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Recent content by jmy61

  1. jmy61

    Moving, rack, and equipment loads on elevated floors

    Thanks to each of you for your reply. Because my initial post was getting so long, I minimized the extent of the details I provided. I do have some of the information you mentioned in your replies. In our initial meeting I told the Owner that at a minimum I will have to visually asses the...
  2. jmy61

    Moving, rack, and equipment loads on elevated floors

    I have been asked by a client to verify the adequacy of the second level floor in their manufacturing facility to support equipment, storage rack, and fork truck loads. The facility was initially constructed in the 1950's and multiple additions were added through the 1980's. The original...
  3. jmy61

    concentrated loads on elevated concrete floor slab

    Thanks for all the input. Lion06, yes the slab is a constant thickness of 5 inches.
  4. jmy61

    concentrated loads on elevated concrete floor slab

    Thanks SteelPE. I am not familiar with the "USD catalog" that you reference. Can you provide a little more info. regarding the catalog (who publishes it, where I can get it, etc.). I have a number of references, but I am not familiar with that one.
  5. jmy61

    concentrated loads on elevated concrete floor slab

    I am analyzing a 40 year old two-story structure that is to support new, heavier equipment on the 2nd level. In addition to the new equipment the 2nd level floor will also support rack storage and be subjected to wheel loads from forklifts. The 2nd level floor system consists of a reinforced...
  6. jmy61

    dissimilar metal protection

    Can anyone tell me if dissimilar metal protection is required between aluminum and clay masonry? If so, any suggestions for what to use? I am mounting aluminum plates to the face of exposed clay masonry walls. For aluminum embedded in conrete I have used black mastic (i.e. roof tar). For...
  7. jmy61

    pipe bridge and supports

    Thanks for your responses. My pipe loads are very light due to there being only a few small diameter pipes and conduits and due to the transported material being very light weight. Even with moment connections between the joists and frames and fixing the column bases, I am still getting large...
  8. jmy61

    pipe bridge and supports

    I am designing an exterior pipe bridge and trying to decide the best way to provide lateral support in the 70 ft. direction while allowing for thermal expansion of the bar joists. The pipe bridge consists of two bar joists located approximately 30 feet above grade and clear spanning...
  9. jmy61

    Pipe racks

    I am designing pipe racks and their foundations to support an overhead material conveying system. The racks are approximately 35 feet tall and are located outside in a 90 mph wind zone. Due to site restrictions, the racks will be spaced approximately 70 feet on center. The racks are...
  10. jmy61

    pre-engineered metal building purlins

    Thanks to all for your responses. The Client is installing the new roof over the existing using the roof hugger system. They have done so on other pre-engineered buildings with which I was not involved. The added dead load is approximately 2 psf. The main frames and foundations can handle...
  11. jmy61

    pre-engineered metal building purlins

    I am structurally evaluating the roof framing of a pre-engineered metal building to verify its ability to support the additional weight of a new roof added on top of the existing roof. I have checked the light gauge steel roof purlins for flexure, shear, and deflection. Can anyone tell me...

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