] [Thread] [Date] [Author]

["Gerard Madden, SE" <gmadden(--nospam--at)maddengine.com>]

For staggered steel trusses, I’m trying to nail down the R factor for seismic. Per CBC Table 16-N, it appears that this would be considered “Special Truss Moment Frame of Steel” due to the virendiel (sp) at the middle. Is that correct?

 

Are these treated as having a vertical discontinuity for the lateral system as well since they occur at every other floor on the same column line?

 

It appears that the hollow core pre-cast floor systems are the most popular for these. Since the diaphragm is critical to providing transfer of shear, are there suitable systems out there that don’t require a topping slab or have some seismic shear values….

 

Just researching this option for a low floor-to-floor story height application.

 

Unless I missed it, W12 and W14 columns are still the only ones acceptable for SMRF’s without testing, correct?

 

Thanks,

-gm