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Thank you all.

Hi All, Can anyone assist with this. I have a frame (comprising of a tubular section)supported on a concrete block, global bending stress checks are OK but would like to check local buckling/ovalisation stress to make sure that the tubular will not buckle espercially at the edges of the...

Thanks Gents, The manufacturer doesn't seem to have any limits whatsoever, which I find stange and thus wanted to see if any of you have experience on that. I didn't want to bother you with the details of the project. But looks like I now have to. An existing compressor (with it own driver...

Many thanks Gents, Is there a specific requirement for allowable deflection of a beam supporting say a CAT engine? This is a rotary (vibratory) equipment and where coupled with a compressor requires limited deflection. This os more of structural + mechanical requirement.

Hi All, Is there any specific code that stipulates the allowable deflection of beams? I notice that different values are used by different engineers. There should be different requirements for: variable (live) loads only variable (live) load + permanent load vibratory loads support condition...

Thanks SlideRuleEra, Given the fact that the neoprene will not compress excessively, I have allowed 10mm gap between the flanges of the clamp with the assumption that full grip between the tubular and the neoprene would have been achieved before the 10mm gap closes. I have derived how much...

https://res.cloudinary.com/engineering-com/image/upload/v1560241775/tips/Estimation_of_Neoprene_Compression_ifhe35.pdf Thanks rb1957 The neoprene is being compressed around a tubular with a circular clamp - see calcs in link above

Thanks 3DDave, Your post contradicts SlideRuleEra's. Would you recommend that I assume that neoprene is infinitly stiff in compression? In design of a clamp, a small gap need to be allowed between the flanges of the clamp to ensure that the clamping force is effect to cause enough grip. Where...

https://res.cloudinary.com/engineering-com/image/upload/v1560241775/tips/Estimation_of_Neoprene_Compression_ifhe35.pdf

Thanks SlideRuleEra I derived the stiffness and computed the force required to cause 5mm compression of the neoprene. What I'm not sure about is the bearing bearing area, see attached my calc. Also, would you expect the 5mm depression to occur all round the tubular? Is it then right to divide...

Hi All Many thanks for the different view on the VM. I presume the VM checks is for localised stress checks, say padeyes, where there's combimation of tension+bending+shear. Obviously the AISC factors are for complete beam sections I'll resort to using allowable stress to 1.0Fy as there's no...

Hi ALL, Could any of you please throw some light on this? I'm trying to estimate clamping force. Initially, I need to know how much force is required to compress the neoprene between my clamp and tubular section. I have properties of the neoprene however do not know how to compute the...

Thanks Dave, I agree the 9th Edition is no more in use, what there is I have been checking structural members on old oil & gas plaforms and there's always confusion when the new codes are used and there's differences in the member capacities. Almost all the codes are very quiet on the...

Hi All, What will be the allowable stress for von mises stress checks to AISC ASD 1989 Edition? Major axis bending Fby = 0.66Fy Minor axis bending Fbz = 0.75Fy Tension Ft = 0.6Fy Shear fv = 0.4Fy Combined stress check fa/Fa + fby/Fby + fbz/Fbz < 1.0 v.m = ((fa + fby +fbz)^2 + 3(fvy +...