By NORMA Group
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Frequently Asked Questions
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Unlike a manifold pipe system, sediment will be deposited only in row(s) that receive inflow, and mainly in the StormChamber SedimenTraps. Inflow row(s) will have a SedimenTrap in the first and last chamber of the row into which sediment accumulation can be monitored and vacuumed out through the 10 in. riser pipe directly above each SedimenTrap.
After opening the inspection/maintenance manhole cover, use a high-power flashlight or measuring stick to inspect the SedimenTraps. If the sediment is overflowing out of the SedimenTrap and into the chamber, it is ready for maintenance.
Unlike other competing systems, NDS StormChamber systems do not require a camera to inspect the entire length of the sediment row for buildup. We also do not require that the row be flushed, so no water jetting is required. The StormChamber system only takes minutes to inspect/maintain by simply opening a manhole cover and checking for buildup. Once it is determined that maintenance is required, only a simple vacuum truck is required.
NDS StormChamber systems do not require an external manifold system. We rely on our internal side portal connections using a 10 in. PVC pipe to connect the rows. This allows water to travel laterally between chamber rows. It also works as an emergency spillway for long lasting high intensity storm events. Eliminating the manifold leads to a smaller footprint, less excavation, stone, and material cost which allows NDS StormChamber systems to have a lower installed cost than competing systems.
A manifold system may be used if specified by the engineer; a manhole with weir would also be required to direct the inflow to the SedimenTrap row.
Yes. NDS StormChamber systems have successfully tested and are in compliance with ASTM F2787 standard for plastic storm water chambers.
The spacing between the rows of chambers should only be measured from the centerline of one chamber to the adjacent chamber instead of measuring the distance between rows.
|
Chamber Model |
SC-18 |
SC-34 & SC-34W |
SC-44 |
|
Chamber Width |
38 in. (965mm) |
60 in. (1524mm) |
77 in. (1955mm) |
|
Separation |
6 in. (150mm) |
9 in. (225mm) |
9 in. (225mm) |
|
Centerline to Centerline |
44 in. (1117mm) |
69 in. (1752mm) |
86 in. (2184mm) |
Only ¾ in. to 2 in. crushed washed angular stone or concrete may be used. Under no circumstances should round stone be used.
Either stone or soil can be used as fill above an NDS StormChamber system.
Refer to the following table for the diameter sizes each chamber can accept.
|
|
SC-18 |
SC-34 |
SC-44 |
|
End wall |
15 in. |
30 in. |
36 in. |
|
Top portal |
10 in. |
10 in. |
10 in. |
|
Side portal |
8 in. |
10 in. |
10 in. |
No. The NDS StormChamber product line has been available since 1998 and has been trusted on hundreds of projects.
Tracked equipment must not exceed 1100 lbs (500kg) per square foot always maintaining a minimum of 6 in. stone below.
NDS StormChamber products can be purchased at any NDS distributor. Most all distributors are set up to sell NDS products. Please contact NDS if you have any questions or need help finding an authorized distributor near you.