Attachment_02._SOW_pdf.pdf

NATIONAL FORESTS in NORTH CAROLINA

PISGAH NATIONAL FOREST

DAVIDSON RIVER CAMPGROUND

HEMLOCKS LOOP BATH-HOUSE REPLACEMENT PROJECT

MARCH 2016

National Forests in North Carolina Engineering/Recreation/Heritage

AG-4568-S-16-0016

NFNC Pisgah Ranger District Davidson River Campground Hemlock Loop Bath House Replacement

Attachment 02

SPECIFICATION INDEX

DIVISION 1 - GENERAL REQUIREMENTS

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

DIVISION 2 - SITE WORK

02110 - Clearing 02200 - Building Demolition 02210 - Site Grading 02220 - Structural Excavation 02221 - Trenching, Backfilling and Compaction for Utilities 02250 - Compaction Control and Testing 02400 - Sheeting, Shoring, and Bracing 02530 - Dewatering 02540 - Erosion and Sedimentation Control 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 4 - MASONRY

04150 - Masonry Accessories 04220 - Concrete Unit Masonry 04410 - Stone Masonry

DIVISION 5 - METALS

05500 - Metal Fabrications

DIVISION 6 - WOOD AND PLASTICS

06100 - Rough Carpentry 06200 - Finish Carpentry

DIVISION 7 - THERMAL AND MOISTURE

07110 - Membrane Waterproofing 07210 - Building Insulation 07920 - Sealants and Caulking

DIVISION 8 - DOORS AND WINDOWS

08210 - Metal Doors 08710 - Finish Hardware 08840 - Glazing Plastics

DIVISION 9 - FINISHES

09330 - Floor Tile 09800 - Special Wall Covering 09900 - Painting

DIVISION 10 - SPECIALTIES

10800 - Toilet and Bath Accessories

DIVISION 15 - MECHANICAL

15060 - Pipe and Pipe Fittings 15100 - Building Valves 15213 - Waterlines 15214 - Disinfection of Waterlines 15254 - Pipe Insulation 15311 - Gravity Sewers 15460 - Plumbing Fixtures and Trim

DIVISION 16 - ELECTRICAL

16010 - Basic Electrical Requirements 16100 - Basic Materials and Methods 16402 - Underground Electrical Service 16500 - Lighting

DIVISION 1 - GENERAL REQUIREMENTES

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

SECTION 01010

SUMMARY OF WORK

PART 1 - GENERAL

A. The Contractor is to provide the complete construction of the bath-house as specified herein as shown on the drawings.

B. 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 safety fences around all open excavations, storage areas and around the perimeter of the new building sites.

D. Campground Operations

1. The campground is open all year. The Contractor must coordinate daily construction activities with the CFA campground manager.

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 Contractor will be allowed to use campsites #24 and #26 adjacent to the new bath-house for storage of materials and parking of construction equipment.

F. Existing Facilities

1. The Contractor will have access to the other restroom facility in the Hemlock Loop during the life of the Contract.

2. The Contractor will be allowed to use electricity free of charge for the construction of this project only. Any modification to the existing MDP for construction purposes shall be approved by the COR. Remove all modifications after completion of project.

3. Potable water will be available at the job site for construction only.

G. Safety

1. No trenches will be left open overnight.

2. Electrical switches will be locked in the “OFF ” position.

H. Project Closeout

1. Instruction of Government Personnel in Use of Facilities

It is the responsibility of the Contractor to see that the proper manufacturer's representative, subcontractors, contractor's superintendents, etc., are available at completion of the job and before occupancy to provide instructions in the use of all facilities and equipment and to train personnel in the proper use and maintenance of the building, equipment controls, switches, valves, etc.

2. Operating and Maintenance Manuals

The Contractor shall furnish the following:

a. Instructions for maintenance of all systems.

b. Copies of hardware schedule.

c. Shop drawings and brochures on all special items and equipment.

d. Three copies of the complete operating and maintenance manual for mechanical and electrical equipment. The bound manual shall contain the following:

(1) Word description of the systems.

(2) General operating instructions, including copies of posted specific instructions.

(3) Maintenance instructions, followed by tabulated manufacturer's descriptive literature, shop drawings, performance curves and rating data, spare parts lists, and maintenance manuals.

