green building concrete door and window frames, TARA GreenCast Frames TARA GreenCast Frames technology provides a pioneering solution for manufacture of high quality, long lasting and affordable Concrete Door and Window Frames using reinforced cement concrete. The production system consists of specialized rubber moulds, which are placed inside GI channels. A series of GI channels are mounted on the vibrating table; fitted with vibration mechanism to achieve uniform compaction and high quality surface finish. Two sets of door frames can be manufactured in every production cycle.