One thing I have finally realized is these cg barns with common purlins essentially have NO PLATES!They are possibly the only building types in the world without plates?
Jim
Housewright:
The no plates thing is why I came here in the first place. It really flies in the face of things for sure. Will told me he thinks that I'll start seeing more and more of these CGs here as I look around-- and I think he's right. I've been perusing old photos and noticed a few more of the barns I was in here last winter are CG typology.
I guess I didn't really notice it until I first went to visit the second barn we toured... those girts are really dropped. This made me realize the whole thing. And because the roof decking in that barn is supported by purlins on the
outside of the building, it was especially odd... from inside I was like, "where are the plates!"
With most CG buildings-- newer ones, like the last barn we toured-- there is just a teeny "plate" at the eave that's visible from the inside. But these "plates" are really just nailers for the boarding/ roof deck... they don't connect the building or really stiffen the frame. BUT you can see them and I think they register subconsciously as "plates." But they're just nailers, you know?
This is really neat stuff. (the closer you look the more you see, for sure!!!)
It's interesting that Tim is starting to "see" more CG buildings in his area. This could be that he's now paying close attention to the "plate" region.
I think we all have to come to some kind of definition on what a CG building really is. I tried this a page or two back. I think a CG has a top girt as principal bent connector, and IF it has plates, they must be clearly interrupted... wholly between the crossties.
What do you think a CG is?
