Recent content by crozroz0000

maramos, I agree with ron. I would also apply the corner zone wind loads to the stepped corners. In this case I might use the same zone width based on the 80ft-or you could use width of the stepped walls if needed.

We have done this quite a bit. The real time waster is trying to modify your beam/column/gridline locations in Risa. I usually get the model pretty close to perfect, then export to RISA, and see where the problems are (columns not on gridlines, beams not attached, etc). Then I go back to...

SteelPE, you may want to download an excel file called 'IBC 2009 & ASCE7-05 edition (Revised 7/26/2011)' from http://seaoc.org/software.html One of the tabs is on perforated shear walls.

Risa has a great technical support staff. Risa 3d is pretty user friendly-it is spreadsheet driven. You can copy paste to and from spreadsheets. I use Risa Floor mainly when I have composite beam/slab. Risa floor and Risa 3d work pretty well together. Floor does gravity, 3d does lateral.

I was thinking about using all of the walls to find the center of rigidity. This way I could get correct Torsion due to lateral load in either direction. If I neglect them in my center of rigidity calculation, I think my torsions will be off. Am I thinking correctly?

Thank you, Dave.

Attached is a crude drawing of a c-shaped 8" reinf. CMU wall. 50' x 250' bldg 2 story. Roof Flexible, Floor rigid All thick walls may be shear walls. I am looking for the shear per foot for the walls. I know there will be torsion introduced because of the C shape nature of the walls. I am...

Thank you Mike and JAE. JAE, that is a clear explination of the code. That helps a lot. My next question: I did not create this spreadsheet and it is locked. I am having trouble finding out how the Fpx column is calculated. If I could only remember how to use sums (Fpx=(nSUMi=x Fi)/(nSUMi=x...

Equation 12.10-1 in Section 12.10.1.1 Diaphragm Design Forces of ASCE7-05 has the following equation: Fpx=(nSUMi=x Fi)/(nSUMi=x wi)*wpx It has been a while since college. I looked at Daniel T. Li's Seismic Analysis Based on CBC 2007 Chapter A found at http://www.engineering-international.com/...

We have 50 feet of standard brick. Supported laterally by studs/ ties. Only used as veneer. We have checked stress due to dead load... it is fine. Is there anything else I should worry about?

WOW!!! Vaughnmr, that site is perfect. Exactly what I was looking for. You helped a young engineer out. Thanks. In Christ, Adam

WONDERFUL!!! That is exactly what I needed. Thank you whyun

I'm looking for a simple retaining wall program. (0-$50) Any favorites our there? I need it to do surcharge, water and dirt...

Great resource! Thanks unclesyd

Thanks steve1. That is good to know...great advice. So I will definately need to get formal training first. Then I'll need to do some learning on my own (by way of Autodesk tutorials and manuals) Does any one know of an unauthorized trainers (might be cheaper than authorized)? Does anyone...