24.1. Introduction

Try these first

1. 1.

   What is the compressive strength of concrete compared to its tensile strength?

   Hint

   Think about the relationship between the two strengths.

2. 2.

   Why is reinforcement added to concrete beams?

   Hint

   Consider what happens to concrete under tension.

3. 3.

   What is the primary reason concrete beams require reinforcement?

   • To increase compressive strength
   • To enhance tensile strength
   • For aesthetic purposes

   Hint

   Think about the properties of concrete.

4. 4.

   True or False: The ACI-318 code is not necessary for reinforced concrete design.

   • True
   • False

   Hint

   Consider the safety regulations in engineering.

5. 5.

   Given a beam with a known compressive strength of 3,000 psi, calculate its tensile strength and describe what considerations should be made when designing this beam.

   Hint

   What ratio of tensile to compressive strength should you apply?

6. 6.

   Discuss potential consequences if a designer fails to consult the ACI-318 code during the design process.

   Hint

   Think about the protection that codes provide.