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Civil Engineering PE

Category - Member Design

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Which of the following assumptions regarding the compression strength of concrete used in reinforced concrete beam design is valid?

The American Concrete Institute (ACI) recommends that all beams be designed using high strength concrete
High strength concrete compression strengths range from 3,000 to 7,000 pounds per square inch
Compression strength of normal concrete ranges from 3,000 to 7,000 pounds per square inch
None of the above

Explanation

Answer: C - The assumption “compression strength of normal concrete ranges from 3,000 to 7,000 pounds per square inch” for the concrete used in reinforced concrete beam design is valid. ACI does not recommend that high strength concrete be used in the design of all beams. The compression strength of high strength concrete ranges from 7,000 - 15,000 pounds per square inch.

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