What does the ceiling plan express?

① The main axes and axis numbers of the main structure of the building, such as bays, depth and other main dimensions.

②The outlines and names or legends of ceiling shapes, lighting, air conditioning vents, exhaust fans, fire sprinklers, smoke detectors, and speakers.

③Ceiling shape, shape, positioning, size and elevation of lighting fixtures, air-conditioning vents, exhaust fans and other facilities.

④ Various facilities on the ceiling, decorative materials for each part, specifications, names, process descriptions of coatings, etc.

⑤Node detail index or labeling of sections, sections and other symbols.

⑥ In addition to the ceiling plan, the ceiling decoration construction drawings must also draw the ceiling's cross-sectional details in order to fully express its structure. Section symbols or detail index symbols need to be noted in the ceiling plan.