Contech Construction A-2026 Installation Manual
A-2000/A-2026
ENGINEERED SOLUTIONS
Unloading, Handling
and Installation Guide
Preface
This instruction book is for your crews. Distribute
it to help them install Contech® A-2000/A-2026
correctly. They are flexible pipes that must be
installed following the trench construction,
bedding, haunching, initial backfill, and other
requirements of ASTM D 2321,“Standard
Recommended Practice for Underground
Installation of Flexible Thermoplastic Sewer Pipe.”
Don’t assume experienced workers know all
the answers. Review these instructions with your
supervisors and crews. It can mean a better job
for you and your customer.
We suggest that you adopt a policy of
performance testing the first few manhole runs.
It will give you an early check that installation
procedures are correct.
If you have any questions about these instructions,
call your Contech Dealer or your Contech Sales
Engineer, or carefully review the installation guide
in the Contech A-2000/A-2026 catalogs and
ASTM D 2321.
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Contents
Cold Weather Installation .........................5
Unloading and Handling .........................6
Trenching ...............................................8
Installation Tips .......................................9
Assembly of Pipe ..................................10
A. Gasket/Pipe Connection ............. 10
B. Manhole Connection ...................12
C. Field Cutting Pipe .......................14
D. Caps .........................................14
E. Mechanical plugs ........................14
F. Tapping/Saddle Connections ........15
Repairs ................................................18
Installation of Pipe ................................ 20
A. Pipe Zone/Embedment Material....20
B. Deflection Control .......................26
Deep Laterals .......................................27
Special Notes .......................................28
This safety alert symbol indicates
important safety messages.
When you see this symbol, be
alert to the possibility of personal
injury and be sure you understand
the message that follows.
Terms You Should Know
Alerts you to
hazards or unsafe
practices that CAN result in severe
personal injury or property damage.
Messages about procedures
or actions that must be
followed for safe handling and installation
of A-2000/A-2026 Pipe.
Falling or rolling pipe
can
cause severe personal
injury
or death.
Read and follow all safety instructions before
unloading pipe.
4 5
Cold Weather Installation
1. Handle the pipe with more care in cold
weather. PVC becomes more brittle as
temperatures drop. When placing
embedment materials in deep trenches
and temperatures 0° - 32° F, it is
required to use smaller aggregate (3/4inch max.) and limit the height of stone
dump to 20 feet.
2. Rubber gaskets become harder as the
temperature decreases, gaskets tend to
compress less, and when combined with
PVC bells that become more installation
sensitive, jointing becomes less forgiving.
Proper bell-spigot alignment, adequate
bell and spigot lubrication, and
recommended joining procedures
(-i.e. bar and block) all become more
essential as temperature decreases. In
addition, it is recommended to store the
gaskets in a warm place prior to use.
Unloading and Handling
The following equipment is recommended for
unloading pipe pallets:
Forklift with full-length forks to engage entire
pallet width, front-end loader or backhoe
with fork adapters full length to engage
entire pallet width.
Nylon lifting slings of sufficient strength and
length to safely handle entire pallet. Do
not stand or ride on the pipe load during
unloading.
NOTE: Pipes sizes 18” and less are palletized
with steel straps around a wood frame. Full trailer
width pallets (21” to 36”) are not framed. Only
forks of sufficient length to engage entire pallet
width are recommended for unloading.
6 7
Failure to follow these instructions can result in
serious injury or death and/or damage to pipe.
1. Only trained and authorized equipment operators are to
be permitted to unload the trailer.
2. Wear approved safety hat and shoes, gloves, and
eye protection.
3. Park the truck and trailer on level ground before you
start unloading.
4. Keep all unauthorized persons clear of the area when
the driver releases the binders from the trailer and
during unloading.
5. Do not release steel strapping around the wood
frame until the pallets have been placed on level
ground and will not be moved again as a unit.
6. Know the capabilities and rated load capacities of
your lifting equipment. Never exceed them.
7. Do not stand or ride on the load of pipe while it is
being unloaded. Do not stand beneath or near
the
pipe when it’s being
unloaded.
