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  1. austim

    Effect of manufacturer supplied sunroff on crashworthiness?

    HI, Greg and Brian. Thankyou both for responding. I much prefer Brian's response, since it gives me some reasonable moral support for my uninformed beliefs :-D , but I fully sympathise with that "can of worms" reference. As it happens, my daughter has now decided to buy a vehicle with no...
  2. austim

    Effect of manufacturer supplied sunroff on crashworthiness?

    As a retired structural engineer (bridges and other fun stuff :-)) I have been asked to comment on the likely effect of a sunroof on the crash worthiness of a 4WD (Toyota RAV4, if that matters). Likewise, what about the resistance to falling objects? (eg tree branches falling after bushfire...
  3. austim

    excel 2002 - chart problem

    jghrist, Thanks for your speedy response - it worked like a charm. I remain somewhat puzzled, since the selection in my basic preferences is to 'show all'. Somehow that must have been overwritten for the particular spreadsheet.
  4. austim

    excel 2002 - chart problem

    I have just tried to add a bar chart to show some values within a fairly large spreadsheet. The chart shows just what I want, provided that I have mouse-clicked within the chart area. But as soon as I mouse click anywhere else the chart disappears, to be replaced by a plain grey block. What...
  5. austim

    Starting a consulting firm

    I would have thought that '12 years experience between us' is not a good basis for starting up a genuine consultancy. During the period when I used to hire temporary engineering staff (to supplement our own fulltime engineers) I would very rarely hired engineers with less than ten years...
  6. austim

    seawall

    Hi, V2. If you 'connect' the top of the seawall to your building with any structure that restrains the lateral deflection of the seawall at its top, you will radically alter the distribution of bending moments in the wall. Quite possibly you will generate vertical tensions in the shoreward...
  7. austim

    Dynamic Load of airplanes on Bridge

    I would use at leat 100% impact. Under wet conditions, a good pilot will intentionally impact the runway quite severely, so as to avoid potential aqua-planing. I learnt that years ago when my plane landed at Hong Kong in a severe rainstorm. We barely knew when our plane had landed at Darwin...
  8. austim

    Power supply - International comparisons

    Sorry to have troubled you all. I found my answer - http://kropla.com/electric2.htm seems to have all I need.
  9. austim

    Power supply - International comparisons

    I am trying to compare electricity supply conditions (ie AC/DC, Voltage, Hertz) in UK, Australia, Japan, (and possibly other countries). Can anyone point me to a web reference that would help me?
  10. austim

    Analysis of pile groups with battered piles??

    Focht3, You are right in assuming that my experience has rarely ventured more than 2 miles from the coast. And of course there is commonly a major difference between pile groups used for deep water wharfs, dolphins etc and offshore platforms. The latter are frequently (if not invariably ?)...
  11. austim

    Analysis of pile groups with battered piles??

    My comments mostly originate from experience with pile groups for marine structures and bridges, where it is common for the piles to extend a considerable distance above the adjacent soils. I would question the statement that "each battered pile should be associated with a vertical...
  12. austim

    Out of plumb column

    I would encourage you to just go ahead and reanalyze the column as it has been built. If you want to be slightly conservative, add the 1/500 tolerance to the measured inclination in your design model. Surely there can be no regulation that prohibits non-vertical members? eg, you can find...
  13. austim

    Monorail beam size

    albresco, It could be worth your while visiting www.standards.com.au. The Australian Crane Code AS1418 has a small appendix dealing with the design of monorail beams, including assessment of the minimum acceptable flange and web thicknesses. My own copy of the code is fairly ancient, and has...
  14. austim

    What to do about perceived future threats?

    PM, Maybe development would not "cease". All it would need to largely eliminate further plane/building (or for that matter, plane/mountain) interactions would be a reasonably fail-safe system in all airliners that would over-ride the pilot and divert the plane if the system...
  15. austim

    Calculating for eccentric loads on pad (mat) foundations

    see thread507-4647
  16. austim

    Soil Pressure - U.S. to Metric Coversion Question

    Hi, BigH, N/mm2 is actually MPa. And for any dynamic calculations, we still have to consider mass as well as weight, so kg/m3 will have to stay in our vocabulary, like it or not.
  17. austim

    Combined Footing With Axial Load & Moment

    YoungMind, No apology need for learners. I should warn you that, if all goes well, you'll still be learning when you are 70 or over. Yes, the total moment on the base is 4000. Assuming that your two stacks are identical, then each has a resultant lateral load F at a height H, where FH =...
  18. austim

    Spreader Beam Design

    Boo1, The basic problem was explained in detail in a copy of "Steel Construction" (Journal of the Australian Institute of Steel Construction), Vol 23, No 2 May 1989. Paper by Drs. Dux and Kittipornchai, "Stability of I-beams under self weight lifting". In their...
  19. austim

    Spreader Beam Design

    WideMike, One trap for beginners is that the classical buckling solutions for lateral/torsional buckling do not apply to beams suspended from crane slings. The point is that the classical solutions assume zero torsional rotation at the supports. However, for a crane suspended beam, any...
  20. austim

    Moment On Combined Footing

    Hi, YoungMind. It is a pity that you chose to post this in the concrete engineering forum as well as the Foundation engineering forum (which I would consider to be the only logical forum for your post). By such crossposting you are running the risk of this post being deleted (since the other...

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