Two problems have to be solved by all building construction
- how to keep the walls up
- how to span the spaces between them
See how the use of solid walls such as brick and stone has produced chunky low-rise buildings.
Learn how frame structures have been used to create tall buildings, clad with a range of materials from wattle and daub to glass.
Discover how architects and builders have developed arches, vaults and domes to span wide roof spaces.