CON/SPAN is a modular precast system designed to provide economic, large volume stormwater detention or infiltration below grade. CON/SPAN’s distinctive arch top and vertical side walls maximize storage volume and provide structural integrity. Combining the CON/SPAN arch unit with precast walls and cast-in-place foundations allows for an array of configurations to meet nearly any site need.
Construction of cast-in-place strip footings beneath CON/SPAN legs and end walls allow for a large open area in the center of each cell. These cells can be filled with crushed stone or granular material to allow for stormwater infiltration or recharge by percolating runoff through the granular material inside of the foundation.
CON/SPAN system provides efficient stormwater detention in a variety of footprints. Installation on a base slab foundation can be made watertight, which is ideal when dealing with high water table issues or subgrade soils sensitive to water infiltration.
CON/SPAN can be combined with the Stormwater Management StormFilter to provide high-volume stormwater treatment.
Distinctive shape; arch top and vertical side walls
Maximizes storage space; superior durability and structural integrity
Full range of span & heights
Versatile design capabilities
Precast continuous foundation
Ensures structural integrity and eliminates differential settlement
Manufactured in quality controlled environment
Superior quality over cast-in-place
Base slab, strip, or pedestal wall foundations
Foundation versatility
The CON/SPAN precast elements are three-sided arch units that offer rapid set-in place construction.