Mechanical Drawing Symbols

This reflected ceiling plan (RCP) sample shows lighting and HVAC layout.
"A "reflected ceiling plan" shows a view of the room as if looking from above, through the ceiling, at a mirror installed one foot below the ceiling level, which shows the reflected image of the ceiling above. This convention maintains the same orientation of the floor and ceilings plans - looking down from above. Reflected Ceiling Plans or RCP's are used by designers and architects to demonstrate lighting, visible mechanical features, and ceiling forms as part of the documents provided for construction." [Floor plan. Wikipedia]
The lighting and HVAC layout example "Reflected ceiling plan" was created using the ConceptDraw PRO diagramming and vector drawing software extended with the Reflected Ceiling Plans solution from the Building Plans area of ConceptDraw Solution Park.

This electrical floor plan sample shows the lighting layout on the classroom reflected ceiling plan.
"Architectural lighting design is a field within architecture and architectural engineering that concerns itself primarily with the illumination of buildings. The objective of architectural lighting design is to obtain sufficient light for the purposes of the building, balancing factors of initial and operating cost, appearance, and energy efficiency. Lighting designers are often specialists who must understand the physics of light production and distribution, and the physiology and psychology of light perception by humans. Architectural lighting design is generally concerned with the permanent illumination of a structure. Concert and theatrical lighting have different purposes and practitioners." [Architectural lighting design. Wikipedia]
The electrical floor plan example "Classroom lighting - Reflected ceiling plan" was created using the ConceptDraw PRO diagramming and vector drawing software extended with the Electric and Telecom Plans solution from the Building plans area of ConceptDraw Solution Park.

This reflected ceiling plan sample was created on the base of the article "How to Read a Reflected Ceiling Plan" from wikiHow.com.
"A reflected ceiling plan (RCP) is a drawing, which shows the items that are located on the ceiling of a room or space. It is referred to as a reflected ceiling plan since it is drawn to display a view of the ceiling as if it was reflected onto a mirror on the floor. This way the reflected ceiling plan has the same orientation as the floor plan associated with it. It is as if the ceiling was see-through and you could see right through it to the floor below. Architects and interior designers draw reflected ceiling plans when designing spaces." [wikihow.com/ Read-a-Reflected-Ceiling-Plan]
The HVAC layout example "RCP- HVAC layout" was created using the ConceptDraw PRO diagramming and vector drawing software extended with the Reflected Ceiling Plans solution from the Building Plans area of ConceptDraw Solution Park.