Search

SECTION 02451

FLAGGERS AND UNIFORMED OFFICERS FOR TRAFFIC CONTROL

PART 1-GENERAL

1.01

A.

1.02

1.03

A.

WORK INCLUDED:
This Section covers the provisions for furnishing Flaggers and Uniformed Police Officers
for Traffic Control and Maintenance of Traffic as described in Section 01110 CONTROL
OF WORK AND MATERIALS, to direct traffic through or around work as shown on the plans
or as ordered by the Engineer.

DESCRIPTION:
The Contractor shall coordinate with the Engineer to determine the number of Flaggers
and Officers deemed necessary to provide for public safety and to maintain a smooth flow
of traffic through the construction area(s) affected.

RELATED WORK:

SECTION 01110, CONTROL OF WORK AND MATERIALS

PART 2 - PRODUCTS

2.01

A.

UNIFORMED POLICE OFFICERS:

Contractor shall provide the Traffic Control Officer with a minimum of 24 hours notice
indicating the time of day, street location and confirm number of officers required for
traffic control. This shall be as agreed by the Engineer. The Contractor may furnish
additional traffic control personnel at his/her own expenses but only those agreed upon by
the Engineer will be measured for payment.

Contractor shall give the Traffic Control Officer a minimum of 2 hours prior cancellation
notice should Contractor determine that due to weather or conditions beyond his control he
would not need the scheduled officers.

Contractor shall pay for officer(s) at the prevailing rate established by the local police
department should officers not be needed and the Contractor fails to cancel the officers as
noted in 2.01.B above.

2019 CIPP Lining Project Flaggers and Uniformed Officers for Traffic Control
Nashua, NH 02451-1

D. Where the Owner is paying directly for Uniformed Officers, the Contractor shall be
responsible for payment of the wages paid to the Uniformed Police Officers if the Contractor
fails to cancel the services of the Uniformed Officers in accordance with 2.01.B and
2.01.C above.

PART 3 - EXECUTION
3.01 OPERATION:
A. Contractor shall provide barricades, barrier fences, traffic signs, and other traffic control
devices as shown on the plans, required by the City’s Traffic Department, or as directed by

the Engineer, to protect traffic, pedestrians, and animals from the work area.

B. Contractor shall relocate barricades, signs and other devices as necessary as the work
progresses as directed by the Owner’s Traffic Control Officer or the Engineer.

C. Flaggers shall be provided with the necessary safety equipment.

END OF SECTION

2019 CIPP Lining Project Flaggers and Uniformed Officers for Traffic Control
Nashua, NH 02451-2

SECTION 02530
BUILDING CONNECTIONS AND DROP CONNECTIONS
PART 1 - GENERAL
1.01 WORK INCLUDED:

A. This Section covers furnishing of all materials and labor to construct building sewer
connections and drop connections as indicated on the Drawings, and as herein specified.

B. _ Final location of building connections shall be determined in the field by the Engineer.
1.02 RELATED WORK:

A. Section 02300, EARTHWORK

B. Section 02631, PRECAST MANHOLES

C. Section 02085, POLYVINYL CHLORIDE GRAVITY PIPE AND FITTINGS

1.03 SUBMITTALS: IN ACCORDANCE WITH REQUIREMENTS OF GENERAL
SPECIFICATIONS, SUBMIT THE FOLLOWING:

A. Six sets of shop drawings and manufacturers literature of the materials of this section shall be
submitted to the Engineer for review.

B. Shop drawings of any special connections, including the proposed adapters for service
connections, shall be submitted to the Engineer.

PART 2— PRODUCTS
2.01 MATERIALS:

A. Pipe and fittings for drop connections and for gravity building connections shall be as
specified under Section 02085 POLYVINYL CHLORIDE GRAVITY PIPE AND
FITTINGS. Adaptors shall be as recommended by the pipe manufacturer.

B. Concrete for encasement shall be as specified in Section 03302 FIELD CONCRETE.

PART 3 - EXECUTION

3.01 INSTALLATION:

A. BUILDING CONNECTIONS:

2019 CIPP Lining Project Building Connections and Drop Connections
Nashua, NH 02530-1

1. Building connections shall be installed using the same construction and pipe joining
techniques as specified in Section 02085 POLYVINYL CHLORIDE GRAVITY PIPE
AND FITTINGS.