(4) Warranties.

SECTION 01050

FIELD ENGINEERING

A. The locations of all proposed new work relative to existing features are indicated on the construction drawings. Bench marks for vertical control are to be provided by the C.O.

The Contractor shall establish building corners and the COR shall determine the finish floor elevation.

B. Construction staking for the installation of all utilities shall be the responsibility of the

Contractor. Construction Staking by the Contractor shall be approved by the COR prior to commencing construction on that part.

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. Building Submittals:

a. Finish Hardware

b. Floor Tile

c. Mechanical and Plumbing Equipment Data and Drawings.

d. Electrical Equipment Data and Drawings

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

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

DIVISION 2 - SITE WORK

02110 – Clearing 02200 – Building Demolition 02210 – Site Grading 02220 – Structural Excavation 02221 – Trenching, Backfilling, and Compacting 02250 – Compaction and Testing 02400 – Sheeting, Shoring, and Bracing 02530 - Dewatering 02540 – Erosion and Sedimentation Control 02720 – Aggregate Base 02821 – Seeding, Fertilizing and Mulching

SECTION 02110

CLEARING

A. Work included in this section covers clearing, grubbing, and removal of all vegetation within the construction area as shown on the drawings or specified herein for the construction of the building and installation of new site utilities.

B. Utility line clearing shall be kept to a minimum and shall, in no case exceed 10-foot width.

PART 2 – PRODUCTS

A. None

PART 3 - EXECUTION

A. Clearing and grubbing shall consist of clearing the area of all trees designated or marked to be removed, brush and other vegetation, rubbish and all objectionable material, and shall include grubbing stumps that may interfere with the installation of utility lines or building foundations.

B. All logs, brush, stumps and debris shall become the property of the Contractor and shall be hauled-off Government land.

1. Brush may be chipped on-site and scattered as directed by the Contracting Officer.

C. Trees shall be felled so as not to damage trees outside of the construction area or trees that are to remain.

D. Trees that are damaged will be painted with tree wound dressing on all cuts and wounds.

SECTION 02200

BUILDING DEMOLITION

PART 1 – GENERAL

Work included in this section covers the removal of the existing bath-house.

A. None

PART 3 – EXECUTION

A. Disconnect electrical service to the buildings prior to demolition.

B. The Forest Service reserves the right to remove and retain ownership of any plumbing and electrical equipment from the building prior to the “Notice to Proceed”.

C. Dispose of all refuse at a State Approved facility.

SECTION 02210

SITE GRADING

A. This section covers all required site grading, including excavation and the placement of interior and exterior fills and the final dressing of the site within the construction area.

PART 2 - PRODUCTS

A. Fill Material

1. The material for the interior and exterior fills shall consist of surplus excavated material or imported fill consisting of a mixture of soil, gravel talus rock, disintegrated granite, semi-gravel, sand, caliche, shale, scoria, clinkers, cinders, or other suitable material.

2. The material shall be free from organic vegetative matter.

3. The maximum size of any particle shall not be greater than 3" in diameter.

4. Oversize material may either be removed or broken down to the specified dimension by any method which accomplishes reduction to that size.

5. The removal or the breakdown of oversize material to the specified size shall be done at the material source.

B. Bedding material under concrete slabs shall be NC DOT approved ABC stone.

PART 3 - EXECUTION

A. Strip all vegetation and the upper 8" of the topsoil from the area to be occupied by the building.

B. The Contractor shall supply all fill material.

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

D. The root structure of all existing trees that are to remain shall not be disturbed. Do not operate heavy equipment within 10' of trees that are to remain.

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

F. Compact Earth Fills under all concrete slabs, ramps, and footings.

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

G. 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.

1. Finish grades adjacent to the building shall be sloped as shown on the drawings to provide surface drainage away from the building walls in all directions.

SECTION 02220

STRUCTURAL EXCAVATION

A. This section consists of the necessary excavation for the building foundation and other structures.

PART 2 - PRODUCTS

A. Silt fence in accordance with Section 02540.

PART 3 - EXECUTION

A. Install silt fences or other means of silt entrapment around all structural excavations.

B. Trenches or foundation pits for structures or structure footings shall be excavated to the lines, grades, and elevations as shown on the drawings. They shall be of size to permit the placing of the full width and length of structure footings or tanks as shown on the drawings.

