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  1. TrustButVerify

    How will you assess a bridge for oversized load transportation?

    I have been quite curious about how structural engineers assess bridges when a heavy transport convoy (trailer + cargo) is being driven on top of them. I have seen different approaches, point loads or distributed loads (with some different criteria as well). I'm summarizing them in the picture...
  2. TrustButVerify

    ????? Degrees/Percentage of a road (traffic signals)

    I was just doing some road surveys nowadays in Ireland, and I found these signals (200m away from each other, one was doing downhill, the other one going uphill, so, not the same slope). It's curious one traffic signal is in degrees, and the other one in percentage. I tried to measure the...
  3. TrustButVerify

    Doubt about GENERATOR technical drawing

    Any clue what does it means the letter inside the red circle?https://files.engineering.com/getfile.aspx?folder=936ec1ba-1d80-4ebb-b606-6a76670c2538&file=technical_drawing_generator_2.png
  4. TrustButVerify

    Saddles for transportation missing. Why?

    Hello folks, Recently, I just posted here some words about the lack of understanding between vendors designing pressure vessels, and companies doing the transportation for installation on site. Here is a picture quite curious I would like to share. Why the vendor cannot design the vessel for...
  5. TrustButVerify

    What is your take regarding transport/lifting affairs of a pressure vessel in the design phase?

    I studied mechanical engineering, and my internship consisted in the thermal/mechanical design of a pressure vessel (TEMA/ASME). Curious thing is, that when doing so, I noticed the calculation of lifting lugs/trunnions/saddles were more or less, the last topic in the design of the vessel, and...
  6. TrustButVerify

    Two wheel drive vs 4 wheel drive (Torque, traction?)

    Hello folks, So, just imagen you have two commercial trucks, one with 2-wheel-drive and another with 4-wheel-drive, and their WEIGTH is the same. Great, they are being manufactured to be able to be driven on a flat surface, both of them.. Like driving on the road. Now, this is the...
  7. TrustButVerify

    Importance of thickness of steel plates when load spreading

    Hello, I'm looking for a video explaining how the thickness of a spreader (.i.e steel plates) is important when load spreading load over soil or a surface. There is a misconception among many people that only the width and the length of this spreading element is important, and the thickness...
  8. TrustButVerify

    DRAWING CIRCLE IN NON-ISOMETRIC VIEW

    Hello, Nowadays I'm scratching my head how to draw a circle in a NON-ISOMETRIC view in AutoCAD. I've watched several videos on youtube, but all of them speaks about ISOMETRIC view, and that's not what I'm looking for. For illustration, I just attached a picture for better understanding: 1) I...
  9. TrustButVerify

    Minimum curve radius along the road

    Hello, I'm trying to set up a spreadsheet to calculate the cargo securing or lashing needed to secure a load to trailers in order to make the transportation safe for a lot amount of kilometers. A force I need to calculation is the centripetal force acting on the convoy while doing a curve, and...
  10. TrustButVerify

    Generic radius of curve for cargo securing calculations

    Hello, I'm trying to set up a spreadsheet to calculate the cargo securing or lashing needed to secure a load to trailers in order to make the transportation safe for a lot amount of kilometers. A force I need to calculation is the centripetal force acting on the convoy while doing a curve, and...
  11. TrustButVerify

    Soil preparation: Platform to withstand heavy loads

    Hello, In practice, is there so much difference budgeting/quoting to build a platform to withstand 10t/m2, or 100t/m2. I'm asking this since we awarded a subcontractor building a platform to withstand 20t/m2, and when the steel plate test was performed, in quite several points the results...
  12. TrustButVerify

    Soil suitable for crane/lifting operations above 2??0??tonne/m2

    Hello, I'd like to highlight I'm not a civil or soil engineer, but mechanical. I specialized in crane/transport operations. More or less, we always communicate the ground bearing pressure we need to achieve execution, and civil engineers take care of the rest. I would like to find out more...
  13. TrustButVerify

    Load spreading - Crane mats and sand bed

    What will be the best position to consider for a bed of sand in order to spread the load of cargo store over stacked crane mats?
  14. TrustButVerify

    ?? ???? Rigging stability of 4 lifting points close to each other (below CoG).

    I'm scratching my head nowadays trying to understand how to approach the lifting of a cargo load by a gantry hydraulic crane. Cargo has 4 lifting points, and they are quite close to each other (relative to cargo length and width) around the geometric center of the cargo. Four lifting points...

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