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  1. mrMikee

    Single Angle Compression

    After further reading (page 4-7) I realize Table 4-12 is the application of the Sakla procedure for single angle compression members when section 5E cannot be met, as WillisV said. Thanks again WillisV. Therefore if my previous calculation is correct there will be a 60% increase in capacity...
  2. mrMikee

    Single Angle Compression

    I'm still having trouble with this. I've been trying to calculate column loads for angles per the part 4 tables. For example Table 4-12 for a L3x3x1/4 angle with KL=4' shows an allowable strength of 9.55 kips. By my calcs: L/rx = 48/.842 = 57 per equation E5-1: (for a planar truss) L/r = 72...
  3. mrMikee

    Single Angle Compression

    WillisV, Thanks for the reference, I've printed it out and am reading over it now.
  4. mrMikee

    Single Angle Compression

    engstructural: That sounds like what I've been doing up to now, calculating compression stress based on principle axis rz, then translating Mx into Mz and Mw moments, all for use in the combined stress equation. This produced a significant drop in capacity over concentric loaded angles...
  5. mrMikee

    Single Angle Compression

    I haven't used the AISC 13th Edition at all yet for design, I'm still using ASD 9. Today I've tried to understand Section E5 concerning Single Angle Compression Members. Their logic for x-axis buckling makes a lot of sense, but it seems the new design procedure is based on equations E5-1...
  6. mrMikee

    Truss Conveyor Design

    Thanks for the comments. I'm going to modify my design calcs to use the eccentricity between the top chord angle cg and the surface where the two angles are welded together. Since in my opinion this will overestimate the bending moments in the top and bottom chords I'll have to come up with a...
  7. mrMikee

    Truss Conveyor Design

    For the diagonal bracing I solve as if they were concentrically loaded members. Since the CGs don't line up the members obviously aren't concentrically loaded so I use the technique in the AISC on page 3-55 for Single Angle Strut design and calculate the z and w axis bending stresses. As I...
  8. mrMikee

    Calculation software (again)

    Visual Basic isn't really obsolete but the newest version VB.net doesn't support the GOSUB statement which wrecks almost every VB program I've ever written. Last year I downloaded Visual Basic Express from Microsoft and it was free. It's actually pretty cool, but I still use VB6. I use...
  9. mrMikee

    Truss Conveyor Design

    I'm reviewing the design of several truss conveyors constructed from angles. These have been modeled and solved using Multiframe. There are no gusset plates in these trusses, the angles are welded together by overlapping the legs and welding, creating an eccentrically loaded connection...
  10. mrMikee

    UBC/IBC Question

    I failed to mention that you still need to design per the applicable code. -Mike
  11. mrMikee

    UBC/IBC Question

    Try looking at the following... thread507-126960 They aren't really compatible methods but a while back I tried to work out an equivalent. Note that most comments in the thread did not support what I was trying to do. What I wanted was to develop a rule-of-thumb as a general guideline. It...
  12. mrMikee

    engineering release process

    I'd suggest looking at... "Engineering Documentation Control Handbook, Configuration Management in Industry." Frank B. Watts Regards, -Mike
  13. mrMikee

    50 ksi W-shapes

    This should work better. http:/www.ryerson.com/stocklist/StocklistServlet?COM=GetTable&ID=916 -Mike
  14. mrMikee

    50 ksi W-shapes

    Here's a link to the Ryerson warehouse stocklist which indicates to me that there still could be a lot of A36 being shipped. Any opinions? Regards, -Mike
  15. mrMikee

    Eigenvalue Buckling Analysis Trivia Question

    Back in the 80s I wrote a FORTRAN program to do a dynamic analysis of a mechanical system using modal analysis. I borrowed a lot from programs that the professors had available, but it was still a huge amount of work. Now I use Mathematica with all the matrix math and eigenvalues capabilities...
  16. mrMikee

    Eigenvalue Buckling Analysis Trivia Question

    haynewp, Your mention of MASTAN which I'm not familiar with made me think of MYSTRAN authored by Dr. Bill Case a member of the team that developed NASTRAN. The home page has an illustration of a truss eigenvalue problem. http://www.mystran.com/index.htm Regards, -Mike
  17. mrMikee

    Document Control

    securitech, There are two books that I think are very good but are directed more towards bills of materials and product structure than CM. "Manufacturing Data Structures" by Clement, Coldrick, and Sari "Bills of Materials" by Dave Garwood If it was up to me I would do something that would...
  18. mrMikee

    Document Control

    This is a good book that might be worth taking a look at. "Engineering Documentation Control Handbook, Configuration Management in Industry." Frank B. Watts Regards, -Mike
  19. mrMikee

    2007 CBC, 2006 IBC: when will these be adopted officially in Cali?

    According to the ICC adoptions site the IBC2006 will become effective in California January 2008. http://www.iccsafe.org/government/adoption.html Regards, -Mike
  20. mrMikee

    load factors on lifting

    nsjxs, It's been a long time since I read thru the AISC material on lifting beams so I can't really remember the reasoning behind their recommendations. My first job after my engineering degree was in a plant engineering department where one of my responsibilities was lifting devices. I...

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