Metal Deck 101 A.C.T. Metal Deck Supply, the largest distributor of metal deck in the country, has prided itself on serving the needs of the building community. A.C.T. Metal Deck Supply stocks the metal deck and metal deck accessories you need for delivery or pick up. Whether you need immediate stock from our local warehouse or a preplanned custom fabricated order, we can get the deck you need to complete any project. For more information, please visit their directory here.