Concrete foundations need not always be reinforced, but where the load to be carried is high and the bearing capacity of the soil poor, heavy reinforcement is usually necessary.

• 混凝土基础不必总是用钢筋来加固。但是,若承受的荷载很大,而且地基的承载力又比较低,通常有必要用钢筋进行大力加固。