Ответьте на вопросы к тексту

1. Why was the site a difficult one?

2. What were the three footing types the engineers used?

3. What did the use of spread footings result in?

4. Why were drilled piers placed near the channel's edge?

5. What is the structure of the arena floor?

6. How do the cast-in-place columns under the floor area function?

7. What are the trusses of the roof system made of?

8. How are they joined?