OSHA 10 Hour Construction Program Practice Test

What is a primary reason prestressed concrete is favored in modern construction?

1. It is less expensive than traditional concrete

2. Its unique strength allows for predetermined engineering stresses

3. It requires less maintenance over time

4. It is more eco-friendly than other materials

The correct answer is: Its unique strength allows for predetermined engineering stresses

Prestressed concrete is favored in modern construction primarily because of its unique strength characteristics that allow for predetermined engineering stresses. This approach involves the application of internal stresses to the concrete before it is subjected to any external loads. By doing so, prestressed concrete can withstand greater loads and span larger distances than standard reinforced concrete, making it an ideal choice for structures such as bridges, high-rise buildings, and parking garages. The ability to design and engineer these strengths provides architects and engineers with greater flexibility in terms of design and structural integrity while minimizing deflection and cracking under load. As a result, this method optimizes the performance of the concrete, allowing for longer spans with thinner slabs, and can lead to savings in materials while enhancing overall project efficiency.