[Example] Waterproof zipper AQUASEAL(R): Sheet for underwater construction

The new method using waterproof zippers has resulted in approximately a 20% reduction in construction costs and time.

■Background for the Adoption of Underwater Construction Sheets The decrease in the number of divers for underwater construction and the challenges posed by site conditions (such as underwater visibility, current speed, and water temperature) have led to delays, increased costs, and reduced safety. Additionally, the removal of debris generated after the removal of materials used underwater, as well as the costs associated with repairs and maintenance for reuse, are also problematic. ■Key Points for Problem Solving Instead of the traditional assembly method using liner plates for temporary closures by divers, the new method employs waterproof sheets utilizing YKK's waterproof fastener AQUASEAL(R). These sheets allow for segmented construction, significantly reducing the underwater work performed by divers. This results in a reduction of underwater construction processes, improved economic efficiency through the reuse of plates, and a decreased risk of decompression sickness, enabling a reduction of approximately 20% in construction costs and timelines. (Note 1: Liner Plate: A construction material made of thin steel plates with wave processing and connecting flanges on all four sides. Multiple plates are combined and used in a cylindrical shape. Note 2: Estimated by Azai Technology Consultant Co., Ltd.)

fastener