Doctor Rain is the largest manufacturer for Rainwater Harvesting Module Tank in China factory, with two large factories in Bao’an of Shenzhen, since 2013 it has been making and exporting this rainwater harvesting module, which can be used for building underground stormwater attenuation/retention/detention/infiltration system.
This is a plate type modular tank, there could be 3 or 5 or 7 supporting panels inside, and their bearing strength varies. When we use 5 supporting panel inside with the tank made of 100% virgin material, the bearing strength can reach 90 tons/sqm. See the picture below