What does a mechanical contractor oversee during construction?

A mechanical contractor plays a crucial role in construction by focusing on the coordination of all mechanical-related work. This encompasses a wide range of activities, including the installation of heating, ventilation, and air conditioning (HVAC) systems, plumbing, and other mechanical systems that are vital to the functionality of any building. By overseeing these elements, the mechanical contractor ensures that all mechanical systems operate efficiently and meet the required standards and codes.

In contrast, the other options are not accurate representations of a mechanical contractor's responsibilities. For example, overseeing only electrical system installations would limit the scope of their work, which is not reflective of the broader mechanical systems they handle. Likewise, while ensuring structural integrity is essential in construction, it falls under the domain of structural engineers rather than mechanical contractors. Lastly, focusing solely on uninterruptible power supply installations is too narrow, as mechanical contractors are involved in various mechanical systems beyond just power supply, making their role more comprehensive than any single aspect of construction.