Is there any feng shui significance in building coffin-shaped stone benches in the big square?

Is there any feng shui significance in building stone benches into coffins? -For safety and hygiene reasons, the stone bench was built in the shape of a coffin. The coffin-shaped stone bench is wide at the bottom and heavy at the bottom, and the overall weight is extremely heavy and clumsy. Not easy to be broken, not easy to overturn, not easy to be moved or removed, not easy to be stolen. Coffin-shaped middle bulge, legs and feet are very comfortable to sit on. Coffin-shaped, the lower part of the stone platform is filled without gaps, and it will not be drilled into inferior waste, which is convenient for washing, cleaning and sanitation.