DLL BUEC and TACAN Pole Replacement Specifications.pdf

FEDERAL AVIATION ADMINISTRATION July 13, 2021 Replacement of DLL BUEC & TACAN/RCO Tilt-Over-Poles at Baraboo, WI

00 01 10 – TABLE OF CONTENTS

DIVISION 01 - GENERAL REQUIREMENTS

01 10 00 SUMMARY OF WORK

01 31 00 PROJECT MANAGEMENT AND COORDINATION

01 33 00 SUBMITTAL PROCEDURES

01 60 00 PRODUCT REQUIREMENTS

01 71 33.10 PROTECTION OF WORK AND PROPERTY

01 77 00 CLOSEOUT PROCEDURES

DIVISION 03 – CONCRETE

03 30 00 CAST-IN-PLACE CONCRETE

DIVISION 26 – ELECTRICAL

26 05 26 GROUNDING AND BONDIND FOR ELECTRICAL SYSTEMS

DIVISION 31 – EARTHWORK

31 20 00 EARTH MOVING

APPENDIX – ATTACHMENTS

ATTACHMENT 1 SITE PHOTOS

ATTACHMENT 2 SUBMITTAL COVER SHEET

ATTACHMENT 3 DRAWINGS

ATTACHMENT 4 EOSH Impacts CSA EOSH Checklist Form 3900-17 Form 3900-18 Form 3900-19

END OF SECTION 00 01 10

DIVISION 01 – GENERAL REQUIREMENTS

SECTION 01 10 00 SUMMARY

PART 1 – GENERAL

1.1 SUMMARY

A. This specification covers general requirements for the replacement of the tilt-over-poles at the DLL VOR site at Baraboo, WI. In general, all parts of this Specifications covering construction require on project drawings and other Contract documents are applicable to this Contract.

B. The Contractor shall furnish all plant, labor, materials, equipment, energy, transportation, and other services necessary to construct all elements of the systems required in the Specifications, Drawings, and other Contract documents. Construction shall include all miscellaneous and incidental work necessary for a complete and operational system, whether or not such work is specifically shown or specified.

1.2 WORK COVERED BY CONTRACT DOCUMENTS

A. Project Information

1. Site Identification: DLL BUEC, DLL TACAN/RCO

2. Project Location: LAT 43°33'3.03"N, LON 89°45'49.11"W

3. Project Engineer: Sary Sancen, 847-294-7100

B. The work consists of, but not limited to the following:

1. Coordinate with local FAA SSC personnel and commercial cable locators to locate and mark all underground utilities prior to digging.

2. An equipment outage will be required prior to start of construction. A request must be made 30 days in advance.

3. Outline location of antenna base for FAA approval.

4. Local FAA personnel will remove existing antennas from pole.

5. Contractor shall pull back signal cables from the poles to the junction box, demolish poles and existing foundations in its entirety. Return signal cables to local FAA.

6. Construct new concrete pier foundations. Construct and install two new rigid fiberglass antenna masts, counterpoise and lightning protection.

7. The existing BUEC junction box and supports shall remain and be protected during construction. All cables from the junction box to the building shall be reused. Any damage to equipment to remain shall be restored at the Contractor’s expense.

8. The TACAN/RCO junction box, foundation and supports shall be removed and new junction box shall be furnished and installed at the pole and at the building. Install new cables in conduit from junction box to junction box.

9. Furnish and install new cables for both poles from the junction box to the pole crossarm, leave slack at both ends for FAA termination.

10. Remove portion of the wooden fence where it interferes with the BUEC pole in its tilt position. Add a small gate to match existing fence.

11. Reconstruct crushed rock plot around foundations.

12. Clean and restore site to original condition. Dispose of debris at approved waste site and in accordance with local regulations. Restore all areas disturbed by construction activity or vehicles per specifications.

13. Participate in CAI and address punch list items if any.

1.3 SITE VISIT

A. It is recommended that the Contractor perform a field inspection prior to bid submission in or-der to inform himself of the specific working conditions applicable at the site and to ascertain the correct types/amounts of work to be performed. If the bidder chooses not to visit the site, he will nevertheless be charged with knowledge of conditions that a reasonable inspection would have disclosed. A site visit date will be set up by the Contracting Officer and the Facility Manager. Prospective bidders shall contact the Contracting Officer (CO) for the date and time.

1.4 CONTRACTOR FURNSIHED MATERIAL

A. The contractor is responsible for furnishing all materials. There will be no FAA furnished materials under this contract.

