SOW.docx

Section C – Description/Specifications/Statement of Work

GENERAL SPECIFICATIONS

Big Smoky Hybrid Electrical System Upgrade and Building Foundation Improvements

3/28/2024

1.1 SCOPE OF CONTRACT

Base Bid: This work includes the installation of a prime rated, standalone generator backing up a DC solar array with battery storage and inversion to a 240/120 Vac distribution system.

1. The work includes:

Removal and salvage of an existing generator from the distribution system and an unused solar array (no electrical connections, salvaged for use at the Big Smoky Guard Station - South Site).

Site work for the providing and installing a new generator pad and new generator with associated feeders and controls.

Providing and installing pole mounted arrays with associated feeder.

Providing, installing and fully setting up a Flexware system with batteries and all other appurtenances for an operational system.

Option Item #1: This work consists of installing two permanent concrete foundations for an existing building (north building) with an outside measurement of 32 x 18 feet and another building (south building) with an outside measurement of 28 x 18 feet. The work will include raising, temporarily shifting, and then resetting each building onto newly constructed concrete foundations. Additional work includes hauling the excavated material from the crawl space to a designated site located approximately 3 miles from the work site, disassembling and then reconnecting the electrical, gas, water, and sewer utilities, and upon completion of all said work backfilling and dressing up around each structure.

Option Item #2: This work includes the installation of a prime rated, standalone generator backing up a DC solar array with battery storage and inversion to a 240/120 Vac distribution system.

2. The work includes:

Removal and disposal of an existing generator from the distribution system.

Site work for the providing and installing a new generator pad and new generator with associated feeders and controls.

Providing and installing pole mounted array using the salvaged modules of the existing array with associated feeder and future expansion capability.

Providing, installing and fully setting up a Flexware system with batteries and all other appurtenances for an operational system.

1.2 PROJECT LOCATION

1. The work site is located on the Big Smoky Work Center / Guard Station complex which resides on the Fairfield Ranger District. It is located approximately 20 miles north as a crow flies from Fairfield, Idaho. Refer to Drawings Cover Sheet for driving directions to the site.

1.3 SITE INFORMATION AND LIMITATIONS

1. The following site conditions are considered incidental to the contract and the Contractor will not be paid directly for any of the following items:

1. The site will likely be occupied during the construction period. Contractor’s operation shall not hinder use and occupancy by Forest Service employees. Contractor will be responsible for signing and limiting public and Forest Service access to the construction site.

2. There is existing electrical service for both sites from existing generators slated for replacement with this project. Contractor may use existing electrical services during construction if available. Contractor will be responsible for coordinating the installation of temporary power for the site as required to facilitate the completion of the required construction. Contractor shall provide connections and extensions of services as required for construction operations.

3. There is water service on site. Contractor shall provide connections and extensions of services as required for construction operations.

4. Contractor and workers will not have access to toilet facilities during construction. Contactor is to provide their own portable toilet facilities for the duration of construction.

5. All construction equipment shall be pressure washed before entering the site. The removal of mud and debris from treads, tracks and undercarriage, with emphasis on axles, frame, cross-members, motor mounts, and underneath steps, running boards, and front bumper/brushguard assemblies will be required. The purpose is to reduce or eliminate the transportation of noxious weeds, which is required by Federal and State regulations. The Contractor shall coordinate inspection of the equipment by the Forest Service prior to off-loading from the trailer.

6. Contractor shall provide all materials and labor necessary to protect streams, wet or dry, during construction activities. The Contractor shall submit a stream protection plan and receive approval from the CO, in writing, prior to beginning construction.

7. Construction Hours – Hours of operation shall be between 8:00 a.m. and 7:00 p.m. Monday through Friday.

1.4 TEMPORARY ACCESS

1. Parking: Use designated areas for construction personnel or as approved by the Contracting Officer for parking.

1.5 WASTE MANAGEMENT AND DISPOSAL

1. Processing waste material for salvage and recycling is encouraged.

The Contractor shall provide and maintain appropriate waste disposal containers or bins at the project site for the duration of the project construction. Verify with Contracting Office for placement of disposal containers and bins on the project site.

Waste material and debris shall be picked up and deposited in the waste disposal bins daily. Containers must be emptied on a weekly basis unless more frequent emptying is needed.

Burning or burying of construction waste material on site will not be permitted. Material shall be disposed of in accordance with the Waste Material Disposal specification.

Provide project signs as follows. Unauthorized signs are not permitted.

1. Temporary Signs: Provide other signs as indicated and as required informing public and individuals seeking entrance to Project.

2. Provide temporary, directional signs for construction personnel and visitors as required.

3. Maintain and touchup signs so they are legible at all times.

1.6 FIELD OFFICES, WORK CAMPS, STAGING AND STORAGE AREAS

1. Areas for staging operations and storage of materials shall be approved by the CO. The Contractor must request in writing for approval from the CO to stage trailers (work) on site. Overnight camping and housing on site will not be allowed.

