This may not be totally LEGO legal, but hey it works. And even after all most a year of being built I could find no damage to my bricks. SO make these types of designs at your own risk, I take no responsibility if you stress your bricks too far and damage them.
LEGO Pre-Stressed Bridge v7
Scenery made from LEGO
COLTC Dispaly at the Great American Train Show Feb 2005
