CNF Restroom Replacement Specs.pdf

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SPECIFICATIONS

FOR

CORONADO NATIONAL FOREST

RESTROOM REPLACEMENT

(BEAR CANYON OVERLOOK, CAMP RUCKER,

AND ROSE CANYON LAKE)

May 21, 2021

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SPECIFICATIONS

DIVISION 1 – GENERAL REQUIREMENTS

01010 – Scope of Work 01020 – Measurement & Payment 01030 – Construction Staking 01040 – Submittals 01050 – Quality Control 01070 – Mobilization

DIVISION 2 – SITE WORK

02010 – Demolition and Clearing 02020 – Earthwork 02030 – Surfacing 02040 – Finish Grading 02060 – Aggregate Base 02100 – Portland Cement Concrete Paving

DIVISION 3 – CONCRETE

03010 – Concrete Formwork 03020 – Concrete Reinforcement 03030 – Cast-in-Place Concrete 03040 – Concrete Finishing

DIVISION 10 – SPECIALTIES

10010 – Restrooms 10020 – Trash bins 10030 – Water Hydrants 10040 – Picnic Tables

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DIVISION 1 – GENERAL REQUIREMENTS

SCOPE OF WORK – 01010

PART 1 – GENERAL

1.1 – Description

Furnish all material, equipment, transportation, labor and supervision necessary to complete all work, according to the Drawings and Specifications.

Scope of work includes:

1. Demolition of existing restroom buildings, slabs, concrete stairs, railings, and other items associated with buildings.

2. Installation and compaction of fill material, riprap, and aggregate, and site grading.

3. Installation of vault restroom buildings, including 2-hole buildings at Bear Canyon

Overlook and Camp Rucker and a 6-hole building at Rose Canyon Lake. This work includes providing bedding material and establishment of FFE.

4. Construction of concrete walks and slabs, and a concrete stairway with railing.

5. Installation of trash bins and picnic tables.

6. Relocation of water hydrant and drain pit, and trash bins.

1.3 – Location and Conditions Project locations are

• Bear Canyon Overlook is in Sabino Canyon Recreation Area.

• Camp Rucker is located in the Chiricahua Mountains on Forest Road 74E.

• Rose Canyon Campground (Lake) is located on Mt. Lemmon (Catalina Highway).

It is the Contractor’s responsibility to familiarize themselves with the existing conditions and notify the Government of any discrepancies shown in these documents.

For delivery of materials and other construction-related items, the Contractor is advised to determine safe vehicle lengths and load limits for roads that access the site.

1.4 – Schedule

A pre-work meeting for clarification of the project will be held if needed or desired by either the contractor or the Government.

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A schedule for all work must be submitted to and approved by the Government.

The Contractor shall notify the Forest Service three (3) days in advance of any survey work and seven (7) days in advance of any construction work.

1.5 – Contract Administration

The Contractor shall be fully responsible for seeing that construction activities conform to the approved final drawings and specifications, and according to provisions of this contract. The Government will provide timely reviews as requested by the Contractor and may periodically review work at any time.

Construction quality control shall include supplying all the personnel, equipment, specifications and provisions of the contract.

The Contractor shall not disturb plants, soil, or other site features except within the areas necessary to complete the work. The Contractor shall clearly stake limits of construction and maintain marks throughout construction. The Government will review all staking.

1.6 – Quality of Work

Use recovered materials, recyclable materials, and environmentally preferable products and services where possible as per Executive Order 13423.

1.7 – Codes and Standards

Codes and standards of the following associations and listed publications will become part of this contract:

1. International Building Code (IBC)

2. American Concrete Institute (ACI) - Manual 318

3. American Disabilities Act/Architectural Barriers Act Accessibility Guidelines

(ADAABAAG), and Forest Service Outdoor Recreation Accessibility Guidelines (FSORAG). FSORAG are available on the internet at www.fs.fed.us/recreation/programs/accessibility.

4. American Society for Testing and Materials (ASTM)

5. Standardized Specifications for Paints and Coatings (SSPC)

6. American National Standards Institute (ANSI)

7. Occupational Health and Safety Administration (OSHA) standards

8. Manual of Uniform Traffic Control Devices (MUTCD)

9. Arizona Department of Transportation Structures Section Standard Drawings

(ADOT B-Standards)

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All materials, workmanship, and designs shall meet specified requirements of the standards referenced in this section and other local or state codes, related to this type of work, whichever is more stringent. If a particular item is not covered by a standard, it shall be proven by certified test by a reputable laboratory to be capable of performing satisfactorily.

1.8 – Special Construction Requirements

A. Government shall flag all items to salvage. Contractor shall transport these items to the Sabino Canyon Warehouse.

B. Upon completion of the project, demolished structures and other construction materials shall be removed from Government Land and disposed of in accordance with State and County standards.

C. Construction Access and Protection: The Contractor shall secure the sites. The Contractor shall also provide sufficient signs, barriers, barricades, markers, etc. to warn the public of hazardous conditions and to protect the public from injury.

D. Roof panels on the restrooms at Bear Canyon Overlook and Camp Rucker are asbestos. Remove, wrap, and dispose of panels appropriately per all State and Federal requirements.

E. At Bear Canyon Overlook, a portion of the loop may be closed during construction.

Allow for public access (pedestrian and bike) and allow the Sabino Shuttle to turn around at the site. At Camp Rucker and Rose Canyon Lake, a portion of the parking areas may be used by the contractor during construction.

F. Equipment and material storage: The Contractor shall obtain permission from the Government for equipment and material storage, and for other areas needed for construction.

G. Protect trees and large vegetation to remain. No live trees are to be cut unless designated on the drawings. Dead trees and stumps may be removed. Tree limbs may be trimmed as necessary.