C. Boulders, logs, or other objectional material encountered in excavation shall be removed.

1. All rock or other hard foundation material shall be cleaned of all loose material, cut to a firm surface, either level, and stepped or serrated as shown on plans or specified herein.

2. All seams or crevices shall be cleaned out and grouted with neat cement grout.

3. All loose, disintegrated rock and thin strata shall be removed.

4. When concrete is to rest on a surface other than rock, special care shall be taken not to disturb the bottom of the excavation.

D. After each excavation is completed, the Contractor shall notify the C.O. to that effect. No concrete shall be placed until after the C.O. has approved the depth of the excavation and the character of the foundation material.

SECTION 02221

TRENCHING, BACKFILLING, AND COMPACTING FOR UTILITIES

A. Work included in this section covers all trenching, backfilling, and compacting for the installation of all utility lines.

PART 2 - PRODUCTS

A. Initial Backfill - imported sand.

B. Subsequent Backfill - excavated material free from rock larger than four inches in greatest dimension, clods, and debris.

C. Plastic identification tape shall be Aluminum foil core sandwished between two layers of polyester with a total thickness of 0.005 inch. Text color shall be black and background colors as follows: Electric: Red, Sewer: Green, Water: Blue, Cable TV: Orange, Natural Gas:

Yellow, Telephone: Orange. The tape shall be as manufactured by:

Brady Corporation 6555 W. Good Hope Road Milwaukee, WI 53223 Tel. 1-800-448-8630 or approved equal. All buried utilities shall be identified with appropriate tape.

PART 3 - EXECUTION

A. Trenches shall be excavated through any or all materials regardless of natural substances.

1. A firm, full-length support shall be formed for all underground pipe.

2. If the bottom of any excavation is taken out beyond the elevations shown on the plans, it shall be refilled at the Contractor's expense with initial backfill material compacted to the density of adjacent undisturbed material.

3. Where the excavated material is rock or other unsatisfactory bedding material, the trench shall be excavated below the final grade of the pipe invert a distance of four inches. The trench shall then be backfilled to the grade of the pipe with initial backfill material.

4. The Contractor shall take all precautions to assure that water does not accumulate in trenches while utility lines are being constructed.

5. Any pipe damaged by backfill operations shall be replaced by new pipe.

6. Trenches shall be bedded to the proper elevation for installing the pipe with initial backfill material. All backfill material within six inches of pipe shall be initial backfill material.

7. Initial backfill shall be deposited and compacted to a density equal to or greater than that of the existing soils for all piping. Subsequent backfilling shall not be compacted except for areas within roadways, parking or sidewalks.

8. Compaction shall be accomplished by the use of a mechanical vibrating tamper.

9. All trenches not within roadway areas shall be mounded 4 to 6 inches to allow for settlement.

10. Bury ID Tape 6 inches below ground level. Follow tape manufacturer’s instructions.

B. Backfilling shall not be performed on any section of pipeline without prior approval by the

C.O..

C. Areas where utility lines are located within roads, camping sites, or trails shall be dressed and graded to a condition similiar to one prior to the installation of the utility. Restore all drainage structures affected by the construction of this project.

SECTION 02250

COMPACTION CONTROL AND TESTING

A. This section covers all compaction for earth fills under footings, ramps, slabs, walkways, utility tanks, 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 earth fills under concrete slabs, ramps, footings, and walkways shall be placed in approximately 12" lifts and be compacted to a uniform density until no visible settlement occurs.

C. Backfill around structures and supports shall be done in 12" 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 02400

SHEETING, SHORING, AND BRACING

A. Scope: Includes additional support that the sides of a trench or excavation may require to remain stable during construction operations.

PART 2 - PRODUCTS

A. Timber or metal members used by the Contractor shall provide adequate support of the soils during his work. The Contractor shall be responsible for selection of proper materials to maintain adequate support.

A. Excavations and sides of trenches shall be supported with adequate materials as necessary for the safety of personnel and protection of the pipeline or sewerage tanks before backfilling.

