Attachment 1 - Specifications.pdf

NATIONAL FORESTS IN NORTH CAROLINA

NANTAHALA NATIONAL FOREST

TUSQUITEE RANGER DISTRICT

FIRES CREEK RECREATION AREA

PICNIC AREA & TRAILHEAD

PARKING LOT & ACCESS TRAIL RECONSTRUCTION

ARRA PROJECT # CIM-0811-04T

MAY 2010

NFs in NC Engineering, Heritage, and Recreation

Facilities Group

SPECIFICATION INDEX

DIVISION 1 - GENERAL REQUIREMENTS

01010 - Summary of Work 01050 - Field Engineering 01300 – Submittals

DIVISION 2 - SITE WORK

02200 – Precast Concrete Vault Toilet Relocation 02210 - Site Grading 02220 - Structural Excavation 02250 - Compaction Control and Testing 02540 – Erosion and Sedimentation Control 02720 – Aggregate Base 02740 – Plant mix Bituminous Pavement 02821 – Seeding

DIVISION 3 - CONCRETE

03100 - Concrete Formwork 03200 - Concrete Reinforcement 03300 - Cast-in-Place Concrete 03310 - Concrete from Packaged Dry Mix for Minor Structures

DIVISION 7 – THERMAL & MOISTURE

07110 – Membrane Waterproofing

SECTION 01010

SUMMARY OF WORK

PART 1 - GENERAL

A. The Contractor is to provide the complete construction of the concrete sidewalks, asphalt paved parking lot and the relocation of the existing vault toilet as specified herein and as shown on the drawings.

B. Permits

None required.

C. Coordination

1. Construction activities shall be coordinated with the District’c Recreation Technician, Todd Sharkey, through the project COR.

D. Storage of Materials

1. The Contractor may store materials and equipment at the work site at his own risk. All materials must be kept in an area designated by the C.O. and be neat and orderly.

2. The Contractor shall install barricades or tape barriers around all open excavations and storage areas.

E. Construction Schedule

1. A proposed schedule of work for the project construction shall be submitted to the C.O. for approval

10 days prior to starting construction.

2. The area will be closed to the public during the life of the contract.

F. Existing Facilities

1. The Contractor must furnish and maintain a portable toilet.

2. The Contractor must furnish electrical generators as needed.

3. There is no potable water at the site. The Contractor must furnish his own potable water for construction.

G. Project Closeout

1. Not applicable.

SECTION 01050

FIELD ENGINEERING

A. The locations of all proposed new work relative to existing features are indicated on the construction drawings.

B. The Contractor shall be responsible for field layout and construction staking of all items of work.

SECTION 01300

SUBMITTALS

A. The Contractor shall be required to furnish the following to the C.O. prior to commencing any work that relates to a respective submittal (three copies of all submittals required).

1. Concrete mix design.

2. Any other equipment that is a substitute for specified equipment.

B. The Contractor shall obtain approval in writing before installation of equipment.

SECTION 02200

PRECAST CONCRETE VAULT TOILET RELOCATION

PART 1 – GENERAL

A. This section covers the removal and relocation of the existing Rocky Mountain Single Unit Vault Toilet.

The Toilet building manufacturer is CXT Precast Products, Tel. No. 509-921-8766. Local Representative is Jeff Chambers, Atlanta, GA, Office Tel No. 254-580-9100, Cell No. 678-206-6426.

PART 2 – PRODUCTS

A. Existing vault toilet is a Single Unit Rocky Mountain.

B. The building is a three section precast unit. Section weights are as follows:

1. Building Top – 15,700 lbs

2. Building Bottom – 13,500 lbs

3. Vault – 17,000 lbs

PART 3 – EXECUTION

A. The vault shall be pumped-out by a licensed septic tank pumping contractor prior to moving the building.

The vault capacity is 1,000 gallons.

B. The contractor shall furnish a crane with sufficient lifting capability to remove the building sections in a safe manner.

C. The building section joints are sealed with an elastomeric sealant. The contractor shall heat the joints prior to lifting to ease separation of the sections.

D. Re-install building at the location and elevation shown on the drawings.

E. Partially fill the vault with 250 gallons of water after relocation.

F. Repair any damage to the building caused by the re-location.

SECTION 02210

SITE GRADING

A. This section covers all required site grading, asphalt surfacing removal and the final dressing of the site within the construction area.

