Looking through the NBCC I'm not seeing anything related to applying or accounting for any vertical acceleration due to seismic ground motion: just horizontal forces only. Am I missing something or is the 0.9DL combo considered to address that?
To any engineers familiar with the NBCC's seismic design: are there any provisions for including some portion of snow or ice loads as part of a structure's seismic mass? I looked through the NBCC and Alberta provincial codes and didn't see anything regarding this but I could be missing...
Thanks. I've been trying to track down a free copy of the CSA S37 document with no luck as all the pdfs of that code I've found via Google search are behind paywalls. All the articles I've found Googling Canadian ice loads have been academic research papers relating to marine ice floes impeding...
How does the Canadian NBC or engineering practice address the weight of glaze ice on structural components for vertical, wind, and seismic? The NBCC and Alberta Code I've got access to don't seem to even mention ice loading at all--which I find surprising given how much of Canada is so far...
Just to respond to everybody...
I asked SK Ghosh for guidance on the application of Omega for equipment anchorage. He basically said we should apply it per the letter of the code and that it was really ACI's, not ASCE's, call. So it appears we'll be reverting our spreadsheet back to the...
You would in generally always want threading Xcluded from the shear plane since that is an area of bolt with smaller net cross section--however in many cases the bolts are overdesigned and it doesn't matter (so Ncluded is OK). It all depends on your calcs.
Check the ICC report for anchor rod steel Fy and Fu. Those values should all be listed there. Those values are usually not of interest to engineers designing an anchorage because the concrete bond and concrete itself will typically fail long before the steel rods do.
I believe some of the new Simpson screws for attaching their new line of light gauge clips to structural steel will drive through 1/4" material. Teks is certainly the most commonly specified hardware though.
There are two tank design methodologies that ASCE7 Chapter 15 refers back to:
API-650 (mostly used for welded steel tanks found in tank farms)
AWWA D100 (water tanks of any material and occasionally elevated up on stands)
I've only anchored tanks per AWWA D100 but if you can get your hands on...
Back in structural dynamics we did a team project doing time history from El Centro for a 10-story steel building in ETABS. I think the El Centro record could be uploaded into it from some other site. It's been too long to remember now--but I'm sure if you Googled "El Centro time history record...
You should check AISC H3 (13th ed...not sure about 14th) for design checks. If you want to go real deep into it the torsion will add additional shear stresses at the extremities of the beam's cross-section. AISC has a design manual with lots of fun charts developed from diff. equations for...
I found at least a summary of the primary academic paper referenced in both Structure magazine and Enercalc help. The best I could tell was the formula was developed based on a best-fit regression of a bunch of FEA model slabs on grade loaded to failure--not real slabs. I'm sure Ringo being...
It might be addressed at the county level but we all figured it was done by local municipality building department--especially since some counties out west can be the size of states back east. San Bernardino County is just a little smaller than West Virginia for example. But I agree the local...
We tried a half-dozen neighboring towns with no success. The biggest town nearby, Palm Springs, listed "122.5Vult" on their site somewhere (someone else in the office found the page) but I'm not even sure if that means 122.5mph RCII Vult or 122.5% of whatever the IBC mapped value nearby would be.
