August 10 2010 NPCA Detention Retention Calculator User Manual Precast Concrete Stormwater Detention Retention Calculator 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 Here s how it works Imagine you have a project that req
October 1 2011 NPCA Detention Retention Calculator User Manual Version 3 0 Precast Concrete Stormwater Detention Retention Calculator 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 Here s how it works Imagine you have a p