The phrase "a pair of constructions" is correct and usable in written English.
It can be used when referring to two specific structures or frameworks, often in contexts like architecture, linguistics, or engineering.
Example: "In our analysis, we will examine a pair of constructions that illustrate different architectural styles."
Alternatives: "two types of constructions" or "a couple of structures".
A pair of construction workers climbed out one tall and slope-shouldered, the other short and squat.
A pair of construction workers climbed out — one tall and slope-shouldered, the other short and squat.
Meanwhile, a pair of construction industry groups said a safety consultant would be hired to evaluate crane installation procedures to see if they need to be improved in the wake of the accident.
And when, jilted and upset, she briefly leaves the campus for the world beyond, she finds salvation in a bar of soap, inhaling it deeply in a motel bathroom and then, in a diner, offering a sniff of its healing powers to a pair of construction workers.
From the B-H-K viewpoint, a sentence of the form (A ∨ B) asserts that either a proof of A, or a proof of B, has been constructed; while ¬ (¬A & ¬B) asserts that an algorithm has been constructed which would effectively convert any pair of constructions proving ¬A and ¬B respectively, into a proof of a known contradiction.
visitnorway.com With a distinct Middle Earth feel, the Breidablik Cabins (there are two at the site) are a unique pair of constructions built from stone which was lugged up the 1,160m mountain.
Elsewhere, Nicolae Golici, born in Romania and now based in New York, presents a pair of Sputnik-like constructions made of wooden panels.
Cut a pair of thin pieces of construction paper for the eyebrows.
This Icelandic New Yorker has created a pair of fanciful, quasi-architectural constructions inspired by two of the museum's French neo-Classical period rooms.
The latest in a series of midcareer contemporary artists to have solo shows at the Met, Ms. Sigurdardottir has created a pair of fanciful, quasi-architectural constructions — follies, you might say — inspired by two of the museum's French period rooms.
