HomeMy WebLinkAbout31-5000-Excavation-Support-And-Protection_Rev_1Dennis Yarmouth Intermediate Middle School January 19, 2021
Dennis Yarmouth Regional School District 100% Construction Documents
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31 5000 Excavation Support and Protection
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31 5000 Excavation Support and Protection
PART 1 - GENERAL
1.1 GENERAL PROVISIONS
A. Attention is directed to the CONTRACT AND GENERAL CONDITIONS and all Sections within
DIVISION 01 - GENERAL REQUIREMENTS which are hereby made a part of this Section of
the Specifications.
1.2 DESCRIPTION OF WORK
A. Work Included: Provide labor, materials, and equipment necessary to complete the work of this
Section, including but not limited to the following:
1. Temporary excavation support and protection systems.
B. Alternates: Not Applicable.
C. Items To Be Installed Only: Not Applicable.
D. Items To Be Furnished Only: Not Applicable.
E. Related Work: The following items are not included in this Section and will be performed under
the designated Sections: .
1. Section 31 2319 - DEWATERING for dewatering system for excavations.
2. Provision of waste management: Section 01 7419, Construction of Waste Management
Plan.
3. Provision of General LEED requirements and forms: 01 8113 Sustainable Design
Requirements.
1.3 PERFORMANCE REQUIREMENTS
A. Design, furnish, install, monitor, and maintain excavation support and protection system capable
of supporting excavation sidewalls and of resisting soil and hydrostatic pressure and
superimposed and construction loads.
1. Provide professional engineering services needed to assume engineering responsibility,
including preparation of Shop Drawings and a comprehensive engineering analysis by a qualified professional engineer registered in the Commonwealth of Massachusetts.
2. Prevent surface water from entering excavations by grading, dikes, or other means.
3. Install excavation support and protection systems without damaging existing buildings,
pavements, and other improvements adjacent to excavation.
4. Provide vibration monitoring to prevent impacts on adjacent structures and utilities.
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1.4 SUBMITTALS
A. Shop Drawings: Prepared by or under the supervision of a qualified professional engineer for
excavation support and protection systems.
1. Include Shop Drawings signed and sealed by the qualified professional engineer
responsible for their preparation.
B. Qualification Data: For Installer and professional engineer.
C. Photographs or videotape, sufficiently detailed, of existing conditions of adjoining construction
and site improvements that might be misconstrued as damage caused by the absence of, the
installation of, or the performance of excavation support and protection systems.
1.5 QUALITY ASSURANCE
A. Preinstallation Conference: Conduct conference at Project site to comply with requirements in
Division 01.
1. Review methods and procedures related to excavation support and protection system
including, but not limited to, the following:
a. Geotechnical report. b. Existing utilities and subsurface conditions.
c. Proposed excavations.
d. Proposed equipment.
e. Monitoring of excavation support and protection system.
f. Working area location and stability.
g. Coordination with waterproofing. h. Abandonment or removal of excavation support and protection system.
1.6 PROJECT CONDITIONS
A. Interruption of Existing Utilities: Do not interrupt any utility serving facilities occupied facilities
unless permitted under the following conditions and then only after arranging to provide
temporary utility according to requirements indicated:
1. Notify the Town of Yarmouth Project Manager no fewer than two days in advance of proposed interruption of utility.
2. Do not proceed with interruption of utility without The Town of Yarmouth Project
Manager’s written permission.
B. Project-Site Information: A geotechnical report has been prepared for this Project and is
available for information only. The opinions expressed in this report are those of geotechnical
engineer and represent interpretations of subsoil conditions, tests, and results of analyses conducted by geotechnical engineer. The Town of Yarmouth will not be responsible for
interpretations or conclusions drawn from the data.
1. Make additional test borings and conduct other exploratory operations necessary for
excavation support and protection.
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2. The geotechnical report is referenced elsewhere in the Project Manual.
C. Survey Work: Engage a qualified land surveyor or professional engineer to survey adjacent
existing buildings, structures, and site improvements; establish exact elevations at fixed points
to act as benchmarks. Clearly identify benchmarks and record existing elevations.
