Comprehension check. I. Decide whether the following statements are true or false according to the text.

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

1. Truss bridges are supported by frameworks called girders.

2. The parts of the trusses are arranged in the form of rectangles.

3. A main span may attend more than 300 metres.

4. Most truss bridges have two sets of trusses.

5. The roadway of a through truss bridge runs on the top of the trusses.

6. Each truss extends between two abutments in a simple span truss bridge.

7. Truss bridges require less construction material than the girder type.

8. Early arch bridges consisted of stone blocks in the form of an arch.

9. The road of arch bridges can lie both on the top of the arch and below the curve on the arch.

10. The roadway is supported by the abutments.

II. Answer the following questions:

1. What is a truss?

2. Where are truss bridges built?

3. How are the parts of the trusses arranged?

4. What may the length of a main span be?

5. What does each truss consist of?

6. What is the difference between a deck truss bridge and a through truss bridge?

7. Why do engineers prefer to build truss bridges?

8. Why are arch bridges called so?

9. What were early arch bridges made of?

10. How must arch bridges be designed?

11. Where can the roadway of arch bridges lie?

12. How is the roadway supported?

13. What is done to prevent the ends from spreading out?

14. What weight do the abutments support?

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