Utilization of steel bars in reinforcing concert constructions for building industries has been concerned more than 100 years. In spite of their individual properties, steel reinforcing bars are severely subjected to different environmental conditions (i.e. high humidity, very cold/hot climate, alkaline or acidic conditions, environment of high salt-component, etc.); so that, they strongly suffer from the corrosion effects. Paying no particular attentions toward this issue, might be resulted in disastrous problems in term of the materials poor functions when they are employed as reinforcing components in concrete constructions. For overcoming this problem, extensive efforts have been carried in designing and manufacturing of new bars with desirable properties which in turn leads to appear FRP bars (composite bars reinforced with fibrous materials) suitable in concrete reinforcing. Some individual characteristics including the possibility of using high performance fibers as the structural reinforcement component based on the material end-uses, as well as the ability of lightening up the final product but with higher strength, have been resulted in developing the application of FRP bars in different technical and industrial fields. The importance of these materials in strengthening and lightening up the concert materials, made us to be interested in studying the effect of employing other textile structures as the composite FRP bars reinforcements, instead of the commonly used unidirectional reinforcing fibers. Among different method of fabric production, braiding process with the ability of fabricating 3D rod-shaped textiles in various cross-section as well as their high flexibility in using numerous kinds of high performance fibers, has been considered as one of the high potential method for FRP production, through this research. Here, three different FRP rods varying in their constitutive fibers fineness and orientation (to the central axis of the rod) have been prepared using an experimentally designed 3D braiding machine. In this work, 600-tex and 1200-tex E-glass fibers were employed as reinforcing component of the rods which were oriented at two different angles, namely 16? and 25? to the rod axis. The braiding apparatus containing 48 yarn carriers, were fed by the prepared bobbins of glass fibers. Applying changes in production rate of the machine, was the key point in varying the fibers orientation during the 3D braided textiles. The prepared braid structures, were then hand-laid up using the epoxy resin and embedded into a pre-designed molds to be cured. After 48-houre, the produced composite samples were then post-cured in a vacuum oven for further 6-hour. In order to compare the mechanical performance of the prepared square cross-section composite rods with the conventionally used steel bars, different tensile and bending (three-point) test were applied to the specimens. The results revealed that changing the fineness of reinforcing fibers as well as their orientation, severely affect the FRP mechanical performance during different tensile and bending loadings. It was also concluded that the FRP rods mad of 600-tex glass fibers, have higher strength and stiffness against tensile and bending forced. Moreover, the structures in which the fibers are oriented at smaller angle, show significantly improved mechanical behavior due to the higher fibers parallelization. Statistical analysis applied to the results of tensile and bending test, approve the significant differences between the mechanical performances of FRP rods reinforced with glass 3D braid textiles in comparison with steel bars. Totally, according to the results is could be claimed that the FRP composite rods are considered as good alternatives for steel rods for concert reinforcing, due to their high mechanical performances. Keywords: fiber reinforced composite, FRP rods, Mechanical properties, 3D braid textiles, glass fibers.