B. The Contractor is advised that materials have a long lead time and therefore should plan to have submittals shortly after award of Contract to assure timely delivery of materials and so to not delay the start of Construction.

1.5 USE OF PREMISES

A. General: Prior to start of Construction, Contractor shall coordinate access to the site with local

FAA

B. Ingress and egress to the work areas and contractor parking will be discussed at the preconstruction meeting. Keep all vehicles, working equipment and materials within the area designated by the COR.

C. No badging or training will be required. Do not disturb portions of Project site beyond areas in which the Work is indicated.

D. The existing building shall be protected from any damage during construction.

1.6 WORK RESTRICTIONS

A. On-Site Work Hours: Work shall be generally performed during normal business working hours of 7 a.m. to 5 p.m., Monday through Friday, except otherwise indicated.

1. No work will be performed on weekends and federal holidays.

2. Work shall be performed during a scheduled work week of 40 hours.

3. Any work outside of the shift will be considered overtime work. The Contractor may work overtime provided the Contractor notifies the COR a minimum of 48 hours in advance of any weekend, holiday, or overtime work.

4. The start and stop times shall typically be coordinated with the schedules of the FAA COR or facility personnel to minimize or prevent the need for overtime work by FAA personnel.

B. Expected job duration: Fifteen (15) business days.

C. Nonsmoking Building: Smoking is not permitted within the building or within 25 feet of entrances, operable windows, or outdoor air intakes.

1.7 SANITARY FACILITIES

A. Restroom facilities are not available on site. Temporary facilities shall be provided by the Contractor as required to meet the needs of the tradespeople.

END OF SECTION 01 10 00

SECTION 01 31 00 - PROJECT MANAGEMENT AND COORDINATION

1.1 COORDINATION

A. All correspondence between the contractor and FAA must be through the FAA’s Contracting Officer (CO) or the Contracting Officer’s Representative (COR).

B. At no expense to the FAA, procure all construction and working permits required by local and state agencies.

C. Pre-Construction Conference: The contractor shall attend a pre-construction conference when required by the contracting officer. The contractor shall abide by all agreements reached at the conference regarding safety practices, access to site, deference to air traffic if necessary, and any other operational procedures.

D. Safety Meeting: Contractor shall hold a tailgate safety meeting prior to commencement of work each day, in the presence of the FAA to discuss possible safety hazards and mitigation.

E. All work must be accomplished by experienced workers in accordance with the highest stand-ards of the various work trades involved. Workers must abide by safety requirements, set forth by OSHA, that correspond to the type of work being performed. See EOSH documents in At-tachment 4 of this document.

F. Contractor’s Warranty: The contractor shall supply the FAA with a one-year workmanship warranty. In the event any work related to the installation of the fiberglass mast is found to be defective or otherwise not in accordance with the manufacturer’s documents or contract docu-ments within one year of completion, the contractor shall repair or replace at no cost to the

FAA.

END OF SECTION 01 31 00

SECTION 01 33 00 – SUBMITTAL PROCEDURE

1.1 SUBMITTALS PROCEDURES

A. Contractor shall submit a list of materials for FAA approval prior to the commencement of construction. Contractor is asked to use the Submittal Cover Sheet in Attachment 2 for ease of review.

B. Processing Time: It is the Contractor’s responsibility to allow 10 days for submittal review. A resubmittal would require additional time. No extension of the Contract Time will be authorized because of failure to transmit submittals enough in advance of the Work to permit processing, including resubmittals.

C. In making a formal request for substitution, the Contractor represents that they have investigated the proposed product and have determined that it is equal to or superior in all respects to that specified.

D. Contractor shall submit a construction schedule which shall be approved by FAA prior to construction.

E. As-Built Drawings: Contractor shall maintain a complete set of construction drawings at the site, and make daily annotations to document as-built conditions. At project completion, and prior to final payment, the contractor shall submit red-lined as-built drawings to COR.

F. Procurement Before Approval: The contractor is advised not to procure any item for which submittal approval is required but not yet granted. If approval is denied, the contractor will be prevented from installing the disapproved item(s). The contractor must transmit a new submittal package for the new items replacing the disapproved items, and must procure only approved items. The contractor shall take responsibility for the delivery and installation of any items installed before submittal approval is granted. The FAA reserves the right to discontinue field work on any item furnished without submittal approval. Procuring and/or installing material which is later disapproved could result in substantial losses of money and time for the contractor.

END OF SECTION 01 33 00

SECTION 01 60 00 S – PRODUCT REQUIREMENTS

1.1 PRODUCT DELIVERY, STORAGE, AND HANDLING

A. Deliver, store, and handle products using means and methods that will prevent damage, deterioration, and loss, including theft and vandalism. Comply with manufacturer's written instructions.

