The phrase "a plain structure" is correct and usable in written English.
It can be used to describe something that is simple, straightforward, or lacking in embellishments, often in contexts related to design, writing, or architecture.
Example: "The architect favored a plain structure, believing that simplicity would enhance the building's functionality."
Alternatives: "a simple design" or "an unadorned form".
The paper deals with an analysis of structural dynamics of a plain structure centering leveling device by performing appropriate modal analysis.
Specimen 'PFT' was knitted using float and tuck technique on a plain structure.
Specimen 'PF' and 'PT' were knitted using float (or miss) and tuck respectively on a plain structure.
The chancel arch, a "plain" structure, was inserted between the chancel and the nave in the 12th century, and the nave is of the same period.
Samuel Lewis said that the new church was "a plain structure in the old English style, with strong buttresses, which have a good effect, being so well suited to the exposed situation of the building".
And the historical record is metamorphosing into high-class wallpaper, to be applied by the yard to cover any plain structure of ideas.
Well known for their explorations of duality through a fragmented style of appropriation and collage, as well as their use of unique materials, FAILE have created a beautiful tapestry of color, giving life and personality to a very plain structure.
They turned onto Nostrand Avenue at P.S. 92 — a massive, plain structure that seemed to tolerate no nonsense; any scraps of lost train lines would have been swept away — and began zigzagging, one block north, one block east, peering through gaps between buildings.
After finishing our conversation, we walked through the snow to his studio, a solid-looking, plain structure, hand-made by the playwright-carpenter. Inside, it was unadorned and filled with files, books and papers, a desk and a computer.
The house is a plain, prefabricated structure.
"See that over there?" another host asked, pointing at a plain gray structure.
