This research is the flexural behavior determination of beams, which reinforced by conventional steel, plain and deformed cold-drawn steel wire, and the combination of either type of steels. Six beams were tested on simply support and observed onthe moment-curature, moment-deflection, moment-maximum crack width, crack pattern, and mode of failure behavior. From the experiment, the strain compatibility method and equilibrium equation was used to predict the moment-curvature relation of beams, which full or partial reinforced by steel wire, correctly. Also, the moment-deflection relation of beams, especially for post-yielding stage, ws determined by using of previous moment-curvature data and the modified effective moment of inertia method. In case of cracking control, deformed wire gave better result than conventional steel and smooth wire, respectively. The observation shown that the using, approximately, minimum steel ratio, cold-drawn steel wire reinforced beam failed by rupture of wire. Analytical studyshown that the using of steel wire instant of convention steel by equivalent steel area produced higher ultimate moment capacity, but consideration of servicesbility was required. And the using of steel wire instant of convention steel by equivalent ultimate moment capacity resulted lower service moment than conventional reinforced beam. Finally, steel wire reinforced beam had usually low ductility index, which unsuitable to moment redistributed required structure.