1. During installation of excavation support and protection systems, regularly resurvey
benchmarks, maintaining an accurate log of surveyed elevations and positions for
comparison with original elevations and positions. Promptly notify Designer if changes in
elevations or positions occur or if cracks, sags, or other damage is evident in adjacent
construction.
PART 2 - PRODUCTS
2.1 MATERIALS
A. General: Provide materials that are either new or in serviceable condition.
B. Structural Steel: ASTM A 36/A 36M, ASTM A 690/A 690M, or ASTM A 992/A 992M.
C. Steel Sheet Piling: ASTM A 328/A 328M, ASTM A 572/A 572M, or ASTM A 690/A 690M; with
continuous interlocks.
D. Cast-in-Place Concrete: ACI 301, of compressive strength required for application.
E. Reinforcing Bars: ASTM A 615/A 615M, Grade 60, deformed.
F. Timber Piling: ASTM D 25, species listed in AWPA C3, pressure-treated in accordance with
AWPA C3.
G. Seven Wire Strand: ASTM A 416, Grade 250 or 270., uncoated seven-wire, low-relaxation
strand.
H. Grout: Suitable for service, minimum 4,000 psi.
PART 3 - EXECUTION
3.1 PREPARATION
A. Protect structures, utilities, sidewalks, pavements, and other facilities from damage caused by
settlement, lateral movement, undermining, washout, and other hazards that could develop
during excavation support and protection system operations.
1. Shore, support, and protect utilities encountered.
B. Install excavation support and protection systems to ensure minimum interference with roads,
streets, walks, and other adjacent occupied and used facilities.
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1. Do not close or obstruct streets, walks, or other adjacent occupied or used facilities
without permission from the Town of Yarmouth Project Manager and authorities having
jurisdiction. Provide alternate routes around closed or obstructed traffic ways if required
by authorities having jurisdiction.
C. Locate excavation support and protection systems clear of permanent construction so that
forming and finishing of concrete surfaces are not impeded.
D. Monitor excavation support and protection systems daily during excavation progress and for as
long as excavation remains open. Promptly correct bulges, breakage, or other evidence of
movement to ensure that excavation support and protection systems remain stable.
E. Promptly repair damages to adjacent facilities caused by installing excavation support and
protection systems.
3.2 SOLDIER BEAMS AND LAGGING
A. Install steel soldier beams before starting excavation. Space soldier beams at regular intervals
not to exceed allowable flexural strength of wood lagging. Accurately align exposed faces of
flanges to vary not more than 2 inches from a horizontal line and not more than 1:120 out of vertical alignment.
B. Install wales horizontally at spacings indicated on the approved shop drawings and secure to
soldier beams.
3.3 SHEET PILING
A. Before starting excavation, install one-piece sheet piling lengths and tightly interlock to form a
continuous barrier. Limit vertical offset of adjacent sheet piling to 60 inches. Accurately align exposed faces of sheet piling to vary not more than 2 inches from a horizontal line and not more
than 1:120 out of vertical alignment. Cut tops of sheet piling to uniform elevation at top of
excavation.
3.4 TIEBACKS
A. Tiebacks: Drill for, install, grout, and tension tiebacks into position. Test load-carrying capacity
of each tieback and replace and retest deficient tiebacks.
1. Test loading shall be observed by a qualified professional engineer responsible for
design of excavation support and protection system.
2. Maintain tiebacks in place until permanent construction is able to withstand lateral earth
and hydrostatic pressures.
3. Inspect tiebacks periodically to confirm anchors exhibit no movement.
3.5 BRACING
A. Bracing: Locate bracing to clear columns, floor framing construction, and other permanent
work. If necessary, to move brace, install new bracing before removing original brace.
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1. Do not place bracing where it will be cast into or included in permanent concrete work,
unless otherwise approved by Engineer.
2. Install internal bracing, if required, to prevent spreading or distortion of braced frames.
3. Maintain bracing until structural elements are supported by other bracing or until
permanent construction is able to withstand lateral earth and hydrostatic pressures.
