The phrase "act as a ceiling" is correct and usable in written English.
It can be used in contexts where something is functioning as a limit or upper boundary, often in discussions about economics, regulations, or physical structures.
Example: "The new policy will act as a ceiling on the maximum allowable emissions for factories."
Alternatives: "serve as a cap" or "function as a limit".
In his winning plan, he used only the top thirty feet of the foundation for the section into which people would descend to view the exposed wall; a new floor would be constructed that would help support the wall and would act as a ceiling for the space below, which would be used mainly for garages and service areas.
The very employer match that serves as an incentive to make a contribution, can act as a ceiling, in which employees take the match as the recommended maximum contribution level.
A chunk of the High Line acts as a ceiling, and the atmosphere is cacophonous but friendly, with elements of the frat house, thanks to two purple table-tennis tables (people use them even when they're littered with majestically tall beer glasses), as well as the fairground, owing to a ticket booth at the entrance where you buy $8 stubs, one for each draft beer or food item.
The price acts as a ceiling to keep costs low and would fall slowly over the 20-year life of the system.
California has already gotten this lesson half right with a price floor, and the California Air Resources Board is in the process of developing a policy on "cost containment" that will act as a price ceiling.
Critically, this federal legislation should act as a floor, not a ceiling, for privacy interests.
This would act as a floor not a ceiling: local authorities could choose to set their eligibility threshold more generously but would not be able to tighten their criteria beyond the new national minimum threshold.
The office will sit on a 176-acre plot of land, most of which will be dedicated to indigenous flora and fauna to act as a barrier between the floor-to-ceiling glass walls and the outside world.
Its signature modular geometric structures also act as a decorative feature throughout the house — in ceilings, along windows, even as table legs and balusters.
Speaking of buzz, the dining room, with a vaulted ceiling that seems to act as a soundboard, is one of the noisiest I've encountered.
As a woman who has broken through the glass ceiling, you have the platform to act as a mentor to others looking to achieve that same accomplishment.
