EWI model MO24 mic case crush test:

Objective:  Determine the static load weight required to push the bottom rubber feet into the bottom panel of the case:

Test procedure: 

1)  The case was positioned on a scale equipped pallet jack:

2)  The top 4 ball corners of the case were secured from raising with blocking wedged under a secured beam:

3)  The pressure crush pressure was incrementally increased by the pallet jack @ approx. 50lb. increments:

4)  At 1307 lbs. crush pressure was the point where the first "something" on the bottom of the case yielded.  The crush test was stopped at this point to tear-down the test apparatus and determine what was that first yield / failure point was on the case:

5)  Inspection of the case revealed the failed portion of the case was a ball corner rivet that had failed on the bottom of the case near one of the rubber feet.  No other damage to the case was apparent:

Conclusion:

1307 lbs static weight applied to the top of the case was insufficient to push the rubber feet into the bottom panel of the case.  Higher poundage of crush weight will be necessary to determine the yield strength pushing the rubber feet into the bottom panel of the case.