Technical_Specifications.pdf

TECHNICAL SPECIFICATIONS

FOR THE

CONSTRUCTION

OF THE

COMMUNICATION TOWER

AT HERCULES DRIVE

FOR THE

TOWN OF MANCHESTER,

CONNECTICUT

TABLE OF CONTENTS

Contents

PART I B GENERAL REQUIREMENTS

1.0 GENERAL

2.0 WORK INCLUDED

3.0 COORDINATION

4.0 DEFINITIONS OF TERMS

5.0 OWNER FURNISHED MATERIALS

6.0 CONTRACTOR FURNISHED MATERIAL

7.0 SUBMITTALS FOR APPROVAL

8.0 CAST-IN-PLACE CONCRETE AND REINFORCING STEEL

9.0 OR-EQUAL CLAUSE AND SUBSTITUTIONS

10.0 SUBMITTALS

11.0 FINAL DRAWINGS AND MANUALS

12.0 SPECIFICATIONS AND STANDARDS

13.0 LOCAL CONDITIONS

14.0 EXECUTION

PART II A - CIVIL REQUIREMENTS - EARTHWORK

1.0 GENERAL

2.0 EXECUTION

PART II B - CIVIL REQUIREMENTS CAST-IN-PLACE CONCRETE & REINFORCING

STEEL

1.0 GENERAL

2.0 STANDARDS

3.0 CONCRETE MATERIALS AND ADMIXTURES

4.0 REQUIRED CONCRETE PROPERTIES

5.0 REINFORCING BARS

6.0 EXECUTION

PART II C -CIVIL REQUIREMENTS FENCE

PART II D - CIVIL REQUIREMENTS - ERECTION OF COMMUNICATION TOWER

1.0 GENERAL

2.0 EXECUTION

PART III A - ELECTRICAL REQUIREMENTS - RACEWAY

1.0 GENERAL

2.0 PRODUCTS

3.0 EXECUTION

PART III B - ELECTRICAL REQUIREMENTS - GROUNDING SYSTEM

1.0 GENERAL

2.0 PRODUCTS

3.0 EXECUTION

PART III C - ELECTRICAL REQUIREMENTS - INSULATED CONDUCTORS

1.0 GENERAL

2.0 PRODUCTS

3.0 EXECUTION

PART III D - ELECTRICAL REQUIREMENTS - INSTALLATION OF EQUIPMENT……. 40

1.0 SUMMARY

2.0 EXECUTION

PART III E - LIGHTING

Town of Manchester, CT Hercules Communication Tower Installation

GENERAL PART I

B - GENERAL REQUIREMENTS

1.0 GENERAL

1.1 To require the Contractor to provide complete and operable tower despite omission of specific reference to any minor component part.

1.2 To require the Contractor to provide all materials and equipment as necessary for the tower installation.

1.3 Report any errors or ambiguities in specifications to the Engineer as soon as detected. The Engineer and/or the Owner will answer questions and interpret intended meaning of specification. Their interpretations shall be accepted as final.

1.4 Clarifications and interpretations shall be requested no later than three (3) business days prior to scheduled bid date.

1.5 Questions shall be directed to the Engineer. The Engineer and/or the

Owner will issue an opinion on all questions and provide any necessary written clarifications.

1.6 The Owner’s interpretation shall be accepted as final.

1.7 Any exceptions taken by the Contractor to any Specification shall be clearly and simply stated or summarized; using an itemized format, in a specially prepared letter of transmittal attached to and made a part of the Bidder’s proposal.

1.8 An itemized list of substitutions proposed by the Bidder and subject to the “Or-Equal Clause”.

1.9 A proposed schedule outlining major project activities, milestones, and sequencing must be included in the Bidder's proposal.

1.10 Proposed warranties, including option for extended warranties, if available.

2.0 WORK INCLUDED

2.1 Work included under these specifications includes civil and structural construction and electrical equipment installation for the Hercules Drive Communication Tower.

2.2 The work under this Contract/these Contracts for the Hercules Drive Communication Tower shall include, but not be limited to:

2.2.1 All earthwork and site grading prior to and after the electrical construction.

2.2.2 The installation of the perimeter security fence and gates around the tower.

2.2.3 The construction of all foundations as shown on the drawings. This includes earthmoving, backfill, compacting and gravel surfacing.

2.2.4 Erection of all tower steel, and all electrical equipment necessary to provide a complete working installation.

2.2.5 Furnishing and installing all above and below ground conduits and handholes.

2.2.6 All interface wiring for the communication equipment.

3.0 COORDINATION

3.1 Equipment and material not in immediate use shall be stored in Contractor assigned equipment storage areas. Excavated soils intended for use as backfill shall be removed to outside of the construction area and located in an area approved by the Owner.

4.0 DEFINITIONS OF TERMS

4.1 "Bidder”, “Seller”, or “Contractor”, shall be considered synonymous terms and shall mean the person, firm, or corporation with whom the Owner may enter into a contract for execution of the work specified. This shall be inclusive of all subcontractors required for completion of the work described.

4.2 “Owner” shall mean:

Town of Manchester Connecticut 41 Center Street Manchester, CT 06045

Correspondence with the Owner shall be directed to:

Manchester Police Department

239 Middle Turnpike East

Manchester, CT 06040

Attn: James White, Superintendent of Communications whitej@manchesterct.gov

4.3 “Engineer” shall mean:

Town of Manchester Engineering Division 494 Main St.

P.O. Box 191 Manchester, CT 06045-0191

Correspondence with the Engineer shall be directed to:

Attn: Jeff LaMalva, P.E., Town Engineer jlamalva@manchesterct.gov

4.4 “Drawings” shall mean the drawings included with this specification.

4.5 “Site” in the construction specification and associated document refers specifically to Hercules Drive Communication Tower site, access drive, and work area. This may also be referred to in this specification occasionally as “job site”.

