The spanner in question was 6" long, I weigh 79.7 kilograms- does that help?
If you put all your weight on the very end of the spanner (and your body left the floor) then you have been tightening the bolts to:
79.7kg / 6"
or
39.85kg / ft
87.85lbs / ft
@tynan started
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If you put all your weight on the very end of the spanner (and your body left the floor) then you have been tightening the bolts to:
79.7kg / 6"
or
39.85kg / ft
or
87.85lbs / ft