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Hi desertfox Thanks for getting back to me on this, I think with all the calculation that have been done for the main areas where the welding and bolt connection are these will be acceptable, From this will set up a document what will go over the area which have been highlighted so that it make...

Hi desertfox I have had a look around and the manufacture of the davit don't give that information. Here are the following for the davit base Base size : 584.2mm square Hole positions : 508mm square Hole size: 20.574mm just want to make sure that is was not miss in my earlier post, the davit...

He desertfox Please see the layout of the plate and retrospect to the load and swing

Yes sorry my bad. I will get the drawing of the plant on Monday when I'm back in the office. thanks again.

Hi desertfox I have changed it around and i now get 0.005089N/mm^2 Now im looking that is and i cant see a connection to the plate strength stopping the head/nut being pulled through. Im either not getting it or there a part which im missing??

Hi derertfox I too what you have said and this is what i have come up with Bolt used : 3/4 grade 5 UNC (http://www.engineershandbook.com/Tables/threadlimits2.htm) F: Perload force At = As:Area of the perload Sp: Proof load of bolt 18400 lb...

Hi derertfox Thanks for getting back to me, i think that getting me confused is that i'm using the specification of a plate being used: http://www.onealsteel.com/carbon-steel-plate-a36.html It has a yield stress over a range of thickness, obviously the thinner plate wont handle the same...

Hi desertfox Thanks for the information, when i try and do bolt connection i always go for FoS of 3 as a minimum for main bolting load joints. ( it maybe over the top but in my eye its safer). Ill add a 10% shear load to the set-up of the bolts as this will be on a vessel. The base which its...

Thanks desertfox for the feedback understand what your saying just making use i'm not missing something RafaelCosta thank you for your input and also the area which I need to look into for a better accuracy on my data. I will also sate that the davit it self is off the self item with...

andriver Thanks for the help and ill have a look over the shear as well desertfox thanks for the link i will have a check over this Also looking over the moment acting on the end of the arm, would the mast hight also affect the stress? like a leaver action?

Thanks for that. Yes the distance is 508mm so it should read 254mm sorry about that. 18329775 N/mm / 508 = 36082.23N / 2 = 18041.1N A = 3.14 x 7.8^2 = 191.03mm^2............18041.1 / 191.03 = 94.44N/mm^2 (MPa)) 400 / 94.44 = 4.23 factor of safety (FoS) I could add the shear stress but...

Thank again for your replay. im sorry if you cant follow me as i have dyslexia so my grammar is not the best, I am an engineer i have a BEng Honers in operations engineering, my problem is that i don't do the calculation in my position at work, as it more to do with making sure the kit is ready...

andriver thanks for you reply. I was trying to get a simple formula without going over the top with out having to do moment calculation, yes i know it not the bet way to do things. due to not doing a moment, i estimated that the force would act towards the point of loading on the arm to make...

Hi there I'm currently trying to find a equation/formula to help show the applied for acting on a bolt and making sure its within the yield strength of the bolt. From the image you have a davit with a load on the end, this will then transfers the force onto the bolts. Currently i have used...