This is the answer to the question posed in https://www.electrical-contractor.net/ubb/Forum5/HTML/000521.html
AKA: "Wireway the Right Way"
Yes, it's the transformer mounting. We had to buy 6X6X1/4" square tube and
weld base plates on it. Then we hoisted the steel up into the wall and
welded the top to the structural steel above and anchored it to the floor.
Unistrut was welded to the steel to make the transformer support. The whole
operation was designed by us and approved by a structural engineer. Welding
was done in house by a certified welder. It turned out pretty clean!
[This message has been edited by electure (edited 04-29-2004).]