05-22-2010, 07:49 AM
well went to the FT. Laramie historical site and found that it is a Bowstring Truss not a Arch type and there are many still standing today several still in use as a road bridge most as foot traffic or closed to all traffic . the top pices are for wind braces and some like the FT. Laramie one are elevated for clearance the longest one still standing from what i can find is 147 ft span.