Tie–beams of footing are widely used to connect all isolated footings including eccentric footings. In the case of eccentric footing the tie beam is called strap beam. Numerical parametric finite element method has been applied to study the considered tie beams – footings system. The influence of strap beams connected with eccentric footing and tie beams connected with centric interior footing in the contact pressure , the percentage of column loads transmitted by tie beams , the percentage ratio of vertical displacement to length of tie beam at different points under footings and tie beams and maximum percentage ratio of differential displacement to length of tie beam are analyzed. As well as the effect of tie beam stiffness, allowable bearing capacity of soil and tie beam position (in the level of footing and above the surface of footing) in the mentioned behavior of tie beams –footings are studied.