Aluminum Tread Plate (also known as diamond plate or checker plate) is a type of aluminum rolled sheet that has a raised diamond or linear pattern on one side and is smooth on the other side. Because of its unique texture, it is often used to make walkways and ramps, where slipping is likely to occur. It is also very commonly used for decorative purposes. Since it is highly resistant to weathering, corrosion, and chemicals, tread plate requires no maintenance or surface treatments.