Six ramadas (shade structures) were built in 1954 from the Tucson Arizona scrapyard bomb bay doors of B 29s at the Javelina Picnic Area. Hundreds of B-29s ended up in Tucson for decommissioning after World War II and Korea.

There are four small shelters with three doors each, one longer structure with five doors and a large group site at the center of the picnic area with a gabled roof made from eight doors lashed to a metal frame. The 25 doors — each roughly 14 feet long, 3 feet wide and still studded with rivets and mounting brackets — came from at least seven different B-29s.

A plate still mounted to one of the doors identifies it as a B-29 part made by Briggs Manufacturing Company, a Detroit-based company that switched from making car bodies for Ford and Chrysler to cranking out airplane parts during World War II.

https://tucson.com/news/local/bomber-doors-picnic-shelters-saguaro/article_267959ae-2b38-11ee-8c40-ff0706ba4006.html

This reminds me of the Jeep hoods used to make a roof of a garage in Italy that I posted about years ago http://justacarguy.blogspot.com/2021/05/hoods-from-junked-army-jeeps-in-ww2.html