Oregon Construction Contractors (CCB) Practice Test

When should concrete slab or under-floor inspections be made?

1. After the concrete is poured

2. Before framing begins

3. Before the concrete is poured

4. After all electrical work is completed

The correct answer is: Before the concrete is poured

Concrete slab or under-floor inspections should be made before the concrete is poured. This timing is crucial because the inspection ensures that the groundwork, including the foundation, reinforcement, and any necessary plumbing or electrical lines that need to be embedded in the concrete, are installed correctly according to building codes and standards. Conducting inspections at this stage allows for any issues to be addressed prior to the irreversible step of pouring the concrete, which would make it difficult to rectify any problems afterward. By inspecting before the pour, inspectors can confirm that the subgrade is properly compacted, the vapor barrier is in place, and that any foundation reinforcements meet the specifications required for the structural integrity of the slab. This proactive approach contributes significantly to the overall quality and safety of the construction project.