When can shoring be removed from concrete forms?

The removal of shoring from concrete forms is based on demonstrating that the load-carrying capacity of the structure is sufficient to support itself. This assessment ensures that the concrete has achieved a specific strength, which is crucial for the safety and integrity of the structure being constructed.

While curing and time are important factors in the concrete's development, simply waiting for a predetermined time, such as 28 days, does not account for variations in environmental conditions, mix design, or structural specifics that can affect how quickly concrete reaches its required strength. Therefore, relying on empirical measures of strength, such as performing tests or observing behavior under load, is the most reliable means to determine when shoring can safely be removed.

Thus, option B emphasizes the importance of structural integrity, which is essential before proceeding to remove any support systems like shoring.