I always find it very difficult to decide how this type of image should be composed as no matter where you crop it, you will always lose something interesting.
With this image, I would be tempted to crop the top bend out so that the handrail exits the picture in the middle of the image to mirror where it comes in at the bottom..but then you lose that nice curve at the top???
Decisions..decisions.
Regardless, this is a very nice, abstract style image with clean sharp outlines which I hope does well. Good luck.
Spectacular use of composition. I love the way you chose to set the stairs from corner to corner balancing out the photo. Great silhouette with very crip lines. Wonderfull job!!