B. The installation and removal of all lagging, sheeting, shoring, piling, and bracing shall be such to maintain the required trench or excavated section and to maintain the undisturbed state of the soils at and below the bottom of excavation.

C. Sheet piling and timbers in trench excavations shall be withdrawn in a manner to prevent damage to the pipe or tanks.

D. All sheeting and shoring shall be removed when safe to do so.

SECTION 02530

DEWATERING

A. Scope: Includes requirements for removing water from excavations and trenches and protecting excavated areas from damage by water.

PART 2 – PRODUCTS

A. Pumped groundwater or storm runoff shall be ponded before discharge to any live stream.

PART 3 – EXECUTION

A. The Contractor shall furnish, install, and operate all necessary equipment to keep excavations and trenches free from water during construction; and shall dispose of water without causing damage to public or private property or causing a nuisance to the public.

B. Peculiar or unusual groundwater conditions revealed upon excavation shall be called to the attention of the C.O. before corrective measures are taken.

C. Control of groundwater shall be such that softening of the bottom of excavations or formation of quick conditions or boils shall be prevented. Dewatering systems shall be designed and operated to prevent removal of the natural soils.

D. During installation of pipelines and sewers, excavation shall be kept free of water. The static water level shall be drawn down below the bottom of the excavation to maintain the undisturbed state of the natural soils and allow the placement of backfill to the required density. The dewatering system shall be operated so the groundwater level outside excavation is not reduced to an extent that would damage or endanger adjacent structures or property.

E. The release of groundwater to its static level shall be performed in a manner to maintain the undisturbed state of the natural foundation soils, prevent disturbance of compacted backfill, and prevent flotation or movement of structures, pipelines, and sewers.

F. Ditch lines shall be excavated to protect trenches from surface runoff at all times. Daylight all trenches left open where feasible.

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.

B. Related Specifications:

1. 02821 – Seeding

PART 2 - PRODUCTS

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

PART 3 - EXECUTION

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

B. 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.

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

SECTION 02720

AGGREGATE BASE

PART 1 GENERAL

A. WORK INCLUDED

1. This item shall consist of furnishing, hauling, and placing one or more courses of aggregate on an approved sub grade or base.

PART 2 PRODUCTS

A. AGGREGATE

1. Aggregate base course shall be NC DOT approved ABC.

2. The commercial source shall provide a statement from a certified testing facility stating that the aggregate from this source meets the requirements of these specifications and the designated gradation.

PART 3 EXECUTION

A. HANDLING & STORAGE

1. Aggregate shall be handled in such a manner as to minimize segregation.

2. Any method of stockpiling aggregate which allows the stockpile to become contaminated with foreign matter or causes excessive degradation of the aggregate shall not be permitted.

B. PREPARATION

1. The sub grade shall conform to the grades and lines shown on the drawings and shall be approved in writing by the COR before placing the base course.

C. MIXING & PLACING

1. Water shall be added to the aggregate in an amount necessary to provide a moisture content suitable for compaction. The moisture content of the aggregate shall be uniform throughout.

2. The aggregate shall be spread in a uniform layer, with no segregation of size, and to a loose depth that shall have the required thickness when compacted. If the required compacted depth of any aggregate base or surface course exceeds 6 inches, it shall be placed in two or more layers of approximate equal thickness.

3. Hauling equipment shall be dispersed over the surface of the previously constructed layer to minimize rutting or uneven compaction.

4. The surface of each layer shall be bladed during the compaction operations to remove irregularities and produce a smooth even surface that will drain.

5. The thickness of the compacted base shall not vary more than 1/2 inch from the required thickness shown on the drawings. The compacted thickness shall not be consistently below the specified thickness.

6. The aggregate shall be compacted with construction or compaction equipment until shall continue until no visual displacement occurs.

SECTION 02821

SEEDING, FERTILIZING, AND MULCHING

PART 1 GENERAL

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):

Kentucky 31 Fescue: 20 lbs/acre

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

Kentucky 31 Fescue: 20 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 hay shall be uniformly spread over the area at the rate specified.

DIVISION 3 - CONCRETE

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

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 0.21bs/cf of treatment (ground contact).

