





Prospect Heights, Brooklyn
A set of fifteen-ton weights? I don't know what else this could mean.

Fort Greene, Brooklyn
A bit of web research indicates that they are indeed 15-ton weights. Check out the second photo and caption here:
http://www.ditzj.de/html/de/cranes/schmidbltm1500.html
Its a crane boys, what did you expect it to mean? Kilograms?