Heavy duty aluminum, metal, and diamond plate semi-truck deck plates for sale. Semi deck plates are super heavy duty and offer access to the top of your semi-truck to disconnect trailer hoses or connectors. Deck plates are available with or without LEDs. Semi-tractor deck plates are available in several different sizes, or can be ordered in a custom size. Semi-truck deck plates feature engineered aluminum construction, fully welded seams and corners, LED lights (lamps) on certain models, and reinforced decking supports.