Thanks for the reply SAIL3.
Agree that the extent of force transfer to the foundation is a grey area. In a new design, it is more often OK to err on the conservative side. But for verification of an existing foundation for new loads, it is a bit like clutching a straw.
In this instance the...
JStephen,
Thanks for your response. The forces given for design were based on the pipe stress analysis which included the vessel modelled as stiff element with spring stiffness to account for foundation resting on soil. The forces were given at the nozzle face. This being the case, the forces...
Dear Community Members,
I am verifying an existing vessel(horizontal) foundation for new vessel loads supplied by the vendor. The vessel has 24" diameter inlet/outlet nozzles with forces/moments along three principal axes.
Ironically, the existing foundation design does not consider the nozzle...
dhengr, desertfox,
Thanks for your replies. My first thought was to recommend Stainless steel padeyes as the frames were made of the same material. A proposal was put forward by the Contractor to weld Client supplied standardised padeyes with CS material.
Bolted connections are not allowed as...
Dear Community Members,
Can a carbon steel padeye (Fy = 250 MPa/345 MPa) be welded to a Stainless Steel Frame (SS316) to facilitate lift operation? Are there any restrictions that will render the payeye not fit for reuse should the frame need to be replaced at the end of service life?
Thanks...
Dear Mining Community Members,
Can you please direct me to a reference that provides a list of structural components that typically form part of a Mine Plant (Gold/Copper/Iron ore)? Any reference that elaborates on each component from design perspective is valuable.
Best Regards,
Thanks Gents. Please bear with me for a delayed reply.
The winch is used on an offshore vessel on a couple of times (Not for frequent use).There is no stall load published for the winch. I will work through some of the references you have mentioned in your replies.
Best Regards,
I am designing a skidway track to pull an equipment using an Air winch of 25 Te SWL. Can the community members suggest/recommend a reference that provides guidelines for the design of Winch support? The winch is supported on one end of the skidway track. Approximate length of travel is 75 m and...
Dear Forum Members,
I need clarity on the recommendations of Eurocode EN 1991-3 (2006) regarding wind loads on cranes outside and inside buildings.
Point 6 of Annex A recommends a wind speed of 20 m/s for crane operation compatibility. I assume that the crane operation will shut down when the...
Hi FixedEarth,
Thanks for your response and please bear with me for a delayed response. Ended up with a resonably sized pile to conrol lateral deflection at the pile head. With the soil being slushy in the top few meters, passive resistance did not help much.
Best Regards,
StructuralNomad
Hi Riggly,
Thanks for your response.
The structure that I am designing is supported on piles in a ground that is very soft in the top five meters, turns harder and terminates in strong granite down 25 m below ground level. The intent is to limit the lateral deflection at pilehead to a nominal...
Hi,
Are there any reference materials on design of pile foundations that specify permissible lateral deflections for steel piles at the pilehead? I vaguely remember about an article specifying permissible lateral deflection as function of pile diameter (Can't recall the Authors name).
Best...
Thank you all.
Tmoose, bolts are 20mm in Diameter and the bolt hole are clearance holes.
Will cover the above mentioned precautions on my response to Fabricator's query.
Regards,
Are there are any guidelines on drilling bolt holes in restored base metal? In one of the modification project, the bolt holes are drilled in wrong location resulting in partial(in some cases complete) misalignment. The fabricator is suggesting to seal the bolt holes with plug weld and redrill...
