High-rise buildings are generally slender and contain various obstacles that make it increasingly difficult to provide reliable positional control references as the construction proceeds upward. These limitations often make it difficult to achieve the accuracy, precision, and efficiency that is required by the construction specifications and schedule demands when only implementing conventional surveying methods. Global Navigation Satellite Systems (GNSS) have played a significant role in meeting horizontal alignment tolerances in modern high-rise construction but lack the accuracy to provide reliable elevation references. Modern high-rise buildings are primarily comprised of reinforced concrete cores which experience substantial shortening throughout the course of construction due to effects related to shrinkage, creep, and compression. Movements related to these effects are magnified as the height of the structure increases, resulting in compounding strains and ultimately sinking floor elevations. Expected shortening estimations are typically performed during the design phase but such models lack consistency due to variations in actual material properties and loading conditions experienced during construction. Therefore, the actual shortening experienced should be monitored during construction for quality control purposes and to satisfy the construction specifications that generally require floor elevations to be verified and corrected at regular intervals. This study evaluated the feasibility of utilizing embedded strain gauges to accurately and efficiently monitor reinforced concrete core wall shortening and resulting changes in floor elevations during the construction of the 1,070-foot-tall Salesforce Tower in San Francisco.