Webjul 26, 2024 · this timber has been pressure treated for critical structural (cs) applications, such as posts for post frame buildings, decks, porches, pavilions, pergolas, and. This timber has been pressure treated for critical structural (cs) applications, such as posts for post frame. Websep 29, 2024 · western red cedar's warm tone, natural grain and unique texture is unmatched. Inherent insect and rot resistance give it outstanding durability.