Structures:
Mass:
A mass structure is a structure that is made by combining similar materials into a certain shape or design. Mountains are an example of a natural mass structure, and brick walls are an example of a man-made mass structure.
Frame:
Frame structures are the structures having the combination of beam, column and slab to resist the lateral and gravity loads. These structures are usually used to overcome the large moments developing due to the applied loading.
Truss: 
These structures are composed of bars that form triangles. They are lightweight and sturdy. Examples include cranes, electricity pylons, etc.
Suspended: 
These are held in place by cables and suspended attached to study supports , Examples include suspension bridges, tents, marquees, etc.