TECHNICAL

SPECIFICATIONS

PARKING LOT IMPROVEMENTS

SALTERS POOL PARKING LOT

BID 25/26-062

Town of Manchester, CT

MOBILIZATION AND PROJECT CLOSEOUT

TECHNICAL SPECIFICATIONS

MOBILIZATION AND PROJECT CLOSEOUT

DESCRIPTION

“Mobilization and Project Closeout” consist of all work necessary for moving project personnel and equipment to the project site; all work necessary for the establishment of the Contractors’ field offices, buildings and other facilities, if required, which are necessary for Contract performance; the preparation of work plans and other documents identified elsewhere in the

Contract that must be submitted by the Contractor prior to the start of physical construction;

demobilization of plant and equipment; completion of all physical work; and completion of administrative closeout items as required by the Contractor. It shall also include all work associated with the installation, maintenance and removal of items needed to provide a safe pedestrian passage through the work zone between Lydall Street and Salters Pond during construction.

MEASUREMENT

“Mobilization and Project Closeout” will be measured for payment in accordance with Section

9.75.04 of the Form 818.

PAYMENT

The work under this item will be paid for at the Contract lump sum price for “Mobilization and

Project Closeout” which price shall include materials, equipment, tools, transportation, labor and all work incidental thereto. Payment for this item shall be made only once per project site as depicted on the Plans.

Pay Item Pay Unit

Mobilization and Project Closeout Lump Sum

TS-1

CONSTRUCTION STAKING

CONSTRUCTION STAKING

DESCRIPTION

“Construction Staking” shall consist of retaining a Land Surveyor licensed in the State of

Connecticut who will be responsible for all locations, layout and reference staking necessary for proper control and satisfactory completion of the Work and acceptance of the Contract as specified herein.

The Contractor/Contractor’s Surveyor shall be solely responsible for the accuracy of the line and grade of all features of the Work. Any errors or apparent discrepancies found in previous surveys, Plans, Specifications, or Special Provisions shall be called to the Engineer’s attention by the Contractor for correction or interpretation prior to proceeding with the Work.

All construction staking shall be performed by qualified engineering or surveying personnel, under the direction of a Land Surveyor licensed in the State of Connecticut who is trained, experienced and skilled in construction layout.

The Contractor’s surveyor shall provide and maintain for the periods needed, as determined by the Engineer, reference stakes at various intervals outside the slope limits. Further, the

Contractor shall provide and maintain reference stakes at 50-foot station intervals along the baseline/offset baseline, immediately prior to and during the formation of sub-grade and the construction of all subsequent pavement layers.

Any and all monumentation within the construction area shall be clearly identified in the field with stakes, paint or other measures and preserved by the Contractor. The Contractor’s Land

Surveyor shall reset or replace disturbed survey markers, streetline monuments and private property markers when directed by the Engineer at no additional cost.

“Set Private Property Marker” shall consist of retaining a Land Surveyor licensed in the State of

Connecticut who will be responsible for the setting of markers in place of those impacted by the

Work at the locations indicated on the Plan.

MATERIALS

Granite stone monuments shall be 6" x 6" x 3'-9" (±3") surveyors bound sawn or dressed top with a 1/2" Dia. x 1" Deep hole.

Iron pins shall be three foot (36”), #5 reinforcing rod in conformance with Article M.06.01 in

Form 817 with a plastic cap set flush with grade. The plastic cap shall bear the name and license number of the responsible Land Surveyor.

Any concrete monuments disturbed during construction shall be replaced with granite stone monuments and any disturbed pipes and pins shall be replaced with iron pins as specified herein and directed by the Engineer at no additional cost.

The setting of PK/MAG type spikes may be permitted by the Engineer, if in the opinion of the

Engineer, iron pins/monuments cannot be reset.

TS-2

The setting of private property markers, as indicated on the Plan, shall be set with Brass Disks

(1” flat face) supplied by the Town unless otherwise directed by the Engineer.

Granular Fill shall conform to the requirements of “Granular Fill” elsewhere in these

Specifications.

CONSTRUCTION DETAILS - GENERAL

Prior to any construction activity, the Contractor shall retain a Land Surveyor licensed in the

State of Connecticut who will be responsible for furnishing all horizontal and vertical reference staking necessary for the Contractor to complete the Work and the Engineer to inspect the Work and for preparation of an electronic as-built drawing as defined herein.

The Engineer will supply the Contractor/Contractor’s Surveyor an electronic drawing file of the

“General Location Survey” along with the “Proposed Plan”, in AutoCAD .dwg format, containing, control, monumentation, baselines and other data to assist with construction staking.

The Contractor shall coordinate with utility companies to provide reference stakes to indicate the proposed edge of road/way in the vicinity of all new or relocated utility poles and underground utility lines. All stakes shall be properly referenced as to station, offset and shall be referenced to the proposed grade.

The Contractor shall retain a Land Surveyor licensed in the State of Connecticut who will be responsible for locating the existing “Private Property Markers” impacted by the Work and “Set

Private Property Markers” at the appropriate time and locations as previously determined by said

Surveyor per the Plans.

LOCATION OF EXISTING STREET LINE & PROPERTY CORNER MONUMENTATION

Unless approved otherwise by the Engineer, the Contractor’s surveyor shall complete the following field work prior to commencement of clearing and grubbing operations and other construction activities:

• Verify the existing control traverse as shown on the “General Location Survey”, which shall be utilized for all locations.

