When conducting strength tests of concrete, tests are not required when the volume of concrete is less than ____ cubic yards, and satisfactory strength evidence is submitted to the building official?

The correct answer indicates that strength tests of concrete are not necessary when the volume of concrete is less than 10 cubic yards, provided satisfactory strength evidence is submitted to the building official. This reflects industry standards and building codes that recognize the practicality of testing smaller quantities of concrete.

When dealing with smaller volumes, the logistics and costs associated with strength testing may not justify the need, especially when historical data or documentation exists to demonstrate that the concrete mix typically used has consistently met strength specifications. Submitting satisfactory strength evidence can include past test results or certifications from the concrete supplier, which helps ensure the quality and safety of the construction without the burden of additional testing for minor volumes.

This approach also streamlines the process for contractors and builders, facilitating more efficient project timelines while maintaining safety and compliance standards. Understanding these regulations helps in adhering to best practices and building codes in the construction industry.