Combined Toilet Site Work Spec Revised3.pdf

KERN RIVER RD TOILET SITE WORK PROJECT

LIST OF SPECIFICATIONS

DIVISION 1 – GENERAL REQUIREMENTS

Section 01010 – Summary of Work Section 01301 – Mobilization

DIVISION 2 – SITE WORK

Section 02100 – Demolition Section 02320 – Earthwork

DIVISION 3 – CONCRETE

Section 03300 – Cast-in-Place Concrete

01010 - 1

SECTION 01010

SUMMARY OF WORK

PART 1 - GENERAL

1.1 DESCRIPTION OF WORK

Furnish all labor, equipment, and material to accomplish the work under this contract at three locations around Lake Isabella on Sequoia National Forest land. Work includes but is not limited to the following major items:

A. Sewage Systems:

1. Demolish and dispose sewer systems at eight (8) toilet locations (one at Camp 9 CG and seven at Tillie Creek CG). Pump and rinse out septic tanks; drill a 4 inch hole in the bottom of the vault for drainage; demolish and remove all septic tank components to 2 feet below ground surface; demolish top of septic tank; and backfill and compact the septic tanks with approved backfill to flush with adjacent grade. Three sewer systems at Tillie Creek CG include dosing tanks with the septic tanks; to be demolished similar to septic tanks.

B. Accessible Sidewalks at Toilets:

1. Construct accessible sidewalks at double vault toilet buildings as listed below at three locations around Lake Isabella as Shown on the Drawings, including earthwork, formwork, reinforcement, concrete placement, finishing, and cleanup.

a. Camp 9 CG –

i. One location with pairs of double vault toilets (double doubles)

ii. One location with individual double vault toilets (Optional Bid Item)

b. South Fork Recreation Area –

i. One location with a pair of double vault toilets (double double)

c. Tillie Creek CG –

i. Seven locations with pairs of double vault toilets (double doubles)

1.2 MEASUREMENT AND PAYMENT

A. Unit of Measurement:

1. Each (EA). One complete assembly or unit, as described in the specifications;

furnished and installed.

2. Linear Foot (LF). One unit of work measuring one foot in length parallel to the work surface, regardless of width or thickness of material.

3. Lump Sum (LS). One complete unit, which may consist of one or more parts.

4. Square Foot (SF). One unit of work measuring one foot by one foot square, parallel to the work surface.

B. Method of Measurement

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1. Actual Quantity (AQ). These quantities denote a unit of measurement based on measurement of actual work completed in the field and measured for payment.

2. Lump Sum Quantities (LSQ). These quantities denote one complete unit of work as required or described in the Contract, including necessary materials, equipment, and labor to complete the Work. They will not be measured.

C. Payment:

1. For each individual item listed in the Schedule of Items, payment shall be full compensation for all work related to the particular item in accordance with these specifications, as shown on the drawings, and as staked in the field.

2. Measurement and payment for contract work shall be made only for and under those pay items included in the SCHEDULE OF ITEMS. All other work and materials shall be considered incidental or as included in the payment for items shown.

D. Descriptions of Bid (Pay) Items - Descriptions of bid items are an abbreviated explanation of pay items and may not include all requirements to complete the Work required for each item. Contractor should refer to the Schedule of Items, Contract Sections, Drawings, and Specifications for complete details. The accepted quantities will be paid for at the unit price as shown in the SCHEDULE OF ITEMS.

1.3 SPECIFICATIONS, DRAWINGS, AND SUBMITTALS

A. This project requires the Contractor to supply all labor, materials, equipment, tools, transportation, freight and delivery, identify existing underground utilities and all necessary licenses and permits required to complete the project in conformity with the drawings and specifications, and in accordance with the provisions of the contract.

B. The project is located on the Kern River Ranger District of the Sequoia National Forest.

See site map for reference.

C. The specifications establish the construction procedures and materials to be employed throughout. All work shall be completed in accordance with these specifications and project drawings.

1.4 MEALS AND LODGING

A. Meals or lodging will not be available at Forest Service facilities.

1.5 CONSTRUCTION ADMINISTRATION

A. No dumping of waste products of any type will be permitted. All waste shall be transported to an approved sanitary landfill for disposal off Forest Service land.

B. No on-site sanitary facilities are available for Contractor’s use. Contractor shall provide facilities for construction employees. Human waste disposal shall conform to the State of California rules and regulations governing such disposal.

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C. Materials for construction, construction vehicles and equipment may be stockpiled and staged at the project site in an area designated by the Contracting Officer.

D. The Contractor shall take precautions to protect all work and materials during the construction period.

E. The Contractor is responsible for safeguarding the public and employees from construction operations.

F. Contractor shall comply with the provisions of Contract Section C.6 SPECIAL

CONDITIONS AFFECTING THE WORK.

1.7 EROSION CONTROL

A. This work consists of temporary measures to control soil erosion and water pollution, through the use of berms, dikes, dams, sediment basins, silt fences, brush barriers, fiber mats, netting, gravel, mulches, grasses, slope drains, and other devices or methods.

B. Temporary erosion and pollution control measures required due to the Contractor's negligence, carelessness, or failure to install permanent controls as scheduled shall be performed by the Contractor at his own expense.

C. Erosion control features shall be maintained by the Contractor during the contract.

Temporary controls shall be dismantled and properly disposed of off the Forest Land.

1.7 CONSTRUCTION SEQUENCE

A. The project shall be completed within the time frame established by the terms of this contract and according to the approved Schedule of Work.

B. Depending on conditions, normal fire restrictions may apply to activities in this project.

1.8 SITE FINISHING

A. Conserve native topsoil that is free from large roots, branches and inorganic material such as concrete and asphalt for use as SHOWN ON THE DRAWINGS or as designated by the Contracting Officer. Spread conserved topsoil in locations designated by the Contracting Officer.