• Locate all existing street line monumentation and property corner markers within the construction area.

All locations shall be made to A-2 standards as defined in the “Minimum Standards for Surveys and Maps in the State of Connecticut”, as adopted by The Connecticut Association of Land

Surveyors Inc. on September 26, 1996, as amended.

Upon completing location of the existing control traverse and monumentation, the following information shall be delivered to the Engineer within TEN (10) CALENDAR DAYS:

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CONSTRUCTION STAKING

1. All original indexed field books, survey notes, electronic field book files, computation sheets.

2. An electronic drawing file provided in a compatible AutoCAD or .dxf format showing all monumentation, control points, and ties at a scale consistent with the “General Location

Survey” or as designated by the Town of Manchester. This file shall be submitted for approval prior to the contractor beginning the Clearing and Grubbing operation.

Clearing and grubbing and other construction activities in critical areas may be suspended until this information is reviewed and accepted by the Engineer.

MEASUREMENT AND PAYMENT

“Construction Staking” will be measured for payment by the lump sum. The lump sum unit price bid for “Construction Staking” shall include all materials, tools, equipment, labor and work incidental thereto for the work described in this Specification.

Partial payments for this item shall be as follows:

1. Payment equal to 25% of the lump sum bid price upon successful delivery of the electronic existing control traverse and monumentation location survey.

2. Payment equal to 75% of the lump sum bid price upon completion of construction activities.

The work “Set Private Property Marker” shall be paid for at the contract unit price bid. This price shall be for all the work required by this section and all materials, equipment, tools and labor incidental thereto.

Construction Staking Lump Sum

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CUT BITUMINOUS CONCRETE PAVEMENT

CUT BITUMINOUS CONCRETE PAVEMENT

DESCRIPTION

“Cut Bituminous Concrete Pavement” includes the sawcutting of existing bituminous concrete pavement at locations shown on the plans or as directed by the Engineer. It shall not include the cutting of bituminous concrete pavement associated with trenches, patches or driveways.

Not applicable.

CONSTRUCTION DETAILS

The existing bituminous concrete pavement shall be sawcut to a neat, straight line at the locations shown on the plans to a depth suitable to remove the pavement without damage to the adjacent pavement to remain.

“Cut Bituminous Concrete Pavement” will be measured for payment by the actual linear feet of cut made to the lines delineated on the plans or as directed by the Engineer. Existing pavement cuts beyond the limits shown on the plans, pavement cuts necessary for trench excavation, installation of curb or drainage structures, driveways, or any other item where the cutting of bituminous concrete pavement is included in the cost of that item, will not be measured for payment under this item.

This item will be paid for at the contract unit price per linear foot for "Cut Bituminous Concrete

Pavement" complete in place, which price shall include all materials, equipment, tools and labor incidental thereto.

Cut Bituminous Concrete Pavement Linear Foot

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REMOVE CONCRETE CURB

“Remove Concrete Curb” includes the removal and disposal of all existing concrete curb.

Not applicable.

The removal of concrete curb shall be made in conformity with the requirements of the plans and as ordered by the Engineer. All concrete, reinforcing, dowels, forms and joint material shall be removed. The base material, if any, may remain in place if the required depth for the materials to be placed in that area is provided. All existing curb which is designated to remain, shall be sawcut at the contract limits or the nearest joint as directed by the Engineer. Sawcut edges shall be protected during construction. Any edges damaged shall be recut and any material required to be placed in that area shall not be measured for payment.

The Contractor shall protect all existing trees, shrubs and landscaping, fences, mailboxes, utility poles, signs, sidewalks, driveways and pavements that are to remain. The Contractor shall repair, reset or replace these items as designated by the Engineer at no additional cost. Track type vehicles shall not be allowed on existing pavement areas. Any disturbance of lawn areas outside of the construction limits shall be restored to pre-construction condition and shall not be measured for payment.

All materials removed for this project shall be disposed of in accordance with all applicable regulations. No stockpiling of removed material shall be allowed on site.

Access to all private properties shall be maintained at all times.

Payment for “Remove Concrete Curb” shall be for the actual number of linear feet of concrete curb removed and properly disposed of, as shown on the plans or as directed by the Engineer.

The pay limits shall be measured in place with the Engineer prior to removal. Any material removed prior to measurement shall not be considered for payment.

The sawcutting of existing curb shall not be measured separately for payment.

“Remove Concrete Curb” will be paid for within the pay limits specified at the contract unit price per linear foot and shall include the furnishing of all tools, equipment, materials and labor necessary to complete the work as specified on the Plans or directed by the Engineer as measured under the methods described above.

Sawcutting of existing curb will not be paid for separately, but shall be included in the cost of this or other items.

TS-6

Remove Concrete Curb Linear Foot

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GRANULAR FILL

GRANULAR FILL

DESCRIPTION

“Granular Fill” includes the furnishing and installation of material to be used as a foundation for structures, as borrow, to replace unstable material in slopes and shoulders, to replace rock and unsuitable material in trenches, and elsewhere as indicated on the Plans or Specifications or where directed by the Engineer. It shall consist of gravel conforming to the requirements of these specifications.

Granular fill shall conform to the requirements of Section M.02.01 of Form 818.

When granular fill is used for foundation for structures, as backfill or to replace rock or unsuitable material in trenches, it shall be deposited in layers not over six (6) inches in depth, with each layer thoroughly compacted before the addition of other layers.

