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Designers should compute the interaction diagram for the lea…

Designers should compute the interaction diagram for the least favorable bar orientation in a circular column because they have little to no control over how the bars are actually installed.

Published January 9, 2025
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Compute the maximum bar spacing, s, to control for cracks in…

Compute the maximum bar spacing, s, to control for cracks in a one-way slab with 1.5 in. of clear cover and f​y​ = 70 ksi.

Published January 9, 2025
Categorized as Uncategorized

Weakening of concrete near the top of a column is due to upw…

Weakening of concrete near the top of a column is due to upward migration of water in the fresh concrete.

Published January 9, 2025
Categorized as Uncategorized

Column ties increase the unsupported length of the longitudi…

Column ties increase the unsupported length of the longitudinal bars, thus reducing the danger of buckling.

Published January 9, 2025
Categorized as Uncategorized

Spiral columns are often used in situations where ductility…

Spiral columns are often used in situations where ductility is unimportant.

Published January 9, 2025
Categorized as Uncategorized

Due to how tedious the strength calculations can be for rein…

Due to how tedious the strength calculations can be for reinforced concrete columns, it is generally preferred to use interaction diagrams to design them.

Published January 9, 2025
Categorized as Uncategorized

A rectangular beam has a cross section of b = 18 in., h = 30…

A rectangular beam has a cross section of b = 18 in., h = 30 in., and d = 27.5 in. It is reinforced with three No. 5 Grade 60 bars. The concrete strength is 6,100 psi (normal weight). The beam has Grade 60 No. 3 stirrups. Determine the cracking moment, Mcr.

Published January 9, 2025
Categorized as Uncategorized

Rust does not cause cracks to expand because it occupies the…

Rust does not cause cracks to expand because it occupies the same volume as the metal from which it is formed.

Published January 9, 2025
Categorized as Uncategorized

The textbook author recommends the use of 180° stirrups thro…

The textbook author recommends the use of 180° stirrups throughout, except in certain cases where 90° stirrups are needed to prevent overlap.

Published January 9, 2025
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Tied columns have lower ductility giving less warning before…

Tied columns have lower ductility giving less warning before a failure.

Published January 9, 2025
Categorized as Uncategorized

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