B. Fill depressions caused by demolition operations with satisfactory soil material, unless further excavation or earthwork is indicated.

C. Place fill material in horizontal layers not exceeding 6-inches loose depth and thoroughly compact to a density equal to adjacent original ground.

D. All areas shall be sloped and contoured for free drainage without ponding of water, and scarified 6” deep minimum to promote the growth of natural vegetation.

1.9 PROJECT SITE CLEANUP

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A. Project site cleanup includes the removal and proper disposal of all construction trash, debris, residue, and asphalt and concrete slag off of National Forest Land. Items such as miscellaneous construction materials are considered the property of the Contractor and shall be removed from the project site.

B. All spills of petroleum products including leak spots from parked vehicles shall be removed and properly disposed according to all Local, State, and Federal rules, regulations, and laws governing such disposal.

C. During the Work, the Contractor is required to furnish dumpsters or other trash receptacles and to empty such containers either as they become full or weekly, whichever is more frequent. The Contractor shall not place materials of any kind into private or Government trash bins or dumpsters.

D. All suitable excavated material shall be incorporated into the work when possible.

Additional suitable borrow material is to be obtained from a "Commercial Source" if enough select backfill is not available. Unsuitable excavated material must be disposed of by the contractor, as an incidental expense with no extra payment. All unsuitable excavated material disposed of by contractor must be delivered off of the project site and off of National Forest Land.

E. All construction debris from construction of sitework, and demolition of existing conditions, shall be cleaned up and disposed of off of National Forest Land. All clearing debris shall be scattered within the clearing limits after utilities construction is complete, and used as a soil stabilizer to help prevent erosion. All vegetative matter including roots, stumps, and logs must be disposed of off National Forest Land.

1.10 PROJECT CLOSEOUT

A. Removal of Protection: Remove temporary protection and facilities installed for protection of the Work during construction.

B. Compliance: Comply with regulations of authorities having jurisdiction and safety standards for cleaning. Do not burn waste materials. Do not bury debris or excess materials on the Government's property. Do not discharge volatile, harmful, or dangerous materials into drainage systems. Remove waste materials from the site and dispose of lawfully.

Clean the site of rubbish, litter, and other foreign substances. Sweep paved areas broom clean; remove stains, spills, and other foreign deposits. Rake grounds that are neither paved nor planted to a smooth, even-textured surface.

END OF SECTION

01301 - 1

SECTION 01301

MOBILIZATION

PART 1 - GENERAL

1.1 DESCRIPTION

A. This Work consists of moving personnel, equipment, material, and incidentals to the project and performing all work necessary before beginning work at the project site. Mobilization includes the obtaining of all permits, insurance, and bonds.

1.2 PERMITS

A. The Government does not purchase building, electrical, plumbing, or encroachment permits.

The Contractor will not be reimbursed for such permits. The Contractor, under its program for project quality control, may request and pay for inspection of these items from the local jurisdiction. All other permits remain the Contractor’s responsibility to obtain.

B. The contractor is responsible for the fees and permits required to move oversize loads on state and local roads.

1.3 MEASUREMENT AND PAYMENT

A. Method of Measurement: Lump Sum Quantity (LSQ).

B. Unit of Measurement: Lump Sum. The Government will only pay for the initial project mobilization. Additional project mobilizations, regardless of cause, will not be paid.

Mobilization is shown on the SCHEDULE OF ITEMS as one pay item: Mobilization.

C. Progress payment for Mobilization lump sum will be paid as follows:

1. Bond premiums will be reimbursed according to FAR Clause 52.232-5 Payments Under

Fixed-Price Construction Contracts, after receipt of the evidence of payment.

2. When 5 percent of the original contract amount is earned from other bid items, 50 percent of the mobilization item, or 5 percent of the original contract amount, whichever is less, will be paid.

3. When 10 percent of the original contract amount is earned from other bid items, 100 percent of the mobilization item, or 10 percent of the original contract amount, whichever is less, will be paid.

4. Any portion of the mobilization item in excess of the 10 percent of the original contract amount will be paid after final acceptance.

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SECTION 02100

DEMOLITION

PART 1 GENERAL

1.1 SCOPE

Furnish all labor, equipment, and material to accomplish the work under this contract at three locations around Lake Isabella on Sequoia National Forest land. Work includes but is not limited to demolition of eight sewer systems as shown on the schedule of items and described in Section C Description of Work and Section 01010 Summary of Work.

1.2 RELATED SECTIONS

Section 01010 - Summary of Work

PART 2 PRODUCTS

2.1 BACKFILL

A. Approved select materials suitable for “bucket” or “wheel” or “vibro plate” compaction.

PART 3 EXECUTION

3.1 SITE UTILITIES

A. All utilities shall be properly disconnected, capped, or otherwise rendered inoperable in such a manner as to provide safe operation of the remaining site utilities.

3.2 DEMOLITION

A. Demolish and remove eight (8) septic systems at locations in two campgrounds. Three systems at Tillie Creek CG include both septic tanks and sewage dosing tanks. Pump and rinse out septic tanks and dosing tanks; drill a 4 inch hole in the bottom of the tank or vault for drainage; demolish and remove all septic and dosing tank components to 2 feet below ground surface; demolish top of septic and dosing tanks; and backfill and compact the septic and dosing tanks with approved backfill to flush with adjacent grade.

3.3 DISPOSAL – CLEAN UP

A. All trash, debris, items designated to be removed, and other waste generated as a result of demolition under this specification become property of the Contractor unless otherwise specified and shall be removed from Forest Service lands and properly

02100 - 2 disposed of in accordance with all applicable Federal, State, and Local Government laws, regulations, rules and/or codes.

