both
shell and frame
chairs are shell/solid structures because it is a solid and can be considered a frame
frame structure
frame
A tent is a frame structure
frame structure
it is a frame sturctures
Glass frame shell mass is commonly used in construction and engineering as a lightweight, durable, and strong structural framework. It is made up of glass panels supported by a frame structure, usually made of metal or reinforced concrete, to provide stability and support. The combination of glass, frame, and shell elements provides both aesthetic appeal and structural integrity to the building or structure.
A shell structure supports its self and a frame structure does not support it self.
its a frame
A pop can is considered a shell because it is a hollow structure with a thin exterior wall. It does not have a solid mass throughout, like a solid frame.
mass