Cast iron plate of size 600 mm x600 mm x12 mm OR
Galvanized iron plate of size 600 mm x600 mm x6 mm OR
Copper plate of size 600 mm * 600 mm * 3.15 mm
› Plate is burred at the depth of 8 feet in the vertical position and GI strip of size 50 mmx6 mm bolted with the plate is brought up to the ground level.
› These types of earth pits are generally filled with alternate layer of charcoal & salt up to 4 feet from the bottom of the pit.