3.6 REMOVAL AND REPAIRS
A. Remove excavation support and protection systems when construction has progressed
sufficiently to support excavation and bear soil and hydrostatic pressures. Remove in stages to
avoid disturbing underlying soils or damaging structures, pavements, facilities, and utilities.
1. Remove excavation support and protection systems to a minimum depth of 48 inches
below overlaying construction and abandon remainder.
2. Fill voids immediately with approved backfill compacted to density specified in Section 31
2000 - EARTH WORK or 31 0000 – EARTH MOVING, as applicable.
3. Repair or replace, as approved by Engineer, adjacent work damaged or displaced by
removing excavation support and protection systems.
END SECTION
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31 1216 Asphalt Paving
PART 1 - GENERAL
1.1 GENERAL PROVISIONS
A. Attention is directed to the CONTRACT AND GENERAL CONDITIONS and all Sections within
DIVISION 01 - GENERAL REQUIREMENTS which are hereby made a part of this Section of
the Specifications.
1.2 DESCRIPTION OF WORK
A. Work Included: Provide labor, materials, and equipment necessary to complete the work of this
Section, including but not limited to the following:
1. Hot-mix asphalt paving, including walkways, ramps, and curbs.
2. Hot-mix asphalt patching.
3. Pavement-marking paint.
B. Alternates: Not Applicable.
C. Items To Be Installed Only: Not Applicable.
D. Items To Be Furnished Only: Not Applicable.
E. Related Sections: The following items are not included in this Section is included for reference only and shall not be presumed to be complete:
1. Section 31 0000 - EARTH MOVING for aggregate subbase and base courses and for
aggregate pavement shoulders.
2. Section 01 7419, Construction Waste Management Plan.
3. Section 01 8113 Sustainable Design Requirements.
1.3 SUBMITTALS
A. Product Data: For each type of product indicated. Include technical data and tested physical
and performance properties.
1. Job-Mix Designs: Certification, by authorities having jurisdiction, of approval of each job
mix proposed for the Work.
B. Shop Drawings: Indicate pavement markings, lane separations, and defined parking spaces.
Indicate, with international symbol of accessibility, spaces allocated for people with disabilities.
C. Material Certificates: For each paving material, from manufacturer.
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1.4 QUALITY ASSURANCE
A. Manufacturer Qualifications: A paving-mix manufacturer registered with and approved by the
Massachusetts Highway Department (MHD).
B. Regulatory Requirements: Comply with materials, workmanship, and other applicable
requirements of the Massachusetts Highway Department (MHD) for hot mix asphalt paving
work.
1. Comply with requirements of the Massachusetts Highway Department (MHD) Standard
Specifications for Highways and Bridges, including supplemental specifications and
special provisions.
2. Comply with requirements of the Americans with Disabilities Act (ADA) and the
Massachusetts Architectural Access Board (MAAB). If these requirements cannot be met
with the grades and slopes indicated on the plans, notify the Designer immediately.
3. Comply with requirements of the local authority having jurisdiction concerning the location
and construction of accessible curb cuts.
C. Preinstallation Conference: Conduct conference at Project site to comply with requirements in
Division 01.
1. Review methods and procedures related to hot-mix asphalt paving including, but not
limited to, the following:
a. Review proposed sources of paving materials, including capabilities and location of
plant that will manufacture hot-mix asphalt. b. Review condition of subgrade and preparatory work.
c. Review requirements for protecting paving work, including restriction of traffic
during installation period and for remainder of construction period.
d. Review and finalize construction schedule and verify availability of materials,
Installer's personnel, equipment, and facilities needed to make progress and avoid
delays.
1.5 DELIVERY, STORAGE, AND HANDLING
A. Deliver pavement-marking materials to Project site in original packages with seals unbroken
and bearing manufacturer's labels containing brand name and type of material, date of
manufacture, and directions for storage.
B. Store pavement-marking materials in a clean, dry, protected location within temperature range
required by manufacturer. Protect stored materials from direct sunlight.
