View single post by mwiz64
 Posted: Sat Nov 10th, 2012 10:01 pm
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Joined: Mon Mar 26th, 2012
Location: Fenton, Michigan USA
Posts: 1330
In the beginning of the first video you can see them laying ties and gauging the rails but if you look a little closer you can see the surveyors out in front laying out the centerline. There is a guy facing away holding the range rod. If you look farther up you can see the instrument man putting him "On Line". He waves one quick wave with his left hand. The rod man then moves the rod slightly left. He waves it again and the rod man moves again and then the instrument man waves both arms up and down, meaning the rod is exactly on the centerline. Generally the rod man then outs a nail with a ribbon on it into the ground at that location. If you like I can explain how they lay out curves too.


Last edited on Sat Nov 10th, 2012 11:15 pm by mwiz64

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