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.)
Gerardo Parra, a lefthand batter, steps in to lead off. Harvey's first pitch on the way, it's a fastball on the inside corner for a called strike, nothing and one, a 93-mile per hour fastball to Gerardo Parra. Parra batting at .281 with 6 homers, 28 runs batted in. - Howie Rose's call of Matt Harvey's very first pitch in the big leagues... Mets at Arizona, July 26, 2012