In a residential basement. It goes from one end of the beam to about two thirds down.
The homeowner has since installed new support posts.
Was this some way of supporting the post through upward tension? Have not seen this before.
My guess is that they tried to fix a sagging beam with it by putting tension on the cable and the plate with the angle was under the beam. tightening the cable would put upward pressure on the center of the beam but with the low angle there would have to be many times more tension in the cable that the upward force it would provide.
If they have installed posts, I would say the cable is moot any more.
Spoke to the homeowner. Yes it was used to tension support the beam. And no, it probably didnt do anything at all. He said it was there when he bought the house but who knows.
In a residential basement. It goes from one end of the beam to about two thirds down.
The homeowner has since installed new support posts.
Was this some way of supporting the post through upward tension? Have not seen this before.
so the ho installed posts, so all is ok, unless the ho is a p.e., do not cut, remove, one fu#king thing, for some reason some one thought puting this under tension was the right thing to do, get pro help
Its loose now. It's not currently under tension. Im just framing some walls, Im not engineering his house. Thats not the only scary thing in the basement but was certainly the most interesting.
To get lift you would have to have a much more significant angle and a much larger offset undee the beam. It the angle block at the center were 3' tall you could get some lift but not at 3"
Not sure exactly what I am looking at from camera angles. If there is a support in middle between cable and beam wouldn't it be a king post truss? I have seen this on bridges. Recently repaired roof system made with king post trusses. Note that fasteners are heavily loaded when there is small angle between beam and tension member.
I work at a house that has 2 of those on steel beams in the garage , 24' or so span. There is a piece of 6" sq tube welded to the middle of the beams and the cables go under them. No posts at all in the garage
I think it may have provided considerable support if the sag was jacked out of the beam before it was tensioned.
My buddy had some flimsy strait axels on his boat trailer, his old man told us to weld a short length of 1" angle in the bottom middle and run a 1/4" rod end to end welded in the middle and both ends.
no deflection after that.
When I use to lenghten truck frames we would do something like that only with flat bar to make the frame stronger and not bend under a have load. Also pre stressed concrete bridge beams are make with the cable very tight then when done it causes the beams to bow.
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