5.0 OWNER FURNISHED MATERIALS

5.1 No material will be furnished by the Owner. The Owner will provide legal access to the work site and any required material storage or laydown areas.

6.0 CONTRACTOR FURNISHED MATERIAL

6.1 All material directly and indirectly required to complete the project as described in the drawings and specifications shall be furnished by the Contractor

6.1 Where specifications or drawings identify individual components, members, or other items of material, materials of equal quality and performance may be used, provided that such substitution is of equal design and quality, and that this substitution is acceptable to the Owner.

6.2 The Owner shall have final decision regarding the acceptability of proposed substitutions of material or equipment.

6.3 Approval of substitutions by the Engineer or the Owner shall not, in any way, excuse the Seller of responsibility for providing workmanship, material, and equipment equal to that specified.

6.4 The Contractor will have or will provide all drawings known or believed to be required for construction of the project. However, if desired by the Owner, or necessary, to describe substitutions of material, additional drawings may be furnished to describe construction requirements. Any such drawings must be reviewed and approved by the Owner prior to issuing "For Construction" copies.

7.0 SUBMITTALS FOR APPROVAL

7.1 Contractor shall provide outline drawings, descriptive data, installation & operation instructions, electrical schematics, and wiring diagrams for all electrical equipment and materials.

7.2 Contractor shall provide material samples, catalog data, drawings, specifications, and all other approval information for physical materials and components for the construction of the project.

8.0 CAST-IN-PLACE CONCRETE AND REINFORCING STEEL

8.1 Prior to placement of concrete, the Contractor shall submit to the Owner and

Engineer a concrete mix design and the name, manufacturer, and material specification sheet for each admixture and curing compound at least ten (10) business days prior to placing concrete. The mixture proportions and compressive strength (f’ c) of the proposed mix design shall be determined in accordance with

ACI 301.

8.2 Shop drawings shall be submitted to the Owner showing all accessories, sleeves, inserts, anchors, and other embedded items.

8.3 Certificates of compliance of materials with applicable ASTM standards and test reports.

8.4 Reinforcing steel shop drawings, detailed in accordance with ACI 315 and consisting of bending details, bar lists, and placing drawings.

8.5 Mechanical test reports of the tensile and bend tests for reinforcing steel.

9.0 OR-EQUAL CLAUSE AND SUBSTITUTIONS

9.1 Where specifications or drawings identify an item of material or equipment by manufacturer’s name and model/type, “or equal”, products of equal quality and performance by other manufacturers may be substituted provided that such substitution is of equal design and quality, and that this substitution is accepted in writing by the Owner.

9.2 The Contractor shall furnish descriptive information, cut sheets, data, and drawings to demonstrate to the Owner that material or equipment proposed is equal to that originally specified.

9.3 The Contractor shall be responsible for proving the equality of proposed substitutions.

9.4 The Owner shall have final decision regarding the acceptability of proposed substitutions of material or equipment.

9.5 In determining acceptability of proposed substitutions, the Owner will consider his familiarity with the proposed equipment, material stocking, and spare parts.

9.6 Approval of substitutions by the Owner shall not, in any way, excuse the

Contractor of responsibility for providing workmanship, material, and equipment equal to that specified.

10.0 SUBMITTALS

10.1 Drawings, where required for furnished equipment and material, are requested at the earliest possible date subsequent to Owner's acceptance of p roposal. Drawings shall be submitted to the Owner for approval of location of additions or any proposed modifications.

10.2 If approval drawings are required, submit drawings and any other supplementary data to the Owner in PDF format for review. Marked-up drawings indicating the

Owner's action will be returned to Contractor.

10.3 Contractor shall check shop drawings for errors, correctness of details, and conformance with the specifications prior to submittal. Notify the Owner of any inconsistencies or questions regarding approval revisions or comments shown on the

Drawings.

10.4 Owner will review shop drawings and indicate action taken according to the following classifications:

10.4.1 No Exceptions Taken: Indicates the shop drawing(s) have been reviewed and appears to be in general agreement with the requirements.

Seller may make further distribution of shop drawings and proceed with fabrication and/or installation of the work detailed on the drawings.

10.4.2 Make Corrections Noted: Design revisions, deletions, additions, and comments shown on these drawings shall be incorporated into the design before proceeding with fabrication or drawing distribution.

10.4.3 Revise and Resubmit: Indicates the shop drawing, or part thereof, does not appear to be in general agreement with the requirements. The

Owner’s comments are noted on the shop drawings and/or separate letter.

The Contractor shall recheck and make any necessary revisions and resubmit for Owner’s review.

10.4.4 Rejected: Indicates the shop drawings do not conform to requirements.

Reasons for rejection are noted on the shop drawing and/or separate letter.

10.5 If the drawing is returned to the Contractor with the action noted “RESUBMIT”, the drawing should be rechecked and revised as necessary and resubmitted in the manner described above.

10.6 The Contractor shall submit to the Owner three prints of all final “Certified” drawings. If shop drawings are computer generated utilizing AutoCAD, all drawings information shall be stored and submitted on an approved electronic format in addition to the reproducible copy.

10.7 The Contractor shall furnish five (5) copies of equipment device instruction manuals for each project covered by these specifications. The Owner shall approve these instruction manuals. Each co py shal l thoroughly address equipment device installation, operation, and maintenance. Manuals shall be bound by a durable means, properly indexed to identify contents and clearly labeled to indicate Owner, project, and equipment covered.

10.8 Notify the Owner of any inconsistencies of questions regarding approval revisions or comments on the drawings.

10.9 Review of shop drawings by the Owner does not relieve the Contractor of responsibility for errors, correctness of details, or conformance with the specifications.

