NCIDQ IDFX Practice Exam

What is an advantage of using double T pre-cast concrete floors?

1. They are lightweight and easy to handle

2. They allow for infinite design flexibility

3. They are commonly found in parking garages

4. They can be easily cut at any point

The correct answer is: They are commonly found in parking garages

Using double T pre-cast concrete floors in construction offers several significant advantages, one of which is their widespread application in parking garages. The design of double T slabs provides substantial structural support, allowing them to span large distances without requiring additional columns. This characteristic makes them particularly suitable for the open spaces needed in parking garages, where maximizing usable area is crucial. The inherent strength and durability of pre-cast concrete also contribute to reduced maintenance requirements, enhancing their long-term performance in such environments. While the other options present certain benefits, they do not specifically highlight the primary advantage of double T pre-cast concrete floors in this context. For instance, while they may be somewhat lightweight compared to other structural elements, they are not as easily handled as lighter materials. Additionally, the flexibility in design is not as pronounced with pre-cast units due to their standardized shapes. Furthermore, while cutting can be done, it is not typically an advantage associated with their use, as it can compromise structural integrity. Thus, the practical application and performance characteristics in parking garages underline the value of double T pre-cast concrete floors in construction.