H. Sanitation/Garbage: The Contractor may use existing Forest Service restrooms at nearby recreation sites. At Camp Rucker and Rose Canyon Lake, during the period of time when there is no permanent restroom available to the public, the Contractor shall provide two portable restrooms for the public at Camp Rucker and 4 portable restrooms at Rose Canyon Lake and shall keep these restrooms cleaned and stocked until construction is complete. No garbage service is available for Contractor use. The Contractor shall keep the construction site free of loose garbage at all times.

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I. Contractor shall ensure that construction activities minimize their disturbance footprint. Equipment shall avoid damage to surface soils and vegetation beyond what is necessary for completion of work items.

1.5 – Utility Services

There is no electricity available at an of the sites.

1.6 – Contract Closeout

Remove temporary facilities and provide final cleaning and touch-up. Restore portions of site improvements, landscaping, and other items damaged by construction operations to the satisfaction of the Government at no additional expense to the Government.

*** END OF SPECIFICATION 01010 ***

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MEASUREMENT & PAYMENT – 01020

PART 1 – GENERAL

1.1 – Determination of Quantities

A. The following measurements and calculations are used to determine contract quantities.

1. The average end area method will be used to compute volumes of excavation or embankment. However, if in the judgment of the Government, the average end area method is impractical, measurement will be made by volume in hauling vehicles or by other three-dimensional methods.

2. Structures will be measured according to lines SHOWN ON THE DRAWINGS or as altered in writing by the Government to fit field conditions.

3. For items that are measured by the linear foot, measurements will be made parallel to the base or foundation upon which the structures are placed. Pipe culverts shall be measured along center of invert and pipe arches shall be measured at spring line.

4. For vehicular shipments, net certified scale weights or weights based on certified volumes will be used as a basis of measurement. Measurements will be adjusted when material has been lost from the vehicle, has been wasted, or has otherwise not been incorporated into the work. Determining true weights of hauling vehicles shall be made by weighing the empty vehicles at least once a day as directed by the Government. Each vehicle shall bear a plainly legible identification mark.

5. For aggregates weighed for payment, the tonnage will not be adjusted for moisture content unless otherwise provided.

6. For standard manufactured items (such as fence, wire, plates, rolled shapes, pipe conduits) which are specified by gauge, weight, section measurements, and so forth, such identifications shall be considered the nominal weights or dimensions.

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Unless controlled by tolerances in cited specifications, manufacturer's tolerances will be accepted.

1.2 – Units of Measurement

A. Payment will be by units defined and determined according to U.S. Standard measure and by the following:

1. Cubic Yard: A measurement computed by one of the following methods:

(a) Excavation, Embankment, or Borrow. The measurement computed by the average end area method from measurements made longitudinally along a centerline or reference line.

(b) Material in Place or Stockpile. The measurement computed using the dimensions of the in-place material.

(c) Material in the Delivery Vehicle. The measurement computed using measurements of material in the hauling vehicles at the point of delivery.

Vehicles shall be loaded to at least their water level capacity. Leveling of the loads may be required when vehicles arrive at the delivery point.

2. Ton: Short ton consisting of 2,000 pounds.

*** END OF SPECIFICATION 01020 ***

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DIVISION 1 – GENERAL

REQUIREMENTS CONSTRUCTION

STAKING – 01030

PART 1 – GENERAL

1.1 – Scope

This section specifies construction staking required for all construction needs. PART

2 – PRODUCTS

None

PART 3 – EXECUTION

3.1 – General

The Contractor shall set all flagging, stakes, nails and string lines etc. necessary to construct a complete project as SHOWN ON THE DRAWINGS. The Contractor is responsible for verifying any existing control points shown on the plans. The Contractor shall be responsible for maintaining all staking and for replacing any stakes lost or destroyed during their use period. Construction work shall not begin on an item until the staking for that item has been approved by the Government. This approval will not relieve the Contractor of the responsibility and the associated costs for correcting any errors, whether the errors are discovered during the performance of the survey or during subsequent phases of the project.

*** END OF SPECIFICATION 01030 ***

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SUBMITTALS – 01040

PART 1 – REQUIREMENTS

It will be the Contractor's responsibility to submit all items with such promptness as to cause no delay in the work. Approvals must be obtained before starting work which involves the item. Contractor shall allow 5 days for processing of submittals by the Government.

Submittals may also be referred to as shop drawings.

PART 2 – MANUFACTURER'S LITERATURE AND SHOP DRAWINGS

A. The Contractor shall submit three (3) copies of all submittals to the Government for approval on the items required herein. For each submittal, the Contractor must receive written approval from the Government to use the item before incorporating it into the project work. Literature must be marked or otherwise designated to show the exact model, size, etc. the Contractor proposes to use. Information must be adequate to determine compliance with the specifications. Approvals must be received for products differing from those described in the Government-supplied specifications.

B. Submittals will be waived if the Contractor furnishes the exact item used for design when the manufacturer's model, size, etc. are shown in the contract.

C. Certificates of compliance are required for the following items:

1. Aggregate

2. Concrete (flatwork and curb)

3. Rebar

4. Fill Material

5. CXT Restroom Building

6. Romtec Restroom Building

*** END OF SPECIFICATION 01040 ***

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QUALITY CONTROL– 01050

PART 1 – DESCRIPTION

This work shall consist of providing quality control in conformance with the inspection of construction provisions of this contract to ensure compliance with the drawings, specifications, and provisions of the contract. The contractor shall provide all personnel, equipment, tests, and reports necessary to meet the requirements of this specification.

PART 2 – CONSTRUCTION

The Contractor shall provide and maintain a quality control system that will ensure that all services, supplies, and construction required under this contract conform to the contract requirements. The Contractor shall perform, or cause to be performed, the sampling, inspection, and testing required to substantiate that all supplies, services, and construction conform to the contract requirements.