1.6 PROJECT CONDITIONS
A. Traffic Control: Maintain access for vehicular and pedestrian traffic as required for other
construction activities.
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B. Environmental Limitations: Do not apply asphalt materials if subgrade is wet or excessively
damp, if rain is imminent or expected before time required for adequate cure, or if the following
conditions are not met:
1. Tack Coat: Minimum surface temperature of 60 deg F.
2. Asphalt Base Course: Minimum surface temperature of 40 deg F and rising at time of
placement.
3. Asphalt Surface Course: Minimum surface temperature of 60 deg F at time of placement.
C. Pavement-Marking Paint: Proceed with pavement marking only on clean, dry surfaces and at a
minimum ambient or surface temperature of 55 deg F for water-based materials, and not
exceeding 95 deg F.
PART 2 - PRODUCTS
2.1 AGGREGATES
A. Coarse Aggregate: ASTM D 692, sound; angular crushed stone, crushed gravel, or cured,
crushed blast-furnace slag.
B. Fine Aggregate: ASTM D 1073 or AASHTO M 29, sharp-edged natural sand or sand prepared
from stone, gravel, cured blast-furnace slag, or combinations thereof.
C. Mineral Filler: ASTM D 242 or AASHTO M 17, rock or slag dust, hydraulic cement, or other
inert material.
D. Reclaimed Asphalt Pavement (RAP): Provide material obtained from the highways or streets by
crushing, milling, or planing existing hot mix asphalt pavements.
1. The proportion of RAP to virgin aggregate for base course mixtures and intermediate
course mixtures shall be limited to a maximum of 40% for drum mix plants and 20% for modified batch plants. The maximum amount of RAP for surface course mixtures shall
be 10%.
2.2 ASPHALT MATERIALS
A. Asphalt Binder Performance Graded: AASHTO M320 or AASHTO MP 1a, performance grade
as required by MHD Specifications.
B. Tack Coat: AASHTO M 140 emulsified asphalt, or AASHTO M 208 cationic emulsified asphalt, slow setting, diluted in water, of suitable grade and consistency for application.
2.3 AUXILIARY MATERIALS
A. Herbicide: Commercial chemical for weed control, registered by the EPA. Provide in granular,
liquid, or wettable powder form.
B. Pavement-Marking Paint: Acrylic/latex type, low VOC, traffic marking paint.
1. Color: As indicated.
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C. Wheel Stops: Precast, air-entrained concrete, 2500-psi minimum compressive strength, 4-1/2
inches high by 9 inches wide by 72 inches long. Provide chamfered corners, drainage slots on
underside, and holes for anchoring to substrate.
1. Dowels: Galvanized steel, 3/4-inch diameter, 10-inch minimum length.
2.4 ASPHALT MIXES
A. Hot-Mix Asphalt: Dense, hot-laid, hot-mix asphalt plant mixes approved by MHD Specifications
and designed according to procedures in AI MS-2, "Mix Design Methods for Asphalt Concrete
and Other Hot-Mix Types".
PART 3 - EXECUTION
3.1 EXAMINATION
A. Examine exposed subgrades and subbase surfaces for compliance with requirements for
dimensional, grading, and elevation tolerances.
B. Proof-roll subgrade below pavements with heavy pneumatic-tired equipment to identify soft
pockets and areas of excess yielding. Do not proof-roll wet or saturated subgrades.
C. Proceed with paving only after unsatisfactory conditions have been corrected.
3.2 COLD MILLING
A. Clean existing pavement surface of loose and deleterious material immediately before cold
milling. Remove existing asphalt pavement by cold milling to grades and cross sections
indicated.
3.3 PATCHING
A. Existing Hot-Mix Asphalt Pavement: Saw cut perimeter of patch and excavate existing
pavement section to sound base. Excavate rectangular or trapezoidal patches, extending 12 inches into adjacent sound pavement, unless otherwise indicated. Cut excavation faces
vertically. Remove excavated material. Recompact existing unbound-aggregate base course
to form new subgrade.
