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  • Users: MarioGr
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  1. MarioGr

    Aluminium RHS rule of thumb?

    Are there any approximate rules of thumb that engineers here use for aluminium RHS members vs steel RHS members with regards to bending capacity? IE a 150 x 100 x 5.0 RHS member has a bending capacity (phi)Msx of 44.00 kNm. Therefore a 150 x 100 x 5.0 aluminium member's capacity would be...
  2. MarioGr

    Collapse pressure of steel casing

    Probably have been done to death here but after reading numerous threads and googling the hell out of it and consulting Roarks I am none the wiser so here I am. I have a drilling client working out woop woop in Australia. (It's near 'Out to Buggery'.) They will dig a hole some 2.0m x 2.0m and...
  3. MarioGr

    Stacked pipes. Load to upright supports.

    I have a situation where some pipes need to be stacked 7 rows high by 6 pipes across. Each pipe weighs approx 50kg. They're stacked on top of each other. Now if this container held soil or water the loads to the uprights would be easy to calculate but in this case I'm unsure how to proceed...
  4. MarioGr

    Another catenary problem.

    Gents. (and Ladies). I've been tasked with designing the support structure for a flying fox (AKA a zip line) that spans some 210m. The ground is gently sloping so that there is a difference in height between start and finish of 7.2m. Due to a zorb ball (3.5m inflatable ball you climb into)...
  5. MarioGr

    Natural frequency of a small platform - hand calculations

    Hello, I've been a long time lurker of this site and have found it invaluable regards many topics. I am a structural engineer who has strayed into the area of mechanical engineering inadvertently. I was commissioned to certify the structure which I duly did only then to have been told...

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