A. Quality Control Plan. The Contractor shall submit the following in writing:

1. Authorities and responsibilities of inspection and testing personnel.

2. Experience and qualifications of inspection and testing personnel to be assigned and name and location of any (for hire) testing facility to be used.

B. Approval of Quality Control Plan. The Contractor's proposed quality control plan for all items requiring quality control shall be submitted to the Government for review prior to the Contractor commencing work. Within 5 days of receipt of plan, the Government shall notify the Contractor whether the plan adequately covers quality control requirements. Construction work shall not be performed prior to Contractor's receipt of written approval of the proposed plan. The Contractor shall submit to the Government, in writing, any proposed changes in the approved quality control plan.

Proposed changes shall not be put into effect until approved in writing by the Government.

The Contractor shall provide and maintain appropriate measuring and testing devices, equipment, and supplies to accomplish the required measurement, testing, and inspection in a timely manner. Tests, measurements, and certifications shall be made as required by the drawings and specifications. The Contractor shall take samples and perform inspections and tests necessary to achieve the quality of construction required by the contract.

C. Inspection and Tests. The Contractor shall maintain current records of all inspections and tests performed. The following format or one containing the following information will be acceptable to the Government:

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Project Name Contract No.

Tested By

Item Test Date Location Standard Results (Initials)

The Contractor shall certify in writing that all inspections and tests were performed in accordance with specifications.

D. As-Built Drawings. The Contractor shall maintain a set of the contract drawings depicting as-built conditions. These drawings shall be maintained in a current condition and shall be available for review. All variations from contract drawings shall be indicated in red on the drawings. Upon completion of the contract work, as-built drawings shall be submitted to the Government.

E. Frequencies for making approvals, inspecting, sampling and testing shall be as shown in Table 1400-1. Responsibilities shall be as shown in Table 1400-1. The following key refers to the abbreviations shown in Table 1400-1:

1. CC: Certification and/or inspection, sampling, and testing by Contractor, or Contractor's representative.

2. CL: Approvals, inspections, sampling, testing or measuring under the direction of and certification by a qualified employee of a certified lab or by a Registered Professional Engineer in the state of Arizona. The Contractor shall be responsible for furnishing the Professional services as shown in Table 1400-1.

TABLE 1400-1

QUALITY CONTROL, INSPECTION, SAMPLING, TESTING, AND MEASUREMENTS

Item Approvals, inspections, sampling, minimum or tests required Frequency Certification

Fill Compaction test 1 total CL

Aggregate base Compaction test 1 total CL

Concrete Cylinder set 1 CL

Air entertainment test 1 CL

Slump 1 CL

*** END OF SPECIFICATION 01050 ***

MOBILIZATION – 01070

PART 1 – GENERAL

1.1 – Description

This section specifies preparatory work and operations necessary for the movement of personnel, equipment, supplies, and incidentals to the project site, and for all other work and operations that must be performed or that cause costs to be incurred prior to beginning work

*** END OF SPECIFICATION 01070 ***

*** END DIVISION 1

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***DIVISION 2 – SITE WORK

DEMOLITION AND CLEARING – 02010

PART 1 – GENERAL

1.1 – Section Includes

A. Removal of surface debris and clearing of vegetation.

B. Removal of facilities including restroom building and concrete slabs.

1.2 – References

A. Coordinate clearing work with the Government.

B. Comply with site-specific landscape and hardscape demolition requirements found in other sections and drawings.

PART 2 – PRODUCTS

Not Used.

PART 3 – EXECUTION

3.1 – Preparation

Verify that existing plants designated to remain are identified and protected. Mark all trees to remain in a manner that indicates pre-demolition ground level and use marking system that does not damage trees to be so marked.

3.2 – Protection

A. Protect plants and features not required to be removed by construction activities.

B. Protect existing structures from damage or displacement. Also protect vegetation, soils, and boulders that are outside grading limits.

3.3 – Clearing

A. Do not remove any trees unless approved by the government.

B. If any archaeological artifacts or evidence is encountered, notify the Government and halt work in the area immediately.

3.4 – Removal

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A. Remove and legally dispose all construction debris and extracted plant life from site.

B. The Contractor shall perform the work as shown on the drawings.

C. The Contractor shall be responsible for removal, equipment, containment, cleanup, and associated costs necessary for removing and salvaging items shown on the plans.

D. All facilities and materials scheduled for demolition must be completely removed and disposed of legally off Government lands by the Contractor.

D. Fill all holes and restore grades wherever facilities or extracted plant life are removed.

E. Sawcut asphalt to be removed at joints as directed by Government.

F. Restroom demolition shall be as follows:

All sites: Empty vaults or composting chambers according to State and local regulations.

Bear Canyon Overlook: Remove and dispose of all above-grade materials (including building and associated slabs, walls, steps, and railings). Remove and dispose of all below-grade materials at least 2 feet below finished ground elevation and 1 foot below new restroom vaults. Existing vaults may be left in place, but shall be broken sufficiently so that they do not hold water. Backfill resulting hole with fill material or if it is more cost-effective a combination of fill material and concrete and block from building demolition, broken so no dimension is greater than 16” and rebar removed.

Ensure that compaction of fill material provides good bearing capacity for new restroom vaults. Submit proposal for Government review.

Camp Rucker: Remove and dispose of all above-grade materials (including building and associated slabs, walls, steps, and railings). There is likely no vault for this restroom, and the Contractor shall remove all below-ground structures (which are likely limited to a CMP pipe). If there is a vault, follow below-ground instructions for Bear Canyon Overlook above. Backfill resulting hole with fill material or if it is more cost-effective a combination of fill material and concrete and block from building demolition, broken so no dimension is greater than 16” and rebar removed.

Ensure that compaction of fill material provides good bearing capacity for new restroom vaults. Submit proposal for Government review.