2. In general, connections shall be carried only to the property line. The end of the pipes
shall be closed with PVC stoppers jointed in place to ensure against infiltration into the
sewer line.

3. In general, the mainline sewer has been designed at depths to accommodate full
basement service for each building to be connected. Building connections must be
installed at the proper depth in every case that full basement service is possible for the
building. The CONTRACTOR will be required to excavate, remove, reinstall and
backfill any building connection improperly installed at his own expense. The
CONTRACTOR will demonstrate to the Inspector that all connections are properly
made.

4. In streets where building sewers must cross water mains, the CONTRACTOR will
install the building sewers at proper depths to maintain the vertical clearance between
the two pipes, as shown in the construction details. Building services shall be installed
beneath water mains.

B. DROP CONNECTIONS:

1. When the invert of a pipe entering a manhole is 24 inches or more above the invert of
the lowest pipe leaving the manhole, it shall be connected to the manhole with an
inside drop section.

2. The drop pipe shall be the same diameter, material, and class as the sewer pipe
entering the manhole, unless otherwise noted in the drawings. The drop connection
shall be constructed as shown on the City of Nashua Standard details.

3. All connecting hardware shall be stainless steel.

END OF SECTION

2019 CIPP Lining Project Building Connections and Drop Connections
Nashua, NH 02530-2

SECTION 02631
PRECAST MANHOLES
PART 1 - GENERAL
1.01 WORK INCLUDED:

A. This Section covers all precast sewer manholes complete, including, but not limited to,
bases, walls, cones, mortar, inverts, frames and covers.

B. Work shall comply with City of Nashua Standard Specifications for Sewers and Drains,
which are hereby incorporated by reference.

1.02 RELATED WORK:

A. Section 02300, EARTHWORK.

B. Section 02745, ROAD RESTORATION
1.03 SYSTEM DESCRIPTION:

A. Precast sections shall conform in shape, size, dimensions, materials, and other respects to the
details indicated on the drawings or as ordered by the Engineer.

B. All manholes shall have concrete bases. Concrete bases shall be precast unless otherwise
specified. Invert channels shall be formed of brick and mortar upon the base.

C. Riser and cone sections shall be precast concrete.

1.04 REFERENCES:
A. The following standards form a part of this specification as referenced:

American Society for Testing and Materials (ASTM)

ASTM A48 Gray Iron Castings
ASTM C32 Sewer and Manhole Brick
ASTM C144 Aggregate for Masonry Mortar
ASTM C207 Hydrated Lime for Masonry Purposes
ASTM C478 Precast Reinforced Concrete Manhole Sections
ASTM (C923 Specification for Resilient
2019 CIPP Lining Project Precast Manholes

Nashua, NH 02631-1

Connectors Between Reinforced Concrete
Manhole Structures and Pipes

ASTM C1244 Standard Test Method for Concrete Sewer Manholes by the

Negative Air Pressure (Vacuum) Test.

American Association of State Highway and Transportation Officials (AASHTO)
AASHTO M198Joints for Circular Concrete Sewer and Culvert Pipe Using
Flexible Watertight Gaskets
Occupational Safety and Health Administration OSHA 29 CFR 1910.27
Fall Prevention Protection

1.05 SUBMITTALS: IN ACCORDANCE WITH REQUIREMENTS OF GENERAL
SPECIFICATIONS, SUBMIT THE FOLLOWING:

A. — Six sets of manufacturer literature of the materials of this section shall be submitted to the
Engineer for review.

B. _ Tests reports as required shall be submitted to the Engineer.
PART 2 - PRODUCTS 2.01. PRECAST CONCRETE SECTIONS:

A. All precast concrete sections shall conform to ASTM C478 with the following exceptions
and additional requirements:

1. | The wall thickness of precast sections shall be as designated on the drawings,
meeting the following minimum requirements:

Section Diameter (Inches) Minimum Wall Thickness (Inches)
48 5
60 6
T2 7
84 8

2. Type II cement shall be used except as otherwise approved.

3. Sections shall be steam cured and shall not be shipped until at least five days after
having been cast.

4, Minimum compressive strength of concrete shall be 4000 psi at 28 days.

