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  1. marcleblanc12

    NCEES FE Mechanical Exam Preparation

    I'm a Canadian Professional Engineer who will be challenging the NCEES FE Mechanical Exam in the near future. I'm looking into buying a book to prepare myself for this exam since I graduated from University way back in 2005 so it's been a while since I've looked at a lot of this material...
  2. marcleblanc12

    Kroon's Method for Bottom Annular Plates on API 650 Tanks

    I've been using the attached spreadsheet to perform an elastic analysis on annular rings. I can manage to get a thickness that works so that: θs = θc and θb = 0 with a reasonable stress, however I find the majority of the time I can't get the inside projection to work out to match code...
  3. marcleblanc12

    Torsional Resistance (Blodgett)

    I just recently bought "Design of Weldments" and "Design of Welded Structures" by Omer Blodgett and I noticed in his chapters on Torsional Loading he talks about using "Torsional Resistance" rather than polar moment of inertia to calculate torsional stress and deflection. (Chapter 3.6 in...
  4. marcleblanc12

    Agitator Bridge Supports API 650 Open Top Tank

    In the case of having an open top API 650 tank with an agitator bridge. After calculating what the reaction loads will be where the beams sit at the top of the tank, we have to determine what is required to support those beams. (Either nothing or we need to add a vertical shell stiffener under...
  5. marcleblanc12

    Semi Trailer Reaction Loads

    Has anyone ever tried to solve for reaction loads on a semi trailer that has tandem axles? I've been treating it as a statically indeterminate beam to get my 3 reactions (at the kingpin and each of the axles). I've been solving this using Clapeyron's theorem (3 moment equation) and I keep...
  6. marcleblanc12

    Kroon's Method

    I'm designing a tank with the following parameters: D = 17.2 m H = 18 m Hliquid = 17.38 m SG = 1.48 CA = 2mm According to API 650 Clause 5.5.3, an elastic analysis must be made to calculate the required thickness of the annular ring. I'm using Kroon's Method to calculate the thickness, and...
  7. marcleblanc12

    Structural Steel Design Handbooks

    Anyone know of a good structural steel design handbook that's based on rules in AISC ASD and AISC 360?
  8. marcleblanc12

    AISC Design Guide 25

    Anybody know how useful AISC Design Guide 25 is? It's for Frame Design using Web-Tapered Members. I'm just wondering if it's a worthwhile book to get to design frames using web-tapered members.
  9. marcleblanc12

    Piping Design Handbooks

    Does anyone know of a good design handbook to design piping systems as per ASME B31.3 and/or B31.1?
  10. marcleblanc12

    Telltale Hole Location API 650 Tank

    Does anyone know of a minimum distance for a telltale hole to the edge of a repad for API 650 tanks? All I can see in the code is along the horizontal center line. There has to be a minimum edge distance though. There's no way you can't put them right on the edge of the repad.
  11. marcleblanc12

    API 650 shell seams using a backing bar?

    Quick question: Are you allowed to use a steel backing bar to weld horizontal seams in an API 650 tank shell? This would be without taking the backing bar off, just leaving it in. I can't find anywhere in API 650 where it says you can't do this, but it just doesn't seem right to me. Here's...
  12. marcleblanc12

    Baffle Design in an API 650 tank

    I need to design a baffle in an API 650 tank. The tank is 47' Dia X 24' High. There is a baffle inside the tank which is 20' high by 38' long welded to the bottom plates and on one side against the inside of the tank shell. The baffle will never hold all the liquid on one side, but will instead...
  13. marcleblanc12

    Geodesic Dome Roof Literature

    I'm looking to buy myself a book on geodesic dome roof design. I specifically want to look into this in case anyone asks me to design an aluminum geodesic dome roof for a large diameter API 650 tank. I'm not just looking for a book that will show me how to calculate the proper geometry, but I...
  14. marcleblanc12

    How do I calculate if temp shell bracing is required during erection of an API 650 storage tank?

    I design many API 650 storage tanks. I have some customers who insist on my crews bracing the tank shell during erection prior to us having the top stiffener and roof in place. Does anyone know how to calculate whether a tank shell will fold in on itself in the wind before the top stiffener is...

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