Rose Canyon Lake: Remove and dispose of all above-grade materials (including buildings and associated slabs, walls, steps, and railings) and all composting equipment in basement. Remove and dispose of all below-grade materials at least 2 feet below finished ground elevation and 1 foot below new restroom vaults. Portions of the basement floors and associated walls that will meet these below-grade requirements may be left in place, but shall be broken sufficiently so that they do not hold water. Backfill resulting hole with fill material or if it is more cost-effective a combination of fill material and concrete and block from building demolition, broken so no dimension is greater than 16” and rebar removed. Ensure that compaction of fill material provides good bearing capacity for new restroom vaults. Submit proposal for Government review.

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*** END OF SPECIFICATION 02010 ***

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DIVISION 2 – SITE WORK

EARTHWORK – 02020

PART 1 – GENERAL

1.1 – Work Included:

Supply and place fill material as required for finished grading around new toilet buildings.

Utilize site excavation prior to importing material for required fill operations.

PART 2 – PRODUCTS

Fill Materials:

Satisfactory Soils: ASTM D 2487 soil classification groups GW, GP, GM,SW, SP, and SM or a combination of these group symbols; free of rock or gravel larger than 3 inches in any dimension, debris, waste frozen materials, vegetation, and other deleterious matter.

Other acceptable fill material: Crushed aggregate, conforming to the requirements of AASHTO M147, grade D

PART 3 – EXECUTION

1.1 – Preparation A. The Contractor shall familiarize himself with all site conditions prior to the start of work, and shall notify the Government of any discrepancies found between site conditions and the contract documents.

B. Scheduling:

1. Schedule all work in a careful manner with all necessary consideration for the public.

2. Avoid interference with the use of, and access to adjacent facilities.

1.2 – Excess Water Control:

A. Finish grading operations shall be performed during dry weather. Soil shall not be in a wet condition.

B. All standing water shall be promptly removed. Finish grading shall not resume until conditions and approved by the Government.

C. The Contractor shall be responsible for positive drainage of all areas of work.

1.3 – Compaction:

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A) Compacted fill and backfill shall be placed with suitable equipment in horizontal layers not to exceed 9 inches in depth for rubber tired or vibratory rollers, 6 inches for tamping rollers and 4 inches when mechanical tampers are used.

B) Before placing fill material, surfaces to receive compacted fill shall be cleared of all existing obstructions and vegetation debris. All foundation surfaces to receive fill shall be smoothed, scarified and compacted to 95% of maximum density as determined in accordance with ASTM D 698 for a depth of at least 12 inches using approved compaction equipment.

C) Each layer of compacted fill shall be compacted to not less than 95 percent of maximum density when tested in accordance with ASTM D 698.

D) Aggregate shall be compacted a minimum of 95% of maximum density as determined by AASHTO T180-74 Method D.

1.4 – Finish Grading

A. Fine grade all areas, eliminating rough and low areas. Maintain levels, profiles and contours to subgrades. Maintain positive drainage away from the structure.

B. Remove all stones, roots, grass, weeds and other foreign material while finish grading. Remove and dispose legally of all debris.

*** END OF SPECIFICATION 02020 ***

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SURFACING – 02030

PART 1 – GENERAL

1.1 – Description Of Work

Work as evident on drawings and specified herein or required to accomplish the removal, replacement and installation of miscellaneous surfacing materials as required to comply with the construction drawings.

1.2 – Related Specifications

A. Pima County/City of Tucson (PC/COT) Standard Specifications and Details for Public Improvements (2003 Edition), hereafter referenced as PC/COT.

B. Pima County Wastewater Management Department, Manual of Engineering Standards and Procedures.

C. Tucson Water's Standard Waterworks Specifications and Details.

1.3 – Quality Assurance

Codes, Standards: Standard Details and Materials Standards as referenced herein.

1.4 – Submittals

A. Mix Designs: The Contractor shall submit a mix design for the following materials to the Government for review and approval:

1. Portland Cement Concrete, one submittal for each class of concrete utilized.

2. Asphaltic Concrete, one submittal for each mix of asphaltic concrete utilized.

B. Aggregate Base Course: The Contractor shall submit a laboratory analysis of the aggregate base course material.

1.5 - Dust Control

A. The Contractor shall maintain adequate dust control at all times by sprinkling with water or other approved methods. Any and all claims for dust damage and nuisance to persons or property shall be borne solely by the Contractor.

PART 2 – PRODUCTS

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2.1 – PORTLAND CEMENT CONCRETE (PCC)

The Portland Cement Concrete shall conform to PC/COT Standard Specification No. 1006 and the class specified.

2.2 – Aggregate Base Course

The aggregate base course shall conform to PC/COT Standard Specification No. 303.

2.3 – Joint Material

Joint material shall conform to PC/COT Standard Specification 1011.

2.4 – Hot Bituminous Mix shall conform to PC/COT Standard Spec 406 Residential #2.

PART 3 – EXECUTION

3.1 – Cleanup

A. Clean all foreign material from finish surfaces.

B. Dispose of all debris, unsalvageable material and all other unsuitable material in accordance with all governing rules and regulations.

*** END OF SPECIFICATION 02030 ***

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FINISH GRADING – 02040

PART 1 – GENERAL

1.2 – Work Included:

Soil preparation for raked areas, naturalizing grades where buildings and associated facilities are removed, and backfill along concrete slab edges.

1.3 – Job Conditions:

Comply with local regulations for dust control.

PART 2 – PRODUCTS

Refer to other specifications and the plans.

PART 3 – EXECUTION

3.1 – Preparation

C. The Contractor shall familiarize himself with all site conditions prior to the start of work, and shall notify the Government of any discrepancies found between site conditions and the contract documents.

