FND2 is primarily intended for unreinforced (plain mass) foundations. For reinforced foundations in DC-2 ground, specifiers often use FND2 with additional considerations or switch to a designed concrete (e.g., RC30 or similar) that meets both structural and chemical resistance needs. Check the project engineer’s specification, as reinforcement increases durability demands (cover, crack control, etc.). In some cases, FND2 can be used for lightly reinforced elements if the mix and placement comply fully with BS 8500.