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  1. MoreAC

    Welding:

    For a deck plate of 18mm thick, I would like to add a bracket type structure on the deck plate. I wish to provide fillet weld of 25mm between bracket and deck plate which is carrying shear load. Is it possible? Thanks,
  2. MoreAC

    Wire rope slings design (ISO 19901-6)

    As per IMCA, we should check the sling at eye location. Applicable distribution of loading 55-45% as the eye is bent and doubled should be used while checking.
  3. MoreAC

    Spool Buckling Length:

    Thank you StephenA and BigInch. I agree with your suggestions. It seems like, the correct way in absence of spreader bar is to consider full length (i.e. distance between extreme slings) as the buckling length. If properly modeled and matches with the actual configurations, we don't need any...
  4. MoreAC

    Spool Buckling Length:

    I am trying to lift a spool. Simple straight pipe spool 10"x 1/2" WT of 45 m length. To avoid excessive bending, I am using 4 slings from the hook located to carry approximately equal loads. My understanding was, the axial buckling length will be defined as the length between individual...
  5. MoreAC

    Light weight truss - spool fabrication

    Yes for racking, I will add a small EA 60x60x6 @ every 2 meters. So, it will be seen in the top view as shown in the attached file. But again, won't the diagonal bracing as shown in the section next to plan help for racking effect? Currently I am planning to develop a plated detail for...
  6. MoreAC

    Light weight truss - spool fabrication

    I have to design/build, lift and install offshore, a trussed arrangement. The requirement is to have a box of 1.2 m wide and any suitable depth. So, I have come up with two trussess spaced at 1.2 m and depth of 400mm (something like steel joists). To minimize weight and as per requirement, the...
  7. MoreAC

    Skew Load Lift Analysis:

    Thanks USSURI. The reply was really useful and it helped a lot. Well, in my present case, I am going ahead with the static analysis (including all load factors ie. weight, cog contingency, consequence and daf)using one hook. In which, i have deflections of 12 cm and stress ratios less than...
  8. MoreAC

    Skew Load Lift Analysis:

    One more question. I do the static lift analysis with Weight and COG contingencies including consequence and DAF's and check that my structure is okey if lifted horizontally 'NO TILT" and I am happy with 10 cm relative displacement. Now, While doing Skew load analysis do we need to add Weight...
  9. MoreAC

    Skew Load Lift Analysis:

    Thanks A lot USSURI. The structure is a overboard platform (kinda steel deck) 24m x 13m in plan and height is 1.0m. The deck is fitted with grating and no deck plating. THe cross bracing is not so strong. I did the lift analysis using one point hook and the deflections are (relative) 10cm. And...
  10. MoreAC

    Skew Load Lift Analysis:

    I am doing a lift analysis using SACS software. I have modelled the diagonally opposite slings attached to two coincident nodes. One of these nodes is fixed in three degrees of translation, the second is free to translate in the vertical direction. A load equal to 25% of the total weight is...

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