Grillage foundations are mostly used at the base of a column. It consists of one, two or more tiers of steel beams superimposed on a layer of concrete, adjacent tiers being placed at right angles to each other and all the tiers are encased in concrete.
Grillage foundation is used to transfer heavy structural loads from steel columns to a soil having low bearing capacity. There are many advantages of grillage foundation. the major advantage is it is economical and it is light. Grillage foundations does not require deep cutting because the required base area with required pressure intensity is obtained at a shallow depth.