ABT Permavoid is a modular interlocking plastic system designed for use as a combined drainage component and sub-base replacement. The system has exceptionally high compressive strength due to it’s engineered co-polymer polypropylene structure. The proprietary jointing system provides maximum bending resistance creating a horizontal structural ‘raft’ within the pavement allowing for the dissipation of heavy traffic loads to even poor subgrade soils. Both PV-150 and PV-85 are ideally suited to provide conveyance, detention and LID source control of stormwater all within an ultra shallow envelope.
The ultra-shallow profile promotes stormwater infiltration over the largest area possible, including under traditional and permeable pavements.
Shear connectors prevent the modular units on top of each other from shifting or sliding sideways, creating a stable stack.
The ultra-high-strength (104 psi yield) safely and reliably transfers traffic loads to subgrade soils replacing large volumes of hauled subbase stone.
Modular units with 95% void ratio interlock with patented lateral connectors to create a monolithic stormwater management system eliminating the need for an end of line pond and tank.
Permavoid can be easily modeled with the HydroCAD Stormwater Modeling system, allowing simplified analysis of its behavior in a drainage and stormwater management system. HydroCAD includes custom rating curves for these devices, which can be used with the “special outlet” capability to easily define its stage-discharge characteristics. Click here for details.
|Subbase Replacement Full System: Collection, Treatment & Storage. Replace up to 18 inches of aggregate subbase and 12 inches of excavation while managing stormwater within Permavoid.||Detail Sheets|
|Passive Irrigation Full System: Collection, Treatment & Storage. Reduce or eliminate irrigation expenses by utilizing stormwater. Control the volume of stored water to maximize the health and vitality of grass or other plant material.||Detail Sheets|
|Bioswale Outlet Full System: Collection, Treatment & Storage. Reduce the size and quantity of bioswales by maximizing the performance of each. Store water in Permavoid for controlled discharge to maintain ideal water depths.||Detail Sheets|
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