Only granular fill used to replace unsuitable material and rock in trenches or other areas directed by the Engineer will be measured for payment. It will be measured in place by the cubic yard after compaction within the payment lines shown or specified by the Engineer.

This work will be paid for at the contract unit price per cubic yard for "Granular Fill", complete in place, which price shall constitute full compensation for all materials, tools, equipment and

Granular Fill Cubic Yard

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EXCAVATION

EXCAVATION

DESCRIPTION

“Earth Excavation” shall consist of the removal and satisfactory disposal of all existing bituminous concrete and bituminous concrete curb within the proposed parking lot reconstruction limits.

Excavation for new sidewalks and sidewalk ramps are not included in this item as the excavation associated with these items are included in the unit cost for sidewalks or sidewalk ramps.

Trench excavation for new culverts, drainage structures and infiltration units are not included in this item as the excavation associated with these items are included with the unit cost for culverts, drainage structures and infiltration units.

“Test Pit Excavation” shall consist of the careful excavation to determine the horizontal and vertical location and size and material of an existing underground utility where shown on the plans or as directed by the Engineer.

Excavation shall be made in conformance to the limits and grades shown on the plans.

Excavation beyond the limits shown on the plans will not be measured for payment. Topsoil, sod and other organic matter shall be removed and disposed of.

When bedrock is encountered, it shall be excavated to the slope lines and depths indicated on the plans. All loose and unstable material shall be removed and disposed of. Any blasting shall conform to applicable local, State and Federal laws and regulations. The Contractor shall be responsible for all damage due either directly or indirectly to such operation.

All excavated material obtained within the project limits shall be used in the formation of embankments. Embankments shall be constructed of earth only. No bituminous concrete or reclaimed waste shall be used in the embankment. The material shall be free from refuse, stumps, roots, rocks, brush, weeds or other unsuitable material.

The depth of each layer, before compaction, shall not exceed twelve inches (12”). The embankment shall be crowned or pitched to provide drainage at the close of each day’s operation.

The entire embankment area shall be leveled off by suitable grading equipment and shall be compacted to at least the required minimum density by use of compaction equipment consisting of rollers, compactors or a combination thereof. The dry density after compaction shall not be less than 95 percent of the dry density for that soil when tested in accordance with AASHTO

T180, Method D. Each layer shall be compacted at optimum moisture.

All surplus excavated material shall become the property of the Contractor and disposed of off of the project site unless otherwise directed by the Engineer.

TS-9

EXCAVATION

Earth slopes shall be tracked by traversing the slopes with cleated tracks so that the cleat indentations are horizontal. Tracking shall be completed prior to placing topsoil. After all grading for the roadbed has been substantially completed and all drains installed, the subgrade shall be brought to the lines, grades and cross-sections shown on the plans. No particle over 3” shall in its greatest dimension be placed within 12” below the top of the prepared subbase.

All soft and yielding material within the subgrade shall be removed and replaced with suitable material. Compaction shall be as specified in Section 2.02 of Form 817. The Contractor shall protect the completed subgrade from damage. The subgrade shall be checked and approved by the Engineer prior to placing pavement structure thereon.

For test pit excavation, the Contractor shall follow all the requirements of “Call Before You

Dig”, including requesting utility markouts and hand-digging in the vicinity of the underground utility. The Contractor shall notify the Engineer 48 hours in advance of digging the test pit so the Engineer and the appropriate utility representative may be present.

Prior to excavation, the Contractor and Engineer shall agree on the exact location of the test pit based upon available mapping and the utility markout. The Contractor shall adjust the limits of excavation as needed to successfully locate the utility.

Horizontal and vertical locations and size and material of utilities must be obtained during test pit excavation and provided to the Engineer for review. Horizontal utility locations shall be field-surveyed or field-measured with a minimum of two (2) swing-ties from fixed physical features identified on the plans. Vertical utility elevations shall be field-surveyed using a level or other related equipment to provide elevation to the nearest hundredth of a foot (0.01’). The

Contractor is made aware that additional test pits may be required and the proposed design may be modified based on results of test pit information obtained.

“Earth Excavation” is considered a “Final Pay” item (i.e. the quantity will not be measured for payment but the quantity used for payment purposes will be that shown in the Bid Proposal.)

No changes to the quantity shown in the Bid Proposal will be made unless significant changes to the proposed grading are directed by the Engineer. In the case of significant grading changes directed by the Engineer, the quantity shown in the Bid Proposal shall be used as the baseline quantity and agreed measured changes shall be added or subtracted from the baseline quantity.

“Test Pit Excavation” shall be measured for payment by the cubic yard.

Trench excavation for culverts, drainage structures and infiltration units will not be measured for payment; its costs shall be considered as included in the cost for the appropriate item herein.

Excavation for sidewalk and sidewalk ramps will not be measured for payment; its costs shall be considered as included in the cost for the appropriate item herein.

TS-10

EXCAVATION

PAYMENT

Payment for “Earth Excavation” will be made at the contract unit price bid per cubic yard for each item subject to the method of measurement above. The prices shall constitute full compensation for all equipment, tools, and labor incidental to the completion of the excavation, the formation and compaction of embankments, the formation and compaction of subgrades, and the disposal of surplus or unsuitable material in accordance with these Specifications.

Payment for “Test Pit Excavation” will be made at the contract unit price bid per cubic yard for each item subject to the method of measurement above. The prices shall constitute full compensation for all equipment, tools, and labor incidental to the completion of the excavation and location of utilities as indicated herein, and the backfill and compaction of the excavation to restore the ground surface to the original condition in accordance with these Specifications.

