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NATIONAL FORESTS IN NORTH CAROLINA

NANTAHALA NATIONAL FOREST

NANTAHALA RANGER DISTRICT

FEREBEE TAKE-OUT UPGRADE

September 2009 National Forests in North Carolina

Engineering, Heritage & Recreation

Facilities

SPECIFICATION INDEX

DIVISION 1 - GENERAL REQUIREMENTS

01110

Summary of Work

01330

Submittals

01420

Reference Standards

01450

Quality Control

01720

Construction Staking

DIVISION 2 - SITE WORK

02220

Selective Demolition

02230

Clearing & Grubbing

02315

Structural Excavation for Minor Structures 02370

Erosion & Sediment Control

02710

Subsurface Drainage

02920

Permanent & Temporary Seeding

DIVISION 3 - CONCRETE

03100

Concrete Formwork

03200

Concrete Reinforcement

03300

Cast in Place Concrete

DIVISION 4 - MASONRY

04410

Stone Masonry Veneer

DIVISION 5 - METALS

05520

Guardrails and Handrails

SECTION 01110

SUMMARY OF WORK

PART 1 GENERAL

1.01 PROJECT LOCATION

A. Location of work is approximately 20 miles southwest of Bryson City, North Carolina off US Hwy 19 in Swain County, North Carolina.

1.02 DESCRIPTION

A. This work shall consist of the complete upgrade of the Ferebee Public Take-out. The work shall include the following: minor clearing & grubbing, selective demolition, site grading, construction of stone veneer concrete retaining walls, construction of concrete pavement, seeding & mulching and erosion control.

B. The Contractor shall furnish all labor, materials, equipment, tools, supplies, supervision and transportation and perform all of the work required AS SHOWN ON THE DRAWINGS AND SPECIFICATIONS.

1.03 STORAGE OF MATERIALS

A. 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 COR and be neat and orderly.

B. The Contractor shall install barricades or tape barriers around all open excavations.

1.04 EXISTING FACILITIES

A. There are sanitary facilities available at the project site.

B. There is secondary electrical service near the project site.

C. There is potable water available at the project site.

D. Existing facilities are seasonal and may not be open during the Contract period.

1.05 SAFETY

A. No trenches shall be left open overnight.

B. Construction fencing shall be used to limit access to the construction areas by the general public.

1.06 CONSTRUCTION SCHEDULING & CONSTRAINTS

A. A proposed schedule of work for the project construction shall be submitted to the COR for approval 10 days prior to starting construction.

B. Construction shall not commence until Notice to proceed is issued and shall be completed within 180 thereafter.

C. The Nantahala River is not normally used to generate power during the month of November.

SECTION 01330

SUBMITTALS

PART 1 GENERAL

1.01 REQUIREMENTS INCLUDED

A. Procedures

B. Manufacturers Instructions

C. Manufacturers Certificates

1.02 PROCEDURES

A. Submittals shall be furnished before fabrication or installation occurs. All submittals shall be evaluated and either approved or rejected by the COR within 14 days after their receipt. A minimum of four (4) copies of submittals shall be supplied to the COR.

B. If the Contractor intends to provide or install an item that is an "or equal" or differs from that which is specified or shown on the drawings, he/she shall submit all product data, revised drawings or new drawings to the COR. for approval.

C. The contractor shall submit four sets of the manufacturer's description of all "or equals" proposed in lieu of name brands specified. This description shall include:

1. Product name and model number

2. Manufacturer

3. Product description

4. Technical data

1.03 MANUFACTURER’S INSTRUCTIONS

A. The Contractor shall provide three (3) copies of all of the manufacturers installation and maintenance instructions (written and/or drawings) to the COR.

1.04 MANUFACTURER’S CERTIFICATES

A. The Contractor shall provide all guarantees, certificates of performance, material of workmanship or warranties provided by the manufacturer or required by the specifications to the COR.