10.10 Fabrication and shipment of any device or equipment prior to Owner’s release of drawings, data, and information mentioned herein, shall be at the Seller’s risk.

10.11 The Contractor agrees that submittals and shop drawings processed by the Owner are not change orders, that the purpose of submittals and shop drawings by the

Contractor is to demonstrate to the Owner that the Contractor understands the design concept. The Contractor alone accepts all responsibility for assuring all materials furnished under these specifications meet in full all requirements of the contract documents.

10.12 The Owner’s review is for general conformance with the design concept and contract documents. Markings or comments shall not be construed as relieving the Contractor from compliance with the project plans and specifications, nor departures there from.

The Contractor remains responsible for details and accuracy for confirming and correlating all quantities and dimensions.

10.13 The Seller may use his own form of transmittal letter for distribution of shop drawings, clearly marked “For Approval” or “Certified” as applicable.

10.14 The Owner reserves the right to accept or reject any and all alternates.

11.0 FINAL DRAWINGS AND MANUALS

11.1 Instructions: Manufacturers' original instruction manuals covering installation, operation and maintenance for all furnished equipment are required. Submit to the

Owner for distribution, three (3) copies of bound instruction manuals and final drawings for equipment and material furnished under these specifications.

11.2 Record Drawings, "As-Built", or "Final" Drawings: The Contractor shall keep and maintain, at the job site, one record set of specifications, addenda, change orders , modi f icat ions , fu l l s ize contract d rawings , and shop drawings. On these, the Contractor shall mark all project conditions, locations, configurations, and any other changes or deviations which may vary from the details represented on the original contract drawings, including buried or concealed construction and utility features which are revealed during the course of construction. Drawing markups shall include any detailed sketches as necessary to fully indicate t h e work as actually constructed. These master record drawings of the Contractor’s representation of as-built conditions, including all revisions made necessary by addenda, change orders, and the like shall be maintained up- to date during the progress of the work.

11.3 Record drawings shall be accessible to the Owner or Engineer at all times during the construction period and shall be delivered to the Owner or Engineer upon completion of the work.

11 .4 Requests for partial payment will not be approved if the record drawings are not kept current, and not until the completed record drawings, showing all variations between the work as actually constructed and as originally shown on the Contract Drawings or other Contract Documents, have been inspected by the Engineer.

11.5 Final drawings and manuals shall be provided at completion of construction, by direct mail to the Owner.

12.0 SPECIFICATIONS AND STANDARDS

12.1 All materials that will become a part of the completed work shall conform to other specifications and standards referred to herein.

12.2 All materials furnished which are specified by reference to Federal Specifications, National

Standards, or their standard specifications or codes shall be in compliance with the latest editions or revisions thereof in effect on the date of bid.

12.3 In the event of conflicting requirements between a referenced specification, standard, or code and these specifications, these specifications or the more stringent code shall govern.

13.0 LOCAL CONDITIONS

13.1 The Owner will provide site access for electrical and mechanical facilities.

14.0 EXECUTION

14.1 EXAMINATION

14.1.1 The Contractor shall be thoroughly familiar with the site conditions, drawings, and specifications before submitting a proposal.

14.1.2 The Contractor shall carefully examine the work site and adjacent premises, and shall conduct the necessary investigations to inform themselves of the facilities for handling the equipment at the site and the difficulties, including electrical hazards, terrain, access, etc., involved in the completion of all work in accordance with the specifications.

14.1.3 No plea of ignorance of conditions that exist, or of difficulties that may be encountered in the execution of the work because of failure to make the necessary preliminary examination and investigations, will be accepted as an excuse for any failure for omission on the part of the Contractor to fulfill the requirements of the specifications.

CIVIL REQUIREMENTS - PART II

A - EARTHWORK

1.0 GENERAL

1.1 SUMMARY

1.1.1 Technical requirements and standards of construction that apply to any excavation and compaction required as a consequence of work performed under these Specifications.

1.1.2 Clearing, grubbing, trenching, excavation, back fill, and compaction required under these specifications. Cost of excavation and backfill work for the Project shall be included under the specific items of work, such as grading, foundations, conduit, and ground mat.

2.0 EXECUTION

2.1 CLEANING

2.1.1 During performance of the work, the Contractor shall keep a reasonable degree of order by disposing of accumulated rubbish and waste material at the completion of the daily work; the site shall be cleared of all debris, food wrappers, tools, consumable supplies, and material that may have accumulated during the work.

2.1.2 Where the Contractor, after due notice, fails to keep the area of his work clean and safe, or fails to clean the area after completion of work, the

Owner may perform this work and the cost will be covered by the Contractor and may be deducted from the sums due.

2.2 CLEARING

2.2.1 Areas to be excavated or trenched shall be cleared and grubbed prior to start of excavation operations on the areas. Clear areas of newly placed surface yard stone down to the natural mineral soil. Surface yard stone shall be stockpiled outside of the fence and shall be kept separate from the other materials. Only stone material furnished new for the project may be used.

2.3 EXCAVATION

2.3.1 Any excess excavation or over excavation performed by the Contractor for any purpose or reason, and any back filling, compacting of backfill, and concrete work occasioned thereby shall be at the expense of the Contractor, unless otherwise required in these specifications.

2.3.2 Excavated soils shall be stockpiled such that they do not block access to any equipment on site. Contractor shall obtain Owner’s permission before establishing any area within the project site for storage of excavated material.

2.3.3 Stockpiles of material intended for use as backfill shall be maintained above

32 degrees Fahrenheit. If the material pile falls to 32 degrees Fahrenheit or below at the surface, none of the stockpile shall be used for backfill within the fence until the temperature of the material is above 32 degrees

Fahrenheit.

2.4 EXCAVATION FOR FOUNDATIONS

2.4.1 As shown on the drawings, excavation work consists of work for slabs, drilled piers, gravel driveway, underground conduit, and tower foundation.

