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ACI Code Requirements for Cast-in-Place Columns

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ACI Code Requirements for Cast-in-Place Columns

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Questions and Answers

What is the minimum percentage of longitudinal reinforcement required in a column according to the ACI Code?

1.5%

0.5%

1% (correct)

What is the maximum percentage of steel allowed in a column according to the ACI Code?

8% (correct)

What is the minimum number of longitudinal bars required for compression members with rectangular or circular ties?

4 (correct)

What is the minimum size of ties required for longitudinal bars #10 or smaller?

#3 Signup and view all the answers

What is the recommended minimum diameter of a column?

8 in. Signup and view all the answers

What is the consequence of having less than 1% longitudinal reinforcement in a column?

Sudden nonductile failure Signup and view all the answers

What is the maximum center-to-center spacing of ties in a column?

All of the above Signup and view all the answers

What is the minimum diameter of spirals in a column?

3/8 in. Signup and view all the answers

What is the purpose of a complete circular tie in a column?

To hold longitudinal bars in place Signup and view all the answers

Why is a slightly larger φ specified for spiral columns?

Because of their greater toughness Signup and view all the answers

What is the primary reason why the failure of a column is more severe than the failure of a beam?

Because columns generally support a larger part of a structure Signup and view all the answers

What is the minimum overlap required for the ends of a circular tie?

6 in. Signup and view all the answers

What is the minimum size of ties required when longitudinal bars are larger than #10?

#4 Signup and view all the answers

What is the maximum center-to-center spacing of ties allowed?

16 times the diameter of the longitudinal bars Signup and view all the answers

What is the minimum percentage of longitudinal reinforcement required in non-composite compression members?

0.01Ag Signup and view all the answers

What is the minimum number of longitudinal bars required in compression members within rectangular or circular ties?

4 Signup and view all the answers

What is the minimum clear spacing required between parallel bars in a layer?

1 in Signup and view all the answers

What is the maximum percentage of longitudinal reinforcement allowed in non-composite compression members?

0.08Ag Signup and view all the answers