SECTION 01450

QUALITY CONTROL

PART 1 GENERAL

1.01 WORK INCLUDED

A. The 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 to meet the requirements of this specification.

PART 2 PRODUCTS

Not Used

PART 3 EXECUTION

3.01 QUALITY CONTROL SYSTEM

A. 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.

3.02 QUALITY CONTROL PLAN

A. The Contractor shall submit in writing the following:

1. Authorities and responsibilities of inspection and testing personnel.

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

B. The Contractors proposed quality control plan shall be submitted to the COR for review prior to the Contractor commencing work. The COR shall approve or disapprove the plan within 5 working days. Construction work shall not begin prior to the Contractor's receipt of written approval of the quality control plan.

C. The Contractor shall submit to the COR in writing any proposed changes to the approved plan. Proposed changes shall not be put into effect until approved in writing by the COR.

3.02 SAMPLING & TESTING

A. 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. The Contractor shall take samples and perform inspections and tests necessary to achieve the quality of construction required by the contract. Sampling and testing frequency for specific items shall be as defined in the specifications.

3.03 RECORDS

A. The Contractor shall maintain current records of all inspections and tests performed.

B. The Contractor shall certify in writing that all inspections were performed in accordance with specifications. All testing and inspection records shall be submitted to the COR upon completion of the project

3.04 CERTIFICATIONS & MEASUREMENTS

A. Offsite Produced Materials. The Contractor shall furnish certificates executed by the manufacturer, supplier, or vendor, stipulating that all offsite produced materials incorporated into the work meet the applicable requirements as shown on the drawings or specifications.

B. Quantity Measurement. The Contractor shall make all measurements for computation of quantities for all work items except those specified for payment by Designed Quantity (DQ). The Contractor shall compute the quantities for periodic progress payments; the COR will compute the quantities for final payment based on measurements taken by the Contractor. All measurements are subject to verification. The Contractor shall submit all field notes, calculation sheets, and other data used to determine quantities. The Contractor shall certify in writing as to the accuracy of the measurements and computations submitted.

3.05 BASIS OF PAYMENT

Quality Control shall be considered incidental to the bid items and no additional payment will be made.

SECTION 01720

CONSTRUCTION STAKING

PART 1 - GENERAL

1.01 WORK INCLUDED

A. This work shall consist of the construction staking of the take-out, including retaining walls and associated structures in accordance with the drawings and specifications. The work includes the furnishing of all labor, equipment, instruments, materials, transportation and other incidentals necessary to complete the construction staking in accordance with these specifications and acceptable engineering practice.

PART 2 - PRODUCTS

2.01

GOV’T FURNISHED CONTROL

A. The Forest Service will provide the Contractor with two bench marks for vertical control. AutoCad drawing files will be made available.

2.02 STAKES

A. Identification stakes and hubs shall be of sufficient length and width to provide a solid set in the ground and to provide space for marking above ground when applicable. Other dimensions and materials may be used, such as steel reinforcing bars, wire flagging and markers, and metal pins, if approved in writing by the COR. The top 2 inches of all slope, guard, reference, clearing, and structure stakes shall be painted or marked with plastic flagging. Colors used on stakes or for flagging shall be as follows:

Roads, parking lots, and parking spurs Orange

PART 3 EXECUTION

3.01

GENERAL

A. The Contractor shall be required to provide all necessary staking and control for all phases of construction. The contractor shall use the data and information shown on the project drawings to establish the location of all facilities to be constructed under this contract. The Contractor may choose any method of establishing horizontal and vertical controls provided the following minimum precision and accuracy requirements are met:

1. Accuracy requirements:

2. Minimum position closure: 1/1000

3. Vertical closure: 0.05 ft (vertical)/station (100 feet horizontal)

4. Cross section and slope stake precision:

5. Allowable deviation of cross section line projection from a true perpendicular to tangents, a true bisector of angle points, or a true radius of curves: +/-3 degrees.

6. Cross section topography measurements shall be taken so that variations in ground form a straight line connecting the cross section points will not exceed: 1.0 ft.

