An agricultural implement includes a frame assembly configured to support a storage tank. The frame assembly includes a pair of longitudinal beams positioned on opposite lateral sides of the storage tank, and multiple cross members extending between the pair of longitudinal beams. A substantially flat upper surface of each cross member is secured to a lower surface of each longitudinal beam, and each cross member is configured to support the storage tank via contact between the substantially flat upper surface of the cross member and a substantially flat lower surface of the storage tank such that the substantially flat lower surface of the storage tank is positioned vertically below an upper surface of each longitudinal beam.