Also the Skin modifier in Blender might be able to create a structure like that also:

https://docs.blender.org/manual/en/latest/modeling/modifiers/generate/skin.html

Or maybe wireframe modifier:
https://blender.stackexchange.com/questions/2838/create-a-rounded-wireframe
https://docs.blender.org/manual/en/latest/modeling/modifiers/generate/wireframe.html

- Michael