Probably the most common report in the concrete industry is the concrete test report. Typically, a report is sent when a 7-day break is completed. Later, the same report is updated and resent with the 28-day test results. The concrete test report serves one basic purpose: to assure those involved with a project that the right concrete was delivered to the job site. While the format of test reports can vary from one testing laboratory to the next, each will contain the information needed to determine whether the concrete meets the job-site requirements.

Any building is going to have openings in walls or structural slabs, and openings can interrupt reinforcing bar curtains. Design and detailing requirements at an opening perimeter are provided, including the minimum required reinforcing and reinforcing needed to replace interrupted bars. Problems associated with commonly used details show that designers should be cautious of generic notes for trim bars around openings. Careful assessment of the opening size, location, bar spacing, and development may show that special details are required.

ACI 117-06 and ACI 117-10, “Specification for Tolerances for Concrete Construction and Materials,” require F-numbers to be measured within 72 hours after slab concrete placement.