D. Scheduling:

1. Schedule all work in a careful manner with all necessary consideration for the public.

2. Avoid interference with the use of, and access to adjacent facilities.

3.2 – Excess Water Control

A. Finish grading operations shall be performed during dry weather. Soil shall not be in a wet condition.

B. All standing water shall be promptly removed. Finish grading shall not resume until conditions and approved by the Government.

C. The Contractor shall be responsible for positive drainage of all areas of work.

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3.3 – Finish Grading

C. Fine grade all areas, eliminating rough and low areas. Maintain levels, profiles and contours to subgrades.

D. Remove all stones, roots, grass, weeds and other foreign material while finish grading. Remove and dispose legally of all debris.

E. Backfill along all concrete edges so that none protrude over 1/2" above surrounding grade. Fill slopes shall be 4:1 or flatter (unless shown otherwise on drawings) with a 1’ flat compacted aggregate shoulder adjacent to the pavement unless shown otherwise on the plans.

*** END OF SPECIFICATION 02040 ***

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AGGREGATE BASE - 02060

PART I-GENERAL

1.1 SUMMARY

The work of this section consists of furnishing and placing aggregate, and filler if required, on a prepared subgrade.

1.2 SUBMITTALS

A. Two copies of certified weight tickets for each load of aggregate delivered to project site.

B. If materials are obtained from a commercial source, submit certification from the supplier certifying that aggregate base course meets the requirements of this section.

C. Submit all Material and Compaction Test results directly to Contracting Officer (CO) from testing services, with copy to Contractor.

1.3 QUALITY ASSURANCE

A. Material Test and Compaction Test to be the responsibility of the Contractor.

B. PART 2 –PRODUCTS

2.1 AGGREGATE

A. Clean, hard, durable fragments or particles of crushed stone, crushed slag, or crushed or natural gravel. Materials that break up due to freeze-thaw or wet-dry cycling shall not be used.

B. Coarse Aggregate: AASHTO T96- 77, percentage of wear of not more than 50.

C. Fraction passing No. 40 sieve shall have a liquid limit not to exceed 25 and a plasticity index of not more than six, as detennined byAASHTO T89-81 and 0-81, respectively.

D. Material, inclusive of filler, shall meet following screen analysis requirements by weight:

SIEVE DESIGNATION PERCENT PASSING

1-1/2 inch 100 1 inch 80 - 100 No.4 35 - 75 No. 40 10 - 30 No. 200 0 - 10

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PART 3 – EXECUTION

3.1 PLACING

If the required compacted depth of the aggregate base course exceeds six inches, place course in two or more layers of approximately equal thickness. The maximum compacted thickness of anyone layer will not exceed six inches.

3.2 MIXING

Mix the aggregate by anyone of the three following methods:

1. Stationary Plant Method: Mix aggregate base course and appropriate amount of water for compaction in an approved mixer. After mixing, transport aggregate to the job site while it contains the proper moisture content and place on the roadbed with an approved aggregate spreader. Before compaction, remove excess moisture.

2. Travel Plant Method: After the material for each layer has been placed through an aggregate spreader or windrow-sizing device, it shall be uniformly mixed by a traveling mixing plant.

3. Road Mix Method: After placing each layer, mix materials at optimum moisture content using motor graders or other approved equipment until the moisture is uniform throughout.

3.3 COMPACTION

Compact each layer to a density of not less than 95 percent of the maximum density, as determined by AASHTO T180- 74, Method D.

3.4 SURFACE FINISHING

A. Use a smooth steel wheel roller for the final rolling of top surface base course. Water surface and evenly spread loose stones before final rolling. Make minimum of two complete passes over area to embed stones. Correct soft spots developed during rolling.

B. Compacted base course surface shall be smooth and free from waves and other irregularities.

Unsatisfactory portions of base course shall be tom up, reworked, re-laid, and re-rolled, at no additional expense to Government.

3.5 MATERIAL ACCEPTANCE REQUIREMENTS

Acceptance will be based on periodic samples and tests taken following mixing and before laying.

3.6 TOLERANCES

Surface: Contractor shall test finished surface of the base course with a 10-foot straightedge or other device. The variation between any two contacts with the surface.

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3.7 MAINTENANCE

Maintain base course in a satisfactory condition until surfaced or until final acceptance.

***END OF SECTION 02060***

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PORTLAND CEMENT CONCRETE PAVING – 02100

PART 1 – GENERAL

1.1 – Section Includes

Concrete slabs.

1.2 – References

A. ACI 304 – Recommended Practice for Measuring, Mixing, Transporting and Placing Concrete.

B. ASTM C33 – Concrete Aggregates.

C. ASTM C94 – Ready Mix Concrete.

D. ASTM C150 – Portland Cement.

E. ASTM C260 – Air-Entraining Admixtures for Concrete.

F. ASTM C309 – Liquid Membrane-Forming Compounds for Curing Concrete.

G. ASTM C494 – Chemical Admixtures for Concrete.

H. ASTM D1751 – Preformed Expansion Joint Fillers for Concrete Paving and Structural Construction.

I. ASTM D1752 – Preformed Sponge Rubber and Cork Expansion Joint Fillers for Concrete Paving and Structural Construction.

J. PC/COT 601-3.03 – Pima County/City of Tucson Standard Specifications for Public Improvements - Placing Concrete.

1.3 – Submittals For Review

Product Data: Provide data on joint filler, admixtures and curing compounds.

1.4 – Quality Assurance

A. Perform work in accordance with ACI 301 and PC/COT Standard Specification 908.

B. Obtain cementitious materials from same source throughout.

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1.5 – Environmental Requirements

Do not place concrete when base surface temperature is less than 40°F, or surface is wet or frozen.

PART 2 – PRODUCTS

2.1 – Form Materials

Wood or steel form material, profiled to suit conditions.