1.7 INSPECTION OF WORKSITE

1. Contractor acknowledges they have taken the necessary steps to ascertain the nature and location of work and have investigated and satisfied themselves as to the general and local conditions that can affect the work or its cost. Any failure of the contractor to take the actions described and acknowledged in this paragraph will not relieve the Contractor from the responsibility of estimating properly the difficulty and cost of successfully performing the work, or for proceeding to successfully perform the work without additional expenses to the government.

1.8 START DATE

1. September 23, 2024

1.9 END DATE

1. November 15, 2024

1.10 SPECIFICATIONS

1. The following specifications are attached. Some sections in the schedule of items refer to other sections not listed and are subsidiary to or are included in payment for other pay items in this contract. Work shall occur in accordance with these specifications. These items are considered incidental and no additional compensation will be made.

Section 000050 – Building Foundations Section 011250 – Measurement And Payment Section 014100 – Quality Control Section 011900 – Mobilization Section 260000 – Common Work Results For Electrical Section 260519 – Low-Voltage Electrical Power Conductors And Cables Section 260526 – Grounding And Bonding For Electrical Systems Section 260533.13 – Conduits For Electrical Systems Section 260533.16 – Boxes And Covers For Electrical Systems Section 260553 – Identification For Electrical Systems Section 262726 – Wiring Devices

END OF SECTION C

March 2024

SECTION C - DESCRIPTION/SPECIFICATIONS/STATEMENT OF WORK 000001-1

USDA FOREST SERVICE, R-4

BIG SMOKY ELECTRICAL SYSTEM UPGRADE & BUILDING FOUNDATION IMPROVEMENTS

SECTION 000050 – BUILDING FOUNDATIONS

1. GENERAL

1.1 SUMMARY

This item consists of constructing two separate concrete foundations, the placement of the existing buildings on each new concrete foundation, and reinstallation of the utilities (gas, water, sewer, electrical) that will first need to be disconnected prior to temporarily moving each building. Any additional piping and wiring needed to reconnect the utilities shall be provided and installed by the Contractor in accordance with the Codes referenced in paragraph 1.4 below.

SUBMITTALS

Experience: The Contractor shall provide written documentation to the Contracting Officer detailing their experience in building moving.

Condition Documentation, Pre-move: Document and submit before moving building condition and photographs of any existing damage.

Condition Documentation, Post-move: Document building moving damage and repair condition and photographs. Include current photos of any previously existing damage and any change in condition.

MEASURMENT AND PAYMENT

0. The quantity to be measured shall be "Lump Sum Quantity" (LSQ) as shown on the Schedule of Items. Payment shall be at the contract unit price as shown on the Schedule of Items. The measurement for each item shall include all work items including the disconnect of all existing utilities (electrical, gas, water, and sewer) from each building, temporary relocation of each structure, the excavation for the foundation, the haul of the excavated material to the designated pit site, the complete installation of the concrete foundation per the contract drawings and specifications, the placement of the structures over the new foundations, reconnection of the utilities, backfill and compaction around each foundation, and any other miscellaneous work required to complete the intent of placing the existing buildings over new concrete foundations.

0. APPLICABLE CODES AND STANDARDS

2021 International Building Code 2021 International Plumbing Code 2018 International Mechanical Code 2018 International Fuel Gas Code 2020 National Electrical Code PRODUCTS - Not Applicable

EXECUTION

GENERAL

Work shall be completed in accordance with the contract drawings and specifications.

BUILDING REMOVAL / REINSTALLATION

Temporary moving each building and placing on the new foundations shall be done in a safe manner to avoid damaging each building.

The Contractor shall inspect and fully document each building’s condition, including notes, drawings and photographs before relocation is started and after this work is completed.

1. If the Contractor finds any portion of either building to be unsafe to move they shall notify the Contracting Officer prior to the building relocation effort.

Contractor will be solely responsible for the means and methods to perform the work.

Provide all necessary materials, labor, and equipment for relocating each building. Each building is to be moved intact and handled by a Contractor in the conventional manner. Workmen shall prepare the building for jacking, loading and transporting.

Supporting plywood, planks, or timbers may be attached to frame members to temporarily strengthen and assure a safe and stable move. These supports shall be done from the interior of the building to avoid the need to repair exterior nail holes or other penetrations.

2. Supports shall be removed after buildings are relocated.

Any damage to either building found after the relocation that was caused by the relocation work shall be repaired by the Contractor at no additional cost to the Government.

