Transmission Towers- Staggered bracings
Transmission Towers- Staggered bracings
(OP)
Hi,
I have a quick question about a transmission tower I am currently modelling in PLS Tower. I dont have the drawing with me at the moment but I need a quick answer. I have attached a sketch to show staggered bracing in tower legs. Can someone please help me to understand what the L/r ratio for the leg is? If I am right it would be 2.4 in x, y and z axis (according to AS3995)? I think because buckling length for member L is twice length in both directions and there is a 1.2 factor in the standard as well (or any standard for the matter I want to know the principle).
If that is true, then whats the point of having a staggered bracing because buckling length is big, wny not have normal symmetrical bracing?
Many Thanks
RE: Transmission Towers- Staggered bracings
RE: Transmission Towers- Staggered bracings
Remember that.
Mike McCann, PE, SE (WA)
RE: Transmission Towers- Staggered bracings
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The name is a long story -- just call me Lo.
RE: Transmission Towers- Staggered bracings
But full-scale testing proved that staggered bracing wasn't as strong as theorized, so the codes added the 1.2 factor to compensate.