The equipment of reinforced concrete by using native materials (cement-aggregates-steel) in ideal conditions help us producing concrete that consummate the Syrian Arab Code conditions, but these are not found in Engineering Structure workshop that have affection of characters used materials in one hand, and these behavior in the common work with steel –Structural behavior of Engineering member espial in serviceability stage, that may be expose accepted limits in other hand . So it is necessary to correct the Syrian Arab Code's formulas of deformation and finding suitable mathematical factors and formulas that insure structural safety for reinforced concrete members under bending moment that casted in structure workshop circumstances in Syrian Arab Republic.