Clearly these were formed with special tooling. It's a shame that something this nice doesn't find its way to perpetuity somehow.
Around here on trash days, we set out a special bag marked 'METAL" a few feet apart from the main pile. There are enterprising folks who drive around in their pick-up trucks collecting scrap metal. They take it to one of several local reclaimers and get a few $$ for their effort. It pains me to think that tooling for something as nice as these girders and supports might meet a similar fate at the hands of someone who simply doesn't care or know what they have.
The other day the boss (LHS) was telling me a story about how some very famous railroad flag movies were saved...A fellow saw huge reels of 16mm film curbside for trash pickup, realized what they might be, took them all.....and the railfan/hobbyist is now blessed to have the treasures preserved...first in VHS, now DVD. And how many times have we heard how our beloved Lionel/Marx/Flyer trains of yore ended up in a box/sack/can curbside?
Yepper, in enterprising hands, these gorgeous elevated supports would do VERY well today.....and tomorrow.