Shop heartland (common: 10-ft x 12-ft; interior dimensions: 10-ft x 12 feet) statesman gable engineered wood wood storage shed in the wood storage sheds section of. 12×12 shed plans, with gable roof. plans include drawings, measurements, shopping list, and cutting list. free pdf download included.. Our classic gable shed is designed to fit into many different environments from small urban backyards to spacious cottage and rural gardens. free sample plans are.