Telecom towers may be a ground based tower (GBT) or a roof top tower (RTT). Hello Dosto is video me ap logo ko tower ke type ke bare me bataya hu kitne type ke. We provide both Ground Based towers (GBT) and Roof Top towers (RTT). Jitendra Fabri-Galva Private Limited - Offering GBT Angular Telecom Tower in Ghaziabad, Uttar Pradesh. Jitendra Fabri-Galva Private Limited - Offering GBT Tubular Telecom Tower, दूरसंचार टॉवर, Telecommunication Towers in Ghaziabad, Uttar. Bill of Materials of Towers & Foundation 11 3.