Photo taken by Jason Smith in December 2014
BH Photo #314308
Of course I don't think nor did I say you were a failure. My point is that the action being taken is not sufficiently effective - why have the emails you just described yielded limited results? Years ago, bridges were frequently reused; what changed? Considering the amount of effort you have expended and continue to be willing to expend, you deserve more wins.
I'm suggesting that we may be looking at this incorrectly. I don't know the answer, but suspect there is one considering a restored historic pony truss would have been a better solution here - both cost-wise and the end result.
What is the process used by these various groups in selecting a bridge and who chooses what they need? I suspect that there are members of this forum that each have knowledge that will add pieces of the puzzle that may produce that answer. I'm thinking that it should be possible to create an approach that would change the system to have the historic bridge reuse option come up automatically during the design process.
Things are changing. More is being revealed. IOWA Conservation Boards are a dead end. They use tax payer funding on pet projects and don't seem to be very transparent.
More news soon.
Art I have been busting my butt for years trying to get involved with trail projects during the design phase to let them know that reuse of historic bridges is feasible. I sent an email to EVERY single Conservation District in Iowa... and got little to no response whatsoever. I have had zero luck with repeated dead ends. So if you think I am a failure, that may be warranted, but it would be more productive if you could present a solution.
I'd look at it another way. The entity that put up that bridge was interested in having a historic looking bridge and went through the extra expense of doing so.
I consider this our (the preservation community's) failure because if the individual had been aware that a restored, historic bridge was a safe, cost effective and practical solution, there is a strong possibility that a historic bridge would have found a home.
While a number of individuals, me and you included, are working hard to save old bridges; the message that these bridges are a good solution for new applications is not getting across to the average planner/ designer/ administrator that is jobbing out the work. Somehow, that needs to change in order to increase our success rate.
If you really want to know the truss type for this bridge, I believe it to actually be a Howe truss because of the inclines of the upper chord...look up roof truss types, and you'll find that this exact configuration is a Howe. The diagonals actually are pretty much perpendicular to the upper chords, and the verticals are angled outward with respect to the upper chord, jus as a Howe with a horizontal upper chord is configured.
When you reuse a historic pony truss you can make it whatever width you want, or simply put a narrow deck on it. Its not a big deal either way.
No Nathan, this bridge is definitely no joke. If you fly to Iowa next time and happen to visit the Colonies, you can find this bridge off Hwy. 220 going west, leaving Lily Pond and entering Middle Amana. I sympathize with you because of your argument and totally agree with you, yet the logic behind this was to accommodate a bike trail, which is rather narrow. And unless you shorten the width of the truss bridge, having this bridge there does make sense. You have to give them credit for mimicking a Kingpost design. I had a hard time trying to figure out what truss type it was until visiting it in person during a morning walk around Lily Pond. My two cents on this topic. ;-)
"The webmaster of this website has provided users with special classifications for modern truss bridges like this."
Yeah it's ...
Was this bridge posted as a joke? It is one of the dumbest bridges I have ever seen. Not only are Continental Bridge Co. MOBs the Walmart of bridges, someone superimposed fake diagonals on top of a standard MOB apparently to make it look like a Kingpost. The attempt did not improve the appearance of the bridge and only made it look dumber. Next time, get a company like Bach Steel to relocate and restore a historic bridge... or even rivet together a replica historic Kingpost from scratch.
Also, as a reminder, the webmaster of this website has provided users with special classifications for modern truss bridges like this. For those who feel compelled to add MOBs like this, please classify the truss type using the "Modern" group of trusses. These can be found at the end of truss configuration choices given when you are adding a bridge. I have made the change for this bridge.