END OF SECTION 000050

March 2024

BUILDING FOUNDATIONS 000050-1

USDA FOREST SERVICE, R-4

BIG SMOKY ELECTRICAL SYSTEM UPGRADE & BUILDING FOUNDATION IMPROVEMENTS

SECTION 011250 – MEASUREMENT AND PAYMENT

1. GENERAL

1.1 SUMMARY

Measurement and payment for contract work will be made only for and under those pay items included in the Schedule of Items. All other work, labor, materials, equipment, and incidentals necessary to successfully complete the project will be considered as included in the payment for items shown. This section defines the method of measurements and basis of payment for work items listed in the Schedule of Items.

When more than one class, size, type, thickness, etc. is specified in the Schedule of Items for any pay item, suffixes will be added to the item number to differentiate between the pay items.

1.2 DETERMINATION OF QUANTITIES

0. The following measurements and calculations shall be used to determine contract quantities for payment.

1. For Structures, they shall be measured according to neat lines shown on the drawings or as altered by the CO, in writing, to fit field conditions.

1.3 UNITS OF MEASUREMENT

0. Payment shall be by units defined and determined according to U.S. Standard measure and by the following:

1. Lump Sum (LS): One complete unit.

1.4 METHOD OF MEASUREMENT

0. One of the following methods of measurement for determining final payment is designated on the Schedule of Items for each pay item:

1. LUMP SUM QUANTITIES (LSQ) - These quantities denote one complete unit of work as required by or described in the contract, including necessary materials, equipment, and labor to complete the job. They shall not be measured.

PRODUCTS (NOT APPLICABLE)

EXECUTION (NOT APPLICABLE)

END OF SECTION 011250

March 2024

USDA FOREST SERVICE, R-4

BIG SMOKY ELECTRICAL SYSTEM UPGRADE & BUILDING FOUNDATION IMPROVEMENTS

SECTION 014100 – QUALITY CONTROL

1. GENERAL

1.1 This work shall consist of providing quality control in conformance with the inspection, and product certification requirements of this contract to ensure compliance with the drawings and specifications. The Contractor shall provide all personnel, equipment, tests, and reports necessary to meet the requirements of the contract.

1.2 QUALITY CONTROL

The Contractor shall provide and maintain a quality control system that will ensure all services, supplies, and construction work required under this contract conforms to the contract requirements. The Contractor shall perform, or cause to be performed, the sampling, inspection, and testing required to substantiate that all services, supplies, and construction conform to the contract requirements.

1.3 SUBMITTALS

0. Contractor Quality Control Plan As-Built Drawings

1.4 MEASUREMENT AND PAYMENT

0. No separate payment will be made for the work included under this section; rather payment shall be considered to be included in the items of work listed in the Schedule of Items.

PRODUCTS (Not Applicable)

EXECUTION

3.1 CONTRACTOR QUALITY CONTROL PLAN

At the time of the preconstruction conference, the Contractor shall submit for approval a written Contractor Quality Control Plan.

1. At a minimum, the plan shall include the following:

A list of personnel responsible for quality control and assigned duties. Include each person's qualifications.

Methods of performing, documenting, and enforcing quality control of all work.

Methods of monitoring and controlling environmental pollution and contamination as required by all applicable regulations and laws.

3.2 AS-BUILT DRAWINGS

0. The Contractor shall maintain a set of the contract drawings depicting as-built conditions. These drawings shall be maintained in a current condition and shall be available for review. All variations from the original contract drawings shall be indicated in red on the drawings. Upon completion of the contract work, as-built drawings shall be submitted to the Contracting Officer.

END OF SECTION 014100

March 2024

QUALITY CONTROL 011900-1

USDA FOREST SERVICE, R4

BIG SMOKY ELECTRICAL SYSTEM UPGRADE & BUILDING FOUNDATION IMPROVEMENTS

SECTION 011900 – MOBILIZATION

1. GENERAL

SUMMARY

This item is intended to compensate the Contractor for operations including, but not limited to, those necessary for the movement of personnel, equipment, supplies, and incidentals to the project site; for payment of premiums for bonds and insurance for the project; and for any other work and operations which must be performed or costs that must be incurred incident to the initiation of meaningful work at the site and for which payment is not otherwise provided for under the contract.

MEASUREMENT AND PAYMENT

The measurement shall be lump sum for mobilization. Payment shall be as follows:

1. Bond premiums will be reimbursed after receipt of the evidence of payment.

2. 50% of the lump sum, not to exceed 5% of the original contract amount, will be paid following completion of 5% of the original contract amount not including mobilization and bond premiums.

3. Payment of the remaining portion of the lump sum, up to 10% of the original contract amount, will be paid following completion of 10% of the original contract amount not including mobilization and bond premiums.

