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Permeable Concrete
for Precast Projects

FlowSlab™: A hybrid
stormwater detention system

FlowSlab™ is an innovative, hybrid stormwater detention system developed through a collaboration between Locke and ABT Inc. It is designed to efficiently manage runoff and prevent flooding in urban and commercial developments. The modular, durable construction of FlowSlab offers maximum storage capacity while minimizing environmental impact.

Key Benefits

High Storage Capacity

6.71 cubic feet of water storage per Permavoid structure.

Modular 
Design

74% faster installations than a traditional pool.

Durable Construction

74% faster installations than a traditional pool.

Maintenance-Friendly

74% faster installations than a traditional pool.

A reliable solution that meets
the demands of modern
stormwater management

with the combined expertise of Locke and ABT Inc.

FlowSlab

Benefits

  • Maximizes Land Use. Allows for greater development potential by utilizing underground space for water detention.
  • Reduces Flood Risk. Manages excess rainwater, preventing costly flood damage.
  • Scalable Solutions. Suitable for all projects, from small developments to large-scale infrastructures.
  • Space Savings. Designed for shallow applications and space restricted sites.

Calculations on slabs & product specs

  • Load Capacity. Designed to withstand HS-20, pedestrian, and light vehicle loads.
  • Storage Volume. Available in multiple configurations, offering customizable detention capacity.
  • Water Flow Rate. Engineered to manage runoff with a controlled discharge rate.
  • Installation Depth. Suitable for shallow or deep installation depending on site conditions.
  • Dimensions. Modular units available in various sizes and shapes to fit unique site constraints.
  • Panel Thickness. The panel features a 4" slab with an additional 4" composite topping, bringing the total thickness to 8".

Why Choose FlowSlab?

01

Expert Engineering Support

Backed by a team of design and engineering experts to help customize your solution.

02

Sustainability Focus

Designed to minimize environmental impact while enhancing water management.

03

Made in the USA

All components are designed and manufactured in the United States of America.

Partnership Testimonials

"As we grow alongside Locke, we’re excited to consider new facilities and technologies. We’re always improving."

Ty Hermans

Managing Director — Plungie