Our state structural engineering association helped with this study. Although it is for NH there are formulas for calculation of snowload with elevation and a methodology for how the snow loads were developed. It may be of use to you.
http://www.senh.org/wp-content/uploads/2010/12/tr02-6.pdf
I'll take a shot to answer your question. I am using the 2006 IBC as reference.
Section 105 states when you need a permit
Section 106 states what documents you need to submit for a permit
Srction 106.3.4 states that the building official is authorized to require that a registered design...
on page 5 of this reference they provide some displacement, velocity, acceleration, and frequency limits for computer systems:
http://www.vulcanhammer.net/svinkin/BLST-CRT.pdf
To answer your first question: according to our vibration consultant the maximum allowable accelerations to prevent damage to a steel building is 10 mm/sec.
Take a look at the RISA help file under "Modeling Tips" then scroll down to the section titled "Modeling Inclined Supports". I believe this is what JAE was refering to.
According to these guys (see question #27)
http://www.unistrut.com/DB/PDF1/Grating_FAQ.pdf
their grating can be used for a diaphragm.
I am not endorsing this use but simply pointing it out.
JAE, you're welcome. I would also look into design standards for tornado born missile barriers. A lot was done in the nuclear power industy in that regard. Good luck.
The best approach we have found so far is to consider the curtain rotating in rigid body motion. Then you can equate lateral and vertical moments to calculate displacment which will then provide the axial force in the curtain. We will be very conservative in applying "adjustment" factors to the...
One of our clients has requested a proposal from us to do the engineering to install a fabric curtain wall around an existing industrial steel building that currently has no walls. The facility is a metal recycling operation that recycles automobiles (they are shredded) and other metal debris...
If you select the rigid baseplate option in RISA base and your base plate is not thick enough to be rigid then your solution should not converge. That should tip you off that you need to increase the base plate thickness.
My experience is in engineering foundations for small turbine generators. These are installed on mat foundations. Manufacturers tell us to provide a "rigid" foundation without specifying what that means. Our mechanical engineers tell us to limit the foundation deflection to less than .25 inch...
I have engineered many pipe racks for power plant projects where the rack carried both main and aux steam piping. I also have experience with doing pipe stress work using Ceasar, Algor, Autopipe and other software.
My understanding is that if you model a support as "rigid" then the piping...
I received a copy of ASCE 11-99 "Guideline for Structural Condition Assessment of Existing Buildings" when I attended a seminar of the same name. The guide will not tell you have to determine load capacity but will help in determining what information you need, how to obtain it, and how to use it.
