What type of construction plan details the layout for mechanical, electrical, and plumbing systems?

The correct response highlights that mechanical plans specifically focus on detailing the layout, installation, and specifications for mechanical, electrical, and plumbing (MEP) systems within a construction project. These plans are crucial as they provide important information for the proper installation and integration of HVAC systems, electrical wiring, and plumbing infrastructure.

Mechanical plans ensure that these systems are designed to function efficiently, comply with relevant codes, and operate safely in conjunction with the building's overall design. They help contractors and engineers understand the required materials, dimensions, and connections necessary for successful execution.

In contrast, architectural plans primarily illustrate the building's design and aesthetic elements, such as floor layouts and elevations, while site plans usually depict the overall site layout, including landscaping, parking, and access points. Construction plans encompass a broader scope and might integrate various components, but they do not focus solely on the mechanics of MEP systems as mechanical plans do. Hence, the specificity and detail provided by mechanical plans make them the appropriate choice for this question.