B. All natural excavated material shall be incorporated into the work when possible.

Additional borrow material may be obtained on site, if needed, as approved by the Contracting Officer. If borrow material is not available, an approved commercial source will be used.

C. All trenches, holes, and pits created to remove septic tanks, dosing tanks, toilet building, and utilities shall be backfilled and compacted. At least a 6-inch overlay will be placed over all excavated areas to allow for settlement. The site shall be smoothed and contoured to provide free drainage without ponding of surface water. All disturbed or bare areas shall be scarified 6” deep minimum to encourage the growth of natural vegetation.

02320 - 1

SECTION 02320

EARTHWORK

PART 1 - GENERAL

1.1 DESCRIPTION

A. This work consists of providing equipment and labor necessary to complete minor site grading;

furnish and place fill, backfill, sub-base and base materials; trenching and backfill; compaction and grading.

B. Earthwork shall include but is not limited to the following:

1. Excavate to levels and lines required for foundations and other subgrade work.

2. Fill and backfill to grades indicated, including the importing of approved off-site material.

3. Excavate unsuitable subgrade material and replace with acceptable material.

4. Compact subgrade, backfill material, and granular rock base where required.

5. Rough and finish grade to levels and lines indicated.

6. Finish grading.

7. Provide erosion, sedimentation, and dust control in accordance with local ordinance and

State of California requirements.

1.02 Related Sections

Section 01010 – Summary of Work

1.03 Measurement and Payment

Earthwork is incidental to other pay items. It will not be measured for pay as a separate item.

PART 2 - PRODUCTS

2.1 BACKFILL MATERIALS

A. GENERAL

1. The Contracting Officer shall approve all backfill material. Materials used for backfill shall be free from frozen or organic matter and contain no deleterious substances.

Backfill materials may be obtained from on site excavation and commercial sources.

Table 02320-1

Classification and Standards for Trench Backfill

Item Material Tolerance

Select Bedding Fine Sand or Soil 100% passing the No. 8 Sieve, without sharp chips or points.

Secondary Backfill

(Shading or Conduit

Backfill)

Excavated

Material

100% passing the 1-inch Sieve, without sharp chips or points.

Final Backfill Excavated

Material

Material meeting the quality requirements of “Secondary

Backfill” above and containing no rocks larger than 4-inches in greatest dimension.

B. SAND

02320 - 2

1. Use only clean natural sand, free of organic debris and salts.

C. SURPLUS EXCAVATION

1. Acceptable surplus excavation shall be obtained from on-site excavation and demolition activities that are well graded with no rocks having a dimension greater than 2-inches.

2. Excess material meeting the requirements of “General Fill” may also be used as surplus excavation.

2.2 COMPACTION EQUIPMENT

A. Compaction equipment shall be capable of obtaining compaction requirements without detrimentally affecting the compacted material. The compacting equipment may be of any type, provided they are capable of achieving the compaction for each lift of material as specified and meet the minimum requirements contained herein.

B. Minimum requirements for rollers are as follows:

1. Steel-wheel rollers, other than vibratory, shall be capable of exerting a force of not less than 250 pounds per inch of width of the compression roll or rolls.

2. Vibratory steel-wheel rollers shall have a minimum weight of 6 tons. The compactor shall be equipped with amplitude and frequency controls and specifically designed to compact the material on which it is used.

C. Pneumatic-tire rollers shall have smooth tread tires of equal size that provide a uniform compacting pressure for the full width of the roller and shall meet the following minimum requirements:

2. Self propelled rollers:

a. Shall exert a force that exceeds 200 pounds per linear inch of rolling width.

PART 3 - EXECUTION

3.1 GENERAL EXCAVATION AND DISPOSAL

A. Topographic drawings of the project are intended for reference only. Contractor shall verify all actual site conditions, levels, and grades prior to beginning work and inform the Contracting

Officer of any discrepancies that exist.

B. Clearing and grubbing shall be accomplished before excavation or backfill placement begins.

Slash disposal and grubbing of stumps, when approved by the Contracting Officer, may proceed concurrently with excavation, and the burning of slash, if burning is authorized by the

Contracting Officer, may be delayed until weather permits. Excavation and placement operations shall be conducted so slash material to be treated will not be incorporated in the embankment.

C. All material to be excavated shall be unclassified and shall include earth fills, gravels, boulders, debris, and any other materials encountered in excavation and grading operations.

D. All suitable, excavated material shall be used in the construction of embankments, subgrades, shoulders, slopes, bedding, and backfill for structures and for other purposes as SHOWN ON

THE DRAWINGS and SPECIFIED HEREIN. Excess suitable material shall be used throughout the project as SHOWN ON THE DRAWINGS and as designated by the Contracting

Officer.

E. Material encountered in the excavation, suitable for topsoil, cushion, road finishing, or other purposes, may be conserved and utilized as such when approved by the Contracting Officer.

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F. Rocks too large to be incorporated into the embankment shall be broken for incorporation into the embankment, maneuvered to the face of the embankment and embedded so that they will not roll or obstruct the use and maintenance of the roadbed, or moved to locations approved by the Contracting Officer.

G. Water encountered during excavation operations shall be removed from the excavation as required. Separate payment will not be made for pumping of water from trenches or for excavation of material rendered unsuitable as a result of water encountered.

3.2 EXISTING IMPROVEMENTS

A. Maintain and protect utility service lines passing through the work area.

B. The Contractor's attention is directed to the existence of pipe and other underground utilities or improvements, which may or may not be shown on the drawings. All reasonable precautions shall be taken to preserve and protect any such improvements. The contractor shall be responsible for contacting USA at 1-800-642-2444 48 hours prior to locate utilities before excavating.