2.2 – Concrete Materials

As specified in Section 03030 Cast-in-Place Concrete.

2.3 – Accessories

A. Curing Compound: AASHTO M148 (ASTM C309), Type 1, Class A.

B. Joint Fillers: 1/2-inch preformed strips conforming to the requirements of Pima County/City of Tucson Standard Specification 1011.

2.4 – Concrete Mix

A. Mix concrete in accordance with ACI 304. Deliver concrete in accordance with

ASTM C94.

B. Select proportions for normal weight concrete.

C. Provide concrete to the following criteria:

1. Compressive Strength: 3,000 psi at 28 days.

2. Slump: 3 inches.

3. Air entrainment 3-5%.

D. Use accelerating admixtures in cold weather only when approved by the Government.

Use of admixtures will not relax cold weather placement requirements.

E. Use calcium chloride only when approved by the Government.

F. Use set retarding admixtures during hot weather only when approved by the Government.

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3.1 – Examination

A. Verify base conditions under provisions of Section 02020.

B. Verify gradients and elevations of base are correct.

3.1 – Preparation

A. Moisten base to minimize absorption of water from fresh concrete.

B. Notify the Government minimum 24 hours prior to commencement of concreting operations.

3.3 – Forming

A. Place and secure forms to correct location, dimension, profile, and gradient.

B. Assemble formwork to permit easy stripping and dismantling without damaging concrete.

C. Place joint filler vertical in position, in straight lines. Secure to formwork during concrete placement.

3.4 – Placing Concrete

Place concrete in compliance with PC/COT Standard Specifications for Public Improvements Section 601-3.03.

3.5 – Joints

A. General: Construct expansion, weakened-plane (contraction) and construction joints true-to-line with face perpendicular to surface of concrete. Construct transverse joints at right angles to the center line, unless otherwise indicated. Locate joints as shown on the drawings or, if not shown, divide concrete slabs into maximum 12-foot sections in both directions not to exceed a ratio of 4:5, as approved by the Government.

When joining existing structures, place transverse joints to align with previously placed joints, unless otherwise indicated.

B. Weakened-Plane (Contraction) Joints: Provide weakened-plane (contraction) joints, sectioning concrete into areas as noted above or as shown on drawings. Construct weakened-plane joints for a depth equal to at least 1/4 concrete thickness as follows:

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1. Saw-Cut Joints: Saw cuts should be made 12 to 24 hours after finishing. Cut to a depth of 2", clean groove of loose debris.

2. Construction Joints: Place concrete joints at the end of pours and at locations where placement operations are stopped for a period of more than 1/2 hour, except where such pours terminate at expansion joints.

3. Expansion Joints: Provide pre-molded joint filler for expansion joints, in sidewalks and abutting concrete curbs, catch basins, manholes, inlets, structures, walks and other fixed objects, unless otherwise indicated. Depress joint filler 1/2 inch below surface where joint sealer is required. Unless otherwise indicated, provide expansion joints at a maximum of 30 feet on center spacing to divide concrete into maximum 720 SF.

3.6 – Finishing

A. Exterior Slabs and Walks: Medium Broom Finish.

B. Exterior Parking Space: Heavy Broom Finish

C. Place curing compound on exposed concrete surfaces immediately after finishing.

Apply in accordance with manufacturer's instructions.

3.7 – Tolerances

A. Maximum Variation of Surface Flatness: 1/4 inch in 10 feet.

B. Maximum Variation From True Position: 1/4 inch.

3.10 – Field Quality Control

Testing firm will take cylinders and perform slump tests in accordance with ACI 301.

3.11 – Protection

A. Immediately after placement, protect concrete from premature drying, excessive hot or cold temperatures, and mechanical injury.

B. Do not permit traffic over concrete until 75 percent design strength of concrete has been achieved.

*** END OF SPECIFICATION 02100 ***

*** END DIVISION 2 ***

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DIVISION 3 – CONCRETE

CONCRETE FORMWORK – 03010

PART 1 – GENERAL

1.1 – Section Includes

A. Formwork for cast-in place concrete, with shoring, bracing, and anchorage.

B. Openings for other work.

C. Form accessories.

D. Form stripping.

1.2 – Products Installed But Not Furnished Under This Section

A. Section 03030 – Cast-In-Place Concrete: Supply of concrete accessories for placement by this section.

1.3 – Related Sections

A. Section 03020 – Concrete Reinforcement.

B. Section 03030 – Cast-in-Place Concrete.

1.4 – References

A. ACI 301 – Structural Concrete for Buildings.

B. ACI 318 – Building Code Requirements for Reinforced Concrete.

C. ACI 347 – Recommended Practice for Concrete Formwork.

D. PS 1 – Construction and Industrial Plywood.

1.5 – Design Requirements

A. Design, engineer and construct formwork, shoring, and bracing to conform to design and code requirements; resultant concrete to conform to required shape, line, and dimension.

1.6 – Quality Assurance

Perform Work in accordance with ACI 347.

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1.7 – Qualifications

Design of formwork is the responsibility of the Contractor.

1.8 – Regulatory Requirements

Conform to applicable code for design, fabrication, erection, and removal of formwork.

1.9 – Delivery, Storage, And Handling

A. Deliver, store, protect, and handle products to site under provisions of General Conditions.

B. Deliver void forms and installation instructions in manufacturer's packaging.

C. Store off ground in ventilated and protected manner to prevent deterioration from moisture.

1.10 – Coordination

A. Coordinate work under provisions of General Conditions.

B. Coordinate this Section with other Sections of work which require attachment of components to formwork.

C. If formwork is placed after reinforcement resulting in insufficient concrete cover over reinforcement before proceeding, request instructions from Government.

