Combined Specs 7-17-19.pdf

07/19 GENERAL REQUIREMENTS

CDT CABIN PAD 01010-1

SECTION 01010 – GENERAL REQUIREMENTS

PART 1 - GENERAL

1.1 SUMMARY

A. Description of Work: Furnishing labor, equipment, supplies, and materials to construct a new 20’ X 20’ concrete pad and to complete all associated work. Work will include grading of the site, placement of a leveling course, and construction of a reinforced concrete pad.

B. Location: Work under this Contract is located in Lemhi County, Idaho. The work locations are shown on the drawings.

C. Time: Work under this contract will be limited to 30 Calendar Days.

1.2 REFERENCES

A. Referenced Specifications and Standards with Abbreviations and Acronyms: Wherever the following acronyms are used in these specifications or on the drawings, they are to be construed the same as the respective expressions represented. Copies of the referenced specifications and standards referred to may be procured by the Contractor from the following:

ACI American Concrete Institute

P.O. Box 19150 Detroit, MI 48219

ACI 117 Tolerances for Concrete Construction and Materials ACI 301-89 Structural Concrete for Buildings ACI 304R-89 Guide for Measuring, Mixing, Transporting, and Placing

Concrete ACI 305R-91 Hot Weather Concreting ACI 306R-88 Cold Weather Concreting

ASTM American Society for Testing and Materials

100 Barr Harbor Dr.

West Conshohocken PA 19428-2959

ASTM A 325 Structural Bolts ASTM A 615/A 615M Deformed and Plain Billet Steel Bars for Concrete

Reinforcement ASTM C 33-93 Concrete Aggregate ASTM C 94-94M Ready-Mixed Concrete ASTM C 150-95 Portland Cement ASTM C 260-95 Air-Entraining Admixtures for Concrete ASTM C 309-95 Liquid Membrane-Forming Compounds for Curing

Concrete ASTM C 494-92 Chemical Admixtures for Concrete ASTM D698 Standard Test Methods for Laboratory Compaction

Characteristics of Soil Using Standard Effort

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CRSI Concrete Reinforcing Steel Institute 933 North Plum Grove Road Schaumburg, IL 60173

CRSI DA 1-92 Handbook CRSI DA 1C Practical Design of Reinforced Concrete CRSI DE 1 Reinforcing Bar Detailing CRSI T 1 Reinforcing Bar Testing CRSI DA 2-90 Reinforcement: Anchorages, Lap Splices and Connectors

1.3 QUALITY ASSURANCE

A. Codes and Standards: The work shall comply with codes and standards applicable to each type of work and as listed in the individual sections of these specifications. This Contract incorporates materials, applications, and tests by reference, with the same force and effect as if they were given in full text.

B. Conflict: Where a conflict occurs between reference documents and project specifications, the project specifications shall govern.

1.4 SUBMITTALS

A. General: Submittals will include, but not be limited to;

1. Aggregates (See Section 02300),

2. Mix Designs for Concrete (See Section 03300),

3. Reinforcing Materials (See Section 03300), B. Submittals shall be submitted to the Contracting Officer’s Representative for approval prior to the start of work.

1.5 DELIVERY, STORAGE, AND HANDLING

A. Delivery: Protect products incorporated into the work from damage while in transit to the site.

Products must be delivered in original, unopened containers with manufacturer's name, brand designation, and contents legibly indicated. The containers shall bear the referenced specification number, type and class as applicable.

B. Storage: Provide temporary storage facilities for products. Storage shall comply with the manufacturer's instructions. The storage area shall permit access for inspection and handling.

C. Handling: Load and unload products in such a manner that protects them from damage.

1.6 PROJECT AND SITE CONDITIONS

A. Access to the Work: The work area is available to the Contractor by gravel roads.

B. Environmental Considerations: Fuel or oil spills occurring during the work of this project shall be excavated to a depth of 12 inches beyond contaminated material and removed from the work

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location. Prescribed measures to prevent water pollution to nearby water resources shall be strictly observed.