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 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

a. No concrete shall be placed against a frozen base or sub-grade, no exceptions.

3. ACI 305 - Recommended Practice for Hot Weather Concrete

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

PART 2 - PRODUCTS

A. Aggregate shall conform to the requirements of Federal Specification SS-A-281, Classes 1 and 2, 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, air entrainment agents shall comply with ASTM C-260.

E. Concrete Mix Design

1. All 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. The design of the concrete mixture shall be the responsibility of the Contractor.

F. 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. Interior floors shall be float finished. Slope all interior floors to positively slope towards the drains.

5. Exterior sidewalks shall be light 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.

5. Sampling and Testing applies to building foundation and foundation slabs only.

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.

D. Welded Wire Fabric: AASHTO M-32 and M-55.

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.

DIVISION 4 - MASONRY

04150 - Masonry Accessories 04220 - Concrete Unit Masonry 04410 - Stone Masonry

SECTION 04150

MASONRY ACCESSORIES

A. This section covers all masonry accessories as shown on the drawings and as specified herein.

PART 2 - PRODUCTS

A. Vertical and horizontal reinforcing steel shall be of sizes and configuration shown on drawings.

1. Reinforcing steel shall comply with ASTM Designation A-615, intermediate grade 40.

B. Horizontal joint reinforcement shall be Dur-O-Wall, conforming to requirements of ASTM

A-82.

1. 8" concrete block - #8 Dur-O-Wall Truss.

2. 6” concrete block - #6 Dur-O-Wall Truss.

3. 4" concrete block - #4 Dur-O-Wall Truss.

C. Anchor bolts shall be of the size and type shown on the drawings.

PART 3 - EXECUTION

A. Reinforcing steel shall be installed as shown on the drawings. All concrete block cells containing reinforcing steel shall be filled solid with concrete. (not grout)

B. Horizontal masonry reinforcement shall be installed in accordance with manufacturer's recommendations and as shown on the drawings.

SECTION 04220

CONCRETE MASONRY UNIT

A. Work included in this section covers concrete block masonry and related items.

B. References

1. Standards of the Concrete Masonry Association, latest edition.

2. Concrete Masonry Handbook, Portland Cement Association

PART 2 - PRODUCTS

A. Mortar shall comply with ASTM C-270, Type M.

B. Concrete Masonry Units shall be stream-cured hollow loadbearing units meeting

ASTM C-90.

1. Faces shall be uniform in texture and free of defects which would impair finished appearance.

2. Units shall not vary from designated size more than 1/6".

3. Typical units 7-5/8" high x 15-5/8" long x 3-5/8”, 5-5/8”, and 7-5/8" wide, two or three cell type.

4. All blocks shall be Grade A units made with expanded slag or shale aggregate.

PART 3 - EXECUTION

A. All masonry walls shall be true and plumb and built to dimensions, bond, and pattern as indicated on the drawings.

1. Joints shall be 3/8" wide.

B. Provide all bond beams and special blocks where required or shown on the drawings.

C. Cores that contain vertical reinforcing steel shall be cleaned through the top of the cell by hand and filled with concrete.

1. The concrete shall be vibrated or rodded.

D. Reinforcing bars shall be installed in the cores and bond beams and anchored into concrete as shown on the drawings.

1. Cores with reinforcing steel and bond beams shall be filled with concrete.

E. All blocks shall be "buttered" on all contact surfaces with mortar.

1. Tight full mortar joints shall be placed between concrete and masonry.

2. There shall be full mortar coverage of the block face shells in both horizontal and vertical joints.

F. All exposed wall surfaces shall be kept clean and free of mortar or concrete splotches.

1. Wall and all joints shall be pointed and masonry cleaned.

2. Completed walls shall be cleaned with a detergent cleaner containing no muriatic acid.

G. No placing of masonry shall be done in freezing weather (Below 40 degrees F. during installation) or when the temperature is forecasted to drop below 40 degrees after installation, unless an approved enclosure tent is build over the entire structure and kept heated for three days after completion of the work.

H. In hot or dry weather, the masonry shall be protected from the sun and shall be kept wet for a period of three days after completion.

