Two precast concrete panels meet at a 90-degree corner, joined by a 4-inch by 4-inch by 1/4-inch length angle anchored into each panel. Each panel embeds two 3/8-inch diameter by 2-inch welded studs and a number 4 reinforcing bar, 16 inches long. Two 2-inch coil bolts with washers and coil nuts secure the panels to the internal angle. The exterior joint is sealed with a backer rod and Thiokol sealant.
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