Some of the issues that I encounter while reading case 54, was that the subcontractor had put different sprinkle heads on every floor. The Contractor didn’t specify what kind of sprinkler head was needed during the installation. When the owner came to inspect , he wasn’t satisfy that the sprinkler heads were different in every floor . In my point of view I think that the contractor has the fault for not specify to the subcontractor in the beginning of the project ,on what type of sprinkler head was needed. The contractor is responsible for checking the shop drawings and submittals. If they choose to change it , the contractor will have to pay for the expenses.