SECTION 04410

STONE MASONRY

A. General

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

PART 2 - MATERIALS

A. Field Stone shall be 1½ to 2½ inches thick, “Tennessee” Field Stone.

B. Prior to commencing stone work, the Contractor shall confer with the C.O. and shall erect a small sample wall approximately 4'0" long x 3'0" high for the C.O.'s approval as to color, size, texture, joints, and pattern. This work shall not be a part of the structure, and the final approved sample shall remain in place until the structure is completed and accepted at which time it shall be torn down and removed from site.

C. Schedule deliveries to avoid delays and to greater accumulations than can be suitably stored at site.

D. Store stone on wood supports clear of ground. Protect edges and exposed faces from damage and from staining. Stack stone in same position as intended position in finished work.

E. Arrange storage in approximate order of use to avoid excessive rehandling.

F. Mortar

1. Non-staining Cement: (Approved by C.O.)

2. Fine Aggregate: ASTM C 144, natural, pass 6 mesh screen. Sand for pointing mortar, pass No. 12 sieve.

3. Water: Potable quality

4. Hydrate Lime: ASTM C 207, Type S.

G. Workmanship

1. Placing Stone

When the masonry is to be placed on a prepared foundation bed, the bed shall be firm and normal to, or in steps normal to, the face of the wall before any stone is placed. When it is to be placed on foundation masonry, the bearing surface of this masonry shall be cleaned thoroughly and wetted immediately before the mortar bed is spread.

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

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

Large stones shall be used for the bottom courses and the number of large selected stones shall decrease in the corners. In general, the stones shall decrease in size from the bottom of the top of work.

All stones shall be cleaned thoroughly and wetted immediately before being set, and the bed which is to receive them shall be cleaned and moistened before the mortar is spread.

They shall be laid with their longest faces horizontal in full beds of mortar, and the joints shall be flushed with mortar. The exposed faces of individual stones shall be parallel to the faces of the walls in which the stones are set.

At least 80% of the face area of the finished wall shall consist of stones laid on a horizontal bed so that a stable and horizontal appearance results. Stones shall be laid in a full bed of mortar. Care shall be exercised to keep exposed faces free of mortar. The maximum and minimum projections of rock faces beyond the surface plane shall not vary from each other by more than 2 inches.

The stones shall be so handled as not to jar or displace the stones already set. Suitable equipment shall be provided for setting stones larger than those that can be handled by two men. The rolling or turning of stones on the wall will not be permitted. If a stone is loosened after the mortar has taken initial set, it shall be removed, the mortar cleaned off, and the stone relaid with fresh mortar.

2. Bed and Joints

Bed surfaces of face stone shall be approximately normal to the faces of the stones for about 2 inches and from this point may depart from a normal plane not to exceed 2 inches in 12 inches. Beds for face stone may vary from 1/2 to 2-1/2 inches in thickness. They shall not extend in an unbroken line thru more than five stones. Joints may vary from 1/2 to 2-1/2 inches in thickness. They may be at angles with the vertical from 0 to 45 degrees. Face stone shall bond at least 6 inches longitudinally and 2 inches vertically. At no place shall corners of four stones be adjacent to each other. The stone shall be hammer dressed to remove any thin or weak portions. Face stones shall be dressed to provide bed and joint lines that do not vary more than 1-1/2 inches from true lines and to insure the meeting of bed and joint lines without the rounding of the corners of the stones in excess of 1-1/2 inches in radius.

3. Headers at Corners

Headers shall be distributed uniformly throughout the walls of structures so as to form at least one-fifth of the exposed faces. They shall be of such lengths as to extend from the front face of the wall into the backing at least 12 inches. When a wall is 18 inches in thickness, the headers shall extend entirely thru from front to back face.

4. Pointing

Both bed and vertical joints shall be filled with mortar and struck off with a rounded wooden tool so as to leave a round depression in the mortar from one-half to three fourths of an inch in width and from one-fourth to three-eights of an inch in depth.

5. Coping

Copings, if called for, shall be as shown on the plans. Where copings are not called for, the top of the wall shall be furnished with stones wide enough to cover the top of the wall. Stone shall be laid in such a manner that the top course is an integral part of the wall.