B. Delivery and Handling:

1. Schedule delivery to minimize long-term storage at Project site and to prevent overcrowding of construction spaces.

2. Deliver products to Project site in an undamaged condition in manufacturer's original sealed container or other packaging system, complete with labels and instructions for handling, storing, unpacking, protecting, and installing.

3. Inspect products on delivery to determine compliance with the Contract Documents and to determine that products are undamaged and properly protected.

1.2 ASBESTOS FREE CERTIFICATION

A. The contract shall provide the Contracting Officer (CO) a signed statement stating that to the best of his/her knowledge; no asbestos-containing building materials were used.

B. The Contractor shall submit to the CO Material Safety Data Sheets (MSDS), prior to con-struction, for all materials and/or products to be utilized during the course of the project ac-complishment. During the course of the project, both the COR and the Contractor shall rou-tinely check products utilized on-site to ensure only products which have had MSDS submit-ted are utilized. Copies of all MSDS shall be turned over to the local FAA office for their records.

1.3 HAZARDOUS MATERIAL AND SAFETY

A. The Contractor shall provide workers protection per OSHA 29 CFR 1926.62.

B. The Contractor shall be responsible for safety on the work site. It is the responsibility of the Contractor to eliminate hazards which may result in tripping, electrical shock, fire, falling ob-jects, environmental hazards, vehicular accidents, etc. The Contractor shall comply with all safety precautions required by OSHA. The Contractor shall have two l5 lb. Class B and C fire extinguishers at the work area through the progress of welding, metal cutting, or any other pro-cess involving a spark or fire hazard.

END OF SECTION 01 60 00 S

SECTION 01 71 33.10 – PROTECTION OF WORK AND PROPERTY

1.1 PROTECTION AND RESTORATION OF PROPERTY AND LANDSCAPE: The contractor shall be responsible for the preservation of all public and private property. The Contractor shall be responsible for all damage or injury to property of any character, during the prosecution of the work, resulting from any act, omission, neglect, or misconduct in its manner or method of executing the work, or at any time due to defective work or materials, and said responsibility will not be released until the work is completed and accepted. When or where any direct or in-direct damage or injury is done to public or private property by or on account of any act, omis-sion, neglect, or misconduct in the execution of the work, or in consequence of the nonexecu-tion thereof by the Contractor, the Contractor shall restore, at its own expense, such property to a condition similar or equal to that existing before such damage or injury was done, by repair-ing or otherwise restoring as may be directed by the COR, or it shall make good such damage or injury in an acceptable manner, at no additional cost to the Government.

END OF SECTION 01 71 33.10

SECTION 01 77 00 – CLOSEOUT PROCEDURES

1.1 GENERAL

A. Contractor shall participate in Contractor Acceptance Inspection (CAI) and shall address all punch list items generated by FAA.

B. Submit Redlined Drawings to the project engineer or local FAA.

C. Complete final cleaning requirements.

1.2 FINAL CLEANING

A. General: Provide final cleaning. Conduct cleaning and waste-removal operations to comply with local laws and ordinances and Federal and local environmental and antipollution regulations.

B. Complete the following cleaning operations:

1. Clean Project site, yard, and grounds, in areas disturbed by construction activities, including landscape development areas, of rubbish, waste material, litter, and other foreign substances.

2. Remove tools, construction equipment, machinery, and surplus material from Project site.

C. Comply with safety standards for cleaning. Do not burn waste materials. Do not bury debris or excess materials on FAA's property. Do not discharge volatile, harmful, or dangerous materials into drainage systems. Remove waste materials from Project site and dispose of lawfully.

END OF SECTION 01 77 00

SECTION 03 30 00 - 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, for the following:

1. Pier foundations

1.2 Slabs-DEFINITIONS

A. 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 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. Source Limitations: Obtain each type or class of cementitious material of the same brand from the same manufacturer's plant, obtain aggregate from one source, and obtain admixtures through one source from a single manufacturer.

C. ACI Publications: Comply with the following:

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

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

1.4 DELIVERY, STORAGE, AND HANDLING

A. Steel Reinforcement: Deliver, store, and handle steel reinforcement to prevent bending and damage.

PART 2 - PRODUCTS

2.1 FORM-FACING MATERIALS

A. 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.

B. Forms for Cylindrical Columns: fiber-reinforced tubes to full depth of pier. Provide units with sufficient wall thickness to resist plastic concrete loads without detrimental deformation. The exterior surface shall be uniformly wax impregnated for weather and moisture protection. The interior surface shall be coated with pure polyethylene uncontaminated by paraffin or other additives. A-coated Sonotube forms by Sonoco Products Company of Hartsville, South Carolina, are among the products that meet these Specifications.

