Remarkable

 

Typically I work to vary my entries, to switch up themes from go to go, so as not to bore the readership or disappoint anyone, including myself.

However somehow, just like déjà vu all over again, just as happened last month, another historic wooden through truss, this time rehabbed not a decade ago, but literally at the dawn of this one, has been removed from service.

My continuing ire about this oddly continuing story, is not so much about how this came to pass. (from my perspective, this is less than surprising) It is more about how it might be possible, absolutely no one is asking why or pointing out the absurdity of it all.

Part of my incentive in writing this web-log, and likewise, part of why I engage with wooden bridge enthusiasts through “social media” is both to lend others a view to their interest from my inside perspective, and to also lick a finger and test the winds. This to try to understand what it is aficionados of this aspect of our built transportation heritage bring to our table.

Remarkably, what I seldom see in this community is anyone asking why. And the why in why is it joined wooden through truss rehabilitation’s are sometimes awarded to the wholly unqualified is a beyond big why.

Likewise the design of such rehabs executed by firms with zero background in such structures is equally absurd. Yet seldom, if ever, does anyone ask why in either circumstance.

I see contracting a construction firm that specializes in building concrete deck bridges, (simply because they know how to bid public works projects and are silly enough to think they’ll be able to work it out as they go along) to rebuild a joined timber truss as akin to dropping off a car in need of a transmission rebuild at an appliance repair shop.

I’ll not be apologetic about pointing out how patently absurd it is to point a crew of concrete form carpenters at something as complex as a joined timber truss. Wholly different trades, different tooling, different skill sets and a far differing knowledge base.

The only thing about this sad reality that is remarkable is the wonder in how it is possible this both continues to happen and how it is possible next to nobody is asking why?

 

000_0017

Bridgewrighting is advanced carpentry requiring precise high tolerance fits to avoid crush of wood grain under load and distortions to intended geometry in truss-work

100_2282

This specialist branch of carpentry requires specialty power tooling and the skilled use of hand tooling once standard in the common era of wooden through truss construction though now little used

100_4427

A Trait de Jupiter / Bolt ‘o Lightning multiple abutment Bottom Chord tension splice executed by the author – The need for precise uncompromising fit in such circumstance being obvious.

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About Will Truax

I'm a timberframer and preservation carpenter, and regularly work on Covered Bridge restoration projects. Bridgewrighting can be a tough row to hoe, for a myriad of reasons. From scheduling issues to differing opinions and philosophies on what is appropriate in methods and materials, to multiple jurisdictions still not sufficiently vetting bidders resumes - Which is to say, just because a company is on that state approved list and capable of building that seven figure overpass, this does not mean they are capable of restoring a wooden bridge... So, I have much to say about all this and more - And despite my tough row observation, I promise not to whine. View all posts by Will Truax

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