4. Any portion of the lump sum in excess of 10% of the original contract amount will be paid after final acceptance.

5. Progress payments for mobilization and preparatory work shall be subject to retainage.

PRODUCTS (NOT USED)

EXECUTION (NOT USED)

END OF SECTION 011900

March 2024

MOBILIZATION 011900-1

USDA FOREST SERVICE, R-4

BIG SMOKY ELECTRICAL SYSTEM UPGRADE & BUILDING FOUNDATION IMPROVEMENTS

SECTION 033000 – CAST-IN-PLACE CONCRETE

1. GENERAL

1.1 SUMMARY

This Section specifies cast-in place concrete, including formwork, reinforcement, concrete materials, mixture design, placement procedures, and finishes.

1.2 DEFINITIONS

0. Cementitious Materials: Portland cement alone or in combination with one or more of the following: blended hydraulic cement, fly ash and other pozzolans, ground granulated blast-furnace slag, and silica fume; subject to compliance with requirements.

1.3 SUBMITTALS

0. Product Data: For each type of product indicated.

Design Mixtures: For each concrete mixture. Indicate amounts of mixing water to be withheld for later addition at Project site.

Steel Reinforcement Shop Drawings when project design requires special consideration.

Field quality-control test reports.

1.4 MEASUREMENT AND PAYMENT

0. There will be no separate measurement or payment for work in this section. Payment will be included at the contract unit price for items shown on the Schedule of Items.

PRODUCTS

2.1 FORM-FACING MATERIALS

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

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

2. Exterior-grade plywood panels, suitable for concrete forms, complying with DOC PS 1, and as follows:

Structural 1, B-B or better; mill oiled and edge sealed.

B-B (Concrete Form), Class 1 or better; mill oiled and edge sealed.

Rough-Formed Finished Concrete: Plywood, lumber, metal, or another approved material. Provide lumber dressed on at least two edges and one side for tight fit.

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

Form Ties: Factory-fabricated, removable or snap-off metal or glass-fiber-reinforced plastic form ties designed to resist lateral pressure of fresh concrete on forms and to prevent spalling of concrete on removal.

3. Furnish units that will leave no corrodible metal closer than 1 inch to the plane of exposed concrete surface.

4. Furnish ties with integral water-barrier plates to walls indicated to receive dampproofing or waterproofing.

2.2 STEEL REINFORCEMENT

0. Reinforcing Bars: ASTM A 615/A 615M, Grade 60, deformed.

Plain-Steel Wire: ASTM A 82, as drawn.

Deformed-Steel Wire: ASTM A 496.

2.3 REINFORCEMENT ACCESSORIES

0. Joint Dowel Bars: ASTM A 615/A 615M, Grade 60, plain-steel bars, cut bars true to length with ends square and free of burrs.

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

1. For concrete surfaces exposed to view where legs of wire bar supports contact forms, use CRSI Class 1 plastic-protected steel wire or CRSI Class 2 stainless-steel bar supports.

2.4 CONCRETE MATERIALS

0. Cementitious Material: Use the following cementitious materials, of the same type, brand, and source, throughout Project:

1. Portland Cement: ASTM C 150, Type II.

Normal-Weight Aggregates: ASTM C 33, graded, from a single source.

2. Maximum Coarse-Aggregate Size: 1 inch nominal.

3. Fine Aggregate: Free of materials with deleterious reactivity to alkali in cement.

Water: ASTM C 94/C 94M and potable.

Fly ash, ground iron blast-furnace slag, or silica fume may partially replace cement in any mix as follows:

4. Fly Ash:

Class F – Not more than 20 percent of the minimum mass of portland cement may be replaced with class F fly ash.

Class C – Not more than 25 percent of the minimum mass of portland cement may be replaced with class C fly ash.

5. Ground Iron Blast-Furnace Slag: Not more than 25 percent of the minimum mass of portland cement may be replaced with ground iron blast-furnace slag.

6. Silica Fume (microsilica): Not more than 10 percent of the minimum mass of portland cement may be replaced with silica fume.

7. Additionally, fly ash, slag, and silica fume will constitute no more than 50 percent of the total replacement weight.

2.5 ADMIXTURES

0. Air-Entraining Admixture: ASTM C 260.

Chemical Admixtures: Provide admixtures certified by manufacturer to be compatible with other admixtures and that will not contribute water-soluble chloride ions exceeding those permitted in hardened concrete. Do not use calcium chloride or admixtures containing calcium chloride.

1. Retarding Admixture: ASTM C 494/C 494M, Type B.

Synthetic Fiber: Monofilament or fibrillated polypropylene fibers engineered and designed for use in concrete pavement, complying with ASTM C 1116, Type III, 1/2 to 1-1/2 inches long.

2.6 VAPOR RETARDERS

0. Plastic Vapor Retarder: ASTM E 1745, Class C, or polyethylene sheet, ASTM D 4397, not less than 10 mils thick. Include manufacturer's recommended adhesive or pressure-sensitive joint tape.