C. Chamfer Strips: Wood, metal, PVC, or rubber strips, 3/4 by 3/4 inch, minimum.

D. 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.

1. Formulate form-release agent with rust inhibitor for steel form-facing materials.

E. 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.

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

2. Furnish ties that, when removed, will leave holes no larger than 1 inch in diameter in concrete surface.

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

2.2 STEEL REINFORCEMENT

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

2.3 REINFORCEMENT ACCESSORIES

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

2.4 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/II. May supplement with the following:

a. Fly Ash: ASTM C 618

b. Ground Granulated Blast-Furnace Slag: ASTM C 989, Grade 120.

B. Silica Fume: ASTM C 1240, amorphous silica.

C. Normal-Weight Aggregates: ASTM C 33, Class 3S coarse aggregate or better, graded.

1. Maximum Coarse-Aggregate Size 3/4 inch nominal.

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

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

2.5 ADMIXTURES

A. Air-Entraining Admixture: ASTM C 260.

B. 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.

6. Plasticizing and Retarding Admixture: ASTM C 1017/C 1017M, Type II.

2.6 CURING MATERIALS

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

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

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

1. Products:

a. Anti-Hydro International, Inc.; AH Curing Compound #2 DR WB.

b. Burke by Edoco; Aqua Resin Cure.

c. ChemMasters; Safe-Cure Clear.

d. Conspec Marketing & Manufacturing Co., Inc., a Dayton Superior Company;

W.B. Resin Cure.

e. Dayton Superior Corporation; Day Chem Rez Cure (J-11-W).

f. Euclid Chemical Company (The); Kurez DR VOX.

g. Kaufman Products, Inc.; Thinfilm 420.

h. Lambert Corporation; Aqua Kure-Clear.

i. L&M Construction Chemicals, Inc.; L&M Cure R.

j. Meadows, W. R., Inc.; 1100 Clear.

k. Nox-Crete Products Group, Kinsman Corporation; Resin Cure E.

l. Symons Corporation, a Dayton Superior Company; Resi-Chem Clear Cure.

m. Tamms Industries, Inc.; Horncure WB 30.

n. Unitex; Hydro Cure 309.

o. US Mix Products Company; US Spec Maxcure Resin Clear.

p. Vexcon Chemicals, Inc.; Certi-Vex Enviocure 100.

2.7 CONCRETE MIXTURES, GENERAL

A. 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. Limit percentage, by weight, of cementitious materials other than portland cement in concrete as follows:

1. Fly Ash: 25 percent.

2. Combined Fly Ash and Pozzolan: 25 percent.

3. Ground Granulated Blast-Furnace Slag: 50 percent.

4. Combined Fly Ash or Pozzolan and Ground Granulated Blast-Furnace Slag: 50 percent portland cement minimum, with fly ash or pozzolan not exceeding 25 percent.

5. Silica Fume: 10 percent.

6. Combined Fly Ash, Pozzolans, and Silica Fume: 35 percent with fly ash or pozzolans not exceeding 25 percent and silica fume not exceeding 10 percent.

7. Combined Fly Ash or Pozzolans, Ground Granulated Blast-Furnace Slag, and Silica

Fume: 50 percent with fly ash or pozzolans not exceeding 25 percent and silica fume not exceeding 10 percent.

B. Limit water-soluble, chloride-ion content in hardened concrete to 0.15 percent by weight of cement.

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

1. Use water-reducing or plasticizing admixture in concrete, as required, for placement and workability.

2. Use water-reducing and retarding admixture when required by high temperatures, low humidity, or other adverse placement conditions.

3. Use water-reducing admixture in pumped concrete and concrete with a water-cementitious materials ratio below 0.50.

4. Use corrosion-inhibiting admixture in concrete mixtures where indicated.

2.8 CONCRETE MIXTURES FOR BUILDING ELEMENTS

A. Proportion normal-weight concrete mixture as follows:

1. Minimum Compressive Strength: 4000 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: 6 percent, plus or minus 1.5 percent at point of delivery for 3/4-inch nominal maximum aggregate size.

2.9 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.

B. Project-Site Mixing: Measure, batch, and mix concrete materials and concrete according to ASTM C 94/C 94M. Mix concrete materials in appropriate drum-type batch machine mixer.