3.02 Marking Stakes

A. All stakes shall be legibly marked, in the format agreed upon with the COR, with a stake pencil that leaves an imprint or with waterproof ink. Marking shall conform to the nomenclature below:

PI

Point of intersection of tangents

PC

Point of curvature

POC

Point on curve

PT

Point of tangency

POT

Point on tangent

RP

Reference point

P

P-line (preliminary location line)

L

L-line (final location line)

BM

Bench mark

TBM

Temporary bench mark

BT

Begin taper (any)

ET

End taper (any)

C

Cut

F

Fill

L

Centerline

D

Ditch

W Width

3.03 Survey Notes

A. All survey data shall be neatly recorded in survey books. All survey notes shall become the property of the Forest Service. Errors shall be deleted by lining out. Date, crew names and positions, instrumentation, and weather shall be recorded in the notes at the beginning of each day's work. The party chief shall sign or initial each page of the notes immediately after the last entry for each day's work.

B. Electronically recorded survey notes shall be consecutively numbered and headed to identify the contents. The notes shall be supported and accompanied by a bound book that records the project name and for each day identifies date, crew names and positions, instrumentation, weather, type of survey, stationing of sections between which survey was performed, and survey data or sketched that cannot be electronically recorded. The party chief shall sign or initial the electronically recorded notes and Day Book immediately after the last entry for each day's work.

3.04 Stake Approval and Maintenance A. Actual construction may begin only after the Contracting Officer has reviewed the staked facility and written approval is given for construction to begin. Segments of construction may be approved as agreed upon with the COR. Approval of the construction staking will not relieve the contractor of the responsibility for maintaining the survey work, for replacing displaced or missing stakes, and for correcting errors, whether the errors are discovered during the actual survey work or in subsequent phases of the project.

3.06 BASIS OF PAYMENT

PAY ITEM

UNIT

Construction Staking ………………………………………………………….……………….Lump Sum

SECTION 02220

SELECTIVE DEMOLITION

PART 1 GENERAL

1.01 WORK INCLUDED

A. This work shall consist of the removal and satisfactory disposal of timber curbing & steps, timber retaining walls, wooden handrails, designated concrete sidewalk, asphalt surfacing & other items as shown on the drawings and specified herein.

PART 2 PRODUCTS

Not Used

PART 3 EXECUTION

3.01 REMOVAL OF STRUCTURES

A. The Contractor shall execute all demolition work in a way not to damage adjacent facilities designated to remain.

3.02 DISPOSAL

A. All demolition debris shall become the property of the Contractor and be removed from Government Land.

3.03 BASIS OF PAYMENT

PAY ITEM

PAY UNIT

Selective Demolition…………………………..............................… Lump Sum

SECTION 02230

CLEARING & GRUBBING

PART 1 - GENERAL

A. Work included in this section covers clearing and grubbing within the work limits as specified herein for the construction of the public take-out.

PART 2 - PRODUCTS

None

PART 3 - EXECUTION

3.01 CLEARING

A.

Clearing shall consist of clearing the project area of all trees, brush and other vegetation, rubbish and all objectionable material. Clearing debris shall be removed from Government property and be disposed of in accordance with local & State regulations.

3.02 GRUBBING

A. In cut sections, the removal of stumps and roots shall be done to such depth that in no case will any portion remaining extend closer than 18 inches to any sub grade or slope surface.

B. All grubbing debris shall become the property of the Contractor and be removed from the site.

Clearing & Grubbing…………………………………………..………. Lump Sum

SECTION 02315

STRUCTURAL EXCAVATION FOR MINOR STRUCTURES

PART 1 - GENERAL

1.01 WORK INCLUDED

A. This work shall consist of excavation to construct retaining walls and slabs, disposal of excess excavation, drainage excavation, and excavation of unsuitable material if needed for the complete construction of the take-out.

B. Site grading shall consist of the excavation and disposal of all excavated material, regardless of its nature, that is not included under other pay items listed in the Schedule of Items.

C. Consider the elevations of the bottoms of footings or foundations shown on the drawings to be approximate elevations. The Contracting Officer may order, in writing, changes in the elevations of footings and foundations when necessary to secure a satisfactory foundation.

