On which type of drawings are sprinkler systems typically indicated?

Sprinkler systems are typically indicated on mechanical plans because these drawings specifically focus on the systems related to heating, cooling, plumbing, and fire protection, including sprinkler systems. Mechanical plans provide detailed information on how these systems are installed, their components, and their integration with other systems within a building.

Architectural plans focus primarily on the layout, design, and aesthetics of a building, rather than the specifics of mechanical systems. Electrical plans are centered around the wiring and electrical systems in a structure and do not encompass plumbing or fire suppression systems. Structural plans deal with the building's structural integrity and support systems, making them irrelevant for indicating sprinkler systems. Therefore, mechanical plans are the appropriate choice for indicating where and how sprinkler systems are arranged within a building.