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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
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Spiral columns are often used in situations where ductility…

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

Published January 9, 2025
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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
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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
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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
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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
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In a typical construction cycle, the reinforcement and concr…

In a typical construction cycle, the reinforcement and concrete for the columns are placed after the reinforcement and concrete for the beams and slabs in a floor system above it.

Published January 9, 2025
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In tall buildings, higher strength concrete is generally use…

In tall buildings, higher strength concrete is generally used in the columns to reduce their size.

Published January 9, 2025
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Because the designer has little control over the arrangement…

Because the designer has little control over the arrangement of the bars in a circular column, the interaction diagram should be computed for the least favorable bar orientation.

Published January 9, 2025
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