PART 2 - PRODUCTS

2.01 FILL MATERIAL

A. Backfill material shall consist of suitable material from excavation.

PART 3 - EXECUTION

3.01 EXCAVATION

A. Excavate trenches or foundation pits to a width and length that allows room for work. Provide a firm foundation of uniform density throughout its length and width. Do not place footings until the depth of excavation and the foundation material have been approved in writing by the Contracting Officer.

B. Follow Occupational Safety and Health Administration (OSHA) safety regulations (29 CFR, part 1926, subpart P, Excavation), or OSHA-approved State Plan requirements for sloping the sides of excavations and for using shoring, bracing, and other safety features.

3.02 Utilization of Excavated Materials

A. Conserve suitable material for structural backfill from excavated material. Do not deposit excavated material near a waterway. Do not stockpile excavated material closer than 5 feet from the edge of the excavation.

B. Unsuitable material shall be excavated and disposed off government land. Excavated areas shall be backfilled with suitable material when necessary to complete the work. Frozen material shall not be used for backfill. Rocks that are too large to be incorporated into the backfill shall be broken for incorporation or moved to approved locations.

3.03 CHANNEL PRESERVATION

A.

Perform work in or next to a running waterway as follows:

(a) Excavate inside cofferdams, sheeting, or other approved separations such as dikes or sandbags.

(b) Do not disturb the natural bed of the waterway adjacent to the work.

(c) Do not pump water from foundation excavations directly into live streams. Pump water into settling areas or as approved by the COR.

3.04 COFFERDAMS

A.

Use cofferdams when excavating under water or when the excavation is affected by groundwater.

B.

Shore and construct cofferdams according to OSHA standards. Ensure that cofferdams:

(a) Extend below the bottom of the footing.

(b) Are braced to withstand expected pressures and loads without buckling, and are secured in place to prevent tipping or movement.

(c) Are as water-tight as practicable.

(d) Provide sufficient clearance for the placement of forms and the inspection of their exteriors.

(e) Provide for dewatering.

(f) Protect fresh concrete against damage from sudden rises in water elevation.

(g) Prevent damage to the foundation by erosion.

C.

When no longer required, remove all cofferdam material down to the natural bed of the waterway.

Do not disturb, damage, or mar finished structure.

3.05 DEWATERING

A.

While placing concrete, locate and operate the pumps outside the foundation form. Pumping from the interior of any foundation enclosure or form is not permitted.

3.06 BASIS OF PAYMENT

Excavation, Backfill and Disposal..............................……………Lump Sum

SECTION 02370

EROSION AND SEDIMENTATION CONTROL

PART 1 – GENERAL

1.01 WORK INCLUDED

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.

PART 2 – PRODUCTS

2.01 SILT FENCE

A. Silt fence shall be prefabricated with 1-1/2" square, hardwood posts, Mirafi Silt Fence, or approved equal.

B. Straw bales shall be approximately 36 inches in length, rectangular shape and weigh approximately 65 pounds.

PART 3 – EXECUTION

3.01 INSTALLATION

A. All erosion control devices shall be installed prior to commencing clearing & grubbing operations.

B. Install silt fence in accordance with manufacturer’s instructions. Caution shall be used when installing along streams and creeks. Install at locations as directed by the COR.

3.02 MONITORING

A. The Contractor shall monitor the performance of all erosion and sediment control practices and make minor adjustments as needed on a day-to-day basis. Silt fences shall be inspected after each rainfall and sediments deposits must be removed when they reach a maximum of 1/3 the height of the fence. Deteriorated or damaged fabrics must be replaced immediately.

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

Erosion and Sedimentation Control ………………..…………...…Lump Sum

SECTION 02710

SUBSURFACE DRAINAGE

PART 1 GENERAL

1.01 WORK INCLUDED

A. This work consists of furnishing and installing gravel drains behind the concrete retaining walls as shown on the drawings and as specified herein.

PART 2 PRODUCTS

A. Filter stone shall be NCDOT #57 stone.

B. Drain pipe shall be 4” dia. perforated PVC pipe. Outlet pipe shall be schedule 40 PVC pipe. Polyethylene pipe will not be allowed.

