What were andeson shelter's made of?

Anderson shelters were made primarily of corrugated steel sheets, which were designed to be easily assembled in backyards. The structure featured a semicircular shape and was supported by metal rods, with a wooden floor for added stability. Insulation was provided by soil or earth piled on top of the shelter, which helped to protect occupants from bomb blasts during World War II. These shelters were intended to be a practical and cost-effective solution for families seeking safety from air raids.