TFD> bridges-> can't walk on the medium wood bridge

[RoDent]

Can't figure out why this wooden medium size bridge doesn't allow you to walk across it? I always fall through! The 2 other types of bridges work fine but i want to use the wooden one as a walkway underneath the big concrete bridge. (by turning the wooden bridge upside down....pitch 180 degrees.) Even without changing the pitch and keeping it normal...i still fall through the dam thing! Is this bridge meant to be just something nice that you can look at and there for useless other wise? And i don't feel like placing walls underneath it to stop peeps from falling through. And going a little of topic...just want to show my support for all the troops overseas, keep up the good work, and hope you all arrive home safe! My thoughts and prayers are with them all, and to there families.