Fine-Graded Granular Material: Clean mixture of crushed stone, crushed gravel, and manufactured or natural sand; ASTM D 448, Size 10, with 100 percent passing a 3/8-inch sieve, 10 to 30 percent passing a No. 100 sieve, and at least 5 percent passing No. 200 sieve; complying with deleterious substance limits of ASTM C 33 for fine aggregates.

2.7 CURING MATERIALS

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

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

Water: Potable.

Clear, Waterborne, Membrane-Forming Curing Compound: ASTM C 309, Type 1, Class B, dissipating or nondissipating. Liquid Membrane-Forming Compounds. Material shall be certified by curing compound manufacturer to not interfere with bonding of floor covering.

2.8 RELATED MATERIALS

0. Expansion- and Isolation-Joint-Filler Strips: ASTM D 1751, asphalt-saturated cellulosic fiber or ASTM D 1752, cork or self-expanding cork.

Semirigid Joint Filler: Two-component, semirigid, 100 percent solids, epoxy resin with a Type A shore durometer hardness of 80 per ASTM D 2240.

Bonding Agent: ASTM C 1059, Type II, non-redispersible, acrylic emulsion or styrene butadiene.

Epoxy Bonding Adhesive: ASTM C 881, two-component epoxy resin, capable of humid curing and bonding to damp surfaces, of class suitable for application temperature and of grade to suit requirements, and as follows:

1. Types IV and V, load bearing, for bonding hardened or freshly mixed concrete to hardened concrete.

2.9 REPAIR MATERIALS

0. Repair Underlayment: Cement-based, polymer-modified, self-leveling product that can be applied in thicknesses from 1/8 inch and that can be feathered at edges to match adjacent floor elevations.

1. Cement Binder: ASTM C 150, portland cement or hydraulic or blended hydraulic cement as defined in ASTM C 219.

2. Primer: Product of underlayment manufacturer recommended for substrate, conditions, and application.

3. Aggregate: Well-graded, washed gravel, 1/8 to 1/4 inch or coarse sand as recommended by underlayment manufacturer.

4. Compressive Strength: Not less than 4100 psi at 28 days when tested according to ASTM C 109/C 109M.

Repair Overlayment: Cement-based, polymer-modified, self-leveling product that can be applied in thicknesses from 1/8 inch and that can be feathered at edges to match adjacent floor elevations.

5. Cement Binder: ASTM C 150, portland cement or hydraulic or blended hydraulic cement as defined in ASTM C 219.

6. Primer: Product of topping manufacturer recommended for substrate, conditions, and application.

7. Aggregate: Well-graded, washed gravel, 1/8 to 1/4 inch or coarse sand as recommended by topping manufacturer.

8. Compressive Strength: Not less than 5000 psi at 28 days when tested according to ASTM C 109/C 109M.

2.10 CONCRETE MIXTURES, GENERAL

0. Prepare design mixtures for each type and strength of concrete, proportioned on the basis of laboratory trial mixture or field test data, or both, according to ACI 301.

1. Use a qualified independent testing agency for preparing and reporting proposed mixture designs based on laboratory trial mixtures.

Limit water-soluble, chloride-ion content in hardened concrete to 0.06 percent by weight of cement.

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

2.11 CONCRETE MIXTURES FOR BUILDING ELEMENTS

0. Footings & Foundation Walls: Proportion normal-weight concrete mixture as follows:

1. Minimum Compressive Strength: 3500 psi at 28 days.

2. Maximum Water-Cementitious Materials Ratio: 0.50.

3. Slump Limit: 4 inches, plus or minus 1 inch.

4. Air Content: 5 percent, plus or minus 1 percent at point of delivery for 1-inch nominal maximum aggregate size.

Slabs-on-Grade: Proportion normal-weight concrete mixture as follows:

5. Minimum Compressive Strength: 3500 psi at 28 days.

6. Minimum Cementitious Materials Content: 540 lb/cu. yd.

7. Slump Limit: 4 inches, plus or minus 1 inch.

8. Air Content: 5 percent, plus or minus 1 percent at point of delivery for 1-inch nominal maximum aggregate size.

9. Air Content: Do not allow air content of troweled finished floors to exceed 3 percent.

10. Synthetic Fiber: Uniformly disperse in concrete mixture at manufacturer's recommended rate, but not less than 1.5 lb/cu. yd..

2.12 FABRICATING REINFORCEMENT

0. Fabricate steel reinforcement according to CRSI's "Manual of Standard Practice."

2.13 CONCRETE MIXING

0. Ready-Mixed Concrete: Measure, batch, mix, and deliver concrete according to ASTM C 94/C 94M and ASTM C 1116, and furnish batch ticket information.