PART 2 - PRODUCTS

A. Bedding material under concrete sidewalks and asphalt pavement shall be NC DOT approved ABC stone.

PART 3 - EXECUTION

A. Excavation shall produce surfaces to line and grade shown on drawings. All excavated areas shall drain.

B. Exterior fills shall be constructed to sections and elevations indicated. Exterior fills shall drain.

C. Compact bedding material under all surfaces.

1. Compaction shall be in accordance with Section 02250, Compaction Control and Testing.

D. When all exterior earthwork is completed, the Contractor shall give the entire site a final dressing to assure that all surfaces are in accordance with the elevations indicated on the drawings.

SECTION 02250

COMPACTION CONTROL AND TESTING

A. This section covers all compaction for earth fills under footings, slabs, walkways and other backfill as shown on the drawings and specified herein.

PART 2 - PRODUCTS

A. Material used for fills and backfills shall be as described in Section 02210, Site Grading.

PART 3 - EXECUTION

A. The ground on which the fill or backfill material is to be placed shall be firm, dry, unfrozen, and cleared of all debris.

B. Compacted fills under concrete slabs, footings and walkways shall be compacted to a uniform density until no visible settlement occurs.

C. Backfill around structures and supports shall be done in 8" lifts and compacted to a uniform density until no visible settlement occurs.

D. Compaction shall be accomplished by the use of a mechanical compaction equipment and shall continue until no visual displacement occurs.

E. Compaction testing shall not be required.

SECTION 02740

PLANT MIX BITUMINOUS PAVEMENT

PART 1 GENERAL

A. WORK INCLUDED

1. This work consists of the production, delivery, placement, and compaction of asphalt plant mixed surface as shown on the drawings and specified herein.

B. REFERENCES

AASHTO M 156-89 Requirements for Mixing Plants for Hot- Mixed, Hot-Laid Bituminous Paving Mixtures

NCDOTSS North Carolina Department of Transportation Standard Specifications for Roads & Structures

C. SUBMITTALS

1. The asphalt mix formula proposed for use by the subcontractor shall be a mix formula that has been previously certified by NC DOT as meeting the requirements of this specification. The subcontractor shall submit a letter of certification from the proposed asphalt mix supplier that verifies the intended formula meets said requirements.

2. The Contractor shall furnish with each shipment 2 copies of a delivery ticket. Both copies shall accompany the shipment and be delivered to the COR at the destination. The delivery ticket shall contain the following information: Delivery ticket number, date shipped, project or purchase order number, State Laboratory assigned batch number, destination, name of consignee, trailer or car number, supplier's storage tank or batch number, quantity loaded (pounds or gallons), specific gravity or pounds per gallon at 60°F., loading temperature, and net gallons at 60°F.

3. Certified reports of Inspections and laboratory tests as required by this specification shall be prepared by an independent testing laboratory.

4. In either case no asphalt materials shall be delivered to the job site prior to said certifications being received and/or accepted by the COR.

D. QUALITY PROGRAM REQUIREMENTS

1. The asphalt mixing

Asphalt Mixture Production.

plant shall meet the requirements of NCDOTSS , Section 610-5, PART 2 PRODUCTS

A. ASPHALTIC CONCRETE - SURFACE COURSE

1. NCDOT Type S9.5B shall be used as a surface course and placed over the prepared aggregate base course as shown on the drawings.

PART 3 EXECUTION

A. GENERAL

1. The asphalt plant mix shall be produced, transported to the site, placed, and compacted in accordance with the applicable sections of NCDOTSS 610, Asphalt Plant Mix Pavements.

B. Conditioning of Existing Surface

1. Immediately before placing the bituminous mixture, the existing surface shall be cleaned of loose or deleterious material.

2. Contact surfaces of curbing, gutters, manholes, and other structures shall be painted with a thin, uniform coating of bituminous material prior to placing bituminous mixture against them.

