Permavoid 85s

INNOVATIVE SUSTAINABLE DRAINAGE PRODUCTS AND SOLUTIONS

Permavoid 85s (PV85s) is a high strength, sustainable water management solution purpose built for athletic fields, blue to green roofs, podium decks, and landscape applications. Interconnected units, drain, store and convey stormwater in a shallow profile where it can be converted from a waste product into a precious resource. To do so, Permavoid systems utilize patented capillary cylinders which draw stormwater upward to vegetation without the need for sprinklers, pumps or energy. This can dramatically enhances landscape resilience during wet or dry extremes and forms the foundation for sustainable green infrastructure solutions.

Permavoid 85s
Ultra-Shallow Profile Shear Connector Structural Subbase Source Control

Ultra-Shallow Profile

The ultra-shallow profile promotes stormwater infiltration over the largest area possible, including under traditional and permeable pavements.

Shear Connector

Shear connectors prevent the modular units on top of each other from shifting or sliding sideways, creating a stable stack.

Structural Subbase

The ultra-high-strength (104 psi yield) safely and reliably transfers traffic loads to subgrade soils replacing large volumes of hauled subbase stone.

Source Control

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 85s

Accessories

Geotextiles

The following are for guidance only. Refer to design documents for site specific requirements.

1. Non-woven fabric for separation and/or infiltration:
– Tencate – Mirafi 1100N (or approved equal)
2. Woven fabric for separation and/or infiltration:
– Tencate – Mirafi HP270 (or approved equal)
3. Waterproof Membrane Liner for retention and/or detention:
– 40 mil HDPE or LLDPE (or approved equal)
Physical Properties
Material Polypropylene
Weight per unit 6.49 lbs 2.94 kg
Length 27.95 in 710 mm
Width 27.95 in 710 mm
Depth 3.35 in 85 mm
Area per unit 5.426 ft² 0.504 m²
Occupied volume per unit 1.513 ft³ 0.0428 m³
Structural Properties
Vertical compressive yield 103.7 psi 715 kPa
Lateral compressive yield 22.6 psi 156 kPa
Vertical deflection strength 464 psi / in 126 kPa/mm
Lateral deflection strength 55.3 psi / in 15 kPa/mm
Vertical creep limit (100 year) 24 psi 165 kPa
Hydraulic Properties
Average perforated surface area 65%
Volumetric void ratio 95%
Void volume per unit 1.438 ft³ 0.0407 m³
Conveyance at 0.0% Slope 37 GPM / ft² 24.9 LPS / m²
Conveyance at 1.0% Slope 78 GPM / ft² 53.2 LPS / m²
Conveyance at 2.0% Slope 109 GPM / ft² 74.1 LPS / m²
Conveyance at 3.0% Slope 134 GPM / ft² 91.0 LPS / m²
Other Properties
Recycled content 100%
Recyclability 100%
Country of origin United States of America