2019 CIPP Lining Project Precast Manholes
Nashua, NH 02631-2

5. No more than two lift holes may be cast or drilled in each section.

6. The date of manufacture and the name or trademark of the manufacturer shall be
clearly marked on the inside of each precast section.

7. Acceptance of the sections will be on the basis of material tests and inspection of the
completed product.

8. Circumferential steel reinforcement in walls and bases shall be a minimum of 0.12 sq.
in/lin. ft. for 4-foot diameter sections and 0.15 sq. in/lin. ft. for 5- and 6-foot
diameter sections. Reinforcing shall extend into tongue and groove.

B. Conical reducing sections shall have a wall thickness not less than 5-inches at the bottom
and wall thickness of 8-inches at the top. Conical sections shall taper from a minimum of 48-
inches diameter to 30-inches diameter at the top, as shown on the drawings.

C. Except where insufficient depth of cover dictates the use of a shorter base, bases shall be a
minimum of 4 feet in height.

D. Slab top sections and flat riser sections (Grade Rings) shall conform to the contract
drawings, with particular attention focused upon the reinforcing steel and be designed to
meet or exceed an H-20 Loading requirement.

E. The tops of the bases shall be suitably shaped by means of accurate ring forms to receive the
riser sections.

F. __ Precast sections shall be manufactured to contain wall openings of the minimum size to
receive the ends of the pipes, such openings being accurately set to conform with line and
grade of the sewer or drain. Subsequent cutting or tampering in the field, for the purpose of
creating new openings or altering existing openings, will not be permitted except as
directed by the Engineer.

G. —_"Drop-over" manholes shall be placed where indicated on the drawings. The Contractor
shall accurately measure the diameter of the existing outlet pipe and inform the
manufacturer of its size, so that the "Drop-over" type opening can be cut into the precast
manhole base. The bottom shall be cast in place by the Contractor in accordance with
Section 03302, FIELD CONCRETE. The invert channel shall be formed of brick and
mortar, as specified in this specifications section. The sub-base shall be a compacted, level
foundation of crushed stone, at least 6-inches thick, as specified in Section 02300
EARTHWORK, but shall vary to the depth necessary to reach sound undisturbed earth.

H. deleted

I. The Engineer reserves the right to reject any unsatisfactory precast section and the rejected
unit shall be tagged and removed from the job site immediately.

J. The Engineer may also require the testing of concrete sections as outlined under Physical

2019 CIPP Lining Project Precast Manholes
Nashua, NH 02631-3

Requirements in ASTM C478 with the Contractor bearing all testing costs.

2.02 BRICK MATERIALS:

A. _ Brick shall be sound, hard, and uniformly burned brick, regular and uniform in shape and
size, of compact texture, and satisfactory to the Engineer. Bricks shall comply with ASTM
C32, for Grade SS, hard brick, except that the mean of five tests for absorption shall not
exceed 8 percent by weight.

B. Rejected brick shall be immediately removed from the work and brick satisfactory to the
Engineer substituted.

C. Mortar shall be composed of portland cement, hydrated lime, and sand in which the volume
of sand shall not exceed three times the sum of the volumes of cement and lime. The
proportions of cement and lime shall be as directed and may vary from 1:1/4 for dense
hard-burned brick to 1:3/4 for softer brick. In general, mortar for Grade SS Brick shall be
mixed in the volume proportions of 1:1/2:4-1/2; portland cement to hydrated lime to sand.

D. Cement shall be Type II portland cement as specified for concrete masonry.

E. Hydrated lime shall be Type S conforming to ASTM C207.

F, The sand shall comply with ASTM C144 specifications for "Fine Aggregate," except that all
of the sand shall pass a No. 8 sieve.

2.03 FRAMES, GRATES AND COVERS:

A. Castings shall be of good quality, strong, tough, even-grained cast iron, smooth, free from
scale, lumps, blisters, sandholes, and defects of every nature which would render them unfit for
the service for which they are intended. Contact surfaces of covers and frame seats shall
be machined to prevent rocking of covers.

B. All castings shall be thoroughly cleaned and may be subject to a careful hammer inspection at
the Engineer's discretion.

C. Castings shall be ASTM A48 Class 30B or better.

D. The surface of the manhole covers shall have a diamond pattern with the cast words
"SEWER".

E. Manhole frames with 32-inch covers for 30-inch openings shall be 500 pounds minimum by
E.L. LeBaron Foundary Co., No. LC328; Quality Water Products, Style 47; Neenah
Foundry Co., R1740B or approved equal.

