REINFORCEMENT MATERIALS OF ASSEMBLING WATER TANK

In a built-up water tank including a plurality of panels, an improved tension reinforcement material which is compact and conveniently built up for construction is coupled to sidewalls for reinforcing the supporting strength of the sidewalls. After connecting a rod body (10) with a connection socket (20), a socket bolt (30) is penetrated a water tank (50) from its outside to its inside and a packing (1), a washer (2) and a nut (3) are locked. After that, the socket bolt is threaded into the connection socket (20) at its one end by means of a spanner fixture (33) which is connected with the other end. If the nut (3) is fastened toward the panel (51) of the water tank (50), the washer presses the packing (1), thereby closing the inside of the panel (51). Then, a packing (1'), a washer (2') and a nut (3') are sequentially locked. As described above, the closing effect can be improved by fastening the nuts (3,3') after inserting the packings (1,1') at both sides of the panel, thereby improving the stability.