1.7 SEQUENCING AND SCHEDULING

A. Requirements: Operations necessary to complete the work, including coordination with other crafts relative to the Contractor's requirements are the Contractor's responsibility. Work shall be scheduled in such a manner as to avoid delays in overall construction and permit proper installation of work.

PART 2 - PRODUCTS

There are no applicable requirements.

PART 3 - EXECUTION

3.1 PROJECT MEETINGS

A. Pre-Work Conference: Will be held prior to the start of the work. The Contractor will be notified in advance of the meeting time, date, and place. The purpose will be to review required work, project drawings, specifications, construction schedules, payroll, and payments, and administrative provisions of the Contract.

1. Be prepared to summarize and explain procedures planned for the project and present the submittals requested in the specifications.

B. Progress Meetings: May be requested by either the Contracting Officer or the Contractor. The request shall state who should attend and include an agenda.

C. Final Inspection: Notify the Contracting Officer in writing at least five working days before the completion date, so the Government can schedule final inspection.

3.2 PREPARATION

A. Work Layout: The Government will set stakes to give the Contractor measurements, lines and grades necessary for the work executed under the Contract.

B. Work Limits and Control Points: The Contracting Officer will arrange for staking.

3.3 DISPOSAL OF DEBRIS

A. Requirements: Items or debris that is not designated as salvage by the Government, shall become the property of the Contractor. All disposal of concrete and associated material from the demolition of the pads will be the responsibility of the Contractor. The disposal of materials off the site in a legal manner and for payment of any fees required is the responsibility of the Contractor. When hazardous materials are encountered during demolition operations, comply with applicable federal, state, and local regulations, laws, and ordinances concerning removal, handling, and protection against exposure or environmental pollution. Burning of removed materials is not permitted on the work site.

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PART 4 - MEASUREMENT AND PAYMENT

A. The intent of these paragraphs are to explain, in general, what is and what is not included in a pay item, and the limits or cut-off points where one pay item ends and another begins.

B. If no pay item exists for a portion of the work, include the costs in a related pay item.

C. Item 01010 – 01 Mobilization: This will not be measured for payment, but will be paid for as Lump Sum.

D. Item 01010 – 02 Grading: Grading and Placement of Leveling Course Material. This item includes all work described in Section 02300. It will be measured for payment, and will be paid for as Lump Sum.

E. Item 01010 – 03 Concrete: This item includes all work described in Section 03300. It will be measured for payment, and will be paid for as Cubic Yards.

4.2 BASIS OF PAYMENT

A. Payment: Payment will be made at the Contract price, as indicated in the Bid Schedule, and will include full compensation for the work described in the Contract.

END OF SECTION 01010

07/19 EARTHWORK

CDT CABIN PAD 02300-1

SECTION 02300 - EARTHWORK

PART 1 - GENERAL

1.1 SUMMARY

A. Section Includes:

1. Preparing subgrades for slabs-on-grade.

2. Excavating and backfilling for buildings and structures.

3. Subbase course and base course for concrete pavements.

1.2 DEFINITIONS

A. Backfill: Soil material used to fill an excavation.

B. Base Course: Aggregate layer placed between the subbase course and concrete.

C. Borrow Soil: Satisfactory soil imported from off-site for use as fill or backfill.

D. Excavation: Removal of material encountered above subgrade elevations and to lines and dimensions indicated.

1. Authorized Additional Excavation: Excavation below subgrade elevations or beyond indicated lines and dimensions as directed by Contracting Officer. Authorized additional excavation and replacement material will be paid for according to Contract provisions for changes in the Work.

2. Unauthorized Excavation: Excavation below subgrade elevations or beyond indicated lines and dimensions without direction by Contracting Officer. Unauthorized excavation, as well as remedial work directed by Contracting Officer, shall be without additional compensation.

E. Fill: Soil materials used to raise existing grades.

F. Structures: Buildings, footings, foundations, retaining walls, slabs, tanks, curbs, mechanical and electrical appurtenances, or other man-made stationary features constructed above or below the ground surface.

