The owner of a building is replacing a roof cooling tower that is currently supported on four 12"x12" concrete pedestals. The new cooling tower has a smaller footprint, and we were hired to provide structural steel support framing for the cooling tower. I was hoping to get some input on a couple...
271828: I was hoping you would see this thread. I've read many of your previous comments on the topic, so I am glad to get your input. It's a little unintuitive to me that the vibration amplitude is too small to engage new unstressed elements, but I am satisfied by your response. Thank you for...
WARose: You're absolutely right. For our proposed retrofit, the beam welded below the joist, DG11 says, "If this type of stiffening is used for open web joists or joist girders, the effects on shear and eccentricity on stiffness need to be evaluated using the finite element method." We've done...
Thank you all for taking the time to offer your expertise.
oldestguy: We could likely move some things around on the ground floor to provide a few extra columns. We're trying to not to interfere with the floor plan, but we can if we have to.
structSU10: We visited the site and felt the...
We’re working on an office building that is experiencing floor vibration problems due to walking (that is, people walking, not the building). The building is 20 years old, and we are told there have not been complaints in the past. The interior was redone in the last couple of months, so the...