C. Where existing utilities or improvements interfere with the work, they shall not be removed, relocated, or otherwise disturbed unless authorized by the Contracting Officer.

3.3 EXCAVATION FOR UTILITY TRENCHES

A. Conform to the requirements for general excavation and the following:

1. Trenches shall be AS SHOWN ON THE DRAWINGS for properly laying utility lines.

Water line trenches shall be uniformly graded to avoid high points that would necessitate the placing of air valves in the water lines. Trenches shall be of a depth to provide the minimum cover over the utility line SHOWN ON THE DRAWINGS.

2. All roots shall be cut and removed from trenches. Bottoms of trenches shall be accurately graded to an elevation below the grade line of the proposed utility line as

SHOWN ON THE DRAWINGS.

3.4 EXCAVATION FOR CONCRETE STRUCTURES

A. Conform to the requirements for general excavation and the following:

1. Depth of excavation for slabs on grade shall be sufficient to allow for aggregate base, vapor barrier, sand, and slab thickness AS SHOWN ON THE DRAWINGS.

3.5 BACKFILL PLACEMENT

A. GENERAL BACKFILL PLACEMENT

1. Fill material shall be placed and compacted at moisture content suitable for compaction.

2. Excessively wet material that is otherwise suitable for embankment shall be field drained and dried to the moisture content suitable for compaction.

3. No fill material shall be placed when free water is standing on the surface of the area where the fill is to be placed and no compaction of fill will be permitted with free water on any point of the surface of the fill to be compacted.

4. Any fill containing organic materials or other unacceptable material previously described shall be removed and replaced with approved fill material prior to compaction.

5. The Contractor must obtain approval from the Contracting Officer prior to backfilling.

6. Unless otherwise specified, all backfill not accessible to roller compaction shall be compacted by power tampers, vibratory compactors or other approved means to the degree of compaction specified.

02320 - 4

B. BACKFILL PLACEMENT FOR UTILITY TRENCHES

1. LOWER PORTION OF UTILITY TRENCHES

a. Bedding material shall be used to provide a cushion below, adjacent to, and above the utility line as SHOWN ON THE DRAWINGS.

b. Bedding material shall be deposited in six-inch-maximum-thickness layers.

c. The bedding material shall be compacted by power tampers until visual displacement ceases.

2. MIDDLE PORTION OF UTILITY TRENCHES

a. Secondary backfill placed on top of the utility shall be used to provide conduit protection.

b. Secondary backfill material shall be deposited in layers not to exceed eight inches.

c. The Secondary backfill material shall be compacted by power tampers until visual displacement ceases.

3. UPPER PORTION OF UTILITY TRENCHES

a. Backfill material in the upper portion of trenches passing under areas of proposed sidewalks, and parking lots shall be comprised of materials placed and compacted according to the same requirements as the surrounding base.

b. Final backfill material in the upper portion of trenches passing through areas not under proposed improvements shall be comprised of final backfill material.

c. Final backfill material shall be deposited in layers not to exceed 8-inches.

d. Final backfill shall be compacted to a density at least equal to that of the adjacent undisturbed native soil.

e. Warning Tape shall be installed in the utility trench as SHOWN ON THE

DRAWINGS.

C. BACKFILL PLACEMENT FOR SIDEWALKS AND PARKING LOTS

1. GENERAL

a. Embankments shall be constructed of suitable material and compacted uniformly by rollers or power tampers until visual displacement ceases.

2. LAYER PLACEMENT

a. Embankment shall be placed in horizontal layers not exceeding 6 inches (loose measure) and compacted. Each embankment layer shall be leveled, smoothed, and compacted before placement of subsequent layers.

b. Placing individual rocks greater than 9 inches in diameter will not be permitted.

c. Material shall be at moisture content suitable for attaining the required density.

d. Cohesive soils that have become hard or lumpy, or that have been piled and have become dry, shall be broken up and properly conditioned for moisture content immediately before placement.

e. Surfaces on which compacted fill will be placed shall be wetted or dried as may be required to obtain the compaction specified.

3. FINISHING SLOPES

a. Finished slopes shall conform reasonably to the lines SHOWN ON THE

DRAWINGS and the approved final locations STAKED ON THE GROUND.

The finished slope shall be left in a roughened condition to facilitate the establishment of vegetative growth. Loose rock, loose debris, and other loose material, each of which is larger than 6 inches in diameter, shall be removed from the slope unless otherwise SHOWN ON THE DRAWINGS.

D. BACKFILL PLACEMENT FOR CONCRETE STRUCTURES

1. GENERAL

a. Prior to placement of backfill, all forms shall be removed and the excavation be cleaned of all trash, debris and unsuitable material.

b. Where self-propelled or power mechanical compaction is used, the uncompacted thickness of each lift of backfill shall be not more than 6 inches.

02320 - 5

c. Where hand-operated mechanical compaction is used, the backfill shall be placed in layers of not more than six inches.

03300 - 1

SECTION 03300

CAST-IN-PLACE CONCRETE

PART 1 – GENERAL

1.1 DESCRIPTION

A. The work of this section consists of constructing concrete sidewalks around prefabricated concrete toilet buildings as Shown on the Drawings.

1.2 RELATED DOCUMENTS

A. Drawings and general provisions of the Contract, and Division 1 Specification Section, apply to this Section.

1.3 RELATED SECTIONS

Section 01010 – Summary of Work Section 02320 – Earthwork

1.4 MEASUREMENT AND PAYMENT

The concrete material will be paid for by Lump Sum for construction of accessible sidewalks and accessible parking spaces at each location listed below, including earthwork, compaction, formwork, steel reinforcing, concrete supply, placement, and finishing; and clean up.

a. Camp 9 CG –

i. One location with a pair of double vault toilets (double doubles)

ii. One location with individual double vault toilet (Optional work item)

b. South Fork Recreation Area –

i. One location with a pair of double vault toilets (double double)

c. Tillie Creek CG –

i. Seven locations with pairs of double vault toilets (double doubles)

1.5 SUMMARY

This Section specifies cast-in place concrete, including formwork, reinforcement, concrete materials, mix design, placement procedures, and finishes. This work includes cast-in-place concrete for building foundations, slabs-on-grade, exterior and interior flat work.

