The phrase "are so constructed" is correct and usable in written English.
It can be used to describe the way something is built or designed, often referring to systems, structures, or objects.
Example: "The bridges in this city are so constructed that they can withstand heavy winds and earthquakes."
Alternatives: "are designed in such a way" or "are built in a manner".
The veins are more distensible than arteries, and their walls are so constructed as to enable them to expand or contract.
We are so constructed that the feeling of pleasure is inevitable in certain situations: sexual intercourse, eating delicious food, and the like.
It is not simply that we are so constructed that we cannot but accept their deliverances; it is that we are also entitled to accept them.
The harness was so constructed that deceleration (as the parachute opened), gravity, and wind forces were transmitted to the wearer's body with maximum safety and minimum discomfort.
The writing life is an anxious, competitive, and disappointing one ("Life is so constructed that the event does not, cannot, match the expectation," Charlotte Brontë wrote).
The sequential arrangement of the component dances in Sixteen Dances for Soloist and Company of Three (1951) was thus determined, and in Suite by Chance (1952) the movement patterns themselves were so constructed.
"Its vocabulary was so constructed," George Orwell wrote, "as to give exact and often very subtle expression to every meaning that a Party member could properly wish to express, while excluding all other meanings".
The FE model is so constructed that it reproduces the geometrical configurations of the tests.
Stability: The plasma must be so constructed that small deviations are restored to the initial state; otherwise, some unavoidable disturbance will occur and grow exponentially until the plasma is destroyed.
We might have been so constructed that the experience we describe as "being appeared to redly" caused us to believe, not that something is red, but that something is hot.
An operation of change can be so constructed that it adjusts the position of the input sentence in an ordering to be the same as that of a reference sentence.
