Historic Wood Truss
Historic Wood Truss
(OP)
I have an existing building built in the early 1900's (I believe) that has what appear to be wood roof trusses. They are spaced 13' o.c. and span around 48'. The typical truss is around 6' deep and the top and bottom chords are (6) 2x11's. Between them are webs that make an X at 45 degrees which are (8) 1x8's. The web members and chord members appear to alternate and be connected that way. When I first saw them I didn't want to consider them a truss due to the unconventional web configuration and tried to get the bottom chord carrying an attic load and top chord carrying the roof load to work, but they were no where close to working, so it would appear that they would have to work as a truss to work at all. So after doing a little searching I'm seeing picture of old timber truss bridges with this non conventional X web configuration. Has anyone ever encountered this type situation in a building. I'm still hesitant to look at it as a truss, but looking for input from anyone on my situation.






RE: Historic Wood Truss
RE: Historic Wood Truss
I like to debate structural engineering theory -- a lot. If I challenge you on something, know that I'm doing so because I respect your opinion enough to either change it or adopt it.
RE: Historic Wood Truss
RE: Historic Wood Truss
RE: Historic Wood Truss
What is the focus of your effort on this? Are the trusses failing or something?
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RE: Historic Wood Truss
RE: Historic Wood Truss
For joint remediation, perhaps you could install drift pins etc through the joints. Octuple fastener shear should work wonders.
I like to debate structural engineering theory -- a lot. If I challenge you on something, know that I'm doing so because I respect your opinion enough to either change it or adopt it.
RE: Historic Wood Truss
Edit: For general guidance on how to analyze a Town Truss see pages 12 thru 21 at this link: Structural Analyses of Two Historic Covered Wooden Bridges
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RE: Historic Wood Truss
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