1. Structure Holds up the floors, the roof, and the walls Holds up the floors, the roof, and the walls Structure spans space Structure spans space Since a building’s structure is often visible, some knowledge of structure is important Since a building’s structure is often visible, some knowledge of structure is important St. John the Divine

2. Beams Egyptians used large stones, spans were limited to the sizes of the stones which could be found and lifted into place

3. Arches Washington Square Park, NYC Arch technology reached its height during the era of the great Gothic churches Arch led to vault and dome

4. Lille Belt Truss Bridge, Denmark Truss Taking short sticks of lumber and tying them together in triangular arrangements Spans even larger spaces

5. American Bridge Annapolis, MarylandSuspension Recently perfected cable suspension structures Representation of the advanced technology of this age

6. Air Structures Latest innovation in encapsulating space Capable of spanning great spaces economically Air pressure holds up the roof (like a balloon)

7. Conclusion Technology helps to provide the structural logic of form Technology helps to provide the structural logic of form Only contemporary architects have had the opportunity to explore structures through scientific methods Only contemporary architects have had the opportunity to explore structures through scientific methods Accurate Calculations Accurate Calculations Webb Bridge, Australia