3. The surfaces of adjacent structures shall be protected from spattering or marring during placement.

C. AGGREGATE SUBGRADE PREPARATION

1. All areas to receive new asphalt paving shall be graded to ensure continuous drainage.

1. Aggregate subgrade shall be approved in writing by the COR before asphalt paving begins.

D. ASPHALT PAVEMENT

1. Surface smoothness tolerances shall conform to NCDOTSS, Section 610-13 Surface Requirements.

2. Do not apply asphalt mixtures to a wet or frozen surface or when the air temperature is below 45 degrees F or when weather conditions are otherwise unfavorable. Any exceptions to these restrictions shall require written permission from the COR.

E. JOINTS

1. When the laying of the mixture is to be suspended long enough to permit the mixture to become chilled, a transverse joint shall be constructed.

2. A butt joint will be permitted, provided proper compaction is achieved. The joint shall be constructed square to the lane alignment and all excess material shall be discarded.

3. Before paving operations are resumed, the exposed edge of the previously constructed pavement shall be lightly coated with tack coat.

F. COMPACTION

1. Asphalt shall be uniformly compacted by rolling before the asphalt has cooled below 185 degrees F. Compaction equipment shall meet the requirements of NCDOTSS Section 610-10.

2. Asphalt shall be compacted to a density of at least 90% of the maximum specific gravity (density) as determined according to AASHTO T209 as part of the job-mix formula.

G. TESTING & INSPECTION

1. Not required.

SECTION 02540

EROSION AND SEDIMENTATION CONTROL

A. This work consists of temporary and permanent measures as shown on the drawings and as specified herein, to prevent and control soil erosion and sedimentation.

A. Silt fences shall be pre-fabricated with 1-½” square, hardwood posts, Mirafi Silt Fence, or approved equal.

B. Filter stone shall be ½ to ¾ inch aggregate NCDOT #57 or #5 washed stone.

C. Standard size hay or staw bales with 2” x 2” x 36” long stakes.

A. Prior to start of construction, the Contractor shall submit to the C.O. for approval , a schedule for temporary and permanent sedimantation control work for each phase of the work.

C. The Contractor shall monitor the performance of all erosion and sediment control practices and make minor adjustment as needed on a day-to-day basis.

D. Temporary controls shall be dismantled and disposed of after the disturbed soil has benn re-vegetated.

SECTION 02821

SEEDING, FERTILIZING, AND MULCHING

PART 1 GENERAL

A. A. This section covers the seeding of all disturbed areas within the construction limits. The work shall include fine grading of the areas, soil preparation, and application of lime, fertilizer, seed, and mulch.

PART 2 PRODUCTS

A. Fertilizers shall be spread on the ground surface at the following rates.

Grade 18/46/0 600 lb/acre

B. Seed shall be spread on the ground surface in the following amounts.

Winter 90 lbs/acre

C. All dates shown are guidelines. If weather conditions are abnormal, the CO shall consult with Forest Service Soil Scientist and/or Botanist for additional seeding times.

Permanent Seeding – Spring (2/1 to 5/1):

Fungus Free Tall Fescue (Kentucky 31 is not acceptable): 20 lbs/acre Virginia Wild Rye: 10 lbs/acre Creeping Red Fescue: 6 lbs/acre Red Clover: 12 lbs/acre Rye (cereal small grain): 30 lbs/acre

Permanent Seeding – Summer (5/1 to 8/1):

Creeping Red Fescue: 10 lbs/acre Little Bluestem: 10 lbs/acre Indian Grass: 10 lbs/acre Partridge Pea: 6 lbs/acre

Temporary Seeding:

Foxtail (German) Millet: 30 lbs/acre Partridge Pea: 5 lbs/acre

D. Assure that mulch used on the project is certified noxious weed free by the appropriate authority in the jurisdiction of use.

E. Moisten seeding areas before seeding and maintain the moisture until 3 days after germination.

F. Apply fertilizer by the following methods:

1. Dry method. Incorporate the fertilizer into the upper portion of the seedbed before seeding.

2. Apply seed and fertilizer at rates specified.

3. Apply seed by the following methods:

a. Dry method. Apply the seed with approved power driven seeders, drills, or other mechanical equipment. Hand-operated seeding methods are satisfactory on areas inaccessible to mechanical equipment.

4. Apply mulch within 48 hours after seeding by the following methods:

a. Dry method. Spread all mulch material, except wood and grass cellulose fibers, by a mulch spreader utilizing forced air to blow the mulch material onto the seeded area.

