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  1. smartin

    Impact Factors in International Building Code

    Thank you both for you input. I have one additional question. If you are going to factor loads for LRFD design, would you incorporate similar to the way it is done for crane rails (vertical impact). Assume dead weight of machine is 15 kips and impact is 50% of the dead weight. Would you do...
  2. smartin

    Impact Factors in International Building Code

    Does anyone know the correct way to apply the impact factors for machinery listed in Chapter 16 of the IBC? Factors are provided for elevator machinery, light machinery, shaft- or motor-driven, etc. I have seen the computation done several different ways and I'm confused as to the correct way...
  3. smartin

    ASCE 7-05: Rooftop Structure 1.9x Wind Multiplier question

    Thanks all for your input. I was concerned that there would still be increased turbulence above and beyond the standard wind pressure at that height. Does anyone know why they cut-off the requirement at 60 feet? Is this the height to which they have testing?
  4. smartin

    ASCE 7-05: Rooftop Structure 1.9x Wind Multiplier question

    I have found this discussion quite useful, but I'm an engineer in Florida working on designing the anchorage for roof top units on a pair of buildings that are 165' in height. Do any of you have any experience with what to do in this case. Prior to ASCE 7-05, the buildings less than 60' limit...
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