Engineering tools in building define the techniques and principle of Structure stability, Suitability of the structure on the land on which the structure is created of made. in this point of view, the structural design, its ingredient ratio ( cement, sand, aggregate, reinforcement) are most important. so in this section we design the structural drawings of a building by which the building may be made.Mainly in this section the structural drawing of foundation and column reinforcement, as main bar, supporting bar, binding rings are to described.