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

EXECUTION

3.1 FORMWORK

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

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

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

2. Class A, 1/8 inch for smooth-formed finished surfaces.

3. Class B, 1/4 inch for rough-formed finished surfaces.

Construct forms tight enough to prevent loss of concrete mortar.

Fabricate forms for easy removal without hammering or prying against concrete surfaces. Provide crush or wrecking plates where stripping may damage cast concrete surfaces. Provide top forms for inclined surfaces steeper than 1.5 horizontal to 1 vertical.

4. Install keyways, reglets, recesses, and the like, for easy removal.

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

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

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

Chamfer or round exterior corners and edges of permanently exposed concrete.

Form openings, chases, offsets, sinkages, keyways, reglets, blocking, screeds, and bulkheads required in the Work. Determine sizes and locations from trades providing such items.

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

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

Coat contact surfaces of forms with form-release agent, according to manufacturer's written instructions, before placing reinforcement.

3.2 EMBEDDED ITEMS

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

3.3 REMOVING AND REUSING FORMS

0. General: Formwork for sides of beams, walls, columns, and similar parts of the Work that does not support weight of concrete may be removed after cumulatively curing at not less than 50 deg F for 48 hours after placing concrete, if concrete is hard enough to not be damaged by form-removal operations and curing and protection operations are maintained.

1. Leave formwork for beam soffits, joists, slabs, and other structural elements that supports weight of concrete in place until concrete has achieved at least 70 percent of its 28-day design compressive strength.

2. Remove forms only if shores have been arranged to permit removal of forms without loosening or disturbing shores.

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

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

3.4 VAPOR RETARDERS

0. Plastic Vapor Retarders: Place, protect, and repair vapor retarders according to ASTM E 1643 and manufacturer's written instructions.

1. Lap joints 6 inches and seal with manufacturer's recommended tape.

3.5 STEEL REINFORCEMENT

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

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

Clean reinforcement of loose rust and mill scale, earth, ice, and other foreign materials that would reduce bond to concrete.

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

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

3.3 JOINTS

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

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

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

2. Foundation Walls: Foundation walls per each building shall be poured with no construction joints.

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

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

4. Grooved Joints: Form contraction joints after initial floating by grooving and finishing each edge of joint to a radius of 1/8 inch. Repeat grooving of contraction joints after applying surface finishes. Eliminate groover tool marks on concrete surfaces.

5. Sawed Joints: Form contraction joints with power saws equipped with shatterproof abrasive or diamond-rimmed blades. Cut 1/8-inch wide joints into concrete when cutting action will not tear, abrade, or otherwise damage surface and before concrete develops random contraction cracks. No Sawed Joints are allowed on concrete exposed to freezing.

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

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

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

3.4 CONCRETE PLACEMENT

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

Do not add water to concrete during delivery, at Project site, or during placement unless approved by the Contracting Officer and in no case shall the amount of water be more than the amount allowed in the design mixture. No water may be added after test sampling.

Deposit concrete continuously in one layer or in horizontal layers of such thickness that no new concrete will be placed on concrete that has hardened enough to cause seams or planes of weakness. If a section cannot be placed continuously, provide construction joints as indicated. Deposit concrete to avoid segregation.

1. Deposit concrete in horizontal layers of depth to not exceed formwork design pressures and in a manner to avoid inclined construction joints.

2. Consolidate placed concrete with mechanical vibrating equipment according to ACI 301.

3. Do not use vibrators to transport concrete inside forms. Insert and withdraw vibrators vertically at uniformly spaced locations to rapidly penetrate placed layer and at least 6 inches into preceding layer. Do not insert vibrators into lower layers of concrete that have begun to lose plasticity. At each insertion, limit duration of vibration to time necessary to consolidate concrete and complete embedment of reinforcement and other embedded items without causing mixture constituents to segregate.

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

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

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

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

7. Slope surfaces uniformly to drains where required.

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

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

9. When average high and low temperature is expected to fall below 40 deg F for three successive days, maintain delivered concrete mixture temperature within the temperature range required by ACI 301.

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

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

Hot-Weather Placement: Comply with ACI 301 and as follows:

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

13. Fog-spray forms, steel reinforcement, and subgrade just before placing concrete. Keep subgrade uniformly moist without standing water, soft spots, or dry areas.

3.5 FINISHING FORMED SURFACES

0. As-cast concrete texture imparted by form-facing material, arranged in an orderly and symmetrical manner with a minimum of seams: Repair and patch tie holes and defects. Remove fins and other projections that exceed specified limits on formed-surface irregularities.

Rubbed Finish: Apply the following to smooth-formed finished as-cast concrete where indicated:

1. Grout-Cleaned Finish: Wet concrete surfaces and apply grout of a consistency of thick paint to coat surfaces and fill small holes. Mix one part portland cement to one and one-half parts fine sand with a 1:1 mixture of bonding admixture and water. Add white portland cement in amounts determined by trial patches so color of dry grout will match adjacent surfaces. Scrub grout into voids and remove excess grout. When grout whitens, rub surface with clean burlap and keep surface damp by fog spray for at least 36 hours.

