A distinctive architectural form born of the post-war modernist design movement, the A-frame structure has typically not been viewed as significant enough to receive historic preservation attention. This brief argues that A-frame structures, because of their unique and characteristic shape, are deserving of preservation efforts. The brief also examines the history of the A-frame's development and varied uses and explores considerations for preservation efforts. Key concepts include post-war architecture, A-frame houses, A-frame structures, mid-century modernist architecture and design, American vernacular design, and endangered architectural styles.