7. Weather Limitations

No placing of rock masonry shall be done in freezing weather (Below 40 degrees F.

during installation) or when the temperature is forecasted to drop below 40 degrees after installation, unless an approved enclosure tent is build over the entire structure and kept heated for three days after completion of the work.

Such permission and the use of the method prescribed shall not, however, release the Contractor from his 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.

DIVISION 5 - METALS

05500 - Metal Fabrications

SECTION 05500

METAL FABRICATIONS

A. Work in this item includes all miscellaneous metal and other related items.

PART 2 - PRODUCTS

A. I-beams, steel straps, steel angles and other miscellaneous steel shall conform to

ASTM A-36.

B. Block vents shall be as shown on the drawings.

A. The Contractor shall provide all framing and falsework necessary for the erection.

B. At final attachment, all miscellaneous metal and other items shall be rigid and secure.

C. After erection, touch up field connections and abraded places on all steel with shop paint.

D. All black steel items shall be shop primed.

DIVISION 6 - WOOD AND PLASTICS

06100 - Rough Carpentry 06200 - Finish Carpentry

SECTION 06100

ROUGH CARPENTRY

A. This section includes rough carpentry.

B. Grading and Standards

1. Southern Pine shall conform to Federal Specification MM-L-751H and to the latest grading rules of the Southern Pine Association. All lumber shall be grade-certified by the Association.

2. All plywood shall conform to PS-1-74 and to the latest standards of the American

Plywood Association or Hardwood Plywood Institute. All plywood shall be certified by the appropriate grade grademark of the Association.

3. Kiln dried lumber shall not exceed 15% moisture content as determined by ASTM Test

Method D-2016; all other lumber shall not exceed 20%.

4. Pressure-treated lumber shall be ground contact, 0.21 pcf CA – B.

PART 2 - PRODUCTS

A. Structural framing shall be Douglas Fir #2; Southern Yellow Pine #2.

B. Boards, furring, and formwork shall be Douglas Fir, construction grade; Southern Yellow

Pine, construction grade.

C. Sill plates and wood in contact with concrete or masonry shall be PT Southern Yellow Pine.

D. Plywood Sheathing shall be exterior type "C" - CEXT-APA, as defined by the American

Plywood Association. Thickness shall be as shown on the drawings.

E. Rough Hardware - Furnish all items of rough hardware required to complete the work. Bolts, nuts, and washers shall be hot-dipped galvanized, conforming to ASTM A153.

PART 3 - EXECUTION

A. Framing

1. Wall

a. Cut framing square on bearings, closely fitted and accurately set level and plumb to required lines and levels. Secure rigidly in place.

b. Anchor nailers, blocking, etc., to concrete as indicated on the drawings. Make connections secure at all bearing points.

2. Roof Sheathing

a. Install sheathing perpendicular to run of roof rafters and nail in accordance with manufacturers' instructions.

b. As soon as sheathing is in place, cover all roof areas with “Titanium” felt (see

Section 07310).

3. All framing and/or blocking at roof penetrations or in contact with roofing or flashing, and all framing, sill plates, and/or blocking in contact with concrete shall be pressure treated.

SECTION 06200

FINISH CARPENTRY

A. This section includes finish carpentry.

B. Grading and Standards

1. Southern Pine shall conform to Federal Specification MM-L-751H and to the latest grading rules of the Southern Pine Association. All lumber shall be grade-certified by the Association.

2. All plywood shall conform to PS-1-74 and to the latest standards of the American

Plywood Association or Hardwood Plywood Institute. All plywood shall be certified by the appropriate grade trademark of the Association.

3. Millwork shall conform to the "Manual of Millwork" of the Woodwork Institute.

4. Kiln dried lumber shall not exceed 15% moisture content as determined by ASTM Test

Method D-2016; all other lumber shall not exceed 20%.

5. Pressure-treated lumber shall be ground contact, 0.21 pcf CA – B.

PART 2 - PRODUCTS

A. Ceilings shall be 5/8" T-1-11 Fir Premium Grade.

B. Interior and exterior wood trim shall be Clear Southern Yellow Pine, Premium Grade.

C. All wood stops and any wood in contact with concrete or masonry shall be pressure treated as described above.

PART 3 - EXECUTION

A. General Requirements

1. Finish millwork shall be made to exact dimensions, profiles, and details shown on drawings and on approved shop drawings. Finger joints will be permitted only for interior millwork to be painted. Except for saw-textured (resawn) members, sander wavers, rough or raised grain, rough edges, splinter, etc., shall be removed. Millwork shall be left in suitable condition for paint, stain, or natural finish. Interior trim 2" wide and over shall be backed out unless otherwise shown on the plans. All exposed edges shall be eased.

