Black Canyon of the Gunnison -einmal anders und historisch:
http://www.ghostdepot.com/rg/i…on%20truss%20gs%20p72.jpg
http://www.ghostdepot.com/rg/i…anyon%20truss%20atc18.jpg
http://www.ghostdepot.com/rg/i…ss%20bridge%20strview.jpg
http://www.ghostdepot.com/rg/i…p%20view%20truss%20pc.jpg
Gruss
Rolf