Ooooh...good question. My impression is that it's fairly strong - I know two adults can use it without a problem. I believe it is supported on the sides and front by the fiberglass top and underneath by the (hopefully reinforced?) roof of the van...
This website is not affiliated with or endorsed by the Airstream, Inc. or any of its affiliates. Airstream is a registered trademark of Airstream Inc. All rights reserved. Airstream trademark used under license to Social Knowledge LLC.