1.6 SUBMITTALS

A. Product Data: For each type of manufactured material and product indicated.

B. Design Mixes: For each concrete mix. Include alternate mix designs when characteristics of materials, project conditions, weather, test results, or other circumstances warrant adjustments.

1. Indicate amounts of mix water to be withheld for later addition at Project site.

1.7 QUALITY ASSURANCE

03300 - 2

A. Manufacturer Qualifications: A firm experienced in manufacturing ready-mixed concrete products complying with ASTM C 94 requirements for production facilities and equipment.

B. Testing Agency Qualifications: An independent testing agency, acceptable to authorities having jurisdiction, qualified according to ASTM C 1077 and ASTM E 329 to conduct the testing indicated, as documented according to ASTM E 548.

1. Personnel conducting field tests shall be qualified as ACI Concrete Field Testing Technician, Grade 1, according to ACI CP-1 or an equivalent certification program.

C. Source Limitations: Obtain each type or class of cementitious material of the same brand from the same manufacturer's plant, each aggregate from one source, and each admixture from the same manufacturer.

D. ACI Publications: Comply with the following, unless more stringent provisions are indicated:

1. ACI 301, "Specification for Structural Concrete."

2. ACI 117, "Specifications for Tolerances for Concrete Construction and Materials."

1.8 DELIVERY, STORAGE, AND HANDLING

A. Deliver, store, and handle steel reinforcement to prevent bending and damage.

1. Avoid damaging coatings on steel reinforcement.

2. Repair damaged epoxy coatings on steel reinforcement according to ASTM D 3963.

PART 2 – PRODUCTS

2.1 FORM-FACING MATERIALS

A. Smooth-Formed Finished Concrete: Form-facing panels that will provide continuous, true, and smooth concrete surfaces. Furnish in largest practicable sizes to minimize number of joints.

1. Plywood, metal, or other approved panel materials.

B. Chamfer Strips: Wood, metal, PVC, or rubber strips, 3/4 by 3/4 inch, minimum.

C. Form-Release Agent: Commercially formulated form-release agent that will not bond with, stain, or adversely affect concrete surfaces and will not impair subsequent treatments of concrete surfaces.

2.2 STEEL REINFORCEMENT

A. Reinforcing Bars: ASTM A 615, Grade 60, deformed.

B. Plain-Steel Welded Wire Fabric: ASTM A 185, fabricated from as-drawn steel wire into flat sheets.

2.3 REINFORCEMENT ACCESSORIES

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A. Bar Supports: Bolsters, chairs, spacers, and other devices for spacing, supporting, and fastening reinforcing bars and welded wire fabric in place. Manufacture bar supports according to CRSI's "Manual of Standard Practice" from steel wire, plastic, or precast concrete or fiber-reinforced concrete of greater compressive strength than concrete.

B. Joint Dowel Bars: Plain-steel bars, ASTM A 615, Grade 60. Cut bars true to length with ends square and free of burrs.

2.4 CONCRETE MATERIALS

A. Portland Cement: ASTM C 150, Type I/II.

B. Normal-Weight Aggregate: ASTM C 33, uniformly graded, and as follows:

1. Class: Severe weathering region, but not less than 3S.

2. Nominal Maximum Aggregate Size: 3/4 inch.

C. Water: Potable and complying with ASTM C 94.

2.5 ADMIXTURES

A. General: Admixtures certified by manufacturer to contain not more than 0.1 percent water-soluble chloride ions by mass of cementitious material and to be compatible with other admixtures and cementitious materials. Do not use admixtures containing calcium chloride.

B. Air-Entraining Admixture: ASTM C 260.

C. Water-Reducing Admixture: ASTM C 494, Type A.

D. Calcium chloride or admixtures containing more than 0.1% chloride ions are not permitted.

1. Available Products: Subject to compliance with requirements, products that may be incorporated into the Work include, but are not limited to, the following:

a. Catexol 1000CL; Axim Concrete Technologies.

b. MCI 2000 or MCI 2005; Cortec Corporation.

c. DCI or DCI-S; W. R. Grace & Co., Construction Products Div.

d. Rheocrete 222+; Master Builders, Inc.

e. FerroGard-901; Sika Corporation.

f. Retarders – Shall be submitted to the Contracting Officer 10 days prior to pouring concrete.

2.6 VAPOR RETARDERS

A. Vapor Retarder: ASTM E 1745, Class A, three-ply, nylon- or polyester-cord-reinforced, high-density polyethylene sheet; laminated to a nonwoven geotextile fabric, 30 mils thick.

1. Available Product: Subject to compliance with requirements, a product that may be incorporated into the Work includes, but is not limited to, "Griffolyn T-65G" by Reef Industries Inc.

03300 - 4

B. Granular Fill: Clean mixture of crushed stone or crushed or uncrushed gravel;

ASTM D 448, Size 57, with 100 percent passing a 1-1/2-inch sieve and 0 to 5 percent passing a No. 8 sieve.

2.7 CURING MATERIALS

A. Absorptive Cover: AASHTO M 182, Class 2, burlap cloth made from jute or kenaf, weighing approximately 9 oz./sq. yd. dry.