C. Filter fabric shall be 140NL as manufactured by Mirafi.

PART 3 EXECUTION

A.

Install gravel drains at the locations and to the details shown on the drawings.

3.03 BASIS OF PAYMENT

As shown on Bid Schedule

SECTION 02715

STORM DRAINAGE

PART 1 GENERAL

A.

This work consists of furnishing and installing storm drainage structures as shown on the drawings and as specified herein.

PART 2 PRODUCTS

A.

Precast concrete catchbasin and cast iron grate shall be as shown on the drawings or approved equal.

B.

Solid drain pipe shall be 12: diameter Schedule PVC pipe.

C.

Drainage chambers shall be as shown on the drawings.

D. Filter fabric shall be 140NL as manufactured by Mirafi.

PART 3 EXECUTION

A.

Install storm drainage systems at the locations and to the details shown on the drawings.

B.

The exact location of the catchbasin shall be determined by the COR after rough grading is completed.

PART 4 BASIS OF PAYMENT

A.

Payment will be made as shown on the Bid Schedule.

SECTION 02920

PERMANENT & TEMPORARY SEEDING

PART 1 – GENERAL

1.01 WORK INCLUDED

A. This section covers the requirements for permanent and temporary seeding of areas of disturbance within the project area.

PART 2 – PRODUCTS

2.01 PERMANENT SEEDING – Spring and Summer (February 1rst. to Aug 1rst.)

Seed Mix

Application rate (lbs./Ac)

Creeping Red Fescue

Hard Fescue

Rye (cereal small grain)

2.02 TEMPORARY and WINTER SEEDING

Seed Mix

Application rate (lbs./Ac)

Small Grain Cereal Rye

2.03

FERTILIZER

A. Fertilizer shall be 17% Nitrogen, 17% Phosphorus, 17% Potassium

2.04 MULCH

A. Mulch shall be grain straw applied at a rate of 2 tons per acre.

PART 3 – EXECUTION

3.01 APPLICATION

A. Temporary seeding shall be applied to any areas of disturbance that shall be left uncovered for more than 5 days or as directed by the COR.

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

C. Seed shall be uniformly sown over the area at the rate specified by means of a drop-type spreader, cultipacker seeder or hydroseeder.

3.02 BASIS OF PAYMENT

Permanent and Temporary Seeding ……………….….………………Lump Sum

SECTION 03100

CONCRETE FORMWORK

PART 1 – GENERAL

1.01 WORK INCLUDED

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

PART 2 - PRODUCTS

2.01 FORMS

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

B. Form oil shall be nonstaining type.

2.02 EXPANSION JOINTS

A. Expansion joints shall be pressure treated #2 Southern Yellow Pine as shown on the drawings.

PART 3 - EXECUTION

3.01 FORM CONSTRUCTION

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.

3.02 JOINTS

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

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

3.03 BASIS OF PAYMENT

NOT A PAY ITEM. Incidental to 03300 Cast in Place Concrete.

SECTION 03200

CONCRETE REINFORCEMENT

PART 1 – GENERAL

1.01 WORK INCLUDED

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

1.02 REFERENCES

ASTM A497

Welded Deformed Steel Wire Fabric for Concrete Reinforcement

ACI 318

Building Code Requirements for Structural Concrete

ACI SP-66

American Concrete Institute – Detailing Manual

PART 2 - PRODUCTS

2.01 REINFORCING

A. Reinforcing steel shall comply with ASTM A615, Grade 60, unless otherwise shown on the drawings.

B. Reinforcing mesh shall comply with ASTM A185 and shall be gauge & mesh as shown on the drawings.

PART 3 – EXECUTION

3.01 PLACEMENT

A. Reinforcement bars & mesh shall conform to the sizes & spacings as shown on the drawings.

B. Field bending & cutting shall be permitted if performed in accordance with ACI 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. Reinforcement shall be secured against displacement caused by construction loads or placing of concrete. All bar intersections shall be tied with annealed wire of not less than 16 gauge.

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

3.03 BASIS OF PAYMENT

NOT A PAY ITEM. Incidental to 03300 Cast in Place Concrete.