Apply straw mulch at designated rate. Anchor the mulch material with an approved stabilizing emulsion tackifier or approved mechanical method. Do not mark or deface structures, pavements, utilities, or plant growth with tackifier. Apply wood fiber or grass straw cellulose fiber mulch at the designated rate. Apply bonded fiber matrix hydraulic mulch at the designated minimum rate. Apply so no hole in the matrix is greater than 0.04 inches. Apply so that no gaps exist between the matrix and the soil.

b. Mulch by hand areas inaccessible to mulching equipment.

5. Protect and care for seeded areas including watering when needed until final acceptance.

Repair all damage to seeded areas by reseeding, refertilizing, and remulching. Apply supplemental applications of seed, mulch, fertilizer, lime, or ammonium nitrate.

A. Seeding operations shall be carried out in a timely manner following any and all backfill completion as directed by the COR.

B. All disturbed areas to be seeded shall be graded, leveled, and prepared to receive the grass seed.

C. Application of Lime and Fertilizer - following the grading and leveling operation, lime and fertilizer shall be spread uniformly over the area to be seeded.

D. Seed shall be uniformly sown over the area at the rate specified by hand sowing. The Contractor may use a hydro-seeding method if approved by the COR.

E. Pine straw or pine needles shall be uniformly spread over the area at the rate specified.

SECTION 03100

CONCRETE FORMWORK

A. This section covers all formwork, expansion joints, and related accessories.

PART 2 - PRODUCTS

A. Forms shall be wood, plywood, hardboard, or metal and shall be approved by the C.O.

B. Form oil shall be nonstaining type.

C. Expansion joint filler shall be pressure treated Southern Yellow Pine boards. Treatment shall be 0.4 lbs/cf of approved treatment.

PART 3 - EXECUTION

A. Forms shall be built tight, in proper alignment and adequate to resist the stresses of concrete placement without deformation.

B. Forms shall be constructed to produce the required concrete surface.

C. Expansion and contraction joints shall be formed as indicated on the drawings.

D. Control joints shall be saw cut or tooled at the locations shown on the drawings. Joints shall be 1/5 the depth of the slab.

SECTION 03200

CONCRETE REINFORCEMENT

A. This section covers all concrete reinforcement and its accessories.

B. The latest editions of the following specifications and codes shall govern.

1. ACI 301, Specifications for Structural Concrete for Buildings.

2. ASTM A615

3. ASTM A185

PART 2 - PRODUCTS

A. Reinforcing steel shall comply with ASTM A615, intermediate grade 40, unless otherwise shown.

B. Reinforcing mesh shall comply with STM A185 and shall be gauge and mesh indicated.

PART 3 - EXECUTION

A. Reinforcement bars and mesh shall conform to the sizes and spacings as shown.

B. Field bending and cutting will be permitted if performed in accordance with above listed code.

C. Reinforcement shall be free from dirt, oil, paint, grease, mill scale, and loose or thick rust when concrete is placed.

D. Woven wire mesh shall be hooked and/or supported during the placement of concrete slabs to ensure proper embedment as detailed.

E. Anchorage and accessories shall be accurately placed as shown and held rigidly in position during placing of concrete.

F. Depth of cover, radius of bends, and deformations shall be in accordance with ACI 318.

SECTION 03300

CAST-IN-PLACE CONCRETE

A. This section covers cast-in-place concrete, including curing and finishing of concrete.

B. The latest editions of the following specifications and recommended practices shall govern:

1. ACI 301 - Specifications for Structural Concrete for Buildings.

2. ACI 306 - Recommended Practice for Winter Concrete

3. ACI 305 - Recommended Practice for Hot Weather Concrete

C. Notify C.O. 48 hours prior to placing concrete.

A. Concrete Mix Design

1. The concrete shall have a minimum "compressive strength" of 3000 psi at 28 days.

2. Concrete shall be air-entrained and shall contain not less than 3% and not more than 6% entrained air determined by test procedure AASHTO T 152.

3. “Commercial” Fibermesh Reinforcement shall be required.

5. The design of the concrete mixture shall be the responsibility of the Contractor.

B. Slump shall not exceed 3 inches for vibrated concrete or 5 inches for non-vibrated concrete.

PART 3 - EXECUTION

A. "Ready-Mixed Concrete" may be employed if the time interval between mixing at the plant and discharge into the form does not exceed 1-1/2 hours.