Earth Excavation Cubic Yard

Test Pit Excavation Cubic Yard

TS-11

FORMATION OF SUBGRADE

FORMATION OF SUBGRADE

DESCRIPTION

“Formation of Subgrade” shall consist of the grading and compaction of the subgrade to the lines, grades and dimensions shown on the Plans or as directed by the Engineer.

Not applicable

Construction methods and compaction requirements shall conform to Section 2.09 of Form 817.

If unsuitable material is encountered during this work, it shall be excavated and replaced with granular fill and/or processed aggregate base to the depth and limits directed by the Engineer.

This additional work shall be measured and paid for as “Earth Excavation” , “Granular Fill” or

“Processed Aggregate Base” in accordance with these specifications.

“Formation of Subgrade” is considered a “Final Pay” item (i.e. the quantity will not be measured for payment but the quantity used for payment purposes will be that shown in the Bid

Proposal.) No changes to the quantity shown in the Bid Proposal will be made unless significant changes to the proposed limits are directed by the Engineer. In the case of significant changes to the proposed limits as directed by the Engineer, the quantity shown in the Bid Proposal shall be used as the baseline quantity and agreed measured changes shall be added or subtracted from the baseline quantity.

Formation and compaction of subgrade material for driveways and sidewalks will not be measured for payment, but its costs shall be considered as included in the unit prices for

“Driveway”, “Driveway Apron” or “Sidewalk” of the type specified.

Payment for “Formation of Subgrade” will be made at the contract unit price bid per square yard, which price shall constitute full compensation for all equipment, tools, and labor incidental to the completion of the formation and compaction of subgrades as specified herein.

Formation of Subgrade Square Yard

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PROCESSED AGGREGATE BASE

PROCESSED AGGREGATE BASE

DESCRIPTION

“Processed Aggregate Base” shall consist of furnishing and installing processed aggregate base within the parking lot reconstruction limits to bring the excavated base layer to the proposed subgrade elevations.

It shall also include furnishing and installing processed aggregate base as a foundation for concrete sidewalks and ramps, drainage structures and other items where shown on the Plans in accordance with these Specifications.

At the discretion of the Engineer, contractors shall supply copies of material test results, certified by an approved testing laboratory.

The materials for this work shall conform to the requirements of Section M.05.01, Processed

Aggregate Base and Pavement of Form 817.

Coarse aggregate shall be broken stone. Only one type of coarse aggregate shall be used on a project unless otherwise permitted by the Engineer.

Prior to placing the bottom coarse of the processed aggregate base, the prepared subbase shall be maintained true to line and grade. After the aggregate is spread, it shall be thoroughly compacted and bound by use of equipment approved by the Engineer. Water may be used during the compaction and binding operation.

When the bottom course has been completed, as specified above, the top course aggregate shall be spread over it to such thickness that, after final compaction and binding, the total thickness of the two courses will equal that thickness specified for the completed base. The top course shall be spread, compacted and bound exactly as specified above for the bottom course.

The final surface of the subbase course shall be fine graded so that, after final compaction and just prior to placement of base or pavement courses, the surface elevation shall not vary more than one-quarter inch above or below the design grade at any location. The surface shall be completed to the above tolerance and approved by the Engineer prior to any work at a given location to place an overlying course. If after approval, the course becomes displaced or disturbed in any way for any reason, the Contractor shall repair and regrade the damage to the satisfaction of the Engineer prior to placing the overlying course. All repaired sections shall be recompacted until they meet the requirements as stated herein.

“Processed Aggregate Base” used in the parking lot cross section at the direction of the Engineer will be measured for payment by the actual number of cubic yards of processed aggregate base installed and accepted.

TS-13

Processed aggregate base used under sidewalks, ramps or any other items where processed aggregate base is specified, will not be measured separately for payment, but its costs shall be included in the prices bid for the items which include this material.

When measured for payment, this work will be paid for at the contract unit price per cubic yard for "Processed Aggregate Base" complete in place, which price shall include all materials, equipment, tools and labor incidental thereto.

Processed Aggregate Base Cubic Yard

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BITUMINOUS CONCRETE (HOT MIX ASPHALT)

BITUMINOUS CONCRETE (HOT MIX ASPHALT)

DESCRIPTION

“Bituminous Concrete (Hot Mix Asphalt)”, hereafter referred to as HMA, of the type specified includes the furnishing and installation of a bituminous concrete constructed on a prepared processed aggregate base or existing pavement course in accordance with the lines, grades and depths shown on the Plans or as directed by the Engineer. It also includes furnishing quality control testing as required in the Specification.

All references to the “State” or “State Inspector” shall mean the Town of Manchester or the

Town of Manchester’s designated inspector.

HMA shall conform to the requirements of Section M.04 “Bituminous Concrete” of Form 818, latest edition.

Unless otherwise directed by the Engineer, Superpave Design Level 2 shall be used.

Temporary Overlay Markers: Temporary Overlay Markers shall be self-adhesive flexible reflective markers, color: yellow or white, of minimum size 4” x 4”.

HMA shall be installed in accordance with Section 4.06 “Bituminous Concrete” of Form 818, latest edition.

Core correlation density samples as described in Section 4.06.03.10 are required.

If less than 5,000 tons, the furnishing of a “Material Transfer Vehicle” as described in Section

4.06.03.3 will not be required.