PART 2 – PRODUCTS

2.1 – Wood Form Materials

A. Softwood Plywood: PS 1, C Plugged Grade, Group 2.

B. Lumber: Pine species; construction grade or better; with grade stamp clearly visible.

2.2 – Prefabricated Forms

A. Preformed Steel Forms: Minimum 16 gage matched, tight fitting, stiffened to support weight of concrete without deflection detrimental to tolerances and appearance of finished surfaces.

2.3 – Formwork Accessories

A. Form Ties: Snap-off type, galvanized metal, adjustable length, cone type, with waterproofing washer, free of defects that could leave holes larger than 1 inch in concrete surface.

- 32 -

B. Form Release Agent: Colorless mineral oil which will not stain concrete, or absorb moisture, or impair natural bonding or color characteristics of coating intended for use on concrete.

C. Dovetail Anchor Slot: Galvanized steel, 22 gage thick, foam filled, release tape sealed slots, anchors for securing to concrete formwork.

D. Nails, Spikes, Lag Bolts, Through Bolts, Anchorages: Sized as required, of sufficient strength and character to maintain formwork in place while placing concrete.

E. Waterstops: Rubber, minimum 1,750 psi tensile strength, minimum 50°F to plus 175°F working temperature range, maximum possible lengths, ribbed profile, preformed corner sections, heat welded jointing.

PART 3 – EXECUTION

3.1 – Examination

A. Government to approve all forms at least 4 hours prior to placing concrete. Notify Government 24 hours in advance of pouring concrete.

B. Verify lines, levels, and centers before proceeding with formwork. Ensure that dimensions agree with drawings.

3.2 – Earth Forms

A. Hand trim sides and bottom of earth forms. Remove loose soil prior to placing concrete.

3.3 – Erection Formwork

A. Erect formwork, shoring, and bracing to achieve design requirements, in accordance with requirements of ACI 301.

B. Provide bracing to ensure stability of formwork. Shore or strengthen formwork subject to over stressing by construction loads.

C. Arrange and assemble formwork to permit dismantling and stripping. Do not damage concrete during stripping. Permit removal of remaining principal shores.

D. Align joints and make watertight. Keep form joints to a minimum.

E. Obtain approval before framing openings in structural members which are not indicated on Drawings.

F. Install void forms in accordance with manufacturer's recommendations. Protect forms from moisture or crushing.

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3.4 – Application - Form Release Agent

A. Apply form release agent on formwork in accordance with manufacturer's recommendations.

B. Apply prior to placement of reinforcing steel, anchoring devices, and embedded items.

C. Do not apply form release agent where concrete surfaces will receive special finishes or applied coverings which are affected by agent. Soak inside surfaces of untreated forms with clean water. Keep surfaces coated prior to placement of concrete.

3.5 – Inserts, Embedded Parts, And Openings

A. Provide formed openings where required for items to be embedded in passing through concrete work.

B. Locate and set in place items which will be cast directly into concrete.

C. Coordinate with work of other sections in forming and placing openings, slots, reglets, recesses, sleeves, bolts, anchors, other inserts, and components of other Work.

D. Install accessories in accordance with manufacturer's instructions, straight, level, and plumb. Ensure items are not disturbed during concrete placement.

E. Install water stops continuous without displacing reinforcement. Heat seal joints watertight.

F. Provide temporary ports or openings in formwork where required to facilitate cleaning and inspection. Locate openings at bottom of forms to allow flushing water to drain.

G. Close temporary openings with tight fitting panels, flush with inside face of forms, and neatly fitted so joints will not be apparent in exposed concrete surfaces.

3.6 – Form Cleaning

A. Clean forms as erection proceeds, to remove foreign matter within forms.

B. Clean formed cavities of debris prior to placing concrete.

C. Flush with water or use compressed air to remove remaining foreign matter. Ensure that water and debris drain to exterior through clean-out-ports.

D. During cold weather, remove ice and snow from within forms. Do not use de-icing salts. Do not use water to clean out forms, unless formwork and concrete construction proceed within heated enclosure. Use compressed air or other means to remove foreign matter.

- 34 -

3.7 – Formwork Tolerances

Construct formwork to maintain tolerances required by ACI 301.

3.8 – Field Quality Control

A. Inspect erected formwork, shoring, and bracing to ensure that work is in accordance with formwork design, and that supports, fastenings, wedges, ties, and items are secure.

B. Do not reuse wood formwork more than 3 times for concrete surfaces to be exposed to view.

C. Do not patch formwork.

3.9 – Form Removal

A. Do not remove forms or bracing until concrete has gained sufficient strength to carry its own weight and imposed loads.

B. Loosen forms carefully. Do not wedge pry bars, hammers, or tools against finish concrete surfaces scheduled for exposure to view.

C. Store removed forms in manner that surfaces to be in contact with fresh concrete will not be damaged. Discard damaged forms.

*** END OF SPECIFICATION 03010 ***

- 35 -

CONCRETE REINFORCEMENT – 03020

PART 1 – GENERAL

1.1 – Section Includes

Reinforcing steel bars, wire fabric, and accessories for cast-in-place concrete.

1.2 – Related Sections

A. Section 03010 – Concrete Formwork.

B. Section 03030 – Cast-in-Place Concrete.

1.3 – References

A. ACI 301 – Structural Concrete for Buildings.

B. ACI 318 – Building Code Requirements for Reinforced Concrete.

C. ACI SP-66 – American Concrete Institute – Detailing Manual.

D. ANSI/ASTM A82 – Cold Drawn Steel Wire for Concrete Reinforcement.

E. ANSI/ASTM A184 – Fabricated Deformed Steel Bar Mats for Concrete Reinforcement.

F. ANSI/ASTM A185 – Welded Steel Wire Fabric for Concrete Reinforcement.

G. ANSI/AWS D1.4 – Structural Welding Code for Reinforcing Steel.

H. ASTM A615 – Deformed and Plain Billet Steel Bars for Concrete Reinforcement.

I. AWS D12.1 – Welding Reinforcement Steel, Metal Inserts, and Connections in Reinforced Concrete Construction.

1.4 – Submittals

Manufacturer's Certificate: Certify that products meet or exceed specified requirements.