B. All concrete shall be placed within 1-1/2 hours from the time of mixing.

1. No concrete shall be placed after it has started its initial set.

2. No concrete with a temperature above 90ºF shall be placed.

C. Concrete shall be placed in such a manner as to avoid segregation of the mixture.

1. Concrete shall be spread in horizontal layers when practicable.

2. No concrete shall be freely dropped more than 5 feet.

3. Depositing a large quantity of concrete and flowing or working it along the forms will not be permitted.

D. Mechanical vibrators shall be used for consolidation of concrete.

1. Concrete shall be consolidated within 15 minutes after placement.

2. If consolidation of concrete with mechanical vibrators is impractical, hand tamping, rodding, and spading will be permitted.

3. A minimum of two vibrators, in working order, shall be on the job during concrete placement.

E. Concrete shall be placed and protected as specified for temperature conditions.

F. Concrete plant standards and truck mixer and agitator standards shall be as recommended by the National Ready Mix Association.

G. Finishing

1. All finishes shall be made without use of cement or other dusting materials.

2. Concrete shall be struck to proper grade and surface finished with float trowels.

3. At all exposed form surfaces, remove all ties, fill all form tie holes and imperfections (i.e., "honeycombing") with dry cement mortar, remove all lines, and then "sack" or finish to match adjacent surfaces.

4. Exterior sidewalks shall be medium broom finished.

H. Concrete shall be protected against rapid drying and kept moist for seven days by covering with curing paper with edges sealed.

I. Sampling and Testing

1. Sampling and testing shall be the responsibility of the Contractor, through an approved testing laboratory. The Contractor shall test for strength, air content and slump.

2. Sampling and testing shall be done in accordance with the following test methods:

--Sampling Fresh Concrete................................... AASHTO T-141 --Making and Curing Concrete Compression Test Specimens........................... AASHTO T-23 --Compressive Strength of Concrete Cylinders…. AASHTO T-22 --Percent Entrained Air (Pressure Method)........... AASHTO T-152 --Consistency (Slump) of Concrete....................... AASHTO T-119

3. Testing frequency shall be one sample or test per every 10 c.y. or truck load.

4. Submit copy of test results to Contracting Officer.

SECTION 03310

CONCRETE FROM PACKAGED DRY MIX FOR MINOR STRUCTURES

A. Consists of constructing small concrete structures requiring one-half cubic yard or less in accordance with the details shown on the drawings and in conformance with the requirements of this specification.

PART 2 - PRODUCTS

A. Forms: Plywood, hardboard, wood, metal or other approved material to yield the required finish.

B. Dry Mix: The prebagged concrete mix shall be made using a dry preportioned blended mix meeting the requirements of ASTM C-387 for 28 days, 3,500 psi concrete.

C. Water: Water shall be clean and free from alkali and other deleterious materials. Water shall be added to each bag as recommended by the manufacturer.

PART 3 - EXECUTION

A. Job Mixing: The dry concrete mix and water shall be thoroughly mixed as recommended by the manufacturer. Mixing must be done in either a mechanical mixer or in a wheelbarrow. Concrete shall be mixed and placed while fresh. Any concrete in which initial set has begun shall be wasted. In any case, the elapsed time from placement of the first batch to placement of the last batch necessary to complete a specific concrete item shall not exceed one hour.

B. Placing and Finishing: The fresh concrete shall be placed in the forms and rodded as necessary to remove the air pockets. The exposed surfaces of the concrete shall receive a medium trowel finish.

C. Protection from Cold: The Contractor shall ensure that the air surrounding the fresh concrete be kept at a temperature above 50 degrees F for a period of five days after the concrete is placed.

D. Curing: If determined necessary by the C.O., exposed surfaces shall be covered with plastic sheeting after the concrete has taken its initial set.

SECTION 07110

MEMBRANE WATERPROOFING

PART 1 - GENERAL

A. This section covers all membrane waterproofing and related items.

PART 2 - PRODUCTS

A. Vapor barrier shall be 6 mil, clear grade polyethylene.

A. Install vapor barrier under all concrete walkways. Lap and secure edges of vapor barrier to assure tight seal.