2.4.2 All excavation for foundations shall be of size and depth shown on the drawings. The minimum excavated depth will be as shown on the drawings and additional depth may be required and paid for as set forth in the unit price.

2.4.3 All excavation for concrete structures shall be made to the prescribed depths.

All excavation for trenches and for buried electrical cables and conduits shall be as shown on the drawings and specified herein or when lines and depth of excavation are not shown on the drawings or specified herein, then as prescribed by the Owner.

2.4.4 The Contractor shall insure positive drainage away from communication tower and building pads during construction and after final grading has been completed. Top of concrete shall be as shown on drawings.

2.4.5 Contractor shall coordinate and pay for all underground utility location services before proceeding with sub-grade work. Contractor shall pay for all costs associated with damaging existing underground facilities.

2.4.6 All soft, muddy, and undesirable material shall be removed from the bottom of excavations before fill is introduced. Excavated surfaces shall be tamped or rolled to form firm and consistent surfaces for the placing of foundations.

Unless the concrete can be poured the same day as excavation to final grade, a seal coat of 2-inch thick concrete is recommended to be poured to protect the condition of the excavation bottom from water seeping in.

2.5 DISPOSAL OF EXCAVATED MATERIALS

2.5.1 Material removed in excavation and not suitable or required for backfill, embankments, or other required earthwork shall be removed from the immediate site and disposed of by the Contractor.

2.6 BACKFILL AND FILL

2.6.1 The type of material used for back fill, the amount thereof, and the manner of depositing the material shall be subject to approval of the Owner.

The owner expects the fill to be compromised of the material and placed in the manner as outlined in section M.02.05 – Pervious Structure Backfill as defined within the State of Connecticut Department of Transportation, Standard Specifications for Roads, Bridges, Facilities and Incidental

Construction, Form 819, dated 2024 and as supplemented.

2.6.2 Fill material shall contain no aggregate larger than 3 inches in diameter. No material shall be placed in backfill when either the material or the surfaces on which it is to be placed is frozen.

2.6.3 Fill shall be placed and compacted to match the lines and the grades shown on the drawings, prescribed in this specification, or as existing. All backfill shall be placed, moistened, and compacted in accordance with the requirements these specifications.

2.6.4 The costs of furnishing water and moistening backfill materials, as well as placing and compacting backfill, shall be included in the applicable bid prices in the schedule for items of work for which the backfill is required.

2.7 FINAL GRADING

2.7.1 Final Grading: After all foundations, structures, backfilling, and compaction is completed, the construction area shall be final graded to remove ruts and high spots leaving a uniform surface sloped for drainage. Any settlement occurring over trench and ditch areas during the effective contract time, shall be backfilled and leveled at no additional expense to Owner. All graded areas shall be protected from erosion by properly diverting surface water runoff.

2.7.2 Stone: A continuous 6” thick layer of Owner approved crushed stone will be placed evenly and graded to cover the project site. The stone shall be crushed with fractured faces; round river rock will not be accepted. A sample of the stone (5 gallon bucket) to be used shall be delivered to the site prior to bulk delivery for approval; and delivery trucks will be inspected for consistency.

The Owner expects the Contractor to use the crushed stone (yard rock) as specified in section M.02.01 – Broken or crushed stone as defined within the State of Connecticut Department of Transportation, Standard

Specifications for Roads, Bridges, Facilities and Incidental Construction, Form 819, dated 2024 and as supplemented.

The gradation, plasticity, resistance to abrasion and soundness requirements shall meet the requirements as defined in section M.02.06.

The Owner will also plan to have an initial sample tested for gradation, resistivity and % fractured face prior to delivery and in the event of any change of source pit or change in crushing process.

2.8 GEOTECHNICAL ENGINEERING EVALUATION

2.8.1 A formal geotechnical exploration of the project site has been performed and a copy of the report is included. This specification shall be reviewed by the

Contractor prior to all earthwork construction.

B - CAST-IN-PLACE CONCRETE & REINFORCING STEEL

1.0 GENERAL

1.1 SUMMARY

1.1.1 All concrete foundations and structures shall be built to the prescribed lines, grades, and dimensions shown on the drawings. All concrete foundations and concrete construction shall conform to the requirements of this section.

1.1.2 Contractor shall notify Owner immediately of any excavations that reveal soil conditions of high compressibility, low loading capability, extensive groundwater or other conditions considered marginal or uncommon, and may not have been considered in the design process.

1.1.3 Contractor shall furnish all materials for use in concrete, including cement, water, sand, coarse aggregate and specified admixtures; and shall furnish all reinforcing bars, anchor bolts not supplied by the Owner, fabric and materials for curing concrete.

2.0 STANDARDS

2.1.1 ACI Manual of Concrete Inspection

2.1.2 ACI 301 Specification for Structural Concrete

2.1.3 ACI 302 Guide for Concrete Floor and Slab Construction

2.1.4 ACI 304 Recommended Practices for Measuring, Mixing, Transporting, and Placing Concrete.

2.1.5 ACI 305 Recommended Practice for Hot Weather Concreting

2.1.6 ACI 306 Recommended Practice for Cold Weather Concreting

2.1.7 ACI 308 Recommended Practice for Curing Concrete

2.1.8 ACI 318 Building Code Requirements for Reinforced Concrete

2.1.9 ACI347 Recommended Practice for Concrete Form work

2.1.10 ASTM D3406 Standard Specification for Joint Sealants, Hot-Poured, Elastomeric Type for Portland Cement Concrete Pavements

2.1.11 ASTM A675 Standard Specification for Steel Bars and Bar Size

Shapes; Carbon; Hot-Rolled; special Quality; and Subject to Mechanical

Property Requirements.