B. Moisture-Retaining Cover: ASTM C 171, polyethylene film or white burlap-polyethylene sheet.

C. Water: Potable.

D. Clear, Waterborne, Membrane-Forming Curing Compound: ASTM C 309, Type 1, Class B.

1. Clear, Solvent-Borne, Membrane-Forming Curing Compound:

a. Spray-Cure & Seal 15; ChemMasters.

b. Diamond Clear; Euclid Chemical Co.

2.8 RELATED MATERIALS

A. Joint-Filler Strips: ASTM D 1751, asphalt-saturated cellulosic fiber, or ASTM D 1752, cork or self-expanding cork.

2.9 CONCRETE MIXES

A. Prepare design mixes for each type and strength of concrete determined by either laboratory trial mix or field test data bases, as follows:

1. Proportion normal-weight concrete according to ACI 211.1 and ACI 301.

B. Use a qualified independent testing agency for preparing and reporting proposed mix designs for the laboratory trial mix basis.

C. Slab-on-Grade: Proportion normal-weight concrete mix as follows:

1. Compressive Strength (28 days): 3500 psi.

2. Minimum Cementitious Materials Content (sack/cu. yd.): 6.

3. Maximum Slump: 2-4 inches.

4. Air Entrainment 3% - 6%

D. Admixtures: Use admixtures according to manufacturer's written instructions.

1. Use water-reducing and retarding admixture when required by high temperatures, low humidity, or other adverse placement conditions.

2.10 CONCRETE MIXING

A. Ready-Mixed Concrete: Measure, batch, mix, and deliver concrete according to ASTM C 94, and furnish batch ticket information.

03300 - 5

1. When air temperature is between 85 and 90 deg F, reduce mixing and delivery time from 1 1/2 hours to 75 minutes; when air temperature is above 90 deg F, reduce mixing and delivery time to 60 minutes.

PART 3 – EXECUTION

3.1 FORMWORK

A. Design, erect, shore, brace, and maintain formwork, according to ACI 301, to support vertical, lateral, static, and dynamic loads, and construction loads that might be applied, until concrete structure can support such loads.

B. Construct formwork so concrete members and structures are of size, shape, alignment, elevation, and position indicated, within tolerance limits of ACI 117.

C. Limit concrete surface irregularities, designated by ACI 347R as abrupt or gradual, as follows:

1. Class A, 1/8 inch.

D. Construct forms tight enough to prevent loss of concrete mortar.

E. No “Earth” formed footing will be allowed for the building foundations.

F. Fabricate forms for easy removal without hammering or prying against concrete surfaces. Provide crush or wrecking plates where stripping may damage cast concrete surfaces. Provide top forms for inclined surfaces steeper than 1.5 horizontal to 1 vertical. Kerf wood inserts for forming keyways, reglets, recesses, and the like, for easy removal.

1. Do not use rust-stained steel form-facing material.

G. Set edge forms, bulkheads, and intermediate screed strips for slabs to achieve required elevations and slopes in finished concrete surfaces. Provide and secure units to support screed strips; use strike-off templates or compacting-type screeds.

H. Provide temporary openings for cleanouts and inspection ports where interior area of formwork is inaccessible. Close openings with panels tightly fitted to forms and securely braced to prevent loss of concrete mortar. Locate temporary openings in forms at inconspicuous locations.

I. Chamfer exterior corners and edges of permanently exposed concrete.

J. Clean forms and adjacent surfaces to receive concrete. Remove chips, wood, sawdust, dirt, and other debris just before placing concrete.

K. Retighten forms and bracing before placing concrete, as required, to prevent mortar leaks and maintain proper alignment.

L. Coat contact surfaces of forms with form-release agent, according to manufacturer's written instructions, before placing reinforcement. Exposed foundation formed with “dimensional” lumber shall be finished with a mixture of cement, sand, and water and worked with sack cloth.

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3.2 EMBEDDED ITEMS

A. Place and secure anchorage devices and other embedded items required for adjoining work that is attached to or supported by cast-in-place concrete. Use Setting Drawings, templates, diagrams, instructions, and directions furnished with items to be embedded.

1. Install anchor bolts, accurately located, to elevations required.

3.3 REMOVING AND REUSING FORMS

A. General: Formwork, for sides of beams, walls, columns, and similar parts of the Work, that does not support weight of concrete may be removed after cumulatively curing at not less than 50 deg F for 24 hours after placing concrete provided concrete is hard enough to not be damaged by form-removal operations and provided curing and protection operations are maintained.

B. Clean and repair surfaces of forms to be reused in the Work. Split, frayed, delaminated, or otherwise damaged form-facing material will not be acceptable for exposed surfaces.

Apply new form-release agent.

C. When forms are reused, clean surfaces, remove fins and laitance, and tighten to close joints. Align and secure joints to avoid offsets. Do not use patched forms for exposed concrete surfaces unless approved by Contracting Officer.

3.4 VAPOR RETARDERS

A. Vapor Retarder: Place, protect, and repair vapor-retarder sheets according to ASTM E 1643 and manufacturer's written instructions.

B. Granular Fill: Cover vapor retarder with granular fill, moisten, and compact with mechanical equipment to elevation tolerances of plus 0 inch or minus 3/4 inch.

3.5 STEEL REINFORCEMENT

A. General: Comply with CRSI's "Manual of Standard Practice" for placing reinforcement.

1. Do not cut or puncture vapor retarder. Repair damage and reseal vapor retarder before placing concrete.

B. Clean reinforcement of loose rust and mill scale, earth, ice, and other foreign materials.

C. Accurately position, support, and secure reinforcement against displacement. Locate and support reinforcement with bar supports to maintain minimum concrete cover. Do not tack weld crossing reinforcing bars.