G. Subbase Course: Aggregate layer placed between the subgrade and base course for concrete pavement.

H. Subgrade: Uppermost surface of an excavation or the top surface of a fill or backfill immediately below subbase, drainage fill, drainage course, or topsoil materials.

I. Utilities: On-site underground pipes, conduits, ducts, and cables, as well as underground services within buildings.

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1.3 SUBMITTALS

A. There are no applicable requirements.

1.4 QUALITY ASSURANCE

A. Pre-excavation Conference: Conduct conference at Project site.

1.5 PROJECT CONDITIONS

A. Utility Locator Service: Notify utility locator service for area where Project is located before beginning earth moving operations.

PART 2 - MATERIALS

A. Base Course – Sieve Design B as shown below.

B. Base course material shall conform to one of the following gradations as specified:

BASE COURSE GRADATIONS

(Percent passing by weight) Sieve

Design A B C C-1 D D-1 E E-1

4 100 2 85-100 100

1-1/2 100 1 100 70-100 100 100

3/4 60-90 100 70-100 100 3/8 45-75 50-80 100

No. 4 30-70 30-70 40-75 30-60 45-80 35-65 45-80 No. 8 22-52 20-50 32-80

No. 10 25-55 30-65 No. 40 8-30 8-30

No. 200 0-10 3-10 4-10 0-6 4-12 0-6 0-6 0-6

C. Geotextile - Shall comply with a Type II Geotextile as specified by the Idaho Department of Transportation Section 718.07 in the most current version of the Standard Specifications for Highway Construction.

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PART 3 - EXECUTION

3.1 PREPARATION

A. Protect structures, utilities, sidewalks, pavements, and other facilities from damage caused by settlement, lateral movement, undermining, washout, and other hazards created by earth moving operations.

B. Protect subgrades and foundation soils from freezing temperatures and frost. Remove temporary protection before placing subsequent materials.

3.2 EXCAVATION, GENERAL

A. Unclassified Excavation: Excavate to subgrade elevations regardless of the character of surface and subsurface conditions encountered. Unclassified excavated materials may include rock, soil materials, and obstructions. No changes in the Contract Sum or the Contract Time will be authorized for rock excavation or removal of obstructions.

1. If excavated materials intended for fill and backfill include unsatisfactory soil materials and rock, replace with satisfactory soil materials.

3.3 EXCAVATION FOR STRUCTURES

A. Excavate to indicated elevations and dimensions within a tolerance of plus or minus 1 inch. If applicable, extend excavations a sufficient distance from structures for placing and removing concrete formwork, for installing services and other construction, and for inspections.

3.4 SUBGRADE INSPECTION

A. Proof-roll subgrade below the building slabs and pavements with a vibratory plate compactor or jumping jack to identify soft pockets and areas of excess yielding. Do not proof-roll wet or saturated subgrades.

B. Reconstruct subgrades damaged by freezing temperatures, frost, rain, accumulated water, or construction activities, as directed by Contracting Officer, without additional compensation.

3.5 UNAUTHORIZED EXCAVATION

A. Fill unauthorized excavation under foundations or wall footings by extending bottom elevation of concrete foundation or footing to excavation bottom, without altering top elevation. Lean concrete fill, with 28-day compressive strength of 2500 psi, may be used when approved by Contracting Officer.

1. Fill unauthorized excavations under other construction, pipe, or conduit as directed by Contracting Officer.

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2. Over excavation will not be permitted on the north side of the pads due to utility lines.

3.6 STORAGE OF SOIL MATERIALS

A. Stockpile borrow soil materials and excavated satisfactory soil materials without intermixing.

Place, grade, and shape stockpiles to drain surface water. Cover to prevent windblown dust.

1. Stockpile soil materials away from edge of excavations.

3.7 SOIL MOISTURE CONTROL

A. Uniformly moisten or aerate subgrade and each subsequent fill or backfill soil layer before compaction to within 2 percent of optimum moisture content.

