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  • Users: MDDSI
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  1. MDDSI

    Scalloped Stiffening Rib

    Picture attached. I am posting here because I am at wits end on how to handle this situation. My company often deals with large flat surfaces that are subject to typically low pressures (approximately 1 psi). In the past, a stiffening rib has been added to the surface to help rigidity - usually...
  2. MDDSI

    Maximum Height of Rectangular Beam?

    I am curious is there is a real limit to the height to thickness ratio of a rectangular cross section on a beam? We are considering a vessel with a wall consisting of a large, rectangular flat plate. The whole vessel will need to withstand pressures from fans, which results in around 1 psi of...
  3. MDDSI

    Fixed End Condition Inside Cylindrical Shell

    I am having some debate with coworkers on the requirements of a fixed end condition on a beam. In theory, a fixed end should allow for a "weaker" beam for any given load as opposed to a simply supported beam. In particular, I am concerned with how the moment at the ends of a fixed beam may...
  4. MDDSI

    Large Steel Vessel Design

    I am a chemical engineer working on a rather mechanical/structural engineering oriented project - sizing explosion venting for a future spray dryer. NFPA does a good job of explaining how to come about the needed venting area, but the thing I am hung up on is how to calculate the design pressure...

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