2.1.12 CRSI MSP-2 Manual of Standard Practice

3.0 CONCRETE MATERIALS AND ADMIXTURES

3.1 Portland Cement

3.1.1 All Portland cement for use in concrete shall be Type I/II in accordance with ASTM Cl

3.1.2 Only one brand of cement shall be used

3.2 Flyash

3.2.1 If used, flyash shall be Class F and comply with ASTM C618.

3.3 Other Cementitious Admixtures

3.3.1 If other cementitious admixtures are to be used, such as Silica Fume, Blast

Furnace Slag Blended Cements or etc. They shall be approved by the design Engineer and conform to the respected ASTM standards.

3.4 Aggregates

3.4.1 The Coarse and Fine aggregate to be use in the concrete mixture shall meet the requirement of ASTM C33.

3.4.2 Maximum aggregate size shall be 3/4 inch.

3.5 Water

3.5.1 The water to be used in the concrete mixture shall be potable, clean and free for any debris and meet the requirements of ASTM C 94

3.5.2 Water shall not be added to the concrete mixture at the job site.

3.5.2.1 Exception to water addition prohibition: When concrete arrives at the point of delivery with a slump below that which will result in the specified slump at the point of placement and is unsuitable for placing at that slump, the slump may be adjusted to the required value by adding water up to the amount allowed in the accepted mixture proportions. Addition of water shall be in accordance with ASTM C 94/C 94M. Do not exceed the specified water-cementitious material ratio or slump. Do not add water to concrete delivered in equipment not acceptable for mixing. After plasticizing or high-range water-reducing admixtures are added to the concrete at the site to achieve flowable concrete, do not add water to the concrete. Measure slump and air content of air-entrained concrete after slump adjustment to verify compliance with specified requirements.

3.6 Chemical Admixtures

3.6.1 All chemical admixtures shall be approved by the design Engineer.

3.6.2 Concrete supplier shall have used individual admixture and any combinations of admixtures in the concrete mixture, previously with success.

3.6.3 Admixtures shall be from one supplier.

3.6.4 All admixtures shall be added at the batch plant.

3.6.5 Any admixture containing calcium chlorides shall not be used.

4.0 REQUIRED CONCRETE PROPERTIES

4.1 Drilled Pier Foundation Concrete

4.1.1 The concrete to use in drill pier foundations shall be as follows:

• 28 day f c compressive strength

• 4500 psi

• Maximum water-to-cement ratio (w/c) 0.45

• Slump 6”-l”to+2”

• Air Content 5%±1%

4.2 Slab on Grade and Spread Footer Foundation Concrete

4.2.1 The concrete to use in slab on grade and spread footer foundations shall be as follows:

• 28 day f c compressive strength

• 4500 psi

• Maximum water-to-cement ratio (w/c) 0.45

• Slump 4”±1”

• Air Content 5%±1%

5.0 REINFORCING BARS

5.1 All reinforcing bars shall conform to the most current revision of ASTM

615/A615M, grade 60 or ASTM A706/A706M, Grade 60 for welding applications.

5.1.1 All reinforcing bar shall be uncoated, unless noted otherwise on design drawings.

5.2 Reinforcing bar shop drawings shall be reviewed by the design Engineer.

6.0 EXECUTION

6.1 BATCHING AND MIXING

6.1.1 The concrete, excluding admixtures, shall be proportioned on the basis of batch weights.

6.1.2 Batching shall be such that combined inaccuracies in feeding and measuring the materials will be minimized.

6.1.3 The concrete shall be uniform in composition and consistency throughout the mixed batch, and from batch to batch, except where changes in composition or consistency are directed.

6.1.4 Mix shall be kept as dry as possible to place and finish without creation of voids.

6.1.5 The mixing time shall be sufficient to thoroughly mix the concrete, but excessive over mixing requiring the addition of water to preserve the required consistency will not be permitted.

6.1.6 Each batch of concrete delivered by truck mixer to the job site from a commercial batch plant shall be accompanied by a written certificate of batch weights and time of batching. The certificates shall be given to the

Owner at the job site.

6.1.7 Any concrete retained in truck mixers so long as to require additional water to permit satisfactory placing shall be wasted. No concrete shall be used if more than 90 minutes has elapsed since initial water was introduced into the batch.

6.1.8 All cold weather concreting shall be completed in accordance with the current version of ACI 306 when cold weather is present. Cold weather is defined in section 1.2 of ACI 3006.

6.1.9 If current conditions are not defined as cold weather, but freezing temperatures may occur, the concrete surface shall be protected against freezing for the first 24 hours after placing.

6.1.10 All hot weather concreting shall be completed in accordance with the current version of ACI 305R when hot weather is present. Hot weather is defined in section 1.2 of ACI 305R

6.1.11 Where the combination of air temperature, relative humidity, concrete temperature, and wind velocity, yield a rate of evaporation greater than

0.2 lbs/ft2/h according to figure 2.1.5 in ACI 205R, the requirement of ACI 205R shall be followed.

6.2 FORMS-PREPARATION AND PLACING

6.2.1 Forms shall be sufficiently tight to prevent loss of mortar from the concrete and shall be maintained rigidly in position until the concrete has hardened sufficiently to prevent damage by form removal.

6.2.2 In no instance shall forms be removed less than 3 days after placing concrete. When form work is removed less than 28 days after placing concrete, concrete shall be protected from moisture loss.

6.2.3 All surfaces of foundations upon or against which concrete is to be placed shall be free from standing water, mud and debris.

6.2.4 Earth shall be free from frost or ice. If the ground is frozen, no concrete shall be placed until the ground is at a temperature above freezing and all of the frost is out of the ground.

6.2.5 The surfaces of absorptive foundations against which concrete is to be placed shall be moistened thoroughly so that moisture will not be drawn from the freshly placed concrete.

