Rivets and nuts

http://farm6.static.flickr.com/5208/...23b875e3_z.jpg

a detail shot of one of the trusses of the railroad bridge showing rivets and nut fastening of the beams

nice. too bad about the blown out snow. The bottom half would make a really cool picture all by itself :) (if you don't mind me saying)

Cheers Bambi