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  1. R

    Concrete Wedge Anchor Bolt Installation Tolerances?

    Does anyone have a source where I can check installation tolerance criteria for concrete wedge anchor bolts? I have seen tolerance info from ACI and others but apply to embedded or cast in place structural components. I cannot find a source or suggestion for post-installed wedge anchors...
  2. R

    Inlet Filter Pressure Losses

    yep these are the original ones. Ah.. I see the External SP values I didn't know what that was relating to... so yes, looks like it's all good. Thanks!
  3. R

    Inlet Filter Pressure Losses

    This was very useful. I understand the general principle, basically, for my fan there would be a new system curve that includes the filters. The screenshot is the real curve for my fan and the purple line is what a new line might look like. I am concerned that it is under-designed. Is there a...
  4. R

    Inlet Filter Pressure Losses

    Structural engineer here, trying to figure out if the equipment in a small warehouse is appropriate. I own it and want to avoid retrofitting the ventilation. Looking through the data sheets they gave me, and running some basic numbers, the areas and air volume (CFM) through the inlets and...
  5. R

    Stresses in a very wide T shape

    I'll think about that. This is a curtain wall application. Usually anything that yields would not pass muster because any small permanent deformations can compromise the water management. The load is a wind load reaction so it needs to receive that point load acting alternately in both...
  6. R

    Stresses in a very wide T shape

    Performed a quick FEA and yes, same results. Using the usual approach with the moment at center of beam gives me a much higher stress at the plate.
  7. R

    Stresses in a very wide T shape

    Thanks for that, I realized I over-simplified the analysis a bit (one of the edges of the bottom plate is continuously braced, the other end is free). I add an improved sketch. Deflection is not a concern. The design objective is to avoid local yielding at the point where the leg meets the...
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    Stresses in a very wide T shape

    Hi, I am working on a problem where I have a roughly "T" shape profile (inverted) where I am applying two equal point loads to the top of the single leg. I am trying to evaluate stresses on the flat plate caused by the cantilever leg. I usually simplify this problem and simply assume a flat...
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    LTB for Unitized Assembly (includes schematic)

    Found an article that I think pretty conclusively shows some of this ("Full scale tests of aluminum mullion couples in unitized façades under wind actions"). Under positive wind loading, the glass ends up being very effective as a lateral brace for the compression flange, and even better if the...
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    LTB for Unitized Assembly (includes schematic)

    1. -Thanks for the input, I'll check 2010 and 2015 ADM. They changed the computation for LTB in ADM 2020 I'll look back for references and any aids that can be used to get a more realistic value. 2.- I have seen that article but indeed it refers to open shapes, not male/female assemblies with...
  11. R

    LTB for Unitized Assembly (includes schematic)

    Hello! Context: We have a question regarding assumptions for a unitized curtain wall, where the main structural component is a male/female aluminum beam assembly. Typical spans anywhere from 10ft to 15ft. -The usual assumption by contractors (which we think is incorrect) is to assume that each...

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