8. If unloading at multiple points,
secure pallets between drop off
points. For each unit of four
pallets, always unload the top
pallets first. (See diagram)
9. Never attach chains or wire
rope to the pipe. They could damage the pipe.
10. Do not push pallets off the trailer or permit
pipe to drop to the ground.
11. Do not drag A-2000/A-2026 Pipe across
the ground.
12. Do not stack A-2000/A-2026 Pipe over two
pallets high. Stacks of three or more pallets can
damage bottom pipes and can become unstable.
13. Handle A-2000/A-2026 Pipe with extra
care in freezing or cold weather. Plastic pipe is more
brittle when cold.
Trenching
Trenching practice and bedding materials
shall be in accordance with ASTM D2321 and
OSHA rules.
1. The excavation needs to be wide enough
and be supported adequately to allow a
person to work safely.
2. Where trench walls are unstable, the contractor
may elect to use tight sheeting, stay bracing, or
a trench box for stabilization during pipe
laying. If the conditions are severe, sheeting
may be left in place.
3. Excessive groundwater may necessitate
dewatering.
4. An unstable trench bottom must be stabilized
at the engineer’s direction. In such cases, install
special foundation and bedding materials in
6-inch layers and compact.
5. Excavation from 6 inches to 12 inches below
the pipe should be filled with acceptable
bedding material and compacted to a minimum
90% Standard Proctor Density. Fill areas of
over excavation beyond 12 inches with
processed stone or gravel following standard
bedding practices.
6. Before installing the pipe, bring bedding
material to grade along the entire length of the
pipe.
7. When excavating in Class IV materials (silt, silty
clays, and clays), provide a uniform,
undisturbed foundation.
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Installation Tips
1. At manholes, flexible manhole connections like
rubber boots, A-Loks, etc. are recommended.
With rubber boot manhole connectors, install
either a standard A-2000/A-2026 double
gasket (8”-10”) or an A-2000 manhole gasket
(12”-36”) on the pipe spigot under the stainless
steel strap (See manhole connection detail.)
Where manholes are manufactured with A-Lok
connections, use a Contech PVC manhole sleeve.
2. Do not probe for the pipe with rods, shovels, or
other sharp objects when excavating down to
install laterals, etc. Instead, mark the elevation of
the pipe with stakes or other markers to help locate it.
3. When haunching the pipe or digging down to
install laterals, take care not to damage the pipe
with shovels, or other construction equipment.
4. String only enough pipe to use during the day’s
laying operations.
5. A full line of adapters to other pipes is available. See
Contech A-2000/A-2026
Fittings Catalogs.
6. After proper assembly, the first load of backfill
should be placed over the middle of the pipe.
While the first load is being placed, the free bell
end should be held on line by the pipe layer
(either by placing a foot inside the bell or by
straddling the bell with both ankles.) This
technique will minimiz e pipe mo v ement during
backfilling. Subsequent loads of backfill may be
placed in a normal fashion.
7. Handle A-2000/A-2026 pipe with
extra care in freezing or cold weather. Plastic
pipe is more brittle when cold.
8. Rubber gaskets become har der as temperature
decreases, gaskets tend to compress less, and
when combined with PVC bells that become more
brittle, jointing becomes less forgiving.
Assembly of Pipe
A. Gasket/Pipe Connection
1. The double sealing surface A-2000/A-2026
gaskets are fitted to the first two full
corrugations on the spigot end of the pipe as
shown in the drawing. (Note A-2000 gaskets
are black while A-2026 are gray)
The single sealing surface A-2000
Drainage gaskets are fitted in the first
corrugation valley as shown in the drawing.
Gaskets are shipped loose and require field
installation on the pipe spigot. The leading
(lower) edge of the gasket is marked with the
Contech logo and wording to distinguish
it from the seating (higher) edge.
The low height seal is fitted into the first
corrugation. The double sealing gasket is fitted
into the first two full corrugation valleys.
Spigot
Gasket
location
on 4”to 36”
diameter
A-2000/A-2026
Bell
(Plantformed)
Gasket location
on D-2000/
A-2000
Drainage
Pipe
end
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