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Мосты.Тоннели.(Радиевская, Парменова).doc
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I. What can it be?

Cnosurtcniot, ceniveratl, beidgr, grried, tsrsu, peri, snespsionu

II. Decide whether the following statements are true or false according to the text:

1. Logs or vines across streams served as the first bridges.

2. A bridge on the suspension principle was made by people in the Middle Ages by means of handrails.

3. The Incas of Peru used beam bridges made of six strong cables.

3. An arch bridge is known to be the first bridge.

4. Another name for a drawbridge is a cantilever bridge.

5. Designers of the 19th century had to meet the demand for greater heights, spans, and strength.

6. Railroads expansion made iron trusses be replaced by stone arches.

7. Since late 1800s reinforced concrete has been chiefly used in bridge construction.

8. A steel-and-concrete girder bridge was one of the most commonly used bridge designs in the 20th century.

III. Answer the following questions:

1. What are the earliest types of bridges?

2. What periods in bridge construction can you distinguish?

3. What is the principle of a suspension bridge?

4. How can you explain the fact that drawbridges were mainly built in the Middle Ages?

5. What was the reason of adding additional support to a basic beam bridge in the 19th century?

6. What was Sir Henry Bessemer famous for? In what way did his invention develop bridge construction?

7. When did large-scale bridge building start? What are the reasons?

8. What does current research focus on?

LANGUAGE FOCUS

IV. Match the meanings of these terms with their definition:

drawbridge suspension bridge pier

obstacle steel bridge girder log

1. unhewn piece of a felled tree; any large rough piece of wood

2. a structure providing a way across a river, road, railway, etc.

3. iron or steel beam or compound structure for bridge-building etc.

4. hinged retractable bridge, esp. over a moat.

5. bridge with a roadway suspended from cables supported by towers

6. strong malleable alloy of iron and carbon

7. a support of an arch or of the span of a bridge; pillar

8. thing that obstructs progress, stands in the way

V. Match the period with the description:

1. many large-scale steel suspension bridges were constructed over major waterways

2. drawbridges were built across the moats of many castles in Europe

3. arch bridges were built of bricks and stone as building materials.

4. bridge design and construction were aimed to carry these heavy vehicles over new obstacles

5. a practical process for converting cast iron into steel was developed

6. period of large-scale bridge building in Europe and Asia

1. the 20th century

2. ancient Rome

3. between 1830 and 1880

4. the second half of the 19th century

5. late 19th

6. the Middle Ages