They're not steel beams... probably just a bit of tin or something.
A photo from one of my favorite sites...

A 'miniature' used for the 1974 movie THE TOWERING INFERNO
I also think "large miniatures" may have been used for the 9/11 movie, even if they were only one of the ingredients in the final mix. It seems like an obvious way of obtaining somewhat realistic effects of fire, explosions and collapses, and "magicians of the miniature" were not hard to come by in the late nineties.Critical Mass wrote:I've often thought the 9/11 movie would have used scale miniatures for some of the scenes...
An image purporting to be in fact. Looks kinda cobbled together, which made me look at it further. Would they be afloat during construction? Not in dry dock?mnew9 » April 2nd, 2017, 3:50 pm wrote:A picture of sister ships Olympic (left) and Titanic together during construction at Harland & Wolff in Belfast.
http://www.williammurdoch.net/articles_ ... ry_03.html
Titanic - I`m the king of the world! - Full scene HD
full link: http://www.youtube.com/watch?v=oRl0BO0XTlY
https://www.youtube.com/watch?v=oRl0BO0XTlY