TECHNICAL SPECIFICATIONS

Concrete Slab On Grade at the

Berkshire NFH

Massachusetts

TABLE OF CONTENTS

SECTION TITLE

DIVISION 1 - GENERAL REQUIREMENTS

01010 Summary of Work

01300 Submittals

DIVISION 2 - SITE WORK

02200 Excavation, Backfilling, and

Site Grading

03300 Concrete

APPENDIX:

Some drawings of the concrete slab and caissons, and alternate quote item 1 (concrete slab and stem wall option).

SECTION 01010

SUMMARY OF WORK

1.01 DESCRIPTION OF WORK

1. The work to be accomplished under this contract consists of the construction of a concrete slab on grade and foundation for a future storage building, to be constructed by the Government at later date.

The base quote item is to construct the concrete slab on grade with circular caissons.

The alternate quote item (if selected) is to construct the concrete slab on grade with stem wall and footings.

The proposed location for the concrete slab will be staked in the field by the on site Government representative. Some concrete slab details are included as an attachment to this statement of work.

2. Contractor shall furnish all labor, materials, equipment and incidentals necessary to complete the work in accordance with these specifications and as shown on sketches in the Appendix.

1.02 LOCATION AND INSPECTION OF SITE

A. Prospective bidders are encouraged to visit the site of the work area.

1.03 FACILITY OPERATIONS

Berkshire NFH will continue operations during the performance of the contract.

The Contractor shall confine his operations to weekdays, Monday thru Friday (holidays excluded), between the hours of 7:30 a.m.

to 4:00 p.m., unless he has prior approval of the Facility

Manager.

The Contractor shall exercise care and shall perform his work diligently. If it becomes necessary to interrupt any function of the facility, the Contractor shall notify the Manager and shall not proceed with such interruptions until such time as the

Hatchery Manager makes provision for, and approves such operations.

The contractor shall notify the Manager 24 hours prior to the delivery of any materials, and 48 hours prior to the beginning of each item of work that is scheduled to take place.

1.04 ACCESS

A. In the performance of work for this contract, any existing sections of facility roads which are not awarded as part of this paving contract shall be returned to their original condition prior to contractor operations.

The contractor shall exercise care to minimize deterioration of the existing roadways.

1.05 SAFETY

The Contractor shall be responsible for compliance with all

Federal, State and Local Safety and Environmental regulations to include provisions of Occupational Safety and Health

Administration (OSHA) requirements.

1. CODE OF FEDERAL REGULATIONS (CFR)

a. 29 CFR 1910 Occupational Safety and Health

Standards OSHA)

b. 29 CFR 1926 Safety and Health Regulations for Construction

1.06 CLEANUP

A. The Contractor shall clean up and dispose of daily, all rubbish and waste accumulation.

B. The Contractor shall, at completion of the project, remove tools and equipment, and leave the premises clean.

END OF SECTION

SECTION 01300

SUBMITTALS

1.01 GENERAL

Prior to the start of work, the Contractor shall submit the following required information.

1.02 CERTIFICATION

Certificates required:

Certificate of Insurance

Gravel materials

Concrete mix design

1.03 MATERIALS

Submit manufacturer’s information for the rebar or fiber mesh to be used.

SECTION 02200

EXCAVATION, BACKFILLING & SITE GRADING

PART 1 - GENERAL

1.01 DESCRIPTION OF WORK

A. The work of this section consists of the excavation and backfilling required for the concrete slab installation.

1.02 SAFETY

A. Protect all known existing utilities against damage.

B. Barricades, warning lights, and similar safety precautions shall be provided as required.

1.03 WASTE

A. Excavated material not suitable for fill requirements and excess material shall be removed from the site by the

Contractor.

PART 2 - PRODUCTS

2.01 MATERIALS

A. IMPORTED GRAVEL: Clean local or commercial material consisting of natural or artificial mixtures of natural or manufactured gravels, stone, slag, or sand; free of soil, muck, roots, vegetative and organic matter and debris.

Gravel materials must also meet the following gradation:

Gradation Requirements for gravel materials:

Sieve Size % passing

0.25 inch 25-70

No. 40 0-30

No. 200 0-7

PART 3 - EXECUTION

3.01 STRIPPING

The existing surface shall be stripped from the areas where the concrete slab on grade is to be constructed, and shall be stockpiled at a location approved by the Government, to be retained by the Government for their future use.

3.02 EXCAVATION

A. Excavation for concrete slab shall be carried below grade as required for construction. If excavations are carried below the required depth without written authorization, they shall be backfilled with fill concrete at the Contractor's expense.

If there are areas of subgrade which are unsuitable due to highly organic matter, trash or debris, this unsound material shall be removed to an additional depth not to exceed one feet, and backfilled with imported gravel material free from organic material, trash or debris.

B. Stripping of existing gravel ground cover and subgrade excavation, with allowance for 12 inches of gravel layer, shall be performed in areas where the gravel layer is to be placed. If unsuitable subgrade material is found in some areas, then excavate to an additional depth not to exceed one feet to suitable material and backfill with gravel fill material.