1. For mixer capacity of 1 cu. yd. or smaller, continue mixing at least 1-1/2 minutes, but not more than 5 minutes after ingredients are in mixer, before any part of batch is released.

2. For mixer capacity larger than 1 cu. yd., increase mixing time by 15 seconds for each additional 1 cu. yd..

3. Provide batch ticket for each batch discharged and used in the Work, indicating Project identification name and number, date, mixture type, mixture time, quantity, and amount of water added. Record approximate location of final deposit in structure.

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

1. Class D, 1 inch for rough-formed finished surfaces.

D. Construct forms tight enough to prevent loss of concrete mortar.

E. 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.

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

F. Chamfer: exterior corners and edges of permanently exposed concrete.

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

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

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

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.

1. Install anchor rods, accurately located, to elevations required and complying with tolerances in Section 7.5 of AISC's "Code of Standard Practice for Steel Buildings and Bridges."

3.3 STEEL REINFORCEMENT

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

B. 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.

1. Weld reinforcing bars according to AWS D1.4, where indicated.

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

3.4 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. Do not add water to concrete during delivery, at Project site, or during placement unless approved by COR.

C. 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. Deposit concrete to avoid segregation.

1. Deposit concrete in horizontal layers of depth to not exceed formwork design pressures or not exceeding 18 inches.

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.

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

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

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

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

4. 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.

E. Concrete Piers: All piers shall be formed to full depth in fiber forms. No spillage over the tops of forms will be permitted. Remove all loose soil from bore holes so that concrete will bear on undisturbed soil. Support forms rigidly and in proper horizontal and vertical alignment. After pouring remove only that part of each form that will be exposed above grade. Backfill excess space between bore holes and forms with thoroughly compacted inorganic soil. Do not use sand backfill.

F. 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.

1. 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.

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

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

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

1. 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.

2. 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

A. Rough-Formed Finish: As-cast concrete texture imparted by form-facing material with tie holes and defects repaired and patched.

3.6 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 301 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. Formed Surfaces: Cure formed concrete 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.

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

1. 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.

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

2. 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.

a. After curing period has elapsed, remove curing compound without damaging concrete surfaces by method recommended by curing compound manufacturer.

3. Curing and Sealing Compound: Apply uniformly to 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.

Repeat process 24 hours later and apply a second coat. Maintain continuity of coating and repair damage during curing period.

END OF SECTION 03 30 00

SECTION 26 05 26 - GROUNDING AND BONDING

PART 1 - GENERAL

1.1 SUMMARY

A. This Section includes methods and materials for grounding systems and equipment. FAA grounding requirements often exceed NFPA 70 criteria.

1.2 REFERENCES

A. The publications listed below form a part of this Specification to the extent referenced. The publications listed below are referenced as the latest edition published as of the date of this document. The publications are referred to within the text by the basic designation only.

B. FAA Specifications and Standards

1. FAA-STD-19f Lightning and Surge Protection, Grounding, Bonding and Shielding

C. National Fire Protection Association (NFPA)

1. NFPA 70 National Electrical Code

2. NFPA 780 Standard for the Installation of Lightning Protection Systems

D. Institute of Electrical and Electronics Engineers (IEEE)

1. IEEE 1100 Powering and Grounding Sensitive Electronic Equipment

2. IEEE 81 Guide for Measuring Earth Resistivity, Ground Impedance, and Earth

Surface Potentials of a Ground System

3. IEEE C62.41 Recommended Practice for Surge Voltages in Low-Voltage AC Power

Circuits

E. Underwriters Laboratories (UL)

1. UL 467 Grounding and Bonding Equipment

2. UL 486A Wire Connectors and Soldering Lugs for Use with Copper Conductors

F. American Society for Testing and Materials (ASTM)

1. ASTM B 3 Standard Specification for Soft or Annealed Copper Wire

2. ASTM B 33 Standard Specification for Tinned Soft or Annealed Copper Wire for

Electrical Purposes

3. ASTM B 8 Standard Specification for Concentric-Lay-Stranded Copper Conductors, Hard, Medium-Hard, or Soft

G. Occupational Safety and Health Administration (OSHA)

1. 29 CFR 1910.7 Definitions and Requirements for a Nationally Recognized Testing Laboratory (NRTL)

1.3 SUBMITTALS

A. Submittals shall be provided by the Contractor for the following items:

1. All Grounding Materials

1.4 WIRING AND CABLE GROUNDING CONDUCTORS

A. Conform to NFPA 70, except as otherwise indicated for conductor properties, including stranding.

B. Material: Copper. Use only copper wire for both insulated and bare grounding conductors in direct contact with earth, concrete, masonry, crushed stone, and similar materials.

