Read how the Tay Bridge collapsed. Match the sentences (1-5) with the diagrams (a-e) below.
1. There was strong wind when a train was crossing the bridge.
2. The base of one of the columns lifted.
3. This (lifting) caused the strengthening parts of the structure to collapse.
4. The whole structure started to fall.
5. While the structure was falling, the girders collapsed in the opposite direction, causing the pier to collapse completely.
* (“Engineering” Workshop by Lindsey White, OUP; Unit 20, pg.23, ex.4)