1. Do not place backfill or fill soil material on surfaces that are muddy, frozen, or contain frost or ice.

2. Remove and replace, or scarify and air dry, otherwise satisfactory soil material that exceeds optimum moisture content by 2 percent and is too wet to compact to specified dry unit weight.

3.8 COMPACTION OF SOIL BACKFILLS AND FILLS

A. Place backfill and fill soil materials in layers not more than 8 inches in loose depth for material compacted by heavy compaction equipment, and not more than 4 inches in loose depth for material compacted by hand-operated tampers.

B. Place backfill and fill soil materials evenly on all sides of structures to required elevations, and uniformly along the full length of each structure. All surfaces shall be free of any change in level greater than ½” and must comply with all ADA standards for accessible routes.

C. Compact soil materials to not less than the following percentages of maximum dry unit weight according to ASTM D 698:

1. Under structures, building slabs, steps, and pavements, scarify and compact top 12 inches of existing subgrade and each layer of backfill or fill soil material at 97 percent.

2. Under turf or unpaved areas, scarify and compact top 6 inches below subgrade and compact each layer of backfill or fill soil material at 85 percent.

3.9 SUBBASE AND BASE COURSES UNDER FOOTINGS AND SHELTER PADS

A. Place subbase course and base course on subgrades free of mud, frost, snow, or ice.

B. On prepared subgrade, place subbase course and base course under pavements and walks as follows:

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1. Place subbase course and base course that exceeds 6 inches in compacted thickness in layers of equal thickness, with no compacted layer more than 6 inches thick or less than 3 inches thick.

2. Compact subbase course and base course at optimum moisture content to required grades, lines, cross sections, and thickness to not less than 97 percent of maximum dry unit weight according to ASTM D 698.

3.10 PROTECTION

A. Protecting Graded Areas: Protect newly graded areas from traffic, freezing, and erosion. Keep free of trash and debris.

B. Repair and reestablish grades to the specified tolerances where completed or partially completed surfaces become eroded, rutted, settled, or where they lose compaction due to subsequent construction operations or weather conditions.

C. Where settling occurs before Project correction period elapses, remove finished surfacing, backfill with additional soil material, compact, and reconstruct surfacing.

1. Restore appearance, quality, and condition of finished surfacing to match adjacent work, and eliminate evidence of restoration to greatest extent possible.

3.11 DISPOSAL OF SURPLUS AND WASTE MATERIALS

A. Refer to Section 01010 General Requirements for disposal of debris.

END OF SECTION 02300

07/19 CAST-IN-PLACE CONCRETE

CDT CABIN PAD 03300-1

SECTION 03300 - CAST-IN-PLACE CONCRETE

PART 1 - GENERAL

1.1 SUMMARY

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

B. See Section 02300 - Earthwork for fill under slabs-on-grade.

1.2 SUBMITTALS

A. Material Data: For steel reinforcement.

B. Design Mixtures: For each concrete mixture.

1.3 QUALITY ASSURANCE

A. Manufacturer Qualifications: A firm experienced in manufacturing ready-mixed concrete products and that complies with ASTM C 94/C 94M requirements for production facilities and equipment.

B. ACI Publications: Comply with the following unless modified by requirements in the Contract Documents:

1. ACI 301, "Specification for Structural Concrete," Sections 1 through 5.

2. ACI 117, "Specifications for Tolerances for Concrete Construction and Materials."

C. Pre-installation Conference: Conduct conference at Project site.

PART 2 - PRODUCTS

2.1 FORM-FACING MATERIALS

A. 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.

B. 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.

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2.2 STEEL REINFORCEMENT

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

B. 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."

2.3 CONCRETE MATERIALS

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

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

B. Normal-Weight Aggregates: ASTM C 33, graded, 3/4-inch nominal maximum coarse-aggregate size.

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

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

D. Air-Entraining Admixture: ASTM C 260.

E. 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. Water-Reducing Admixture: ASTM C 494/C 494M, Type A.

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

3. Water-Reducing and Retarding Admixture: ASTM C 494/C 494M, Type D.

4. High-Range, Water-Reducing Admixture: ASTM C 494/C 494M, Type F.

5. High-Range, Water-Reducing and Retarding Admixture: ASTM C 494/C 494M, Type G.

F. Synthetic Fiber: Monofilament or fibrillated polypropylene fibers engineered and designed for use in concrete pavement, 1/2 to 1-1/2 inches long.

