I like the use of sky in the piece, with the gentle edges of clouds, and light blue, brightness spilling over onto the shining face of metal, all giving a sort of contrast to the metal with the red reflection.
And the short edge of red canvas in the frame is initally annoying, yes. I was almost going to suggest you eliminate it. But it holds the sky in, really keeping it in place as a refuge for the eye, a relaxation from the tense and sharp (yet flowing) metallic structure.
The varied use of different parts of the building gives this shot a character and variance I don't see often in pictures of this building. Good job, you have a wonderful eye.