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. There are four basic forms: the beam, the arch, the truss and the suspension.

2. A beam carries horizontal loads by bending.

3. The bottom of the beam is subjected to vertical tension.

4. If two or more beams are joined rigidly together over supports, the bridge is called a simply supported beam bridge.

5. A single – span truss bridge carries vertical loads by bending.

6. Trusses are popular because they use a great amount of material to carry large loads.

7. The arch bridge requires more material than a beam bridge of the same span as it has the more complicated foundation design.

8. The deck of the suspension bridge must be either heavy or stiff or both.

9. A cantilever bridge is generally made with two spans.

10. The tensile forces in the cables also put the deck into horizontal compression.

II. Answer the following questions:

1. What are basic bridge forms?

2. What loads does a beam carry by bending?

3. What is the bottom of the beam subjected to?

4. When is a bridge called a simply supported beam bridge?

5. When does the bridge become continuous?

6. Why are trusses popular?

7. How does the arch bridge carry loads?

8. What parts of the suspension bridge are subjected to compression?

9. Where does the central span rest in a cantilever bridge?

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