Structures are groups of elements united to support loads with stability. There are different types of structures including frame, shell, arch, mass, and suspension structures. Frame structures are composed of long elements joined together, leaving empty space to support loads. Shell structures surround a volume using a thin outer material. Arch structures use geometry to displace forces to the sides. Mass structures are simply made of clumped materials. Suspension structures hold elements with cables from a tall column, making them suitable for large bridges.

1. Structures

3. Everything has a structure, otherwise it would collapse under the forces of gravity, the force of wind or any other force.

5. Shell structures

6. Arch

7. Mass structures

8. Suspension structures

10. There're empty space between elements and they support a load.

11. They're easy to design and buid, not requiere much material but they aren't good for expensive loads or strong impacts.

13. It can be empty or filled with something.

14. Natural shell structures: Shellfish

15. Artificial: Boxes, bottles, …

16. They keep shape and support loads without frame or solid materials inside.

19. The structure is normally thick

23. Elements: Column, foundation, primary beams and secondary beams.

25. They are classified as:

29. Tensional strain.

30. Compression forces.

31. Shear strain.

32. Torsion forces.

33. Bending forces

35. It can be due to forces that pull an element from its ends.

44. JARA CADENAS URQUÍA.