Which statement regarding high-rise construction is NOT correct?

The correct assertion in this case revolves around the statement that spirals are unnecessary for aggregates smaller than 3/4 inch. When designing reinforced concrete columns, the use of spiral reinforcement provides confinement to the core concrete, improving strength and ductility. This is particularly important for larger diameter columns or when dealing with higher loads and seismic concerns.

However, the statement suggests that for aggregates smaller than 3/4 inch, spirals are not required. In reality, while smaller aggregates may influence the concrete's workability and strength, the requirement for spiral reinforcement is more closely related to the confinement needs of the column rather than the size of the aggregates alone. Proper confinement can enhance the performance of any concrete column, regardless of aggregate size, especially under load and during seismic events. Therefore, the effectiveness and need for spirals is not negated simply by the aggregate size being less than 3/4 inch, making this statement not accurate.