I want to close the recent examples of trusses by providing a sampler of truss designs. This is far from encyclopedic. In fact, this post is limited to planar trusses.
First, however, let me give you a link to an online calculator. I checked it out on the Howe truss with a snow load.
As you can see, I scaled the loads by a factor of 10. I had to, for the program – not a big deal.
There are plenty of websites with information. You can search for yourself… you could start with the usual wiki article – the merit of which is that it has a lot of external links.
Okay, what do we have?
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