Precast concrete manufacturers, working in conjunction with trade associations like the National Precast Concrete Association, have developed tools to simplify calculations that engineers typically use in designing stormwater systems. One of these is the Stormwater Detention/Retention Calculator. The tool simplifies calculations needed to specify stormwater structures for underground detention/retention systems.
Instructional Videos
These videos, along with the manual above, explain how to use the calculator:
Part 1: Introduction
Calculator Introduction (MOV)
Part2: Design Data Tab
Data Tab (MOV)
Part 3: Incremental Volume Tab
Incremental Volume (MOV)
Part 4: Standard Product Tab
Standard Products Tab (MOV)
How to Use the Calculator
Detention Calculator – How To (MOV)
