Thanks! I've probably sunk around 15 hours into thus far, not counting the time it's taken to collect specific details relating to the construction of the complex. The architectural blueprints (
some of them are here) are sadly hard to read in certain sections, meaning I have to spend a great deal of time researching exact measurements for various components. Irritating.
As for the towers themselves, each had 110 floors and were almost identical save for a few relatively minor differences, such as Tower 1 (1368ft) being 6 feet taller than Tower 2. Structurally speaking, they possessed 47 core columns, with 240 box shaped welded steel peripheral columns (59 per face +1 at each chamfered corner - the edge of each tower was chamfered exactly 6 feet, 11 inches). Both the core and perimeter columns tapered at several sections of each tower, reflecting the fact that they had to support less weight at higher elevations.
The steel outer perimeter columns attached to horizontal spandrel plates.
The weight of each tower was, as I recall, estimated to be around 500,000 tons, and these columns were built to support the total weight of each tower several times over. The peripheral columns, which were basically sections of vertical steel beams that were attached to horizontal plates at a spacing of 3'-4", were covered with an anodized aluminum facade, which is why the towers had that beautifully mellow reflectivity.