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  • Users: johg
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  1. johg

    Trailer roll over

    Hi, On a trailer a product with a high C of G is being tranported. The product still getting larger and the C of G is also getting higher. Is there an easy way of calculating the stability against rolling over. Driving at low speed (walking speed) Turning corner radius is small and heigh...
  2. johg

    Hybrid bolted connection pre-loaded and injection bolts

    Thank you all for the input. Same conclusion as I had. For anyone who has any interest see also publication from Issuu (issuu.com/facom/docs/ti-01-injectbolts-eng) Grtz J
  3. johg

    Hybrid bolted connection pre-loaded and injection bolts

    We are preparing calculations for an existing beam to beam connection. The bolted connection does not meet the fatigue requirements. Therefore we are calculating a friction connection with pre-loaded bolts. Calculations are done according Euro code. The Sls state we can meet the requirements...
  4. johg

    Bevel angle tolerances

    Hi faizal8009, The tolerances on bevel angles are mentioned in standard only by exception. The API has some tolerances on bevel angles. If you weld the bevels yourselves, you will have some own tolerances (+/- 1°). If bevels are end preparation normally you should ask your client or make a...
  5. johg

    Support saddle

    Dear all, Thanks already for the input. The number of pipes we have to store is about 30 to 40. The dimension left OD 5200 mm, wall thickn. 60 mm, right side OD 6000 mm, wall thickn. 70 mm. In the middle there is a conical section, which we do not want to support. We need store the pipe about...
  6. johg

    off topic question about why i am forced to change my way of engineering

    Hi, Company policies are made to get structure in the organisation. But details as how a person works, is up to your boss. I think the way you work, works for you and the result is the same. The software programms you work with are only tools. It is all about the result. If your work you...
  7. johg

    Support saddle

    We need to fabricate a great number of saddles. The saddles are only support saddles for temporary storage, one or two months to store big pipes (approx 6000 mm, wallthickness 60-80 mm). Should I follow the ASME code or is there another procedure I can follow, so we can construct lighter...
  8. johg

    Hoisting speed slow and fast

    Hi you all, I am evaluating the effect of hoisting heavy products starting at low speed and starting at fast speed with overhead cranes. The proper way is to start slow hoisting the product and go to fast. As we know our crane drivers anything needs to go fast and faster. The discussion is...
  9. johg

    2D Beam Analysis Software Recommendations

    You might look at MASTAN2. We were looking for a replacement programme to. http://www.mastan2.com/download.html it works for us. Johg
  10. johg

    Calculating stress and force when forcing a tubular round

    Thanks all for your input. The out of roundness was due to welding longitudinal weld and some stiffeners at the other end of the tubular. We needed to fit up some other tubular and weld the circumferential weld. We calculated the needed pressure and beam to push out the out of roundness. The...
  11. johg

    Calculating stress and force when forcing a tubular round

    Sorry made a typo, length tubular is 10 mtr long instead off 10".
  12. johg

    Calculating stress and force when forcing a tubular round

    The tubulars has been made from several smaller tubulars (length 10") welding circumferential weld after welding the longitudinal welds. All welds are full penetration welds. The out of circularity is due to welded internals. We only need to adjust the outer end of the tubular, so we can weld...
  13. johg

    Calculating stress and force when forcing a tubular round

    We are fabricating some heavy wall tubulars. Diameter up to 5 mtr and wall thickness up to 110 mm. Material grade S460. Due to some welding the tubulars are out of circularity. We cannot calibrate the tubular by rolling. We need to make use of a hydraulic pump to push the tubular round and weld...
  14. johg

    Steel construction problem, overhead crane rail

    Your are correct with problem 2, we suggested the same. The structural engineer is checking the calculations. We thougt that only the bolt in the support are sufficient. I have some doubts, why the bolts have been broken. We are substituting the bolts which have been broken including the once in...
  15. johg

    Weld tests on Lifting/Spreader Beams.

    We fabricate our own lifting beams up to 200 tonnes. We fabricate to the European rules. Guidelines to EC. We have a lot of experience welding for offshore structures. Only qualified welders are selected for welding on lifting equipment. Partial welds and fillet welds are only checked visual...
  16. johg

    Steel construction problem, overhead crane rail

    Thank you all for your input. Does anyone have a collegea or associate in Europa whom I could invite to discuss the details. Prefarable The Netherlands, Germany or Belgium. Your answers tell me that we where on the wright track. We just need to find the wright man(specialist) for the job. Many...
  17. johg

    Steel construction problem, overhead crane rail

    We have specified two problems 1. Broken bolt M30(fatique) connection of crane rail beam. We think the bolt takes forces due not calculated for. It is only calculated for shear. Due to crane movement it will have shear stress and tension stress. 2. Broken bolt M20(stress) connection support to...
  18. johg

    Steel construction problem, overhead crane rail

    I will upload some pictures and sketches tomorrow, Due to time difference 23:00hr local. Thanks for the information so far.
  19. johg

    Steel construction problem, overhead crane rail

    We have found some loose bolts in the connections and some broken bolts. The 4 overhead cranes can move each 200 tons. We are afraid there is a principal fault in the detail construction. As we checked the calculations we did not find any clues.
  20. johg

    Lashing and securing cargo on marine vesssel

    Does any one have any documentation or calculation references for lashing and securing cargo on a MV / Coaster

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