1. Diana Aguiar Narqui Amaya
The arch
Diana Aguiar
Narqui Amaya

2. Table of content -Introduction -Definition -Characteristics
-Variation of forms
-History
-Conclusion
-References

3. Introduction
Since the beginning of history, man has been preoccupied with finding a place to go, where to live, this need led to the creation of certain "house" where men take refuge.

4. In his early works made were symmetrical..
Over time the man was changing the form of the work

5. With the invention of the arch 2 problems were solved..
Definition
With the invention of the arch 2 problems were solved..

6. Characteristics
Wedge shapes
Elements of the arch

7. An arch cannot replace a lintel on two free-standing posts
unless the posts are massive enough to buttress the thrust and to conduct it into the foundations

8. May be varied to meet specific problems
The forms of arch
May be varied to meet specific problems

9. Fall into three basic categories:
Rounded arch
Arcade

10. Parabolic arch

11. Pointed Arches
Vaults

12. The arch has been found in many different cultures..
History
The arch has been found in many different cultures..
Mesopotamia

13. Egyptians
Romans

14. Etruscans Medieval times
Porte Auguste

15. Modern arches
Steel
Concrete
Laminated wood

16. Conclusion

17. References en.wikipedia.org/wiki/Arch
Encyclopaedia Britannica, vol. 1. Chicago: Encyclopaedia Britannica, Inc., 1974, pp Edited by Prof. Marianela Najul for second language teaching purposes. May, 2010.
theriverlands.tripod.com/Writings/Arch/arch.html