You would need to do your own research on the degree of accuracy,
but these must be fairly accurate as they are used for highway
department and high f-number concrete work. They go up to 24
feet.

http://www.bontool.com/product1.asp?P=MAGSCREEDS
___________________________
Keep the whole world singing. . . .
DanG


"Jay Pique" wrote in message
oups.com...
Hey, anyone got a suggestion for a 16 foot long straightedge?
I'd like
to be able to use it for template routing, rather than jointing,
the
edges of long panels and boards. I'm thinking an aluminum
extrusion
would be the way to go.
JP