Using construction drawings, what is the typical elevation of the top of a 24X18 duct?

To determine the typical elevation of the top of a 24x18 duct using construction drawings, it's essential to consider the common practices in duct installation and the typical heights specified in construction standards.

In many commercial and industrial settings, ductwork is installed at a height that allows for adequate clearance while also accommodating the necessary airflow and mechanical needs. A 24x18 duct, being a relatively larger duct for HVAC systems, will typically be positioned higher to avoid obstruction and to facilitate the appropriate air distribution.

In this context, one would analyze the standard elevation ranges that are often seen in construction for ducts of this size. The choice of 35 feet and 6 inches reflects a height that aligns with these considerations, ensuring that the duct is well above any potential ground-level obstructions, thus allowing for effective airflow and meeting building codes or regulations.

Furthermore, this elevation provides ample vertical space for ceiling heights commonly found in commercial buildings, which often exceed 10 feet. The other options present lower elevational values that might be more suitable for smaller duct sizes or specific building designs that do not prioritize the same clearance for larger duct systems. Hence, it is logical that 35 feet and 6 inches would be an appropriate answer for the specified duct size,