SECTION 03300

CAST-IN-PLACE CONCRETE

PART 1 GENERAL

1.01 WORK INCLUDED

A. This work includes furnishing and placing all cast-in-place concrete, including retaining walls and sidewalks.

1.02 REFERENCES

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

ACI 301 - Specifications for Structural Concrete for Buildings

ACI 305 - Hot Weather Concreting

ACI 306 - Cold Weather Concreting

PART 2 PRODUCTS

2.01 CONCRETE

A. Aggregate shall conform to the requirements of AASHTO M6 and AASHTO M80, and shall be well graded from fine to coarse within designated limits.

B. Portland Cement shall comply with ASTM C150, Type 1. Supplier shall provide mill certification of compliance with specification.

C. Water shall be clean, fresh, and free from injurious amounts of minerals or foreign substances.

D. Additives or air entrainment agents shall comply with ASTM C-260.

E. All concrete shall have a minimum compressive strength of 3500 psi at 28 days. 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 . Slump shall not exceed 3 inches for vibrated concrete. The design of the concrete mixture shall be the responsibility of the Contractor.

PART 3 EXECUTION

3.01 PROTECTION

A. No concrete shall be discharged into live streams.

3.02 PREPARATION

A. The subgrade and all formwork shall be inspected and approved by the COR prior to work beginning.

B. The Contractor shall give the COR a minimum of 24 hours written notice before placing concrete.

3.03 PLACING CONCRETE

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. The batch ticket shall show the time the mix was batched.

B. All concrete shall be placed within 1-1/2 hours from the time of mixing. No concrete shall be placed after it has started its initial set or with a temperature above 90 degrees F.

C. Concrete shall be placed in such a manner as to avoid segregation of the mixture. Concrete shall be spread in horizontal layers when practicable and shall not be freely dropped more than five (5) feet. 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. Concrete shall be consolidated within 15 minutes after placement. A minimum of two vibrators, in working order, shall be on the job during concrete placement. If consolidation of concrete with mechanical vibrators is impractical, hand tamping, rodding, and spading shall be permitted.

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

F. The Contractor is responsible for making and testing cylinders from the concrete being incorporated in the project. Slump testing will be performed by the Contractor in accordance with AASHTO T-119. Slump shall not exceed 3" for vibrated concrete.

3.04 FINISHING & CURING

A. 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. Final finish shall be medium broom for slabs, ramps & stairs.

B. Curing

1. Concrete shall be protected against rapid drying & cured in accordance with ACI 308 Guide to Curing Concrete.

3.05 WEATHER LIMITATIONS

A. Cold weather concreting shall meet the requirements of ACI 306R-99.

B. Hot weather concreting shall meet the requirements of ACI 305R-99.

3.06 SAMPLING & TESTING

A. 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.

B. 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

C. Testing frequency shall be one sample or test per every 10 CY or truck load.

D. Test results shall be submitted in writing to the COR.

3.06 BASIS OF PAYMENT

Cast in Place Concrete (Footings and walls)......................................…....Cubic Yard

Cast in Place Concrete (Slabs, ramps and steps)...............................…....Square Feet

SECTION 04410

STONE MASONRY VENEER

PART 1 - GENERAL

1.01 WORK INCLUDED

A. This section shall consist of furnishing and installing all stone masonry veneer as called for on the plans or specified herein. The veneer shall be installed on the prepared concrete retaining walls in accordance with these specifications and in conformity with the lines, grade, sections, and dimensions shown on the drawings.

PART 2 - MATERIALS

2.01 STORAGE & DELIVERY

A. The Contractor shall schedule deliveries to avoid delays and to avoid greater accumulations than can be suitably stored at site.

B. Stone shall be stored on wood supports clear of the ground. Edges and exposed faces shall be protected from damage and from staining. Stone shall be stacked in the same position as the intended position in finished work.

2.02 MATERIALS

A. The Contractor shall submit samples of stone for approval by the Contracting Officer. Stone shall match work done at the existing parking lot retaining wall and Toilet Building.

