of concrete mix. First appears as minor flaking and disintegration of concrete surface. Scaling eventually progresses deeper into concrete, exposing aggregate which breaks away.

F. SHOTBLASTING: Scarification of concrete surfaces using an abraded metal shot-rebound. See ICRI Guideline 03732 “Selecting and Specifying Concrete Surface Preparation for Sealers, Coatings, and Polymer Overlays.”

PART 2 - PRODUCTS (NOT APPLICABLE)

PART 3 - EXECUTION (NOT APPLICABLE)

END OF SECTION 02 51 30

SURFACE PREPARATON FOR PATCHING 02 51 40 - 1

SECTION 02 51 40 - SURFACE PREPARATION FOR PATCHING

PART 1 - GENERAL

1.1 RELATED DOCUMENTS

A. Drawings and general provisions of Contract, including General and Supplementary Conditions and Division 01 Specification Sections apply to this Section.

1.2 SUMMARY

A. This Section includes the provision of all labor, materials, equipment, supervision and incidentals necessary to locate and remove all delaminated and unsound concrete, all existing failed patches, all existing surface spalls and potholes, and preparation of cavities created by removal to receive concrete patching material.

B. This Section includes the provision of all labor, materials, equipment, supervision and incidentals necessary to prepare existing sound concrete slab surfaces to receive bonded concrete overlay.

C. Related Sections: Following Sections contain requirements that relate to this Section:

1. Division 03 Section “Cast-in-Place Concrete Restoration”

2. Division 03 Section “Prepackaged Repair Mortar”

1.3 REFERENCES

A. "Specifications for Structural Concrete for Buildings" (ACI 301) by American Concrete Institute, herein referred to as ACI 301, is included in total as specification for this structure except as otherwise specified herein.

B. Comply with provisions of following codes, specifications and standards except where more stringent requirements are shown on Drawings or specified herein:

1. ”Concrete Repair Guide” (ACI 546R-04)

PART 2 - PRODUCTS (NOT APPLICABLE)

PART 3 - EXECUTION

3.1 INSPECTION

A. Floor Slabs:

SURFACE PREPARATON FOR PATCHING 02 51 40 - 2

1. Floor slab delaminations: locate by sounding surface with hammer, rod, or chain drag.

2. When delaminated area is struck, distinct hollow sound is heard.

3. Contractor: sound all designated floors for delaminations.

4. Certain structural systems that contain thin slab thicknesses with Welded Wire

Reinforcement or other small diameter reinforcing, such as waffle slab or precast tees, may have significant deterioration without evidence of delaminations.

These structural systems require qualified personnel to provide additional inspections, primarily visual in nature, to define the extent of deterioration.

5. Contractor: Visually inspect thin slab thicknesses with small diameter reinforcing for deterioration.

B. Vertical and Overhead Surfaces:

1. Vertical and overhead surface delaminations: locate by sounding appropriate member with hammer or rod.

2. Cracks, usually horizontal in orientation along beam faces, and vertical in orientation near column corners are indicators of delaminated concrete.

3. Contractor: sound only vertical and overhead surfaces that show evidence of cracking and/or salt and water staining.

C. Delaminated areas, once located by Contractor, shall be further sounded to define limits. Mark limits with chalk or paint.

D. Contractor: locate spalls by visual inspection and mark boundaries with chalk or paint after sounding surface.

E. Engineer/Architect will define and mark additional unsound concrete areas for removal, if required.

F. Areas to be removed shall be as straight and rectangular as practical to encompass repair and provide neat patch.

G. Contractor: Locate and determine depth of all embedded REINFORCEMENT, POST-TENSIONING TENDONS, and ELECTRICAL CONDUIT in repair area and mark these locations for reference during concrete removal. Do NOT nick or cut any embeds unless approved by Engineer/Architect.

H. For overlay installation, boundaries of overlay areas will be as defined in project drawings and verified by Engineer/Architect.