C. Size: Comply with FAA-STD-19f.

D. Equipment Grounding Conductors: Insulated with green color insulation.

1. The equipment grounding conductor shall be routed in the same raceway as its’ related phase and neutral conductors. Conduit or cable shields shall not be used as the equipment grounding conductor.

2. A parity size equipment grounding conductor shall be bonded to bonding bushings at each end of each raceway section with a bonding jumper the same size as the initially established minimum size equipment grounding conductor – installed as shown by Figure I. Note: Where flexible metal conduit is encountered, liquid tight flexible metal conduit must be used – which provides a bonding terminal integral to an end connector listed for grounding.

Figure I – Bonding of Conduit and Equipment Grounding Conductor

3. All flexible metal conduits shall be provided with an external bonding jumper in addition to the internal equipment grounding conductor. Therefore, liquid tight flexible metal conduit must be used where any flexible metal conduit is required. The bonding jumper shall be a 6 AWG green-insulated stranded copper conductor – or the largest jumper the conduit grounding bushing permits. The bonding jumper shall terminate on fittings listed for grounding at each end of the liquid tight flexible metal conduit.

E. Grounding-Electrode Conductors: Stranded cable.

F. Underground Conductors: Bare, tinned, stranded, except as otherwise indicated.

G. Bare Copper Conductors: Conform to the following:

1. Solid conductors: ASTM B 3.

2. Assembly of stranded conductors: ASTM B 8.

3. Tinned conductors: ASTM B 33.

1.5 MISCELLANEOUS CONDUCTORS

A. Braided Bonding Jumpers: Where electrical continuity across the shock mounts is necessary, bonding jumpers shall be installed across each shock mount. Jumpers of this application should have a maximum thickness of 0.025-inch, so that the damping efficiency of the mount is not impaired. CONNECTOR PRODUCTS

B. Exothermic-Welded Connections: Provided in kit form and selected per manufacturer's written instructions for specific types, sizes, and combinations of conductors and connected items.

1.6 GROUNDING ELECTRODES

A. Grounding Rods: Grounding rods shall be copper or copper-clad steel, a minimum of 10 feet in length and 3/4-inch in diameter. Rod cladding shall not be less than 1/100-inch thick. The top of the grounding electrode shall be a minimum of 12 inches below finished grade. Conductors shall be attached to electrodes with exothermic welds only. Sectionalized type or exothermic butt welded rods shall be used when deeper earth penetration is required. Ground rods shall bear the manufacturer's name, trademark, and catalog number.

PART 2 - EXECUTION

2.1 SEQUENCING AND SCHEDULING

A. Interruption of Power: Contractor is advised that an unscheduled power interruption to any system is not allowed. Work requiring a temporary or permanent de-energizing of the electrical service shall be scheduled and approved in writing by the Contracting Officer's Technical Representative at least 30 calendar days in advance of performance of the work. Work may not commence until written authorization is received from the Contracting Officer's Technical Representative.

2.2 PROTECTION

A. Protect existing electrical equipment and installations when performing new work. If damaged or disturbed in the course of the work, remove damaged portions and install new products of equal capacity, quality, and functionality. Remove demolished material from the project site.

Remove, store, clean, re-install, reconnect, and make operational components indicated for relocation.

2.3 APPLICATION

A. Equipment Grounding Conductors: All metallic non-current carrying parts of electrical equipment shall be grounded with equipment grounding conductors whether or not shown on the drawings. Equipment grounding conductors shall be green insulated copper conductors unless otherwise indicated. In no case shall conductors be smaller than No. 12 AWG.

B. Connections to Lightning Protection System: Bond grounding conductors, including grounding-conductor conduits, to lightning protection down conductors or lightning protection grounding conductors in compliance with NFPA 780, FAA-STD-019f.

C. Grounding Bushing: Provide a grounding bushing for rigid steel conduit entering or leaving a junction box. Ground both ends of the rigid conduit from the grounding bushings to the counterpoise using a #2 AWG minimum bare copper cable, or as indicated on the drawings.

Conduit fittings and joints shall be electrically continuous with bonding resistance of 1 milliohms or less between joined parts.

D. Metallic Non-current Carrying Parts: All metallic non-current carrying parts of electrical and mechanical equipmentshall be bonded by welding with a separate equipment grounding conductor . All metallic non-current carrying parts of electrical and mechanical equipment shall be grounded with equipment grounding conductors whether or not shown on the drawings.

