Which bolt should be used for a beam support with different yield strengths?

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When selecting a bolt for a beam support, the yield strength of the bolt is crucial, as it should be designed per the bolt's yield strength rather than the material being bolted. The discussion highlights that different yield strengths of the plate and bolt can lead to varying bolt diameters, with the lower shear strength of the plate necessitating a larger bolt diameter. Ultimately, the appropriate bolt size should prioritize the bolt's yield strength to ensure structural integrity. Proper design considerations must account for stress-limiting factors in the joint geometry. The conclusion emphasizes the importance of adhering to these engineering principles for optimal performance.
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I have calculated two diameters of a bolt to be used in a beam support using a plate at each side supported in a cradle with a hinge pin.

i used shear strength and a constant load to find the diameters the reason i have two different diameters is because the plate and bolt have different yeild strengths

the plate has the lower shear strength and resulted in a bigger diameter of bolt.

what bolt should be used?

thanks for any answers
 
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You design a bolted joint per the yield strength of the bolt, not the material it's bolting (unless the geometry has stress-limiting factors).
 
nice one mate
 

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