D. Set wire ties with ends directed into concrete, not toward exposed concrete surfaces.

E. Install welded wire fabric in longest practicable lengths on bar supports spaced to minimize sagging. Lap edges and ends of adjoining sheets at least one mesh spacing.

Offset laps of adjoining sheet widths to prevent continuous laps in either direction.

Lace overlaps with wire.

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3.6 JOINTS

A. General: Construct joints true to line with faces perpendicular to surface plane of concrete.

B. Construction Joints: Install so strength and appearance of concrete are not impaired, at locations indicated or as approved by Contracting Officer.

1. Place joints perpendicular to main reinforcement. Continue reinforcement across construction joints, unless otherwise indicated. Do not continue reinforcement through sides of strip placements of floors and slabs.

2. Form from preformed galvanized steel, plastic keyway-section forms, or bulkhead forms with keys, unless otherwise indicated. Embed keys at least 1-1/2 inches into concrete.

3. Use a bonding agent at locations where fresh concrete is placed against hardened or partially hardened concrete surfaces.

C. Contraction Joints in Slabs-on-Grade: Form weakened-plane contraction joints, sectioning concrete into areas as indicated. Construct contraction joints for a depth equal to at least one-fourth of concrete thickness, as follows:

1. Grooved Joints: Form contraction joints after initial floating by grooving and finishing each edge of joint to a radius of 1/4 inch. Repeat grooving of contraction joints after applying surface finishes. Eliminate groover tool marks on concrete surfaces.

2. Sawed Joints: Form contraction joints with power saws equipped with shatterproof abrasive or diamond-rimmed blades. Cut 1/4 inch- wide joints into concrete when cutting action will not tear, abrade, or otherwise damage surface and before concrete develops random contraction cracks.

D. Isolation Joints in Slabs-on-Grade: After removing formwork, install joint-filler strips at slab junctions with vertical surfaces, such as column pedestals, foundation walls, grade beams, and other locations, as indicated.

1. Extend joint-filler strips full width and depth of joint, terminating flush with finished concrete surface, unless otherwise indicated.

2. Install joint-filler strips in lengths as long as practicable. Where more than one length is required, lace or clip sections together.

3.7 CONCRETE PLACEMENT

A. Before placing concrete, verify that installation of formwork, reinforcement, and embedded items is complete and that required inspections have been performed.

B. Do not add water to concrete during delivery, at Project site, or during placement, unless approved by Contracting Officer.

C. Deposit concrete in forms in horizontal layers no deeper than 24 inches and in a manner to avoid inclined construction joints. Place each layer while preceding layer is still plastic, to avoid cold joints.

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1. Consolidate placed concrete with mechanical vibrating equipment. Use equipment and procedures for consolidating concrete recommended by ACI 309R.

2. Do not use vibrators to transport concrete inside forms. Insert and withdraw vibrators vertically at uniformly spaced locations no farther than the visible effectiveness of the vibrator. Place vibrators to rapidly penetrate placed layer and at least 6 inches into preceding layer. Do not insert vibrators into lower layers of concrete that have begun to lose plasticity. At each insertion, limit duration of vibration to time necessary to consolidate concrete and complete embedment of reinforcement and other embedded items without causing mix constituents to segregate.

D. Deposit and consolidate concrete for floors and slabs in a continuous operation, within limits of construction joints, until placement of a panel or section is complete.

1. Consolidate concrete during placement operations so concrete is thoroughly worked around reinforcement and other embedded items and into corners.

2. Maintain reinforcement in position on chairs during concrete placement.

3. Screed slab surfaces with a straightedge and strike off to correct elevations.

4. Slope surfaces uniformly to drains where required.

5. Begin initial floating using bull floats or darbies to form a uniform and open-textured surface plane, free of humps or hollows, before excess moisture or bleedwater appears on the surface. Do not further disturb slab surfaces before starting finishing operations.

E. Cold-Weather Placement: Comply with ACI 306.1 and as follows. Protect concrete work from physical damage or reduced strength that could be caused by frost, freezing actions, or low temperatures.

1. When air temperature has fallen to or is expected to fall below 40 deg F, uniformly heat water and aggregates before mixing to obtain a concrete mixture temperature of not less than 50 deg F and not more than 80 deg F at point of placement.

2. Do not use frozen materials or materials containing ice or snow. Do not place concrete on frozen subgrade or on subgrade containing frozen materials.

3. Do not use calcium chloride, salt, or other materials containing antifreeze agents or chemical accelerators, unless otherwise specified and approved in mix designs.

F. Hot-Weather Placement: Place concrete according to recommendations in ACI 305R and as follows, when hot-weather conditions exist:

1. Cool ingredients before mixing to maintain concrete temperature below 90 deg F at time of placement. Chilled mixing water or chopped ice may be used to control temperature, provided water equivalent of ice is calculated to total amount of mixing water. Using liquid nitrogen to cool concrete is Contractor's option.

2. Cover steel reinforcement with water-soaked burlap so steel temperature will not exceed ambient air temperature immediately before embedding in concrete.

3. Fog-spray forms, steel reinforcement, and subgrade just before placing concrete.

Keep subgrade moisture uniform without standing water, soft spots, or dry areas.

3.8 FINISHING FORMED SURFACES

A. Smooth-Formed Finish: As-cast concrete texture imparted by form-facing material, arranged in an orderly and symmetrical manner with a minimum of seams. Repair and

03300 - 9 patch tie holes and defective areas. Remove fins and other projections exceeding 1/8 inch in height.

1. Apply to concrete surfaces exposed to public view or to be covered with a coating or covering material applied directly to concrete, such as waterproofing, dampproofing, veneer plaster, or painting.

2. Do not apply rubbed finish to smooth-formed finish.

B. Rubbed Finish: Apply the following to smooth-formed finished concrete:

1. Smooth-Rubbed Finish: Not later than one day after form removal, moisten concrete surfaces and rub with carborundum brick or another abrasive until producing a uniform color and texture. Do not apply cement grout other than that created by the rubbing process.