Prior to opening any newly resurfaced lanes to traffic, whether base course or surface course, temporary overlay markers shall be installed accordingly to temporarily delineate existing or proposed lane lines. Reflective yellow markers shall be used to delineate centerline markings and reflective white markers shall be used to delineate lane line markings. Edge lines do not need to be temporarily marked. Reflectors shall be placed at 25’ spacing. Temporary markers shall be removed prior to installation of final pavement markings.

“HMA” of the type specified within the limits of roadway construction shall be measured for payment by the actual number of tons, complete and accepted in place.

Adjustments may be applied to bituminous concrete quantities and will be measured for payment using the formulas in Section 4.06.04.2.

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BITUMINOUS CONCRETE (HOT MIX ASPHALT)

BITUMINOUS CONCRETE (HOT MIX ASPHALT)

Material used for tack coat will not be measured separately for payment, but its cost shall be included in the unit price for “HMA” of the type specified.

Bituminous concrete for driveways and driveway aprons will not be measured for payment under this item; it shall be measured as specified in the item “Bituminous Concrete Driveway”.

The furnishing, installation, maintaining and removal of temporary overlay markers will not be measured for payment but shall be considered as included in the HMA items.

This work will be paid for at the contract unit price bid per ton for “HMA” of the type specified, which price shall constitute full compensation for all equipment, tools, labor and materials incidental thereto. No separate payment will be made for temporary overlay markers, tack coat or material transfer vehicle.

HMA S0.375 Ton

HMA S1.0 Ton

TS-16

ASPHALT ADJUSTMENT COST

ASPHALT ADJUSTMENT COST

DESCRIPTION

“Asphalt Adjustment Cost” will be based on the variance in price for the performance-graded binder component of hot mix asphalt (HMA), Polymer Modified Asphalt (PMA), and Ultra-Thin Bonded Hot-Mix Asphalt mixtures completed and accepted during the Contract in accordance with this Specification

METHOD

The Asphalt Price is available on the Department of Transportation web site at:

http://www.ct.gov/dot/asphaltadjustment

The adjustment shall not be considered as a changed condition in the contract because of this provision and because the Contractors are being notified before submission of bids.

An adjustment will only be made if the difference between the posted Asphalt Base Price and Asphalt Period Price varies by more than $5.00. Asphalt base price shall be defined as the asphalt base price that is posted on the DOT website 28 days before the actual posted bid opening date. Asphalt period price shall be the asphalt price that is posted on the DOT website for the period in which the HMA or PMA mixture is placed.

Regardless of the binder used in all HMA and/or PMA mixtures, the Asphalt Adjustment Cost will be based on PG 64-22.

The adjusted price shall be calculated based on the following formula:

where:

Performance-Graded Binder percentage (PG%)

1. For HMA or PMA mixes:

PG% = 4.5

For Superpave 1.5 inch (37.5mm), Superpave 1.0 inch (25.0mm), PMA S1, HMA S1, and Class 4

PG % = 5.0

For Superpave 0.50 inch (12.5mm), HMA S0.5, PMA S0.5, and Class 1

PG % = 6.0

For Superpave 0.375 inch (9.5mm), HMA S0.375, PMA S0.375, Superpave 0.25 inch (6.25mm), HMA S0.25, PMA S0.25, Superpave #4 (4.75mm) and Class 2

2. For Ultra-Thin Bonded HMA mixes:

Formula: HMA X [PG%/100] x [(Period Price - Base Price)] = $ ____

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ASPHALT ADJUSTMENT COST

ASPHALT ADJUSTMENT COST

PG% = Design % PGB (Performance Graded Binder) in the approved job mix formula, expressed as a percentage to one decimal point (e.g. 5.1%)

MEASUREMENT AND PAYMENT

“Asphalt Adjustment Cost” will be measured for payment in accordance with the method herein described. A payment will be made for an increase in costs or a deduction from monies due the Contractor will be made for a decrease in costs.

The sum of money shown on the estimate, and in the itemized proposal as "Estimated Cost", for this item will be considered the bid price although payment will be made as described above.

The estimated cost figure is not to be altered in any manner by the bidder. If the bidder should alter the amount shown, the altered figure will be disregarded and the original cost figure will be used to determine the amount of the bid for the Contract.

Asphalt Adjustment Cost Est.

TS-18

EXTRUDED CONCRETE CURB

EXTRUDED CONCRETE CURB

DESCRIPTION

“Extruded Concrete Curb” of the type specified includes the furnishing and installation of slip formed concrete curbing placed on a prepared bituminous concrete pavement in accordance with the dimensions and details shown on the Plans or as directed by the Engineer.

Concrete: Furnished concrete shall conform to Class “PCC04460” Concrete as specified in

Article M.03.02 of Form 818 or as modified herein with respect to composition, transportation, mixing and placing. Concrete shall contain a minimum of one pound of fiber reinforcement per cubic yard. All concrete shall be produced in accordance with ASTM C94 Ready Mixed

Concrete.

Adhesive: Adhesive shall be based upon the manufacturer’s recommendation for the intended installation.

Concrete shall be of such consistency that, after extrusion, it will maintain the shape of the curb section without support or slumping. It shall have a clean, uniform appearance, free from surface pits larger than 3/16” in diameter.

The pavement surface shall be thoroughly cleaned using high pressure washing, if necessary, prior to curb installation.

