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  1. rather_be_riding

    BS/ISO 20332 2018 revision to equation 67

    Hi all, I'm working to Australian Standard AS 5224 which is based upon ISO 20332. I'd like to check the originating standard's version of equation 67 but don't have access to a copy of the 2018 version which has a modification to that equation. Further to that, if anyone can point me in the...
  2. rather_be_riding

    LTBeamN 'sections are not compatible'

    Agent666 - yes I'm aware and had already done so but it doesn't seem to offer much explanation for this issue either. Of course that could possibly be not helped by the translation but I've struggled to see anything that looks applicable really.
  3. rather_be_riding

    LTBeamN 'sections are not compatible'

    LTBeamN per the title and first line of the post.
  4. rather_be_riding

    LTBeamN 'sections are not compatible'

    I'm trying to do an LTBeamN buckling check of a stacked column arrangement and I've got this error. Does anyone know what it means - I can't make head nor tail of the French manual to try and sort it out. Sections are property specified: h: 280 A: 5726.2 Iy: 3.78E+7 Iz: 3.78E+7 It: 3.784E+7...
  5. rather_be_riding

    Cost of Closing an Engineering Firm

    It's wise to consider this - it's a significant hidden cost to going back into the workforce should you fail or just get sick of lying awake at night second guessing yourself. I checked a couple of years back and I could get a buyout of my policy. It was several times more expensive than a year...
  6. rather_be_riding

    Rigid Square Section Supported by C-Channel

    @BAretired - I was asking the OP rather than you, sorry. Could have been clearer. How the OP has the end arrangement constrained in turn has some bearing on the stress experienced within it. I think the stress in the plate is a tad more complex than evenly distributed across the length and/or...
  7. rather_be_riding

    Sheetmetal Terminology

    @JohnRBaker - this may be an Australia vs US variation...or simply that the industries I've dealt with have preferences for terminology which don't align with those you have experience in. That said, WRT the video you included, as the features are formed rather than added, I too would...
  8. rather_be_riding

    Rigid Square Section Supported by C-Channel

    How are the C-channels constrained in turn? At the base or at the cross-sectional end? I'm guessing the base but you know what they say about assumptions....
  9. rather_be_riding

    Shear Centre of B2B Steel Angles with Gap

    I would expect the shear centre to be located midway between the two angles horizontally and roughly midway through the thickness of the horizontal leg. I suspect you should be able to calculate the shear centre for a single angle in the same orientation and use the vertical location for your...
  10. rather_be_riding

    Sheetmetal Terminology

    I rarely hear/see rib used with reference to sheet metal; typically in cases where a rib might be called for to stiffen a panel, the component is designated as a stiffener and may be differentiated as traverse or longitudinal.
  11. rather_be_riding

    AS 4100 5.14.5

    Thanks steveh49 - I take your point.
  12. rather_be_riding

    AS 4100 5.14.5

    Retrograde, Agreed re: 5.14.2 and 5.14.3 - however, it also means in reverse that the chunkier your stiffener is, the larger Is needs to be.
  13. rather_be_riding

    AS 4100 5.14.5

    Does anyone know if the d term of the equation given in 5.14.5 to refers to the beam depth or the critical flange width? Furthermore, it seems counter-intuitive to me that as you increase the slenderness ratio of the stiffener, alpha-t approaches zero and therefore the requirement for the Is...
  14. rather_be_riding

    Overhead Crane wheel standards/allowances

    Australian Standard AS 1418.1 - 2002 Clause 7.20.3.6 (now superseded and I haven't tracked down if there's a new minimum worn thickness specification in the new standard) has a section that specifically details the minimum worn flange thickness. It is a specification which should be defined in...
  15. rather_be_riding

    Residual fatigue life assessment of structure with unknown loading history

    @rb1957 - Originally the question matched a specific piece of equipment I received an enquiry about but after I managed to speak to someone who actually knew what was going on, it didn't fit the profile. As you can see it's pretty much either a case of it's too hard/expensive or figure out your...
  16. rather_be_riding

    Residual fatigue life assessment of structure with unknown loading history

    @rb1957 - jinx on that. It's either rely on it or go nuclear on cost. Sorry about the slow reply - it's rather early here ;)
  17. rather_be_riding

    Residual fatigue life assessment of structure with unknown loading history

    @All - having had an opportunity to discuss the issue with the end client, it turns out 3 of the 4 engineers involved had a VERY different idea to the one who approached my client with the project in the first place so this is all academic. However, I threw this out there for the purpose of the...
  18. rather_be_riding

    Residual fatigue life assessment of structure with unknown loading history

    @LittleInch, desertfox, dvd - fair and reasonable I reckon. That's probably where it will end up. I actually suspect that if I give them an estimate on addressing it the 'right' way, they'll chase around getting three quotes (which is reasonable) and one of those three will be a service provider...
  19. rather_be_riding

    FREE BODY DIAGRAM

    @elinah - I wasn't suggesting they wouldn't hold the joint tight; I more meant a fail safe in the event someone fails to tension them properly. We're in agreement. Glad your check matched up in the end.
  20. rather_be_riding

    Residual fatigue life assessment of structure with unknown loading history

    @3DDave - nothing so dramatic. Inspection is difficult/time consuming/expensive during service. Catastrophic failure of such things in my experience is usually due to poor maintenance. The rub is that poor maintenance is more the norm than the exception. At a guess, it might take a day and a...

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