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更新日:2023年5月2日

National Important Property No.1 Wireless Transmission Tower

The construction of No. 1 Wireless T ransmission Tower of Hario T ransmission Station started in November 1918 and completed in May 1922 in the first place among three transmission towers. Its size is shown in Fig (1).The triangle-shaped structure 18 m on each side on the top of the tower shown in Photo (1) supported the areal wires, and it was removed in 1957. In 1920s, Sasebo Naval Station had a lot of accumulated engineering know-how for large-sized concrete structures which were represented by seawater-resistant concrete, mooring for ship repair services (Tategami Wharf) and crud oil tanks and so on. For the construction of the wireless transmission towers, it proceeded taking time in a careful manner such as wiping river sand, which contain less salt, and gravels with cloth before they were used in the construction. The surface of the tower still clearly shows the marks of the form work even 100 years after the construction, and no sign of apparent deterioration can be seen. This tower is considered a valuable structure that has been preserved for a long time as a quality reinforced concrete structure.

旧佐世保無線電信所第一号電信塔_図(1)

Fig(1)

 

旧佐世保無線電信所第一号電信塔写真(1)

Photo(1)

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