LearningAlways
Structural
Hello.
I've worked the majority of my career in Florida, which means I've never encountered seismic design. We priced a few jobs out-of-state, so I know the general framework, but have never gotten into the details on a live project which would be constructed. I work in the precast field.
That said, I'm reviewing another engineers calcs. I now work for a different company who has offices across the country. This engineer included collector forces for the wind case, this building is in FL so again no seismic. I've reviewed and performed dozens and dozens of wind analysis calcs in Florida but have never seen wind collector forces calculated.
My understanding is that collector forces act like drag struts and transfer load from elsewhere in the building into the shear walls. There's logic as to why he would include collector forces in the wind diaphragm design but it goes against what I've seen, and ASCE doesn't mention collector forces in any wind chapters only in seismic.
What is the difference in the way forces are transferred in a seismic vs. wind event that one requires collector forces and the other does not? Its not easily obvious to the non-seismic eye.
Please and thank you.
I've worked the majority of my career in Florida, which means I've never encountered seismic design. We priced a few jobs out-of-state, so I know the general framework, but have never gotten into the details on a live project which would be constructed. I work in the precast field.
That said, I'm reviewing another engineers calcs. I now work for a different company who has offices across the country. This engineer included collector forces for the wind case, this building is in FL so again no seismic. I've reviewed and performed dozens and dozens of wind analysis calcs in Florida but have never seen wind collector forces calculated.
My understanding is that collector forces act like drag struts and transfer load from elsewhere in the building into the shear walls. There's logic as to why he would include collector forces in the wind diaphragm design but it goes against what I've seen, and ASCE doesn't mention collector forces in any wind chapters only in seismic.
What is the difference in the way forces are transferred in a seismic vs. wind event that one requires collector forces and the other does not? Its not easily obvious to the non-seismic eye.
Please and thank you.