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

3.6 FINISHING FLOORS AND SLABS

0. General: Comply with ACI 302.1R recommendations for screeding, restraightening, and finishing operations for concrete surfaces. Do not wet concrete surfaces.

Float Finish: Consolidate surface with power-driven floats or by hand floating if area is small or inaccessible to power driven floats. Restraighten, cut down high spots, and fill low spots. Repeat float passes and restraightening until surface is left with a uniform, smooth, granular texture.

1. Apply float finish to surfaces to receive trowel finish and to be covered with fluid-applied or sheet waterproofing.

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

2. Apply a trowel finish to surfaces to be covered with resilient flooring, carpet, ceramic or quarry tile set over a cleavage membrane.

3. Finish and measure surface so gap at any point between concrete surface and an unleveled, freestanding, 10-foot-long straightedge resting on 2 high spots and placed anywhere on the surface does not exceed 1/8 inch.

Trowel and Fine-Broom Finish: Apply a first trowel finish to surfaces indicated. While concrete is still plastic, slightly scarify surface with a fine broom.

4. Comply with flatness and levelness tolerances for trowel finished floor surfaces.

Broom Finish: Apply a broom finish to exterior concrete platforms, steps, and ramps, and elsewhere as indicated.

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

3.7 CONCRETE PROTECTING AND CURING

0. General: Protect freshly placed concrete from premature drying and excessive cold or hot temperatures. Comply with ACI 306.1 for cold-weather protection and ACI 301 for hot-weather protection during curing.

Evaporation Retarder: Apply evaporation retarder to unformed concrete surfaces if hot, dry, or windy conditions cause moisture loss approaching 0.2 lb/sq. ft. per hour in accordance with ACI305R before and during finishing operations. Apply according to manufacturer's written instructions after placing, screeding, and bull floating or darbying concrete, but before float finishing.

Formed Surfaces: Cure formed concrete surfaces, including underside of beams, supported slabs, and other similar surfaces. If forms remain during curing period, moist cure after loosening forms. If removing forms before end of curing period, continue curing for the remainder of the curing period.

Unformed Surfaces: Begin curing immediately after finishing concrete. Cure unformed surfaces, including floors and slabs, concrete floor toppings, and other surfaces.

Cure concrete according to ACI 308.1, by one or a combination of the following methods:

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

Water.

Continuous water-fog spray.

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

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

Moisture cure or use moisture-retaining covers to cure concrete surfaces to receive floor coverings.

Moisture cure or use moisture-retaining covers to cure concrete surfaces to receive penetrating liquid floor treatments.

Cure concrete surfaces to receive floor coverings with either a moisture-retaining cover or a curing compound that the manufacturer certifies will not interfere with bonding of floor covering used on Project.

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

After curing period has elapsed, remove curing compound without damaging concrete surfaces by method recommended by curing compound manufacturer unless manufacturer certifies curing compound will not interfere with bonding of floor covering used on Project.

3.8 CONCRETE SURFACE REPAIRS

0. Defective Concrete: Repair and patch defective areas when approved by Contracting Officer. Remove and replace concrete that cannot be repaired and patched to Contracting Officer's approval.

Patching Mortar: Mix dry-pack patching mortar, consisting of one part portland cement to two and one-half parts fine aggregate passing a No. 16 sieve, using only enough water for handling and placing.

Repairing Formed Surfaces: Surface defects include color and texture irregularities, cracks, spalls, air bubbles, honeycombs, rock pockets, fins and other projections on the surface, and stains and other discolorations that cannot be removed by cleaning.

1. Immediately after form removal, cut out honeycombs, rock pockets, and voids more than 1/2 inch in any dimension in solid concrete, but not less than 1 inch in depth. Make edges of cuts perpendicular to concrete surface. Clean, dampen with water, and brush-coat holes and voids with bonding agent. Fill and compact with patching mortar before bonding agent has dried. Fill form-tie voids with patching mortar or cone plugs secured in place with bonding agent.

2. Repair defects on surfaces exposed to view by blending white portland cement and standard portland cement so that, when dry, patching mortar will match surrounding color. Patch a test area at inconspicuous locations to verify mixture and color match before proceeding with patching. Compact mortar in place and strike off slightly higher than surrounding surface.

3. Repair defects on concealed formed surfaces that affect concrete's durability and structural performance as determined by Contracting Officer.

Repairing Unformed Surfaces: Test unformed surfaces, such as floors and slabs, for finish and verify surface tolerances specified for each surface. Correct low and high areas. Test surfaces sloped to drain for trueness of slope and smoothness; use a sloped template.

