A homeowner contracted for construction of a custom-built, e…
A homeowner contracted for construction of a custom-built, elevated deck in his backyard. The deck’s designer supervised the construction, which was carried out by several employees of a local building company. The homeowner was pleased with the appearance of the deck, but the first time he stepped on it, a support on one side of the deck gave way, causing the homeowner to fall and be injured. The homeowner brought an action joining the building company and the deck’s designer as defendants, alleging negligence. In his complaint, he alleged that he does not know which of the defendants is responsible for the damages. Which of the following doctrines would be most helpful against the designer?