In today’s world, the use of composite materials is increasing as it has to fulfill the demand for new materials that can meet various requirements across different fields. Glass fiber reinforced polymers (GFRPs) is a fiber reinforced polymers made of plastic matrix reinforced with fine fibers of glass. This study aims to determine the influence of hollow steel tube reinforced in composites. Experimental investigation on the strength of steel tube reinforced of E-glass polyester composite material L-section is carried out to increase the stiffness of glass/polyester composite material. Specimens with tubes will give thema higher strength than specimens without tubes.