ATP polyester resin bars reinforced with fiberglass will not interfere with radio frequency waves where traditional steel bars can interfere with radio frequency waves. ATP polyester resin bars can be used for fences and walls in sensitive areas such as airports, military installations, repeater sites, etc. where the designer needs to insure the absence of radio
frequency wave interference. This is an application for which the use of alkali-resistant glass fiber extends both to the realization of the elements of the fence and to that the realization of the curb in concrete. The elements of the fence are realized by means of pultrusion technology using glass roving and isophthalic polyester resin. The reinforcement of the curb is made with vinylester resin and glass roving bars Φ14 mm with improved adherence and stirrups Φ10 closed loop shape.