6.2.6 Polyethylene film shall be used as a moisture barrier.

6.2.7 Concrete shall be placed in a single pour, without any cold joints.

6.2.8 Design and construction of form work shall be the responsibility of

Contractor. Failure of the form work resulting in the release of concrete shall be cause for change in the form work designer. Concrete released by the failure shall be discarded from the site. Released concrete may not be placed back in the forms.

6.2.9 Concrete shall be vibrated until it has been consolidated to the maximum practicable density, i s free from pockets of coarse aggregate, and conforms to all surfaces of forms and embedded materials.

6.2.10 Exposed unformed surfaces of other concrete shall be brought to uniform surfaces and worked with suitable tools to a broom finish as directed.

6.2.11 Continuous pours for blocks, slabs, beams, columns, and other monolithic pours shall not be interrupted. A pour will not be considered continuous if a surface is allowed to stand more than 30 minutes before additional concrete is poured against and made integral with it.

6.2.12 Concrete in deep foundations where free fall exceeds 6 feet, shall be placed in a manner that will avoid separation or rebound of the aggregate or displacement of the reinforcement. Suitable chutes, vertical pipes or tremies are recommended if greater than 6 feet to ensure best efforts are made for concrete to not fall directly onto rebar or onto the excavation sides.

6.3 TOLERANCES FOR CONCRETE CONSTRUCTION

6.3.1 The intent of this section is to establish tolerances that are consistent with modem construction practice yet are governed by the effect that permissible deviations will have upon the structural action or operational function of the structure.

6.3.2 Deviations from the established lines, grades, and dimensions will be permitted to the extent set forth in these specifications.

6.3.3 Concrete work that exceeds the tolerance limits specified in these specifications or shown on the drawings shall be remedied or removed and replaced at the expense of and by the Contractor.

6.3.4 Standard tolerances for form work and concrete placement shall be as follows, unless otherwise noted on drawings:

• Variation of individual structures ±1/8 inch from plan.

• Variation from specified top of concrete elevation: ± 1/8 inch.

• Variation of pier diameters: ±3 inch -0.5 inch.

• Variation of anchor bolt spacing in a single base plate or support

±1/16 inch.

• Variation between groups of anchor bolts: ±1/16 inch.

• Variation from level of surface of slab: Surface finish shall be to

FF 50 and FL 38 overall with minimum local values of FF 25 and FL

17. Time of measurement shall be at the time equipment is placed on the slab. Deflection of exposed sides of concrete walls and slabs: 0.050 inches per foot of length with maximum of 1 inch for entire length.

6.4 REINFORCEMENT

6.4.1 Steel reinforcing bars and fabric shall be placed in the concrete where shown on the drawings.

6.4.2 Before being placed, surfaces of reinforcement shall be cleaned of heavy flaky rust, loose-mill scale, dirt, grease, and other foreign substances.

6.4.3 Reinforcement shall be accurately placed and secured in position so that it will not be displaced during the placing of the concrete. At no time shall reinforcement be left in contact with earth after placing concrete.

Minimum cover shall be maintained.

6.4.4 Welding or tack-welding of grade 60 reinforcing bars will not be permitted. Supplying of additional reinforcement to prevent displacement or hold reinforcing in place shall be at the expense of the Contractor.

6.4.5 Reinforcing steel shall be securely wired and supported to provide clear spacing, as shown on the foundations detail drawings. Reinforcement will be inspected for compliance with requirements as to size, shape, length, splicing, position, and amount after it has been placed.

6.4.6 Unless shown otherwise, minimum cover over reinforcing steel shall be:

• Top of slabs: 2.0 inches.

• Bottom of slabs-on-grade: 3.0 inches.

• Top of piers: 2.0 inches.

• Sides and Bottom of piers and slabs: 3.0 inches.

6.4.7 Splice reinforcing steel according to ACT standards unless shown otherwise. Do not splice adjacent bars at same points unless approved by the

Owner. Splice length shall be as shown on the drawings. Reinforcing splicing shall only occur where necessary due to bar length or placement.

6.4.8 Unless shown otherwise, at corners or intersections of concrete walls, footings and continuous footings, horizontal steel is to be tied by dowels to match horizontal steel size and spacing (minimum 3'- 6" long legs on dowel).

6.4.9 Bars up to No. 7 may be cold bent once. Preheating is required for subsequent straightening or bending.

6.4.10 Heat for bending or straightening bars shall be applied as uniformly as possible over a length of bar equal to approximately 10 bar diameters. The bar temperature shall be between 1100° and 1200° F.

6.5 ANCHORBOLTS

6.5.1 Contractor shall install anchor and hold-down bolts into the concrete by means of a jig. This jig will be compatible with the holes in the bearing plate. This is to ensure a true fit when steel structures are erected.

6.6 PROTECTION AND CURING

6.6.1 Contractor shall protect all concrete against damage until final acceptance by Owner.

6.6.2 Concrete shall be protected against freezing temperatures by being kept at a temperature not lower than 50°F for at least 72 hours after it is placed.

Recording thermometers capable of showing maximum and minimum temperature supplied and maintained by the Contractor shall be used to determine surface temperature at the north side top of the concrete mass.

Thermometers used shall be accurate and inspected twice a day by the

Contractor and the Engineer. Minimum and maximum temperatures shall be recorded at each inspection.

6.6.3 Concrete that is water cured shall be protected against freezing temperatures for the duration of the curing period, 28 days. Where artificial heat is employed, special care shall be taken to prevent the concrete from drying.

6.6.4 Concrete and concrete-curing membrane shall be protected against damage by covering with plywood, sand, or other suitable material. After the danger of damage has diminished, the Contractor shall remove and dispose of such covering and all other foreign materials.

