#Free ild files beam show free
To the contrary, a structure that features more supports than required to restrict its free movements is called redundant or indeterminate structure. These type of structures, that offer no redundancy, are called critical or determinant structures. If a local failure occurs the whole structure would collapse. Therefore, the simply supported beam offers no redundancy in terms of supports. Obviously this is unwanted for a load carrying structure. Removing any of the supports or inserting an internal hinge, would render the simply supported beam to a mechanism, that is body the moves without restriction in one or more directions. The roller support also permits the beam to expand or contract axially, though free horizontal movement is prevented by the other support. Both of them inhibit any vertical movement, allowing on the other hand, free rotations around them. It features only two supports, one at each end. The simply supported beam is one of the most simple structures.