Someone

uptime|gawk  '{ print $12 }' | tr -d '.'   > load
while read Inbr
  do
    echo $Inbr
    if [ `bc -l <<< $Inbr` -gt 50 ]; then
      /usr/bin/reboot
      else
         echo "Less or equal to 50. Not rebooting."
      fi
done < load