This article is a practical installation guide for GFRP reinforcement in U. slabs and foundations: cutting, tying, bar spacing, cover, splices, typical mistakes and several details where GFRP behaves differently from steel. Important: this is not a design guide. Concrete is reported to be the most widely used substance on earth after water and rec- ognized as a highly cost-effective versatile material used. Fiberglass (GFRP) rebar is no longer an exotic material. In the United States it is already used on a daily basis in bridges, parking garages, industrial floors and even regular residential slabs and foundations. But one practical question still worries many contractors: How do you actually install. Reinforcing concrete with steel rebar or welded wire mesh provides many benefits including crack control, the need for fewer control joints, and increased structural strength and impact resistance. They are added to fresh concrete during the batch-ing and mixing process. The primary differences between conventional steel reinforcement and fibers. Several useful documents on fiber-reinforced concrete (FRC) have been developed by ACI Committee 544 on Fiber-Reinforced Concrete, including the ACI 544.