The curb shall be bonded to the base course of pavement with an approved concrete to asphalt adhesive or a two-component epoxy in accordance with the manufacturer’s instructions.

The top of the finished curb shall be true to line and shall follow the contour of the pavement.

Control joints shall be cut, as soon as possible, through one-third of the cross section of concrete.

The joint shall be tooled and finished to a neat and uniform appearance. Control joints shall be installed at nine foot (9’) intervals on tangent sections and three foot (3’) intervals on radii.

Where extruded concrete curb is shown to be installed over a concrete catch basin top, control joints shall be installed on each side of the catch basin top.

The finished curb shall be coated with a curing compound, designed to seal the surface and form a water proofing membrane to retard the loss of water from the fresh concrete.

After the completion of curbing, traffic shall be kept at a safe distance for a period of not less than 24 hours and until the curbing has set sufficiently to prevent damage to the work. Fill material shall be placed behind the curb immediately thereafter.

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EXTRUDED CONCRETE CURB

EXTRUDED CONCRETE CURB

MEASUREMENT

“Extruded Concrete Curb” of the type specified will be measured for payment along the top of the curb and will be the actual number of linear feet of extruded concrete curbing, completed and accepted.

The following will not be measured for payment, but shall be considered as included in the unit price bid for “Extruded Concrete Curb”:

1. Surface cleaning and preparation of existing bituminous concrete pavement

2. Adhesive

3. Curing compound

4. Control joints

Payment for this work will be made at the contract unit price per linear foot for “Extruded

Concrete Curb” of the type specified complete in place, which price shall include the removal and disposal of existing curb, the cleaning and surface preparation of existing bituminous concrete pavement, adhesive, curing compound, all materials, equipment, tools and labor

Extruded Concrete Curb Linear Foot

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CONCRETE SIDEWALK AND CONCRETE SIDEWALK RAMPS

CONCRETE SIDEWALKS AND CONCRETE SIDEWALK RAMPS

DESCRIPTION

“Concrete Sidewalk” of the thickness specified includes the construction of concrete sidewalk on a prepared processed aggregate base course in conformance with the lines, grades, dimensions and details as shown on the Plans, or as directed by the Engineer. It shall also include the sawcutting, removal and disposal of existing sidewalk, steps, ramps or pavement within the excavation limits for “Concrete Sidewalk”.

“Concrete Sidewalk and Curb Monolithic” of the thickness specified includes the construction of concrete curb and sidewalk, monolithically poured, on a prepared processed aggregate base course in conformance with the lines, grades, dimensions and details as shown on the Plans, or as directed by the Engineer. It shall also include the sawcutting, removal and disposal of existing sidewalk, steps, ramps or pavement within the excavation limits for “Concrete Sidewalk and

Curb Monolithic”.

“Reinforced Concrete Sidewalk” of the thickness specified includes the construction of concrete sidewalk reinforced with welded wire fabric on a prepared processed aggregate base course in conformance with the lines, grades, dimensions and details as shown on the Plans, or as directed by the Engineer. It shall also include the sawcutting, removal and disposal of existing sidewalk, steps, ramps or pavement within the excavation limits for “Reinforced Concrete Sidewalk”.

“Concrete Sidewalk Ramp” of the thickness specified includes the construction of a concrete ramp on a prepared processed aggregate base course in conformance with the lines, grades, dimensions and details as shown on the Plans, or as directed by the Engineer. It shall also include the sawcutting, removal and disposal of existing sidewalk, steps, ramps or pavement within the excavation limits and installation of Town-furnished detectable warning tiles for

“Concrete Sidewalk Ramp”.

1. Concrete

a. The concrete furnished shall conform in respects to composition, transportation, mixing and placing to Class “F” Concrete as specified in Section M.03 of Form

817 or as modified herein.

b. Test concrete in accordance with AASHTO or ASTM Standard Test Methods as listed herein.

c. All concrete mixes shall include air entraining and water reducing admixtures and, as needed, a retarder or accelerator. All admixtures must be on the

Connecticut DOT approved list.

d. Entrained air contents shall be maintained as follows:

Nominal Max Average Air

Aggregate Size Content

3/8" 7.5%

1/2" 7.0%

3/4" 6.0%

TS-21

CONCRETE SIDEWALKS AND CONCRETE SIDEWALK RAMPS

A range of ±1.5% from the required average is permissible for field tests.

Slump at the point of placement shall be 4" ±1".

e. No additional materials will be added to the concrete mix at the job site without the prior approval of the Engineer.

2. Reinforcing

a. Welded Wire Mesh: WWM shall be used in all driveways and specified sidewalk locations. The WWM shall be W1.4xW1.4 and conform to the latest AASHTO

M 55M/M 55 “Standard Specifications for Welded Steel Wire Fabric for Concrete

Reinforcement.”

Written requests may be made to substitute synthetic fibers such as Fibermesh or approved equal for welded wire mesh with written approval of the Engineer. The addition rate shall be 1.5 lb/cu yard.

b. Smooth Metal Dowels: Smooth metal dowels shall be ⅝" in diameter and 18 inches in length. All metal dowels shall conform to the requirements of

AASHTO M31-92, Grade 60.

c. Deformed Bars: Deformed bars shall conform to AASHTO M31-92, Grade 60.

d. Bond breaker shall be Reed Wax #100 Emulsion as manufactured by Roger A.

Reed, Inc., Reading, MA (1-781-944-4640) or approved equal.