C. Related Unformed Surfaces: At tops of walls, horizontal offsets, and similar unformed surfaces adjacent to formed surfaces, strike off smooth and finish with a texture matching adjacent formed surfaces. Continue final surface treatment of formed surfaces uniformly across adjacent unformed surfaces, unless otherwise indicated.

3.9 FINISHING FLOORS AND SLABS

A. General: Comply with recommendations in ACI 302.1R for screeding, re-straightening, and finishing operations for concrete surfaces. Do not wet concrete surfaces.

B. Scratch Finish: While still plastic, texture concrete surface that has been screeded and bull-floated or darbied. Use stiff brushes, brooms, or rakes.

1. Apply scratch finish to surfaces indicated and to surfaces to receive concrete floor topping or mortar setting beds for ceramic or quarry tile, portland cement terrazzo, and other bonded cementitious floor finishes.

C. Float Finish: Apply float finish on interior flat work. Consolidate surface with power-driven floats or by hand floating if area is small or inaccessible to power driven floats.

Re-straighten, cut down high spots, and fill low spots. Repeat float passes and re-straightening until surface is left with a uniform, smooth, granular texture.

1. Apply float finish to surfaces indicated, to surfaces to receive trowel finish, and to floor and slab surfaces to be covered with fluid-applied or sheet waterproofing, built-up or membrane roofing, or sand-bed terrazzo.

D. Trowel Finish: After applying float finish, apply first trowel finish and consolidate concrete by hand or power-driven trowel. Continue troweling passes and re-straighten until surface is free of trowel marks and uniform in texture and appearance. Grind smooth any surface defects that would telegraph through applied coatings or floor coverings.

1. Apply a trowel finish to surfaces indicated and to floor and slab surfaces exposed to view or to be covered with resilient flooring, carpet, ceramic or quarry tile set over a cleavage membrane, paint, or another thin film-finish coating system

2. Finish surfaces to the following tolerances, measured within 24 hours according to ASTM E 1155/E 1155M for a randomly trafficked floor surface:

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3. Finish and measure surface so gap at any point between concrete surface and an unleveled freestanding 10-foot-long straightedge, resting on two high spots and placed anywhere on the surface, does not exceed 1/8 inch.

E. Trowel and Fine-Broom Finish: Apply a partial trowel finish, stopping after second troweling, to surfaces indicated and to surfaces where ceramic or quarry tile is to be installed by either thickset or thin-set method. Immediately after second troweling, and when concrete is still plastic, slightly scarify surface with a fine broom.

F. Broom Finish: Apply a broom finish to exterior concrete sidewalks, aprons, and elsewhere as indicated.

1. Immediately after float finishing, slightly roughen trafficked surface by brooming with fiber-bristle broom perpendicular to main traffic route. Coordinate required final finish with Contracting Officer before application.

3.10 MISCELLANEOUS CONCRETE ITEMS

A. Filling In: Fill in holes and openings left in concrete structures, unless otherwise indicated, after work of other trades is in place. Mix, place, and cure concrete, as specified, to blend with in-place construction. Provide other miscellaneous concrete filling indicated or required to complete Work.

3.11 CONCRETE PROTECTION AND CURING

A. General: Protect freshly placed concrete from premature drying and excessive cold or hot temperatures. Comply with ACI 306.1 for cold-weather protection and with recommendations in ACI 305R for hot-weather protection during curing.

B. Evaporation Retarder: Apply evaporation retarder to unformed concrete surfaces if hot, dry, or windy conditions cause moisture loss approaching 0.2 lb/sq. ft. x h before and during finishing operations. Apply according to manufacturer's written instructions after placing, screeding, and bull floating or darbying concrete, but before float finishing.

C. Formed Surfaces: Cure formed concrete surfaces, including underside of beams, supported slabs, and other similar surfaces. If forms remain during curing period, moist cure after loosening forms. If removing forms before end of curing period, continue curing by one or a combination of the following methods:

D. Unformed Surfaces: Begin curing immediately after finishing concrete. Cure unformed surfaces, including floors and slabs, concrete floor toppings, and other surfaces, by one or a combination of the following methods:

1. Moisture Curing: Keep surfaces continuously moist for not less than seven days with the following materials:

a. Water.

b. Continuous water-fog spray.

c. Absorptive cover, water saturated, and kept continuously wet. Cover concrete surfaces and edges with 12-inch lap over adjacent absorptive covers.

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2. Moisture-Retaining-Cover Curing: Cover concrete surfaces with moisture-retaining cover for curing concrete, placed in widest practicable width, with sides and ends lapped at least 12 inches, and sealed by waterproof tape or adhesive. Cure for not less than seven days. Immediately repair any holes or tears during curing period using cover material and waterproof tape.

a. Cure concrete surfaces to receive floor coverings with either a moisture-retaining cover or a curing compound that the manufacturer recommends for use with floor coverings.

b. Curing Compound: Apply uniformly in continuous operation by power spray or roller according to manufacturer's written instructions. Recoat areas subjected to heavy rainfall within three hours after initial application. Maintain continuity of coating and repair damage during curing period.

3. Curing and Sealing Compound: Apply uniformly to floors and slabs indicated in a continuous operation by power spray or roller according to manufacturer's written instructions. Recoat areas subjected to heavy rainfall within three hours after initial application. Repeat process 24 hours later and apply a second coat. Maintain continuity of coating and repair damage during curing period.

3.12 JOINT FILLING

A. Prepare, clean, and install joint filler according to manufacturer's written instructions.

B. Remove dirt, debris, saw cuttings, curing compounds, and…