General Discussion
In reply to the discussion: FIU Bridge - What's missing from this picture [View all]lapfog_1
(29,204 posts)I saw a virtual 3D animated fly-through of this bridge yesterday.
The roof structure over the bridge appears to be made of concrete... and rather thick concrete supported by thick angled beams of concrete ( probably over steel beams ).
Why add so much weight to the structure for something that blocks the sun and maybe rain ( but not if the wind is blowing )?
A simple steel "cage" bridge with perhaps a thin walkway of glass or tile or even wood ( treated against weather ) with a canvas covering (replaceable) for a roof would have weighed a fraction of what was built, probably not requiring any suspension support. Would have cost less as well.
Or forget the roof covering altogether ( most pedestrian walkways over freeways here are like that ).
Just wondering why so much concrete was required.