1/14/2024 0 Comments Fink steel truss![]() Changing just takes me awhile guys, so bear with me. Looking at my Architectural Graphic Standards book Sixth Edition, with a Copyright of 1970, I guess it would be time to renew. More are using the Engineered Truss now that is manufactured with 2"x4" because of the Engineering behind it for the dead and live loads. Since Northern Maine as well as our Canadians friends have a good shore of snow load, most rafters and ceiling joist are almost always 2"圆" wether or not they are stick built simulation of a truss or not. This was the basis of the home built truss design. the angel of the fink chords were 12" rise to 3x the run. The Monoplaner trusses at the time would have had the first chord point at roughly 10’-11" for 2"x4"bottom chord. The plywood gussets were about two feet long for a 4 in 12 pitch at the overhang and three feet to four feet long on the plumb cut, depending on the estimated load, sometimes that was applied on both sides. Therefore, you actually ended up with an over Engineered Truss Manufactured by our Fathers of Time. They proceeded to improvise the steel connector plates with plywood 5/8" thick for gusset plates and chose to stay with the oversized lumber they were using as was normally used for stick building. Since the factories were few and far between, older Carpenters caught on to the fact that Engineered Trusses were faster and more economical. guys and hope you are all doing well.īack in the 1970’s, people (contractors) started simulating roof trusses that were coming out as Engineered Trusses. It’s all a WAG just based on a few photos that don’t tell the whole story, and I’m really just thinking out loud off the top of my head … It may have been a post type configuration (essentially like a braced rafter) with another series of members added if there were issues, as the ceiling members look a bit large for a fink truss and the wood grain on the vertical members looks a bit different from one row to the next … but that may just be an optical delusion.Īlso the connections at the bottom aren’t really visible, and it’s possible there are bearing walls near the connections at the ceiling that would make the braced/post type configuration a definite possibility (particulary if there are larger ceiling framing members). It does look like a fink type configuration, but something does seem a bit off and I would have expected to see more plywood plates at the connections. Since it was reported to be 40 yrs old I was thinking more along the lines of an older site built truss (or truss like configuration) without metal plates, as the metal plate connectors is more of a modern application. If in fact, it were a truss design, signs of connector plates would be observed. I do no see any modifications to a designed truss system. I believe that these photo’s indicate site built roof framing in an obscured manner to simulate the Fink Truss design. I am curious at this point as to why the nails are so long and why what appears to be plywood sheathing on spaced boards.? Pictured here is the common fink truss and possibly should have been a double fink. It is then supported by end beams that carry the load to the walls below or somewhat in that order. Better balance.Ī ridge beam is normally used for carrying the weight of the rafters or the roof. The chords displayed in the picture should have been opposite of the plywood gusset at the ridge. I know, because that is the way I used to build them in the 60’s with my father. In this Era, it was typical to use full 1" boards rough sawn usually to provided the chord bracing. ![]() The angle should have been reduced and one more added chord on the other end. These were obviously home built trusses and the plywood gussets at the peak, were common to be 5/8" plywood as such and the first of the truss chords should have been no more than 30 degrees and this pictures show that to be exceeded. Like I have always said, pictures do not give you the thousand words unless they are focused on the whole picture.
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