3. Construction/Isolation Joint Material

Joint material shall be one-half (2) inch in thickness, equal in width to the slab thickness and conform to AASHTO M33, Asphaltic Expansion Joint Materials.

4. Forms

The forms used shall be straight and firmly supported and staked to the line and grades as shown on the plans or as directed by the Engineer. The forms shall be free from warp and shall be of sufficient strength to resist springing out of shape. All forms shall be cleaned and oiled before use.

5. Curing Materials

A liquid membrane curing compound such as Masterkure by Master Builders or approved equal and meeting AASHTO M148 shall be applied in accordance with the manufacturer’s instructions over the completed concrete surface area.

6. Processed Aggregate Base

Processed aggregate base shall conform to the requirements of “Processed Aggregate

Base” elsewhere in these Specifications.

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CONCRETE SIDEWALKS AND CONCRETE SIDEWALK RAMPS

7. Granite Stone Transition Curb

Granite stone transition curb and associated concrete and mortar shall conform to the requirements of “Granite Stone Curb” elsewhere in these Specifications.

8. Detectable Warning Tiles

Prefabricated detectable warning tiles will be furnished by the Town.

1. Excavation

Excavation, including the removal and disposal of any type of existing sidewalk, curb, ramp, steps or pavement, shall be made to the required depths below the finished grade as shown on the plans or as directed. All soft and yielding material shall be removed and replaced with suitable material.

2. Processed Aggregate Base

The base course shall be placed in layers not to exceed six inches (6”) in depth and to such a depth that after compaction it shall be at the specified depth below the finished grade of the walk.

3. Forms

Forms shall be straight, free from warp and of sufficient strength to resist springing from the pressure of the concrete. Forms shall be of minimum 5” depth and shall have a flat surface on the top. Forms shall be securely staked, braced and held firmly to the required line and grade and shall be sufficiently tight to prevent leakage of mortar. All forms shall be cleaned and oiled or wetted before concrete is placed against them. Sheet metal templates one-eighth (⅛) inch in thickness, of the full depth and width of the walk, shall be spaced at intervals of fifteen feet (15’) or as directed by the Engineer. If the concrete is placed in alternate sections, these templates shall remain in place until concrete has been placed on both sides of the template. As soon as the concrete has obtained its initial set, the templates shall be removed.

4. Joints

a. Construction Joints: At maximum intervals of thirty feet (30’), install a construction joint as detailed on the drawings. Install dowels as shown on the drawings. Minimum embedment on each side of the joints shall be six inches

(6”). All dowels shall be straight, square on the ends with no burrs. Locate 12” from the edge of the slab. Bars must be carefully aligned and square with the form face. Prevent bonding to the concrete on one side of the joint by using a plastic sleeve over the dowel or coat with an approved bond breaker. Alternate protected end on each side of the joints.

Dowels are also to be installed between new and existing concrete slabs. Where new or repaired walks abut existing concrete sidewalks, the contractor shall drill

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CONCRETE SIDEWALKS AND CONCRETE SIDEWALK RAMPS

holes measuring 3/4 of an inch in diameter and twelve (12) inches in depth at 24" on centers into the existing concrete slab. The dowels, dipped in a liquid asphalt and coated with an approved bond breaker or plastic sleeve shall be set into the existing sidewalk slab prior to the placement of concrete. The dowels are to be level with the latitude pitch of the sidewalk and shall conform to the details of these specifications. Any variations in dowel installation procedures must be approved by the Engineer.

Other locations to which dowels may be required will be directed by the Engineer.

b. Control Joints: Follow joint spacing as shown on the drawings. At intervals of approximately fifteen (15) feet, a full control joint shall be provided. A tooled joint, to the depth of 3/8 of an inch, shall be installed at approximately five (5) foot intervals along the sidewalk. The resulting areas should be as square as practical. All joints shall be installed using straight guides set at right angles to the longitudinal direction of the walk.

c. Isolation Joints will be installed wherever concrete is placed against already installed concrete of structures such a curbing, building, or other, previously existing paving.

If it becomes necessary to adjust the locations, horizontal or vertical dimensions of the above listed items due to interference with utilities or for other valid reasons, the

Contractor, with the approval of the Engineer, shall construct said items to the modified dimensions and locations.

5. Concrete Placement and Finishing

a. Subgrade preparation: The subgrade shall be approved by the Engineer prior to placement of concrete. The grade will be free of soft areas, roots, rubble and large stones. It shall be fully compacted and graded to provide the specified slab thickness within ±¼".

b. Forms: Align forms as shown on drawings and secure to provide straight edges and uniform curves. Remove only after the concrete has gained sufficient strength to prevent chipping or raveling of the edges.

c. Where required, install welded wire mesh. Support the mesh on concrete bricks or other supports so that it will remain in the upper third of the slab.

d. Moisten the subgrade before starting concrete placement to eliminate water loss.

e. Place continuously, using construction joints at locations shown on the drawings or as approved by the Engineer. If an interruption occurs of a duration that may cause a cold joint, install a construction joint as described in this specification.

f. Water may be added to the truck mixer to adjust the slump when the discharge begins, only if the concrete is below the specified water cement ratio and maximum slump upon arrival at the job site. Water shall not be added to the batch at any later time. If higher slumps are required, use a high range water reducer such as Rheobuild 1000 by Master Builders or equal as approved by the

Engineer.

