A lot of concrete structures are deteriorating to dangerous levels throughout Japan. These concrete structures need to be inspected regularly to ensure they are safe enough to be used. According to national standards. a visual inspection of the bridge is required once every five years. https://www.bekindtopets.com/top-price-Gemplers-4-mil-Disposable-Nitrile-Gloves-Bucket-of-1000-Gloves-p8887-huge-savings/