6.6.5 Concrete floors shall be cured with polyethylene-film covering.

6.6.6 Concrete cable trenches or pull boxes, where used, shall be cured by water curing or polyethylene-film covering.

6.6.7 Exposed-formed surfaces of all other pedestals, piers, and support foundations shall be cured by water curing, resin-base curing compound, or polyethylene-film curing.

6.6.8 If concrete is cured with curing compound, all surfaces of such concrete upon which equipment or metalwork will be grouted in place shall be cleaned thoroughly of all curing compound by wet sandblasting.

6.6.9 If concrete is water cured, the concrete shall be kept continuously moist for at least 28 days after being placed by sprinkling or spraying.

6.6.10 Resin based curing compound shall be a white-pigment scaling compound that forms a water-retaining membrane on surface of concrete.

6.6.11 Curing compound shall be applied to concrete surfaces by spraying one coat to provide a continuous uniform white membrane over all areas.

Coverage shall not exceed one hundred fifty (150) square feet per gallon.

Application shall be increased on rough surfaces, as necessary, to obtain required continuous membrane. All surfaces shall be kept continually moist until sealing compound is applied. As soon as surface film of moisture disappears, but while the surface still has a damp appearance, sealing compound shall be applied.

6.6.12 Curing with polyethylene film shall be by completely covering the designated concrete surfaces with polyethylene film to provide an airtight, water-retaining film over the entire concrete surface for at least 7 days.

As soon as the concrete has hardened sufficiently to prevent damage, all surfaces shall be thoroughly moistened by spraying them lightly with water and then covering them completely with the polyethylene film. Edges of the polyethylene strips shall be lapped to affect a seal to adjacent strips, and, at the extreme edge of the curing area, held tightly against the concrete surface. The polyethylene film shall be secured adequately to withstand wind and to prevent circulation of air inside the curing film.

6.7 FINISHING

6.7.1 All tie holes, visible on removal of forms shall be filled with concrete mortar of the same proportions as originally used in the foundations.

6.7.2 All vertical surfaces that are exposed above finish grade shall receive a floated finish. The surface shall be wetted and rubbed with a wood float in a uniform circular motion with fine sand being rubbed into the texture until the resulting surface is even and uniform in color and texture.

6.7.3 Horizontal surfaces that are exposed shall receive a broom finish.

Brooming shall begin when the water sheen has disappeared.

6.7.4 All exposed 90-degree edges on outdoor foundations shall be chamfered at

1/4 inch.

6.8 REPAIR OF CONCRETE

6.8.1 All concrete that is damaged or defective from any cause; concrete that is honeycombed, fractured, or otherwise defective; and concrete which, because of excessive surface depressions, must be excavated and built up to bring the surfaces to the prescribed lines shall be removed and replaced.

6.9 TESTING

6.9.1 All drilled pier, spread footer, slab on grade and any other foundation concrete shall be tested for the first delivery of each day and every 50 yd3 thereafter.

6.9.2 The testing shall include the following and be in accordance with the appropriate ATSM standard. Concrete sampling shall be completed in accordance with ASTM Cl72.

• Slump (ASTM Cl43)

• Unit Weight (C138)

• Air Content (Cl38)

• Temperature (Cl064)

• Compression Strength at 7 and 28 days (ASTM C39). Each test should include five (5) test cylinders. Two (2), shall be tested on day 7 and two (2) shall be test on day 28.

6.9.3 The results of the concrete testing shall be reported back to the design Engineer no later the one week after the concrete placement is completed and updated no later than one week after 28 day compression strength test. The report shall include:

• The name of the inspector testing the concrete and making the cylinders

• Mix type

• 7 day and 28 day compressive strength

• Slump

• Air and concrete temperatures at the time of pour

• Time of day at time of pour

• Air content

• Identification name or number of cylinders made

C - FENCE AND LIGHTING

1.1.1 Furnish and Install fencing, gates, signage, and security measures as shown on drawings.

2.0 EXECUTION

2.1 INSTALLATION

2.1.1 Perimeter Fence, furnish all labor and material required to erect a fence around the tower and buildings as shown on the drawings.

2.1.2 20ft Swinging Vehicle Gate, furnish all labor and material required to install vehicle gates in the yard as indicated in drawings.

2.1.3 Signage, furnish all labor and material required to install fence mounted signage for safety and location per project plans.

D - ERECTION OF COMMUNICATION TOWER

1.0 GENERAL

1.1 SUMMARY

1.1.1 Furnish and install steel tower to complete a finished installation. Tower is shown on the Drawings and on Steel Fabrication Shop Drawings.

2.0 EXECUTION

2.1 STEEL UNLOADING AND ASSEMBLY

2.1.1 Contractor shall unload or retrieve all components of steel structures.

2.1.2 All steel shall be temporarily stored on wood blocking until installation.

2.1.3 Equipment mounting bolts and nuts shall be high strength per ASTM A325 where specifically noted on drawings. Care shall be taken to install high strength bolts at locations specified. All bolts for tower erection will be supplied by Seller.

2.1.4 Care shall be taken to guard against damage during assembly. Repair of damage which is due to operations of the Contractor shall be made at the expense of the Contractor in a manner satisfactory to the Owner.

2.1.5 Zinc based paint and other miscellaneous materials and equipment required to correct damaged galvanizing shall be provided by the

Contractor.

2.2 STEEL INSTALLATION

2.2.1 All assembly and installation shall be done in a workman-like manner by competent craftsmen.

2.2.2 All bolted joints shall be properly tightened and pretensioned per the tum-of-the-nut method. Lock nuts shall be installed after nuts are properly pretension.

2.2.3 All foreign material deposited on the structures shall be removed prior to erection.

D - ERECTION OF COMMUNICATION TOWER

2.2.4 No steel shall be erected on the foundation until 28 days after last placing concrete or testing of concrete samples shows a strength over 3,000 psi or 75% of the 28 day required strength (whichever is greater) and approved by the Engineer.

