Fortress walls are 5.5 inches thick and the foundations are 10.5 inches thick and are steel reinforced. The panels and bases are constructed on steel vibrating tables, using violent vibration. The vibration drives the natural stone to the surface of the mold, creating a beautiful stone panel. The vibration also eliminates all of the trapped air, resulting in a non-porous wall.
High grade stainless steel plates are anchored in the corners of each panel. A piece of stainless steel angle is then placed on the plates and the unit is welded together.
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