2019 CIPP Lining Project Precast Manholes

Nashua, NH 02631-4

SEWER MANHOLE ACCESSORIES:

A. Gasket materials shall be top grade (100% solids, vulcanized) butyl rubber and shall meet or
exceed AASHTO M-198.

B. Couplings at the manhole-pipe interface shall be made with a rubber seal system (with or
without stainless steel straps) meeting the requirements of ASTM C923 and recommended
for this type of connection.

C. — Stubs installed as specified and indicated on the drawings shall be short pieces of the same
class pipe as that entering the manhole and shall have either stoppers or end caps as shown on
the drawings. Stoppers or end caps shall be especially designed for that application.

PART 3 - EXECUTION
3.01 INSTALLATION:

A. PRECAST SECTIONS:

1. Precast bases shall be supported on a compacted level foundation of crushed stone, as
specified in Section 02300 EARTHWORK, at least 6-inches thick, but shall vary to
the depth necessary to reach sound undisturbed earth.

2. Precast reinforced concrete sections shall be set vertical and with sections in true
alignment.

3. Butyl rubber joint sealant shall be installed between each concrete section.

4. All holes in sections used for handling the sections shall be thoroughly plugged with
mortar. Mortar shall be one part cement to 1-1/2 parts sand, mixed slightly damp to
the touch (just short of "balling"), hammered into the holes until it is dense and an
excess of paste appears on the surface, and then finished smooth and flush with the
adjoining surfaces.

B. BRICK WORK:

1. _ Bricks shall be moistened by suitable means, as directed, until they are neither so dry
as to absorb water from the mortar nor so wet as to be slippery when laid.

2. Each brick shall be laid as a header in a full bed and joint of mortar without requiring
subsequent grouting, flushing or filling, and shall be thoroughly bonded as directed.

3. The brick inverts shall conform accurately to the size of the adjoining pipes. Side
inverts shall be curved and main inverts (where direction changes) shall be laid out in

smooth curves of the longest possible radius which is tangent to the centerlines of
adjoining pipe.

2019 CIPP Lining Project Precast Manholes
Nashua, NH 02631-5

C. CASTINGS:

L.

Cast iron frames, grates and covers shall be as specified. The frames and covers
shall be set by the Contractor to conform accurately to the grade of the finished
pavement, existing ground surface, or as indicated on the drawings. Frames shall be
adjusted to meet the street surface.

Cast iron manhole frames and covers not located in paved areas shall be set 6-inches
above finished grade, at a height as directed by the Engineer, or as indicated on the
drawings. The top of the cone shall be built up with a minimum of 1 course and a
maximum of 5 courses of brick and mortar used as headers for adjustment to final

grade.

Frames shall be set concentric with the top of the concrete section and in a full bed of
mortar so that the space between the top of the concrete section or brick headers and
the bottom flange of the frame shall be completely filled and made watertight. A
thick ring of mortar extending to the outer edge of the concrete shall be placed all
around the bottom flange. The mortar shall be smoothly finished to be flush with the top
of the flange and have a slight slope to shed water away from the frame.

Covers and/or grates shall be left in place in the frames, for safety reasons, except
while work is being performed.

D. ACCESSORIES:

l.

2.

Accessories shall be installed in accordance with manufacturer's instructions.

Stubs shall be set accurately to the dimensions indicated on the drawings. Stubs
shall be sealed with suitable watertight plugs.

3.02 LEAKAGE TESTS:

A. Leakage tests shall be made by the Contractor and observed by the Engineer on each
manhole. The test shall be by vacuum or by water exfiltration as described below:

B. VACUUM TEST:

1.

The vacuum test shall be conducted in accordance with ASTM C1244. Test results
will be judged by the length of time it takes for the applied vacuum to drop from 10
inches of mercury to 9 inches. If the time is less than that listed in Table 1 of ASTM
C1244, the manhole will have failed the test. Test times from Table 1 are excerpted
below.

TABLE | Minimum Test Times for Various Manhole Diameters

Diameter (Inches)
Depth (Feet) 48 60 72

2019 CIPP Lining Project Precast Manholes

Nashua, NH

02631-6