Award winner
 Seismic reinforcement work of the floating torii gate of Itsukushima. Shrine, an important cultural property
 
 Applicant:The Japanese Association for Conservation of Architectural
@@@@@@ Monuments
Reason for selection:
Extensive restoration work of the torii gate of the captioned shrine, an important cultural property, was carried out for the first time in roughly 70 years, and as part of the work, seismic diagnosis was conducted through detailed structural survey and construction analysis with a 3-D model. The diagnosis found that each torii column had large hollows caused by decay and termites and that its pedestal had marks of previous repairs. It was structurally weakened and was in need of structural reinforcement.
Taking into account a unique situation that the torii gate is located in the sea and is constantly subjected to seawater, it has been decided to use SUS312L (NSSC270) with its high seawater resistance and corrosion resistance for designing and making horizontal bands to reinforce the previously-repaired parts and vertical bands to press and support the hollowed parts.
The floating and historically important torii gate, as a composing element of the Itsukushima Shrine, a world heritage, is one of Japanfs symbols visited by many people every year.
The use of SUS312L this time has enabled the applicant to make the torii-gate more quake-resistant with stainless steel, while retaining its cultural value., .
Stainless steel types used: SUS312L

Consumption: 665 kg

Presenter: Alloy Corporation
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