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  1. steve1

    case study snow load regions

    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
  2. steve1

    Form 330

    http://www.gsa.gov/portal/forms/download/21DBF5BF7E860FC185256E13005C6AA6
  3. steve1

    How irregular is too irregular?

    http://www.structuremag.org/article.aspx?articleID=1227
  4. steve1

    Company Liabilities for Using a Proffessional Engineer

    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...
  5. steve1

    Effects of pile driving vibrations on computer servers.

    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
  6. steve1

    CMU allowable unbraced heights

    http://www.structuremag.org/article.aspx?articleID=663
  7. steve1

    Wood Supporting Concrete

    http://www.structuremag.org/Archives/2006-4/D-CUPD-IBC-Wood-Framing.pdf
  8. steve1

    Procedure for vibration evaluation of concrete floor systems

    Here's a lonk to the ATC Design Guide http://www.atcouncil.org/vmchk/Floor-Vibrations/Minimizing-Floor-Vibration/flypage.tpl.html
  9. steve1

    Existing screening building with vibration issues

    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.
  10. steve1

    Draw plate openings

    You can delete individual or a group of elements to create the opening.
  11. steve1

    Joint Restraint for Local Axis

    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.
  12. steve1

    Bar Grating as a Diaphragm

    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.
  13. steve1

    Falling (slinging) Ice Shields

    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.
  14. steve1

    Falling (slinging) Ice Shields

    Perhaps this will help http://web1.msue.msu.edu/cdnr/icethrowseifertb.pdf
  15. steve1

    Wind Load on Fabric Curtain Wall

    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...
  16. steve1

    Wind Load on Fabric Curtain Wall

    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...
  17. steve1

    Rigid Baseplate?

    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.
  18. steve1

    Thick Footing at Heavy Machine (No impact - High Deflection Control)

    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...
  19. steve1

    Modeling anchor points in pipe racks

    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...
  20. steve1

    Guide to Structural Condition Assessments

    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.

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