2.2.5 All structures shall be installed on leveling nuts; adjust leveling nuts to level and plumb all steel.

2.2.6 Galvanized surfaces that are damaged shall be repaired. The damaged area shall be thoroughly cleaned and brushed with a wire brush. The process shall be submitted to the Owner for approval by the Owner before it is implemented. The galvanizing repair paint must deposit at least two ounces of zinc per square foot.

ELECTRICAL REQUIREMENTS - PART III

A - RACEWAY

1.0 GENERAL

1.1 SUMMARY

1.1.1 Installation of all materials associated with the raceway system including above and below grade conduit within the project site.

1.1.2 Contractor shall furnish and install above/below grade conduit for the

Hercules Communication Tower project. Conduit shall include all runs as indicated on drawings.

1.2 STANDARDS

1.2.1 NEMA

1.2.2 ANSI

1.2.3 National Electrical Code (NEC)

1.2.4 National Electrical Safety Code (NESC)

1.2.5 ASTM

1.3 SUBMITTALS

1.3.1 Contractor shall submit data/catalog cut sheets for proposed materials for Owner review per PART I, General Requirements.

2.0 PRODUCTS

2.1 CONDUIT ABOVE GROUND

2.1.1 Materials for above grade conduit installation shall include rigid galvanized steel (R.G.S. or RIGID), with continuous galvanized coating on interior and exterior as well as transparent overcoat of lacquer or zinc chromate. Conduit in direct contact with the earth shall be PVC coated.

2.1.2 Conduit accessories shall include conduit fittings, fasteners, clamps, supports, conduits and hardware, materials for sealing the ends of conduits terminating at outdoor equipment, and all other incidentals required to complete the conduit systems.

2.1.3 Substitution of liquid-tight conduit where drawings specify rigid conduit installations shall be reviewed and possibly approved by the Owner.

2.2 CONDUIT BELOW GROUND

2.2.1 Materials for below grade conduit installation shall consist of schedule 40 PVC conduit with accessories.

2.2.2 Conduit accessories shall include conduit fittings, PVC coated R.G.S. sweep elbows, couplings, PVC end bells, joint cement, hardware, materials for sealing the ends of conduits terminating at outdoor equipment, and all other incidentals required to complete the conduit systems.

2.2.3 The sealing material for sealing the ends of conduits terminating at boxes, manholes, or panel boards shall be "Duxseal" or Engineer approved equivalent.

2.2.4 Adhesive for joining plastic conduit shall be in accordance with the conduit manufacturer's recommendations.

2.3 JUNCTION BOXES, CABINETS, AND OUTLETS

2.3.1 Junction Boxes shall be NEMA 3R or NEMA 4.

2.3.2 Outlet Boxes and Switch Boxes - all outlet boxes, switch boxes, and associated fittings shall be constructed in accordance with UL 514, NEMA 3R.

2.3.3 All surface mounted outlet boxes, switch boxes, and associated fittings shall be galvanized malleable iron or acceptable equal cast ferrous metal for use with steel conduit.

2.3.4 All conduit entrances to equipment cabinets, junction boxes, switch boxes or outlets must be watertight and under no conditions shall conduit entrances to any equipment be through the top.

3.0 EXECUTION

3.1 INSTALLATION

3.1.1 The Contractor shall furnish and install all raceways and make all conduit connections to equipment.

3.1.2 The Contractor shall perform all excavation work and backfill in accordance with “PART II A-Civil Requirements -Earthwork”.

3.1.3 All conduits shall be installed complete with necessary fittings and supports, and all bends shall be gradual and smooth to permit the pulling of insulated electrical wires and cables without undue stress or damage to conductors.

3.2 CONDUIT INSTALLATION

3.2.1 Conduit installation shall be as indicated on the drawings and as described in these specifications. Below grade conduit shall be buried a minimum of 24 inches and 6 inches below the ground grid except where the conduit rises above grade.

3.2.2 Spacing of Supports - All conduit runs shall be rigidly supported. Support spacing along conduit runs shall be as follows:

3.2.2.1 1/2 inch through 1-1/4 inch 5 feet

3.2.2.2 1-1/2 inch and larger 10 feet

3.2.3 Contractor shall thoroughly swab and mandrel conduit, ensuring passages are clear before pulling cables.

3.2.3 All conduit runs and bends shall be free from indentations or flattened surfaces.

3.2.4 Burrs and sharp corners at the ends of each piece of metal conduit shall be removed.

3.2.6 The male threads of all rigid metal conduit joints shall be coated with a suitable graphite or zinc sealing material before making joints and shall be tightened securely to prevent the entrance of moisture or any other foreign material.

3.2.7 For steel conduit, the completed joints, terminations, wrench marks, and all other places where zinc covering is damaged shall be covered entirely with a protective varnish or zinc-based paint to provide protection from corrosion.

3.2.8 All joints in embedded nonmetallic conduit shall be completely and permanently sealed to prevent the entrance of water.

3.2.9 Lock nuts shall be installed to provide tight ground connections between conduit and equipment cabinets or junction boxes.

3.2.10 Bushings or chase nipples shall be installed on the ends of the conduit to protect the insulation or sheath of the wires or cables from abrasion.

3.2.11 The ends of conduits terminating at outdoor junction boxes and equipment cabinets shall be sealed with an approved sealing material, "Duxseal", or

Engineer approved equivalent, to prevent air, water, and rodents from entering conduit.

3.2.12 Above grade exposed conduits shall be rigidly supported at intervals of not more than ten feet.

3.2.13 The installation of above-grade conduit shall include, where required, the drilling of holes in cabinets, enclosures or plates for conduit entrance.

3.2.14 All exposed conduits shall be tightened securely and shall be supported rigidly in place.

3.2.15…