An installed ACO Drain System should incorporate the following:
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Correct grate type |
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Correct channel type and size
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Minimum grade 4,000psi compressive strength cement concrete surround
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Channel units are installed in a continuous trench, and
are fully encased with concrete. |
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1. Excavation
Excavate trench
to accommodate trench drain system. Excavation should be made around
the center line.
Excavation must be
sufficient enough to accommodate each of the following:
i Channel/catch basin width
and depth dimensions.
ii Concrete surround dimensions -
a minimum of 4” (Load Class A) of concrete on all sides, allow 6”
for FlowDrain
products to accommodate installation brackets. Specific loading and
ground conditions will increase excavation size.
iii For sloped systems,
excavate base to roughly follow fall of trench drain run.
Ensure all loose material
is removed and base is compacted.
Run string line and laser
level at finished surface level along full length of excavation to
ensure trench is installed at correct grade.
2. Layout and outlet installation
All
installations should start from the outlet point. For sloped
trench systems, polymer concrete catch basin drill-outs match
every 5th channel unit.
i |
Determine type of outlet required and its position |
ii |
Install the outlet channel/catch basin and set haunch |
iii |
Select the numbered sloping channel units in order from deepest (highest channel number) to shallowest |
iv |
Install channels working away from the
outlet |
If
fabrications are required,
click here for instructions.
3. Trench drain installation
Channel units need to be supported at correct height and held securely in place to avoid movement during concrete
pour.
There are a number of options available to support channel units.
a. Polymer concrete products
For new construction use either patty supports or installation devices.
For retrofit into an existing slab, channels can be hung from existing slab.
For detailed installation instructions for
polymer concrete channels,
click here
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Patty supports
Care should be taken that concrete is not trapped in joint between channels.
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Channel Clamp
Channel clamp holds channel joints, and rebar allows height
adjustment
and leveling. |
Channel Hanger
2x4 slides through pocket at top of hanger. Hanger fits into
locking bar recess on channel. |
A number of
installation aids are available, see
Accessories for details.
b. Fiberglass products
These products have installation devices attached to frames to allow trench to be
held in position by No. 4 or 5 rebar. FG200 can also be hung from grate locking.
For detailed installation instructions for
fiberglass channels,
click here
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4. Channel bracing
To prevent the channel wall and joints being distorted by
the pressure of concrete, grates (or
plywood cut to a snug
fit) should be installed in the channel.
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The grates should be suitably wrapped to protect from concrete splash. Shims or washers placed along each side allow easy removal of the grating.
Fiberglass products are supplied with foam blocks to brace channel walls to prevent distortion.
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5. Concrete pour
Concrete should have minimum 3,000 psi compressive strength.
Concrete should be poured evenly
(both sides of channel) and carefully to avoid dislodging channels.
A wand type vibrator should be used to ensure concrete distributes
evenly underneath and around channels.
6. Pavement finishing
The top of the adjacent pavement must be above the grating level by approximately 1/8" (3 mm).
Brick pavers should be set slightly above the trench edge. First brick course should be set on mortar/concrete.
Care should be taken with asphalt rolling machines to avoid damage to trench edge.
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7. Completing trench installation
i |
Remove grates and remove protective wrapping. |
ii |
Remove debris from trench drain and make sure outlet pipes are clear.
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iii |
Install trash buckets in catch basins, if required. |
iv |
Flush trench run to check for pipe work blockages. Unblock if necessary.
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v |
Empty trash buckets and clean out pipe
connections, if necessary. Re-install trash buckets. |
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vi
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Re-install grates in proper position ensuring
they are securely locked down. |
The trench drain is now ready for use.
Maintenance
Regular
inspections of the trench drain are recommended. Frequency will
depend on local conditions and environment, but should be at least
annually.
Inspections
should cover:
•
Grates and locking devices
•
Catch basins and
trash buckets
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Concrete surround and adjacent paving
All items
should be inspected for damage, blockage or movement. Compare
with site drawings if necessary.
Maintenance Guidelines: |