Are you thinking of placing access panels for the equipment to the bridge along that outer wall? While we've seen people making repairs on the inside of the bridge, this give yours the opportunity to be more descrete with repairs.
And while I like those arching I-beams along the parimeter of the bridge, they look too much like iron being red... Not that the colour means they are iron, that's just the initial feeling (ugh feelings suck) when I look at it. And therefore it looks too contemporary with our time. Meh- just a thought.