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  1. scully44

    math problem (sinusoidal motion)

    Its not a homework problem and I am perfectly capable of following the solution along. I don't deal with these sort of equations on a regular basis as 99% of my work involves statics. I was hoping for a little help to save me the time of digging through text books I haven't looked at in 10...
  2. scully44

    math problem (sinusoidal motion)

    Does anyone know how to solve the following equation: -A*2*PI/6*COS(2*PI*t/6)-B*2*PI/18*COS(2*PI*t/18)=0 Where: A is a constant B is a constant t = time Find: all values of t between 0 & 18 such that the above statment is true. the function is velocity of a point subjected to...
  3. scully44

    wind uplift

    Thanks for the advise. After listening to your comments I think applying the increased wind pressure only over 1/10 d length is the intent of the code. Otherwise I think the code would just specify a 1.7 x base wind pressure for the entire roof. I would also like to say that all of you seem...
  4. scully44

    wind uplift

    I am working on a job in massachusetts. The Mass code requires that parts of roofs subject directly to wind pressure that are within a distance 1/10 of the least dimension of the building or ten feet wichever is less of the peak or eave be designed for an uplift of 1.7 times the base wind...
  5. scully44

    built up member weld

    I have a client that has to W8x21 beams stacked one on top of the other. My question: is there an AISC prequalified weld I can use to attach the flanges together. The ones shown in AISC 9th Ed. Do not show any attaching 2 plates along their edge. The weld will only have to carry the...

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