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CONCRETE SIDEWALKS AND CONCRETE SIDEWALK RAMPS

g. Screed the concrete to grade, bull float or darbie, consolidate formed edges by spading with a hand float, and leave until edging can begin. Allow to harden sufficiently so that a foot leaves only a slight imprint. Floating should not begin until the water sheen has disappeared. The surface shall be worked and floated with a wooden, aluminum or magnesium float or finishing machine using float blades. The outside edges of the slab shall be edged with one-quarter (¼) inch radius tool. The slab shall then be broomed crosswise with a fine hair broom leaving the surface free from all tool marks.

h. Immediately upon the disappearance of the water sheen following the final finishing and before any marked dehydration or checking occurs, the curing compound shall be applied using an approved spraying device. The sprayer shall deliver a fine spray with uniform coverage. Coverage rate shall be that recommended by the curing compound manufacturer.

i. The Contractor shall have on the job, at all times, sufficient polyethylene film or waterproof paper to provide complete coverage in the event of rain. Protect the surface if rain occurs before final set or use for curing in the event of a breakdown of the spray equipment.

j. If rain falls on the newly coated sidewalk before the curing film has dried sufficiently to resist damage, or if the film is damaged in any other manner, the contractor shall reapply same. Treated surfaces shall be protected from all foot or vehicular traffic for a sufficient period of time to prevent damage.

k. Within 24 hours, spray curing compound on newly poured sidewalks.

6. Reinforcing

Reinforcing of the type specified shall be used in all concrete sidewalk ramps and at concrete sidewalks which cross driveways. Welded wire fabric for concrete reinforcement shall be embedded at mid-depth in the slab.

7. Detectable Warning Tile

All sidewalk ramps shall have detectable warning tiles as shown on the Plan or as directed by the Engineer. The detectable warning tile shall be set directly in poured concrete according to the Plans, the manufacturer’s specifications or as directed by the

Engineer. The Contractor shall place two 25 pound concrete blocks or sandbags on each tile to prevent the tile from floating after installation in wet concrete. Detectable warning tiles shall be furnished by the Town.

8. Special Conditions

a. Low Temperature Placements: No concrete is to be placed when air temperature is below 50°F unless additional precautions are taken and prior approval is given by the Engineer. The Engineer must approve all placements below 50°F. No concrete will be placed on frozen sub-grade or at temperatures below 20°F.

Concrete exposed to temperatures below 40°F after placement must be protected through the use of insulating blankets, a six (6) inch layer of straw that is

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CONCRETE SIDEWALKS AND CONCRETE SIDEWALK RAMPS

maintained in a dry condition by a covering of plastic sheeting, or other appropriate methods. Any concrete placed during cold weather that is damaged because of freezing shall be replaced at the Contractor’s own expense.

b. Special consideration for high temperature placements and rapid drying conditions should be discussed with the Engineer. No additional materials will be added to the concrete mix at the job site without the prior approval of the

Engineer.

c. Where reconstruction of an existing approach walk is required, the reconstructed portion of the approach walk shall match the existing approach walk in color, texture and appearance.

9. Curb Transitions

Curb transitions shall be provided when sidewalk ramps are adjacent to existing and proposed curb. Granite stone curb transitions shall be provided adjacent to granite curb and concrete curb transitions shall be provided adjacent to concrete curb and bituminous concrete curb unless approved otherwise by the Engineer.

10. Backfilling and Removal of Surplus Material

The sides of all finished concrete work shall be backfilled to the limits shown on the drawings or as directed by the Engineer, with suitable material thoroughly compacted and finished flush with the top of the concrete. All surplus material shall be removed and the site left in a neat and presentable condition to the satisfaction of the Engineer.

11. Protection

The Contractor shall protect newly poured concrete surfaces so as to prevent damage from falling objects, vandalism, etc. The Contractor shall repair or remove and replace any damaged or defaced concrete surface at his own expense. Determination to repair or remove and replace will be at the sole discretion of the Engineer.

12. Utility Adjustments

If an existing utility box, valve box or manhole is located within the limits of the new sidewalk or ramp, the Contractor shall be responsible for the coordination and scheduling with the owner of the facility, for the adjustment of the facility to grade, if necessary.

13. Signs

Unless otherwise shown on the Plan or directed by the Engineer, the Contractor shall remove existing signs located within the limits of the sidewalk or ramp construction, erect them on temporary support posts during the construction of new sidewalk or ramp, and reinstall them at their original location in a PVC sleeve set flush to the grade of the new sidewalk.

TS-26

CONCRETE SIDEWALKS AND CONCRETE SIDEWALK RAMPS

MEASUREMENT

“Concrete Sidewalk” will be measured by the actual number of square feet of completed and accepted concrete sidewalk of the thickness specified.

“Concrete Sidewalk and Curb Monolithic” will be measured by the actual number of square feet of completed and accepted concrete sidewalk of the thickness specified measured from face of curb to back of walk.

“Reinforced Concrete Sidewalk” will be measured by the actual number of square feet of completed and accepted reinforced concrete sidewalk of the thickness specified.

“Concrete Sidewalk Ramps” will be measured by the actual number of square feet of completed and accepted concrete ramps of the thickness specified.

The following items will not be measured separately for payment, but shall be considered as included in the unit price bid for “Concrete Sidewalk”, “Reinforced Concrete Sidewalk”, “Concrete Sidewalk and Curb Monolithic” or “Concrete Sidewalk Ramp” of the thickness specified:

1. Excavation and backfill;

2. Furnishing and…