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Hello, I am querying about an interpretation of ASCE 7-2002 as referenced by the NYC code. In 9.6.1 the exceptions indicate components with Ip of 1 are exempt from the provisions of the section for a Category C building. Later it says that one should address these items when failure could...

Hello- I wonder if some of you RISA Tower users or other experts can help me understand a requirement. The requirement states "maximum sway of 0.4 degrees from the top or 2% of the height, whichever is less". I can certainly calculate the deflection due to wind and compare to 2% of height. I...

Hello- I don't know if this is the right place to ask, but here goes. I am designing a support system for some equipment suspended within a chemical reaction vessel. I am comfortable with the gravity and buoyancy loads, but am at a loss as to how to determine what lateral loads would apply...

Hello- I am looking for contacts who can help with some ANSYS issues we have. We are in WA. Might need someone to come to the office. Thanks. rd78

Hello- We have an agency enforcing the requirement than ceilings over 2500 SF have a seismic separation joint with a gap determined by the designer? I can't seem to find anything on that. Any experience out there? Thanks. rd78

Hi all- I'm having some dialog with colleagues regarding the appropriate R value to use per IBC or ASCE 7. Specifically I'm looking at free-standing large diameter fiberglass (FRP) tanks. We get into situations where these things need to be designed with seismic loads "per ASCE 7" or "IBC...

I'm looking for a mathematical approach for determining the distribution of wind pressures around a large diameter cylindrical structure. I know there are lots of aerodynamic factors, gust factors, and IBC shape factors. I am wondering if there's an equation to go with the figure in Gaylord...

I'm a little out of my league on this, but I'm looking into the amount of heat lost through the wall of a chimney liner as the hot gas moves upward. It sounds like a textbook kind of question, but beyond me at this point. Can someone point me in the right direction? Thanks.

Hello- I know the concept hasn't quite taken hold, but I wonder what experience is out there for designing bridges from composite materials. I design custom FRP equipment for a living, but as a civil/structural engineer I would like to know of applications in the structural realm and what...