3.03 BACKFILL

A. Gravel base shall be placed in 6 inch layers and compacted to

95% of maximum density at optimum moisture content by hand or mechanical tampers.

B. Fill around concrete area shall be placed in layers not to exceed 12 inches, and compacted by hand or mechanical tampers to

90% of maximum density at optimum moisture content.

3.04 SITE GRADING

A. Respread stockpiled topsoil. Grading shall produce a finished surface that is free from depressions and which will provide drainage and prevent pocketing of water.

CONCRETE

PART 1 - GENERAL

1.01 SECTION INCLUDES

A. Cast in place concrete required for slab on grade an caissons.

1.02 REFERENCES

A. ASTM C33 - Concrete Aggregate.

B. ASTM C94 - Ready-Mixed Concrete.

C. ASTM C150 - Portland Cement.

D. ASTM C260 - Air Entraining Admixtures for Concrete.

1.03 QUALITY ASSURANCE

A. Perform cast-in-place concrete work in accordance with ACI

301 and as specified herein.

1.04 SUBMITTALS

A. Furnish certification that concrete mix meets specified requirements. Provide items of information as specified under

ASTM C94, batch ticket information.

1.05 JOB CONDITIONS

A. Weather Conditions: ACI 305 and 306, Hot and Cold Weather

Concreting.

B. Place no concrete on mud, disturbed soil, or frozen surfaces.

C. Maintain site in dry condition during placing and curing operations.

PART 2 - PRODUCTS

2.01 FORMS

A. Conform to ACI 301.

B. Lumber, steel, or other approved material.

C. Premolded joint filler shall be bituminous fiber type, complying with ASTM D-1752.

2.02 CONCRETE MATERIALS

A. Cement: ASTM C150, Type II cement with air-entraining admixture.

B. Aggregates

1. Fine: ASTM C33; natural sand.

2. Course: ASTM C33; crushed stone or gravel, maximum size of course aggregate shall be one inch.

C. Water: Clean and free from deleterious amount of acids, alkalis and organic materials.

2.03 ADMIXTURES

A. Air Entrainment Admixture: ASTM C260.

2.04 CONCRETE MIX

A. ACI 301; Compressive Strength, 28 days, 4000 psi; slump, minimum of two inch, maximum four inches; air entrainment 5-1/2 percent, plus or minute 1-1/2 percent, water-cement ratio shall not exceed 0.45, inclusive of water in the aggregate.

B. Mix concrete and admixtures in accordance with ASTM C94.

C. Addition of water to the mix at the project site must be approved by the Engineer and maximum water/cement ratio shall not be exceeded. The delivery ticket shall be noted with amount of additional water added and submitted to the Engineer.

D. Concrete shall be discharged at the job within one hour after water has been added to the cement and aggregates or cement batched with aggregates.

2.05 REINFORCING STEEL OR FIBER MESH ITEMS

A. Reinforcing steel shall be steel rebar conforming to ASTM A

615, grade 40.

B. If fiber mesh is used, the following requirements shall be adhered to.

Fiber type shall be synthetic fibers like polypropylene. They can be microfibers (e.g., Sika® Fibermesh®-150, Fibermesh 150e3) or macrofibers (e.g., Sika® Fibermesh®-650) or approved equal.

The amount of fiber to be used (dosage rate) is as follows: The amount of fiber added per cubic yard of concrete shall be 3 to

7.5 pounds per cubic yard. The fiber mesh shall be mixed evenly into wet concrete before it's poured.

The fiber mesh shall meet ASTM C1116, Type III, or other relevant standards for fiber-reinforced concrete.

PART 3 - EXECUTION

3.01 FORMWORK ERECTION

A. Install formwork to confine the concrete to be placed.

B. Hand trim sides and bottom of earth forms; remove loose soil.

C. Brace, and support formwork to prevent lateral movement.

D. Provide chairs, and/or supports as required to insure that welded wire fabric will be located at mid depth within the slab.

3.02 PLACING CONCRETE

A. Comply with ACI 301.

B. Concrete shall be well vibrated, rodded or spaded into place to fill all voids and angles to insure dense concrete without voids.

C. Water shall be removed from within forms and excavations before and during placement of concrete.

3.03 REMOVAL OF FORMS AND CURING

A. Formwork may be removed after cumulatively curing at not less than 50 degrees F for 72 hours after placing concrete provided concrete is sufficiently hard and not damaged by form removal operations and provided that curing and protection operations are maintained.

B. Concrete surface shall be protected from loss of moisture by one of the following materials:

1. Burlap cloth made from jute or kenaf, kept moist.

2. Moisture retaining cover, such as polyethlene film.

3. Application of a curing compound, ASTM C309, Type 1, clear liquid, membrane forming. Rate of application is 2 coats, 200 square feet per gallon per coat.

3.04 PROTECTION

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

3.05 FINISH

Top surface of concrete shall be broom finished. Sawcut crack control joints at 10’ on center maximum each way, within 8 hours after initial concrete placement.

ATTACHMMENT

Drawings of the concrete slab on grade and caissons.

Drawing of the concrete slab on grade with stem wall and footings for the alternate quote item.