Can someone tell me what the following state means:
“When you perform the response spectra analysis (RSA), at least 90% of the model's mass must participate in the solution.”
It seems to me that the whole structure is in motion in all modes, so that 100% of the mass is involved in any mode...
Hello,
I’ve written an Autolisp routine which uses the “command” function. It works perfectly three times, with no errors and gets back to the command prompt. The fourth time I use the command I get an error: “Fatal Error, Commands may not be nested more than four deep”.
I have looked to...
List:
Here's one for the welding experts:
In the old AISC 1993 Spec. (J2.2a) you used to be able to
get extra effective throat on a fillet weld if it was done with the SAW process. In the 2005 Spec. this has disappeared and been replaced with a testing
requirement. This could apply to all...
List,
I have an application where I wanted to weld a 50ksi wide flange (W8x40) to the face of a 1.25” thick 36 ksi plate and fully develop the 50 ksi wide flange. (it’s part of an ordinary moment frame and will be used in earthquake country) My client wants to do it with a CJP. I want to be...
Hello,
This has to be a dumb question, but I have several authoritative wrong answers so I'm coming to the well.
For LRFD design of fillet welds, you obviously have to consider shear rupture through the throat. (0.75 x 0.6 x Fexx). But don't you also have to consider shear rupture or...
Hello,
I have a question about liability. I have a PE license and most of my experience is in industrial building design. However, I want to start doing residential design using timber. I have an opportunity to do some work for a couple of other PEs on a contract basis where I wouldn't use...