3.2 PREPARATION

A. Temporary shoring may be required at concrete floor repair areas exceeding 5 sq ft and at any beam, joist, or column repair. Contractor: Review all marked removal and preparation areas and request clarification by Engineer/Architect of shoring requirements in questionable areas. Shores shall be in place prior to concrete removal and cavity preparation in any area requiring shores.

SURFACE PREPARATON FOR PATCHING 02 51 40 - 3

B. Delaminated, spalled and unsound concrete floor areas: mark boundaries. All concrete shall be removed from within marked boundary to minimum depth of 0.75 in.

using 15 to 30 lb chipping hammers equipped with chisel point bits. When directed by Engineer/Architect, chipping hammers less than 15 lb shall be used to minimize damage to sound concrete. Near vertical chipped edge shall be provided along perimeter of repair area where shown on drawings. Areas to be removed shall encompass repair and provide uniform cavity surface. If delaminations exist beyond minimum removal depth, chipping shall continue until all unsound and delaminated concrete has been removed from cavity.

C. Where embedded reinforcement or electrical conduit is exposed by concrete removal, exercise extra caution to avoid damaging it during removal of unsound concrete. If bond between exposed embedded reinforcement and adjacent concrete is impaired by Contractor's removal operations, Contractor shall perform additional removal around and beyond perimeter of reinforcement for minimum of 0.75 in. along entire length affected at no cost to Owner.

D. If rust is present on embedded reinforcement where it enters sound concrete, additional removal of concrete along and beneath reinforcement required. Additional removal shall continue until non-rusted reinforcement is exposed, or may be terminated as Engineer/Architect directs.

E. Sawcut patch and overlay boundaries to depth of 0.75 in. into floor slab, unless otherwise noted. No sawcutting required at overlay boundaries abutting existing vertical surface (wall, beam, curb, etc.).For vertical and overhead surfaces marked boundary may be sawcut, ground or chipped to depth of 0.5 in. to 0.625 in. into existing concrete, measured from original surface. All edges shall be straight and patch areas square or rectangular-shaped. Diamond blade saw or grinder with abrasive disk suitable for cutting concrete is acceptable for performing work. Edge cut at boundary shall be dressed perpendicular to member face. It shall also be of uniform depth, for entire length of cut. Exercise extra caution during sawcutting to avoid damaging existing reinforcement (ESPECIALLY POST-TENSIONING TENDONS AND SHEATHING) and electrical conduit and any other embedded items near surface of concrete. Any damage to existing reinforcement, post-tensioning tendons or sheathing during removals shall be repaired by Contractor with Engineer/Architect-approved methods at no additional cost to Owner.

F. All sound surfaces (surfaces not requiring spall or delamination repair as previously discussed in this section) to receive overlay shall be heavy abrasive blasted or heavy shotblasted prior to overlay placement, to produce a final concrete surface profile matching ICRI CSP.

3.3 INSPECTION OF REPAIR PREPARATION

A. After removals are complete, but prior to final cleaning, exposed concrete surfaces and exposed reinforcement shall be inspected by Contractor and verified by Engineer/Architect for compliance with requirements of this Section. Where Engineer/Architect finds unsatisfactory surface or cavity preparation, Engineer/

SURFACE PREPARATON FOR PATCHING 02 51 40 - 4

Architect shall direct Contractor to perform additional removals. Engineer/Architect shall verify areas after additional removals.

B. Contractor shall inspect embedded reinforcement and conduits exposed within cavity for defects due to corrosion or damage resulting from removal operations. Contractor shall notify Engineer/Architect of all defective and damaged reinforcement or conduits.

Replacement of damaged or defective reinforcement or conduits shall be performed according to this Section and as directed by Engineer/Architect.

C. After inspections of exposed surfaces and reinforcement are complete, Engineer/ Architect and Contractor shall measure and document removal and replacement quantities for payment, as required.

3.4 REINFORCEMENT AND EMBEDDED…