4. Repair finished surfaces containing defects. Surface defects include spalls, popouts, honeycombs, rock pockets, crazing and cracks in excess of 0.01 inch wide or that penetrate to reinforcement or completely through unreinforced sections regardless of width, and other objectionable conditions.

5. After concrete has cured at least 14 days, correct high areas by grinding.

6. Correct localized low areas during or immediately after completing surface finishing operations by cutting out low areas and replacing with patching mortar. Finish repaired areas to blend into adjacent concrete.

7. Correct other low areas scheduled to receive floor coverings with a repair underlayment. Prepare, mix, and apply repair underlayment and primer according to manufacturer's written instructions to produce a smooth, uniform, plane, and level surface. Feather edges to match adjacent floor elevations.

8. Correct other low areas scheduled to remain exposed with a repair topping. Cut out low areas to ensure a minimum repair topping depth of 1/4 inch to match adjacent floor elevations. Prepare, mix, and apply repair topping and primer according to manufacturer's written instructions to produce a smooth, uniform, plane, and level surface.

9. Repair defective areas, except random cracks and single holes 1 inch or less in diameter, by cutting out and replacing with fresh concrete. Remove defective areas with clean, square cuts and expose steel reinforcement with at least a 3/4-inch clearance all around. Dampen concrete surfaces in contact with patching concrete and apply bonding agent. Mix patching concrete of same materials and mixture as original concrete except without coarse aggregate. Place, compact, and finish to blend with adjacent finished concrete. Cure in same manner as adjacent concrete.

10. Repair random cracks and single holes 1 inch or less in diameter with patching mortar. Groove top of cracks and cut out holes to sound concrete and clean off dust, dirt, and loose particles. Dampen cleaned concrete surfaces and apply bonding agent. Place patching mortar before bonding agent has dried. Compact patching mortar and finish to match adjacent concrete. Keep patched area continuously moist for at least 72 hours.

Perform structural repairs of concrete, subject to Contracting Officer's approval, using epoxy adhesive and patching mortar.

Repair materials and installation not specified above may be used, subject to Contracting Officer's approval.

3.9 FIELD QUALITY CONTROL

0. Testing and Inspecting: Contractor will engage a qualified independent testing and inspecting agency to perform field tests and inspections and prepare test reports.

Concrete Tests: Testing of composite samples of fresh concrete obtained according to ASTM C 172 shall be performed according to the following requirements:

1. Testing Frequency: A composite sample set consists of one slump test, one air entrainment test, and one temperature test per truck.

2. Slump: ASTM C 143/C 143M; one test at point of placement for each composite sample. Perform additional tests when concrete consistency appears to change or water is added.

3. Air Content: ASTM C 231, pressure method, for normal-weight concrete; one test for each composite sample.

4. Concrete Temperature: ASTM C 1064/C 1064M; one test for each composite sample.

5. Compression Test Specimens: ASTM C 31/C 31M. Cast and laboratory cure one set of three standard cylinder specimens for each composite sample.

Compressive-Strength Tests: ASTM C 39/C 39M; test one of three laboratory-cured specimens at 7 days and one specimen at 28 days. If either previous tests fail, test third specimen at 28 days.

Strength of each batch delivered will be satisfactory if 28-day compressive-strength tests equals or exceeds specified compressive strength.

Test results shall be reported in writing to Contracting Officer and Contractor within 48 hours of testing. Reports shall contain project identification name and number, date of concrete placement, name of concrete testing and inspecting agency, location of concrete batch in work, design compressive strength at 28 days, concrete mixture proportions and materials, compressive breaking strength, and type of break for both 7- and 28-day tests.

Additional testing and inspecting, at Contractor's expense, will be performed to determine compliance of replaced or additional work with specified requirements.

Correct deficiencies in the work that test reports and inspections indicate does not comply with the Contract Documents.

END OF SECTION 033000

March 2024

CAST IN PLACE CONCRETE 033000-1

USDA FOREST SERVICE, R4

BIG SMOKY ELECTRICAL SYSTEM UPGRADE & BUILDING FOUNDATION IMPROVEMENTS

SECTION 260000 – COMMON WORK RESULTS FOR ELECTRICAL

1. GENERAL

SUMMARY

This Section specifies supplemental requirements generally applicable to the Work specified in Division 26. This Section is also referenced by related Work specified in other Divisions.

Section Includes:

1. Electrical Submittals

2. Measurement and Payment

3. Electrical equipment coordination and installation.

4. Grout.

5. Common electrical installation requirements.

6. Hangers and supports.

REFERENCES

Abbreviations and Acronyms for Electrical Terms and Units of Measure:

7. A: Ampere, unit of electrical current.

8. AC or ac: Alternating current.

9. AIC: Ampere interrupting capacity.

10.…