Abstract: In steel buildings filled with infilled masonry, if there is no appropriate connection between infilled and frames in the direction of vertical on plane thereby it leads the infilled masonries to throw away in the form of traversal that is likely to cause casualties. Therefore, to prevent this throwing, it is necessary to create suitable connection between infilled masonry and the frame. Since the infilled masonries in the normal direction to the plane don't have out of plane required stability, using steel elements like bars can provide stability to these infilled masonries. In this article, by the help of numerical modeling of specifications of holding bars like number, length and diameter under different loading is studied. Results indicated that the more the length of bars of connection between frame and infilled was, the more load capacity and flexibility of its frame increased regarding the area under load-displacement curves.