2.4 CURING MATERIALS

A. Evaporation Retarder: Waterborne, monomolecular film forming, manufactured for application to fresh concrete.

B. Water: Potable.

C. Clear, Waterborne, Membrane-Forming Curing Compound: ASTM C 309, Type 1, Class B, dissipating.

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2.5 CONCRETE MIXTURES

A. 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.

B. Cementitious Materials: Use fly ash, pozzolan, ground granulated blast-furnace slag, and silica fume as needed to reduce the total amount of Portland Cement, which would otherwise be used, by not less than 40 percent.

C. Proportion normal-weight concrete mixture as follows:

1. Minimum Compressive Strength: 3000 psi at 28 days.

2. Maximum Water-Cementitious Materials Ratio: 0.45.

3. Slump Limit: 5 inches, plus or minus 1 inch.

4. Air Content: 6 percent, plus or minus 1.5 percent at point of delivery for 3/4-inch nominal maximum aggregate size.

5. Synthetic Fiber: Uniformly disperse in concrete mixture at manufacturer's recommended rate, but not less than 1.0 lb. /cu. yd.

2.6 FABRICATING REINFORCEMENT

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

2.7 CONCRETE MIXING

A. Ready-Mixed Concrete: Measure, batch, mix, and deliver concrete according to ASTM C 94/C 94M, 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.

PART 3 - EXECUTION

3.1 FORMWORK

A. 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.

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

C. Chamfer exterior corners and edges of permanently exposed concrete.

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3.2 EMBEDDED ITEMS

A. 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 GEOTEXTILE

A. General: Comply with ITD Standard Specification 718.07 for material and placement standards.

3.4 STEEL REINFORCEMENT

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

3.5 JOINTS

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

B. Control Joints: Install so strength and appearance of concrete are not impaired, at locations indicated or as approved by Contracting Officer. Tooled or sawed joints shall be acceptable.

3.6 CONCRETE PLACEMENT

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

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

C. Cold-Weather Placement: Comply with ACI 306.1.

D. Hot-Weather Placement: Comply with ACI 305R.

3.7 FINISHING FORMED SURFACES

A. Rough-Formed Finish: As-cast concrete texture imparted by form-facing material with tie holes and defects repaired and patched. Remove fins and other projections that exceed specified limits on formed-surface irregularities.

1. Apply to concrete surfaces not exposed to public view.

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3.8 FINISHING FLOORS AND SLABS

A. General: Comply with ACI 304R recommendations for screeding, restraightening, and finishing operations for concrete surfaces. Do not wet concrete surfaces.

B. 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.

C. 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.

D. Broom Finish: Apply a broom finish to exterior concrete.

3.9 CONCRETE PROTECTING AND CURING

A. 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 305R for hot-weather protection during curing.

B. Evaporation Retarder: Apply evaporation retarder to unformed concrete surfaces if hot, dry, or windy conditions cause moisture loss approaching 0.2 lb. /sq. ft. x h 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.

C. Cure concrete by one or a combination of the following methods:

1. Moisture Curing: Keep surfaces continuously moist for not less than seven days.

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.

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.

4. Curing and Sealing Compound: Apply uniformly to floors and slabs indicated in a 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.

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3.10 CONCRETE SURFACE REPAIRS

A. 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.

END OF SECTION 03300

C. Pre-installation Conference: Conduct conference at Project site.

F. Synthetic Fiber: Monofilament or fibrillated polypropylene fibers engineered and designed for use in concrete pavement, 1/2 to 1-1/2 inches long.