An example of foundation drawings with drains
Drawing labels, details, and other text information extracted from the CAD file (Translated from Spanish):
shower, laundry, toilet, sanitary battery drainage plant foundation, aisle, shower, laundry, toilet, aisle, towards the septic tank, foundation for the axles, foundation beam, concrete cyclone, longitudinal: rods, transverse: rods each in the confinement zone each, longitudinal: rods