B. Mortar shall be non-staining Cement as approved by the COR.

C. Fine aggregate shall meet the requirements of ASTM C 144, natural, and pass the No. 6 mesh screen. Sand for pointing mortar shall pass the No. 12 sieve.

D. Water shall be of potable quality.

PART 3 EXECUTION

3.01 SAMPLE WORK

A. Prior to commencing stone work, the Contractor shall confer with the COR and erect a small sample wall 4' long x 3' high for the COR's approval as to color, size, texture, joints, and pattern. This work shall not be a part of a structure and shall remain in place until the project is completed and accepted at which time it shall be torn down and removed from the site.

3.02 GENERAL

A. All masonry shall be constructed by qualified Masons with a minimum of 5 years experience.

B. Stone shall be laid in an uncoursed pattern to match existing rockwork at the site.

C. Care shall be taken to prevent the bunching of small stones or stones of the same size.

D. The maximum and minimum projections of rock faces beyond the surface plane shall not vary from each other by more than 2 inches.

3.03 MORTAR BEDS & JOINTS

A. Each stone shall be set in a full bed of mortar and topped to an even bearing. Sawing through mortar joints to correct bearing or adjust joint shall not be allowed.

B. If a stone is loosened after the mortar has taken initial set, it shall be removed, the mortar cleaned off, and the stone re-laid with fresh mortar.

C. All joints shall be recessed and rubbed smooth to leave stones projecting with mortar recessed. Joints shall generally be 1/2” to 1” in thickness.

3.04 WEATHER LIMITATIONS

A. No placing of stone shall be done in freezing weather except by written permission from the COR and then only by the use of such methods as prescribed for preparing the materials and protecting the work after laying. Such permission and the use of the methods prescribe shall not, however, release the contractor from the obligation to build a satisfactory structure. All work damaged by cold weather shall be removed and replaced. In hot or dry weather the masonry shall be satisfactorily protected from the sun and shall be kept wet for a period of at least three days after completion.

B. Masonry which is less than three days old shall be protected from freezing by methods approved by the COR.

3.09 BASIS OF PAYMENT

Stone Masonry Veneer ……………………………….…..…. Square Foot

SECTION 05520

GUARDRAILS and HANDRAILS

PART 1 GENERAL

1.01 WORK INCLUDED

A. This work consists of furnishing and installing guardrails and handrails & associated fittings as shown on the drawings and as specified herein.

PART 2 PRODUCTS

2.01 Guardrails, handrails and posts shall be as shown on the drawings.

2.02 Handrail support brackets shall be as shown on the drawings.

2.03 PAINT

A. Primer (1 coat) shall be Pitt-Guard 95-245 Series by Pittsburgh Paints, or approved equal.

B. Paint (2 coats) shall be Pitthane 95-8600 semi-gloss by Pittsburgh Paints, or approved equal. Color shall be selected by medium gray.

PART 3 EXECUTION

3.01 SUBMITTALS

A. Contractor shall submit shop drawings for approval prior to fabrication.

3.02 INSTALLATION

A. Guardrail and handrails shall be installed to the details shown on the drawings.

B. All pieces shall be cut square on bearings, closely fitted and plumb.

3.03 PAINTING

A. No exterior painting shall be done in rainy, damp, or frosty weather or until the surface is thoroughly dry.

No paint shall be applied when the temperature is below 40 degrees or when that temperature is likely to be reached within 48 hours.

B. All paint shall be applied in accordance with the manufacturer's recommendations unless otherwise directed.

C. All coats shall be thoroughly dried before applying succeeding coats with sanding between coats where necessary. Comply with manufacturer's recommendation for drying time between succeeding coats.

D. Finish coats shall be smooth, free of brush marks, streaks, laps, or pole of paints, and skipped or missed areas. Finished metal surfaces shall be free of skips, voids or pinholes in any coat.

E. Keep brushes, rollers, and spraying equipment clean, dry, free from contaminates, and suitable for the finish required.

3.04 BASIS OF PAYMENT

Single-Rail Type …………….. .............. …………….………………………..Linear Foot

Multi-Rail Type …………….. .............. …………….………..………………..Linear Foot