Load-Bearing Area Non-Cars Area (1.5T) Small Car(12.5T)      Intermediate-Size Car(40T) Large Car (60T) Minimum Value of Cover Earth thickness  400 mm 800 mm 1000 mm 1200 mm Maximum  Value of Cover Earth thickness  2750 mm 2500 mm 2250 mm 2000 mm The Depth from the Bottom of Module to the Ground  500 mm 5000 mm 5000 mm 5000 mm Maximum Value of the Module Installation       Layers 7 7 6 6 Quick Details: The Material of PP Module:  PP (Polypropylene) Specification:800mm*800mm*250mm Place of Origin :Jiangsu China Brand: Tianchi        The Advantages of PP Rainwater Harvesting: 1 Easy to Carry 2 High Load-Bearing Capacity 3 Environment Protection 4 Easy to Check and Wash 5 Long-Life -Span 6 High Water Storage Rate