Unmanufactured construction material.
(2) Unmanufactured construction material. The contracting officer must compare the cost of each foreign unmanufactured construction material to the cost of domestic unmanufactured construction material. If the cost of the domestic unmanufactured construction material exceeds the cost of the foreign unmanufactured construction material by more than 20 percent, then the contracting officer shall determine that the cost of the domestic unmanufactured construction material is unreasonable.