Freestanding Walkway Canopy Sidesway
Freestanding Walkway Canopy Sidesway
(OP)
I have an aluminum freestanding canopy which is designed with cantilevered columns in caisson foundations. I have no fixity in my beam/column connections and solely rely on the cantilever action for bending. If no nearby structures would cause an issue for sidesway deflection due to wind loading; what would a reasonable recommended maximum deflection be?
Sizing columns for strength I can make a relatively small section work which will result in about 2 1/2" of sidesway on an 11' tall column.
Sizing columns for strength I can make a relatively small section work which will result in about 2 1/2" of sidesway on an 11' tall column.






RE: Freestanding Walkway Canopy Sidesway
RE: Freestanding Walkway Canopy Sidesway
Thanks
RE: Freestanding Walkway Canopy Sidesway
RE: Freestanding Walkway Canopy Sidesway
RE: Freestanding Walkway Canopy Sidesway
RE: Freestanding Walkway Canopy Sidesway
I think 2.5" is too much, so maybe an inch. If your deflection is that much, the rain will be sideways, so the people using the walkway won't be worrying about a bit of deflection.
Just curious, why is the canopy so high? The higher it is, the less protection it affords from rain.
RE: Freestanding Walkway Canopy Sidesway
1) Including P-delta effects in the column design if there will be heavy snow combined with slender columns.
2) Giving some account to foundation flexibility as that's really all that you've got here.
3) Keeping your period within a sensible range so that you don't get some terrible resonance vibration thing going on in the wind.
I like to debate structural engineering theory -- a lot. If I challenge you on something, know that I'm doing so because I respect your opinion enough to either change it or adopt it.
RE: Freestanding Walkway Canopy Sidesway
RE: Freestanding Walkway Canopy Sidesway
RE: Freestanding Walkway Canopy Sidesway
lateral displacementangle of rotation at the top of the caisson?