Structures are groups of elements joined together to support loads stably. There are five main types: frame, shell, arch, mass, and suspension. Frame structures are composed of long elements joined at the ends, forming an open structure. Shell structures use a thin material to form an enclosed shape containing an empty or filled volume. Arch structures spread forces outward from a central point through their semicircular shape. Mass structures use a solid filling of material to support weight. Suspension structures hold elements with cables anchored from tall columns, spanning large distances.

1. STRUCTURES Structures are groups of elements somehow joined together to support a load with stability.

2. There are five different types of structures: Frame structures

3. Shell structures

4. Archs

5. Mass structures

6. Suspension structures

7. Frame structures These are the most common structures.

8. They are composed of long elements which are joined to each other at the ends.

9. Elements are built with strong materials and the space between them is empty space.

10. They are easy to desing and build, inexpensive, lightweight and they don't require much materials.

11. However they are not goodfor very big loads or strong impacts.

13. Shell structures These are made of a thin material that surrounds a volume.

14. That volume can be empty or filled with something that has not structural relevance.

15. It mantains the shape and it's strong.

16. The cut layer can be thin because the forces are spread throughout the whole structure.

18. Archs Archs were invented by Romans.

19. Althought there are many types the semicircular arch is the most used.