To these layman's eyes, if those are the supports for the new left field area, it doesn't look that secure to me. But I suppose looks can be deceiving - the bleachers at Shea Stadium were similarly constructed...
(Photo taken September 24, 2007. © Gary Dunaier. Link to upload on Flickr.com: here.)
(Photo taken August 8, 2008. © Gary Dunaier. Link to upload on Flickr.com: here.)
Archie Bunker: All I can tell you, Edith, is I'm surprised at you! Dragging me off to a moving picture like that! It was absolutely disgusting!
Edith Bunker: Well, I'm sorry, Archie, how was I to know? I thought it was a religious picture, "Cardinal Knowledge!"