2.4 INSTALLATION

A. The grounding requirements exceed those of NFPA 70. Grounding system shall be as indicated on the contract drawings and as specified herein. Reference FAA-STD-019f and IEEE 1100 when installing equipment. In no case shall NFPA 70 be violated.

B. Ground Rods: Install ground rods as follows:

1. Grounding rods shall be as widely spaced as practical, and in no case shall be spaced less than 1 rod length apart. Nominal spacing between rods shall be between 2 and 3 times rod length.

2. Tops of vertically-driven ground rods shall be not less than 12 inches below grade level.

3. Ground rods shall be located 2 to 6 feet outside the foundation or exterior footing of the structure. On buildings with overhangs, ground rods may be located further out.

C. Grounding Electrode Conductor:

1. The grounding electrode conductor shall be bare or insulated copper, and shall be sized as shown in the contract documents. When not indicated in the contract documents, the conductor shall be copper and sized according to NFPA 70, except that the conductor shall not be smaller than #2 AWG. The grounding electrode conductor shall be bonded to the earth electrode system with an exothermic-welded joint.

D. Grounding Conductors: Route along the shortest and straightest paths possible, except as otherwise indicated. Avoid obstructing access or placing conductors where they may be subjected to strain, impact or damage.

E. Earth Electrode System:

1. Ground rods shall be interconnected by a buried, bare, #4/0 AWG 7-strand copper cable.

The cable shall be buried at least 2 feet below grade level. Connections to the ground rods shall be made by exothermic-welding. The interconnecting cable shall close on itself, forming a complete loop, with the ends exothermically-welded.

2.5 CONNECTIONS

A. Make connections so possibility of galvanic action or electrolysis is minimized. Select connectors, connection hardware, conductors, and connection methods so metals in direct contact will be galvanically compatible. Use electroplated or hot-tin-coated materials to ensure high conductivity and to make contact points closer in order of galvanic series. Make connections with clean, bare metal at points of contact. Coat and seal connections having dissimilar metals with inert materials to prevent future penetration of moisture to contact surfaces.

B. Exothermic-Welded Connections: Use for connections to structural steel, for underground connections, and where indicated on drawings. Comply with manufacturer's written instructions. Welds that are puffed up or that show convex surfaces indicating improper cleaning are not acceptable.

2.6 ADJUSTING AND CLEANING

A. Restore surface features, including vegetation, at areas disturbed by work of this Section.

Reestablish original grades, except as otherwise indicated. Where sod has been removed, replace it as soon as possible after backfilling is completed. Restore areas disturbed by trenching, storing of dirt, cable laying, and other activities to their original condition.

END OF SECTION 26 05 26

SECTION 31 20 00 - EARTH MOVING

PART 1 – GENERAL

1.1 Section Includes:

1. Excavating and backfilling for structures.

2. Subsurface drainage backfill for trenches.

3. Excavating and backfilling trenches.

1.2 SUBMITTALS

A. Product Data: For each type of the following manufactured products required:

1. Geotextiles.

PART 2 - PRODUCTS

2.1 GEOTEXTILES

A. Subsurface Drainage Geotextile: Nonwoven needle-punched geotextile, manufactured for subsurface drainage applications, made from polyolefins or polyesters; with elongation greater than 50 percent; complying with AASHTO M 288 and the following, measured per test methods referenced:

1. Survivability: Class 2; AASHTO M 288.

2. Grab Tensile Strength: 157 lbf; ASTM D 4632.

3. Sewn Seam Strength: 142 lbf; ASTM D 4632.

4. Tear Strength: 56 lbf; ASTM D 4533.

5. Puncture Strength: 56 lbf; ASTM D 4833.

6. Apparent Opening Size: No. 40 sieve, maximum; ASTM D 4751.

7. Permittivity: 0.2 per second, minimum; ASTM D 4491.

8. UV Stability: 50 percent after 500 hours' exposure; ASTM D 4355.

2.2 SOIL MATERIALS

A. Sub-base Materials:

1. Naturally or artificially graded mixture of natural or crushed gravel, crushed stone, crushed slag, or natural crushed sand.

B. Backfill and Fill Materials:

1. Materials complying with ASTM D 2487 soil classification groups GW, GP, GM, SM, SW, and SP; free of clay, rock or gravel larger than 2 inches in any dimension; debris;

waste; frozen materials; and vegetable and other deleterious matter.

