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  1. hello2006

    calculate force distribution

    Hello Everybody, I have a question about force distribution calculation. Suppose there is a rectangular with a force perpendicular to its surface at some point, but not center. how to calculate the force distributations at the four corners of the rectangular? My problem is actually a weight...
  2. hello2006

    ceiling distance from the top of pipeline

    Hi Everybody, Just want to confirm if there is minimum distance requirement between ceiling and the top of pipeline? My pipeline is an cooling oil pipeline suspended from ceiling with 3.5" diameter. Another question is what kinds of pipe material normally can be used for this kind of pipe? My...
  3. hello2006

    design metal frame for fan and motor

    Hello everybody! Would you please tell me what book is good to learn about metal frame design? I am trying to design a metal frame base for fan and motor. I am thinking if there is a book which describes the common rules or steps for designing metal frame. After I learn this, I can not only...
  4. hello2006

    how to calculate the seismic force for pipe?

    Hi Good morning everybody! I am calculating the force of seismic for designing pipe support. I have HPGA =0.44 g. Can I simply use F= 0.44*g*weight of pipe? Because I think F=am, here a=0.44*386 (g=386 in/s2), therefore, F=0.44*386*weight, Is that correct or I should use what formula to...
  5. hello2006

    the meaning of "HPGA with a mean of AEF 1/1000"

    Hi Every expert, Would you please help me to explain " the horizontal PGA with a mean AEF of 1/1000 is 0.44 g."? " that with a mean AEF of 1/10,000 was 0.88 g"? I do not understand these two sentances. I do not understand "a mean of AEF of 1/1000". What is "AEF"? what is "0.44 g"? How to...
  6. hello2006

    the difference between direct drive fan and belt drive fan connection?

    Hi everyone, would you please describe something about the difference between direct drive and belt drive fan. Compare their good and bad function please? My fan is 18,000 cfm. But belt drive gave lots of trouble, therefore, want to change to direct drive. I am not sure what the benefits will...
  7. hello2006

    how to design a pipeline with seismic effect

    I am trying to design a pipeline. it includes a big size valve, 12 in. the pipeline has to endure seismic effect. I do not know how to start the work. where to learn how to design this pipeline. thanks very much for any clue!

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