B. Existing Portland Cement Concrete Pavement: Break cracked slabs and roll as required to
reseat concrete pieces firmly.
1. Remove disintegrated or badly cracked pavement. Excavate rectangular or trapezoidal patches, extending into adjacent sound pavement, unless otherwise indicated. Cut
excavation faces vertically. Recompact existing unbound-aggregate base course to form
new subgrade.
C. Tack Coat: Apply uniformly to vertical surfaces abutting or projecting into new, hot-mix asphalt
paving at a minimum rate of 0.05 to 0.15 gal./sq. yd.
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1. Allow tack coat to cure undisturbed before applying hot-mix asphalt paving.
2. Avoid smearing or staining adjoining surfaces, appurtenances, and surroundings.
Remove spillages and clean affected surfaces.
D. Patching: Fill excavated pavements with hot-mix asphalt base mix for full thickness of patch
and, while still hot, compact flush with adjacent surface.
3.4 SURFACE PREPARATION
A. General: Immediately before placing asphalt materials, remove loose and deleterious material
from substrate surfaces. Ensure that prepared subgrade is ready to receive paving.
B. Herbicide Treatment: Apply herbicide according to manufacturer's recommended rates and
written application instructions. Apply to dry, prepared subgrade or surface of compacted-
aggregate base before applying paving materials.
C. Tack Coat: Apply uniformly to surfaces of existing pavement at a rate of 0.05 to 0.15 gal./sq.
yd..
1. Allow tack coat to cure undisturbed before applying hot-mix asphalt paving.
2. Avoid smearing or staining adjoining surfaces, appurtenances, and surroundings.
Remove spillages and clean affected surfaces.
3.5 HOT-MIX ASPHALT PLACING
A. Machine place hot-mix asphalt on prepared surface, spread uniformly, and strike off. Place
asphalt mix by hand to areas inaccessible to equipment in a manner that prevents segregation
of mix. Place each course to required grade, cross section, and thickness when compacted.
1. Spread mix at minimum temperature of 250 deg F.
2. Regulate paver machine speed to obtain smooth, continuous surface free of pulls and tears in asphalt-paving mat.
B. Place paving in consecutive strips not less than 10 feet wide unless infill edge strips of a lesser
width are required.
C. Promptly correct surface irregularities in paving course behind paver. Use suitable hand tools
to remove excess material forming high spots. Fill depressions with hot-mix asphalt to prevent
segregation of mix; use suitable hand tools to smooth surface.
3.6 JOINTS
A. Construct joints to ensure a continuous bond between adjoining paving sections. Construct
joints free of depressions, with same texture and smoothness as other sections of hot-mix
asphalt course.
1. Clean contact surfaces and apply tack coat to joints.
2. Offset longitudinal joints, in successive courses, a minimum of 6 inches. 3. Offset transverse joints, in successive courses, a minimum of 24 inches.
4. Construct transverse joints at each point where paver ends a day's work and resumes
work at a subsequent time. Construct these joints using either "bulkhead" or "papered"
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method according to AI MS-22, for both "Ending a Lane" and "Resumption of Paving
Operations."
3.7 COMPACTION
A. General: Begin compaction as soon as placed hot-mix paving will bear roller weight without
excessive displacement. Compact hot-mix paving with hot, hand tampers or with vibratory-plate
compactors in areas inaccessible to rollers.
1. Complete compaction before mix temperature cools to 185 deg F.
B. Breakdown Rolling: Complete breakdown or initial rolling immediately after rolling joints and
outside edge. Examine surface immediately after breakdown rolling for indicated crown, grade,
and smoothness. Correct laydown and rolling operations to comply with requirements.
C. Intermediate Rolling: Begin intermediate rolling immediately after breakdown rolling while hot-
mix asphalt is still hot enough to achieve specified density. Continue rolling until hot-mix
asphalt course has been uniformly compacted to the following density:
1. Average Density: ASTM D 2041, per MHD Specifications.
D. Finish Rolling: Finish roll paved surfaces to remove roller marks while hot-mix asphalt is still
warm.