B. Interior millwork and finish shall not be installed until building is thoroughly dry.

C. Hammer or tool marks or marred surfaces and edges will not be acceptable on any exposed finished surfaces and, as evidence of inferior workmanship, shall be cause for rejection of such work.

D. All end splices exposed in finished members shall be accurately and neatly square butted.

Install members in lengths as long as possible.

E. All work shall be installed to details shown on the plans. Nails and screws shall be neatly set and all wood raised in the driving of nails and screws removed. Exterior corner joints shall be mitered. Interior corner joints may be coped. Casings at head of doors shall be mitered.

When molded members adjoin other molding or plain sections, the molded members shall be carefully and accurately scribed to the other members. All exposed edges shall be eased. Use galvanized finishing nails on all finishing work.

F. Prepare all woodwork installed hereunder by cleaning and sanding as required to receive finishes specified in Section "Painting". Rough sawn (resawn) surfaces shall not be sanded.

DIVISION 7 - THERMAL AND MOISTURE

07110 - Membrane Waterproofing 07210 - Building Insulation 07920 - Sealants and Caulking

SECTION 07110

MEMBRANE WATERPROOFING

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

PART 2 - PRODUCTS

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

PART 3 - EXECUTION

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

SECTION 07210

BUILDING INSULATION

A. This section covers all building insulation and related items.

B. All materials must be delivered in original unopened packages with manufacturer's name and contents legibly indicated.

C. Store all materials in a safe enclosed and protected area until ready to use.

PART 2 - PRODUCTS

A. Batt insulation shall be Johns-Manville Kraft-Faced fiberglass batt with following thicknesses:

1. Ceiling - 3-1/2" (R11)

2. Wood Walls - 3-1/2" (R11)

B. Concrete block insulation shall be loose fill granular insulation "Perlite" or equal.

PART 3 - EXECUTION

A. Install insulation where shown on drawings.

B. Installation of the insulation shall be in strict accordance with the manufacturer's printed instructions.

C. All block cells not receiving concrete grout shall be filled with "PERLITE" insulation.

D. Seal all electrical boxes recessed in masonry wall pror to filling the wall with loose insulation.

SECTION 07920

SEALANTS AND CAULKING

A. This item includes the furnishing and installation of all sealants and other related items necessary to complete the project.

B. Product Handling

1. Deliver sealants and related accessories to the job site in factory-sealed, unopened containers bearing manufacturer's name and product designation.

2. Store in unopened containers. Follow manufacturer's recommendations for storage temperatures and shelf life.

3. Follow manufacturer's recommendation for handling products containing toxic materials.

Keep flammable material away from heat, sparks, and open flame. Use recommended solvents and cleaning agents for cleaning tools, equipment, and skin.

A. All sealants, primers, and accessories shall be nonstaining to adjacent exposed materials.

1. Products having similar application and usage shall be of the same manufacturer and type.

2. Unless otherwise specified, color shall be selected from approved manufacturer's standard range.

3. Use gum-consistency compounds unless otherwise required by job conditions.

B. Sealants shall be Tremco "Mono," one-part acrylic terpolymer sealant.

C. Backer rod shall be polyethylene or polyurethane foam rod.

PART 3 - EXECUTION

A. Clean all joints, removing all foreign matter such as dirt, dust, moisture, frost, rust, mill scale, paint, lacquer, and protective coatings. All joints shall be free of loose particles.

1. Use no cleaning solvents which leave residue. Wipe joints free of solvent using clean, dry white cloths or white lintless paper. Do not permit solvent to air dry.

B. Apply materials in accordance with manufacturer's written instructions.

C. Prime wood surfaces with varnish diluted 50% with approved thinner.

D. Use masking tape when practical to control lap of materials onto adjacent surfaces or to facilitate tooling.