2.3 CRUSHED AGGREGATE SURFACING

A. Crushed rock or crushed stone aggregate shall comply with State Specifications quality requirements for crushed rock or crushed stone used for road surface course, and shall be of the State gradations most closely conforming with the following gradation:

Sieve Size Total Passing, Percent

1-inch 100

3/4-inch 80-100

3/8-inch 30-60

No. 4 48-65

No. 8 35-50

No. 30 19-30

No. 50 13-23

No. 100 7-15

No. 200 0-8

2.4 ACCESSORIES

A. Detectable Warning Tape: Acid- and alkali-resistant, polyethylene film warning tape manufactured for marking and identifying underground utilities, a minimum of 6 inches wide and 4 mils thick, continuously inscribed with a description of the utility, with metallic core encased in a protective jacket for corrosion protection, detectable by metal detector when tape is buried up to 30 inches deep; colored as follows:

1. Red: Electric.

2. Orange: Telephone and other communications.

PART 3 - EXECUTION

3.1 PREPARATION

A. Protect structures, utilities, 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 DEWATERING

A. Prevent surface water and ground water from entering excavations, from ponding on prepared subgrades, and from flooding Project site and surrounding area.

B. Provide and maintain pumps, well points, sumps, suction and discharge lines, and other dewatering system components necessary to convey water away from excavations.

C. Protect subgrades from softening of bearing materials, undermining, washout, and damage by rain or water accumulation.

1. Reroute surface water runoff away from excavated areas. Do not allow water to accumulate in excavations. Do not use excavated trenches as temporary drainage ditches.

3.3 EXCAVATION FOR STRUCTURES

A. Excavating and backfilling for foundations and trenches shall not proceed when excessively wet or freezing weather conditions could adversely affect the load-bearing characteristics of the soil, or prevent proper compaction.

B. All excavations shall comply with OSHA requirements. Shore and brace as required for stability of excavation.

C. Shoring and Bracing: Establish requirements for trench shoring and bracing to comply with local codes and authorities. Maintain shoring and bracing in excavations regardless of time period excavations will be open. Remove shoring and bracing when no longer required.

D. Protect excavation bottoms against freezing when atmospheric temperature is less than 35 degrees F.

E. 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.

1. Excavations for Foundations: Do not disturb bottom of excavation. Trim bottoms to required lines and grades to leave solid base to receive other work.

2. Excavation for Electrical Utility Structures: Excavate to elevations and dimensions indicated. Do not disturb bottom of excavations intended as bearing surfaces.

3.4 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.

B. Stockpile soil materials away from edge of excavations and at FAA approved location.

3.5 BACKFILL INCLUDING UTILITY TRENCH

A. Place backfill on subgrades free of mud, frost, snow, or ice.

B. Backfill excavations as promptly as work permits, but not until shoring and bracing has been removed, voids have been backfilled, and trash and debris has been removed.

C. Place and compact bedding course on trench bottoms and where indicated. Shape bedding course to provide continuous support for joints, fittings, and bodies of conduits.

D. Backfill voids with satisfactory soil while removing shoring and bracing.

E. Place and compact initial backfill of satisfactory soil, free of particles larger than 1 inch in any dimension, to a height of 12 inches over the pipe or conduit.

F. Place and compact final backfill of satisfactory soil to final subgrade elevation.

G. Install warning tape directly above utilities, 12 inches below finished grade.

3.6 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.

3.7 COMPACTION OF SOIL BACKFILLS AND FILLS

A. All compaction shall be accomplished by using power operated mechanical equipment.

B. 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.

C. Place backfill and fill soil materials evenly on all sides of structures to required elevations, and uniformly along the full length of each structure.

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

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

2. For utility trenches, compact each layer of initial and final backfill soil material at 85 percent.

3.8 GRADING

A. General: Uniformly grade areas to a smooth surface, free of irregular surface changes.

1. Provide a smooth transition between adjacent existing grades and new grades.

2. Cut out soft spots, fill low spots, and trim high spots to comply with required surface tolerances.

B. Site Rough Grading: Slope grades to direct water away from buildings and to prevent ponding.

3.9 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 where completed or partially completed surfaces become eroded, rutted, settled, or where they lose compaction due to subsequent construction operations or weather conditions.

3.10 RESTORATION

A. Where gravel plot has been removed, it shall be replaced as soon as possible after the backfilling is completed. All areas disturbed by the trenching, storing of dirt, cable laying, pad construction, and other work shall be restored to the original condition. Restoration shall include any necessary grading as required to restore the disturbed area to match the adjacent area. The Contractor shall be held responsible for maintaining all disturbed and restored surfaces until final acceptance.

2.2 DISPOSAL OF SURPLUS AND…