E. Edge Shaping: While surface is being compacted and finished, trim edges of pavement to
proper alignment. Bevel edges while asphalt is still hot; compact thoroughly.
F. Protection: After final rolling, do not permit vehicular traffic on pavement until it has cooled and
hardened.
G. Erect barricades to protect paving from traffic until mixture has cooled enough not to become
marked.
3.8 ASPHALT CURBS
A. Construct hot-mix asphalt curbs over compacted pavement surfaces. Apply a light tack coat
unless pavement surface is still tacky and free from dust. Spread mix at minimum temperature
of 250 deg F.
1. Asphalt Mix: Same as pavement surface-course mix.
B. Place hot-mix asphalt to curb cross section indicated or, if not indicated, to local standard shapes, by machine or by hand in wood or metal forms. Tamp hand-placed materials and
screed to smooth finish. Remove forms after hot-mix asphalt has cooled.
3.9 INSTALLATION TOLERANCES
A. Accessibility: Comply with requirements of Massachusetts Architectural Access Board and
ADAAG requirements. Remove and replace paving that does not meet required tolerances,
when measured with a 2 foot straightedge.
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B. Pavement Thickness: Compact each course to produce the thickness indicated within the
following tolerances:
1. Base Course: Plus, or minus 1/2 inch.
2. Surface Course: Plus 1/4 inch, no minus.
C. Pavement Surface Smoothness: Compact each course to produce a surface smoothness
within MHD Specification tolerances as determined by using a 10-foot straightedge applied
transversely or longitudinally to paved areas.
3.10 PAVEMENT MARKING
A. Do not apply pavement-marking paint until layout, colors, and placement have been verified
with Designer.
B. Allow paving to age for a minimum of 30 days before starting pavement marking.
C. Sweep and clean surface to eliminate loose material and dust.
D. Apply paint with mechanical equipment to produce pavement markings, of dimensions
indicated, with uniform, straight edges. Apply at manufacturer's recommended rates to provide
a minimum wet film thickness of 15 mils.
3.11 WHEEL STOPS
A. Securely attach wheel stops to pavement with not less than two galvanized-steel dowels
embedded at one-quarter to one-third points. Securely install dowels into pavement and bond
to wheel stop. Recess head of dowel beneath top of wheel stop.
3.12 FIELD QUALITY CONTROL
A. Independent Testing Agency: Cooperate with the Independent Testing Agency engaged by
Town of Yarmouth for field quality control activities for the Work of this Section. Refer also to Section 01 4325 - TESTING AGENCY SERVICES.
B. Test the plane of the finished surfaces of base, binder, and surface courses with a 16-foot
straightedge, except use a 10-foot straightedge on vertical courses and on the top course of
resurfaced streets which contain manhole covers, valve boxes, and the like.
C. Carefully apply the straightedge immediately after the first compaction by rolling, and from then
on as may be necessary until and after the final compaction of the material in place. Hold the straightedge in successive positions parallel to the road centerline and in contact with the road
surface; check the entire area from one side of the pavement to the other.
D. Correct irregularities which vary 3/8 inch from a true finished surface in base and binder
courses, and 1/4 inch in top courses.
E. Irregularities which may develop before the completion of rolling and while the material is still
workable, may be remedied by loosening the surface mixture and removing or adding material as necessary. Should any unsatisfactory irregularities or defects remain after final compaction,
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correct the defective work by removing and replacing with new material to form a true and even
surface.
3.13 OPENING TO TRAFFIC
A. No vehicular traffic or loads shall be permitted on the newly completed pavement until adequate
stability has been attained, and the material has cooled sufficiently to prevent distortion or loss
of fines, and the pavement has achieved a maximum temperature of 140 degrees F.
B. If the climatic or other conditions warrant it, the period of time before opening to traffic may be
extended at the discretion of the Architect.
3.14 DISPOSAL
A. Except for material indicated to be recycled, remove excavated materials from Project site and
legally dispose of them in an EPA-approved landfill.
END SECTION
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