Engineering Specifications for StormChamber™
Systems

Each unit will be 34.04" high, 60" wide and 102.5" long.

Lay-up length will be 8.1' (start and end unit) and 7.6' (middle unit).

Each chamber will be formed from high molecular weight/high density polyethylene, with up to 50% recycled HDPE .

Each chamber will exceed the AASHTO standard H-20 wheel load rating by over two times in order to provide sufficient loadings buffer.

Each chamber will be capable of supporting over 25' of cover.

Each chamber has 14 ribs of approximately 3.6" in height, 3.8" wide at the top and tapering to 4.4" at the bottom. Spacing of the ribs at the bottom of the chamber is approximately 4.9" and approximately 3.2" at the top. One smaller rib sized dimensionally to effectively nest under and interlock to connect units is 2.9" high, 3.3" wide at the top of the rib, and 4.1" wide at the base.

Overall height to the inside rib will be 30.44".

Overall height to the outside rib will be 34.04".

Invert height for 12" ID PVC pipe in side portal will be 16.49".

Invert height for 10" ID PVC pipe in side portal will be 17.49".

Invert height for 8" ID PVC pipe in side portal will be 18.49".

Each unit will be able to accept up to 12" ID PVC feed pipe in the unit's side portal, or up to 30" OD pipe in the end wall.

Each unit will be able to handle 9.8 cubic feet of storage per lineal foot internally, 115 cf for the standard configuration (6" stone base above and below), and up to 161 cf with 6" of stone above, and up to 36" of stone below.

Use of filter fabric between the soil and stone backfill layer and lining the side walls of the excavated area is required to prevent intrusion of soil or silt into the chambers and surrounding stone.

Each system will include device(s), integral to the system for the capture of sediment which can be cleaned out with a vacuum truck.

Each system will include a means for disposing the storm water throughout the system without the extra cost and square footage of a manifolding system.

Each system will require no compaction of the stone base nor placement of filter fabric under the system to avoid restriction of its infiltration capabilities.

Stone used will be 1.5"-2" angular, hard and washed.