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  1. Ricyteach

    ASCE 7 wind load for round irrigation tank

    Hi if anyone would be willing to help me with what I think it a simple question I would appreciate it. What I have is a group of 8 irrigation tanks, about 45 ft diameter and 18 ft tall, spaced at about 60 ft (so greater than 1.25 D but less than 2.0 D, so they are partway between isolated and...
  2. Ricyteach

    NDS Supplement design values: nominal or actual dimensions?

    This is probably a dumb question but I don't often need to use the NDS so: today I was looking at the supplement for design values for a 2x6. All the tables reference 2" to 4" thickness, etc etc. I do not see anywhere in the NDS or the NDS supplement where it states that these dimensions are...
  3. Ricyteach

    Select an Area Inside or Bounded by a Closed Frame

    I want to quickly select area or shell elements that are inside the enclosed area of a frame. To explain better: see image below. There's a frame (blue), a metal headwall (orange/yellow), and a skewed (corrugated) pipe arch (red). I want to "cut" a hole for the pipe opening in the mesh of the...
  4. Ricyteach

    Could there be a beam continuously underlying/supporting a "bearing wall" in timber construction

    SUMMARY: What I am imagining is- instead of a bearing wall just sitting on joists which then sit on another bearing wall below- perhaps there a style of construction where a wall sits on top of joists, and those joists then sit on top of a beam that supports the weight of that wall plus the...
  5. Ricyteach

    How to turn on display of points/nodes in SAP2000

    Pretty simply question, but I have looked everywhere can can't find the answer: In SAP, how do I turn on/view the blue nodes in my view window? I know it's possible because they have been turned on in another file (accidentally) but I have no idea how I did it. I did not draw these nodes, they...
  6. Ricyteach

    Reduce the unbraced length for checking LTB of W column using warping resistance?

    I am running into a problem checking the LTB on a W column. The column supports a carport with "hurricane wind" in Houston; it is being rotated in one direction by a "tilt beam" at the top. I have attached an illustration. Basically the W column the designer wants to use seems to be failing in...
  7. Ricyteach

    Industry standard factor of safety for ballast design

    What design standards exist for the design of ballast against uplift forces, and what factor of safety against uplift do these design standards promulgate? I am familiar with a typical FS of roughly 1.5 against sliding forces due to active soil pressure for the design of many types of structures...
  8. Ricyteach

    Load carrying capacity of a flat roof for solar panel array

    We have a client for whom we provide stamping of drawings for ballasted solar panel mounting systems. Checking the structural capacity of the actual flat rooftop is by others, usually (strictly speaking, we're not a structural firm, though as a geotech oriented outfit we do a lot of structural...

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