ASC Steel Deck offers Form Deck in two profiles, 1 3/8″ (CF 1 3/8) and 7/8″ (CF 7/8). The 7/8″ depth profile is sinusoidal while the 1 3/8″ deep profile is trapezoidal. Both are stay-in place forms used to support the placement of structural concrete. The load capacity of the decks are required only until the concrete has cured.