1.5 – Quality Assurance

Perform Work in accordance with ACI 301, ACI SP-66 and ACI 318.

1.6 – Coordination

A. Coordinate work under provisions of General Conditions.

B. Coordinate with placement of formwork, formed openings, and other Work.

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C. Masonry Joint Reinforcement: ASTM A82, unfinished.

PART 2 – PRODUCTS

2.1 – Reinforcement

A. Reinforcing Steel: ASTM A615, 60 ksi yield grade, as noted on drawings; deformed billet steel bars, unfinished.

B. Welded Steel Wire Fabric: ASTM A185 plain type; in flat sheets; unfinished.

2.2 – Accessory Materials

A. Tie Wire: Minimum 16 gauge annealed type.

B. Chairs, Bolsters, Bar Supports, Spacers: Sized and shaped for strength and support of reinforcement during concrete placement conditions including load bearing pad on bottom to prevent vapor barrier puncture.

C. Special Chairs, Bolsters, Bar Supports, Spacers Adjacent to Weather Exposed Concrete Surfaces: Plastic coated steel type; size and shape as required.

2.3 – Fabrication

A. Fabricate concrete reinforcing in accordance with ACI SP-66 and ACI 318.

B. Weld reinforcement in accordance with ANSI/AWS D1.4 and ANSI/AWS D12.1.

C. Locate reinforcing splices not indicated on drawings, at point of minimum stress.

PART 3 – EXECUTION

3.1 – Placement

A. Place, support, and secure reinforcement against displacement. Do not deviate from required position.

B. Do not displace or damage vapor barrier.

C. Accommodate placement of formed openings.

D. Conform to ACI 318 code for concrete cover over reinforcement.

E. Chairs to be used for all welded-wire mesh in concrete slabs.

*** END OF SPECIFICATION 03020 ***

- 37 -

CAST-IN-PLACE CONCRETE – 03030

PART 1 – GENERAL

1.1 – Quality Assurance

1. Standards: Concrete work shall conform to the latest edition of the following standards and to the Contract Drawings and Specifications.

2. Uniform Building Code, as adopted and modified by the local governing authority.

3. American Concrete Institute "Manual of Concrete Practice", and publication ACI 318 "Building Code Requirements for Reinforced Concrete."

4. American Society for Testing and Materials, Standards as referenced herein.

A. Allowable Tolerances: Flatwork true to plane with maximum deviation of 1/4" in 10 feet, measured in any direction.

1.2 – Submittals

Ready-mix delivery tickets shall be given to the Project Superintendent for examination by the Government in three copies. The tickets shall contain the following information.

1. Number of cubic yards in batch.

2. Quantity and description of admixtures used.

3. Maximum size of aggregate.

4. Design compressive strength.

5. Gallons of water added at the site.

PART 2 – PRODUCTS

2.1 – Materials

A. Cement: Portland Cement, Type II, ASTM C150. Concrete shall have integral color to match existing slabs.

B. Aggregate

1. Standard weight aggregates conforming to requirements of ASTM C33.

2. Uniformly graded, clean and durable material free of organic matter or other deleterious substances.

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3. The maximum size used in a particular location shall be consistent with the form and dimensions of the section being placed and with the method of compaction.

The aggregate sizes shall be such as will produce dense, uniform concrete, free of rock pockets, honey combs and other irregularities unacceptable to an Architectural finished surface.

C. Water: Potable, free of harmful acids, alkalis, oils and organic substances.

D. Admixtures: No admixtures shall be used unless specifically requested by the General Contractor and approved by the Government. When used, the Contractor shall provide evidence from an independent testing laboratory which assures that the admixture will have no deleterious effect upon reinforced concrete; and which indicates chemical compounds, effects upon strength, durability, and resistance to weathering and wear, and curing time.

E. Expansion Joint Filler

1. Non-extruding, preformed type; thickness as shown on drawings.

2. Fiber joint filler may be used only with a rubber asphalt sealer. Do not use fiber material with a chemically-cured sealant.

F. Control Joint: Propose layout for Government approval.

2.2 – Mixes

A. Ready Mix Concrete: Transit mixed concrete shall conform to the requirements of Standard Specifications for Ready-Mix Concrete, ASTM C94, Alternative 2.

B. Proportions: Proportions of cement, aggregates and water shall be such as to produce a concrete that will work into all corners and angles of forms, and around reinforcement and inserts; and that will not segregate. Proportions shall be as required within limits specified and shall produce concrete of strength and durability required. Excess free surface water is not permitted.

C. Strength: All concrete to be minimum 3000 psi at 28 days, or as otherwise specified on the plans.

D. Temperature: Concrete when deposited shall have a temperature above 50°F and below 95°F. Design shall provide for duration and type of conveyance and handling.

E. Air Entrainment: All concrete shall have 3-5% air entrainment.

PART 3 – EXECUTION

3.1 – Subgrade Preparation

Subgrades shall be shaped, dressed, moistened and compacted, as required. Test the subgrade for crown, elevation, and density in advance of placing pavement. Remove and replace soft or unsuitable material with approved material. Bring low sections, holes, or depressions to the

- 39 -required grades with approved material, shape the entire sub-grade to line, grade and cross , and thoroughly compact as specified.

3.2 – Preparation for Concrete Placement

A. Place embedded items, and expansion strips as indicated; maintain items securely in place. The Contractor shall give reasonable and adequate advance notice of concrete placement to all subcontractors and concerned parties who must place…