It seems wrong to have the beam angled liked that, IDK but it could be unstable with the hangers on an angle. Why not hang the beam normally and use wedges to mate it to the stringers?
@parkerblt
5 күн бұрын
Seems wrong doesn’t seem like a very good argument. The forces in play are perpendicular to the stringers, not the glulam beam. I ran it by my engineer. (Change my mind..😊)
@parkerblt
4 күн бұрын
It’s surprising how people react to those 2x10s placed perpendicular to the stair stringers with the joist hangers mounted accordingly - instead of having the joist hangers properly plumb. My guess is that Simpson engineers would simply shake their heads based on how they were designed in the first place. They are, afterall, “hangers” not “leaners.” My (bonehead?) way of visualizing the forces at play was to think of the stringers as anchored at the bottom (like a pivot point) and - If I was a 1000lb version of Shrek lumbering up those steps, the “forces” in play - should the previous top attachments fail - would be (approximately) perpendicular to the radius created by those stringers still anchored at the bottom. I suppose in reality it’s more like the weight of the entire stair-set being pulled directly downward by gravity, not as I visualized it swinging downward from the top like a hinged plank at the moment of failure. I *did* consider both of these views when I was figuring out how best (for me, working solo) to bolster the dicey attachments that my framers left at the top of those steps, and ripping the double 2-by planks to the proper angles and then getting them installed seemed both harder (for me) and more time consuming. Furthermore, since I wasn’t in a position to calculate the actual loads and forces at play - I simply guessed that doubled 2x10s anchored with properly nailed Simpsons would be enough overkill that it wouldn’t matter if I was wrong or right with my “visualization.” And besides, once I box them in (like a faux glulam) it won’t look weird to anyone who cares. My (bonehead) hunch is that the actual risk might be that Simpson joist hangers are substantially weaker when they are not hung plumb - that’s why I chose the hangers that are for 2x10s-2x12s and NOT the smaller ones they sell for 2x8s-2x10s. I know this might be silly thinking and entirely based on the “she ain’t goin’ nowhere” principle. But seriously, I now believe that my set of stairs ain’t goin’ anywhere and I wouldn’t hesitate to have four guys carry a piano up them.
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