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JM Mechanical Bolt

  1. Drill applicable 1" or 1-3/8" diameter hole approximately 1"-1-1/2" longer than bolt when completely assembled. Measure from where the plate touches the roof to the top of the bolt. Adjustment to be made to accommodate header boards, crossbars, plank, etc.

  2. Insert bolt into hole. If bolt equipped with bail type expansion shell, slide plastic retaining sleeve from expansion shell before inserting it into hole.

  3. With the bolt in the bolt wrench, raise to top of the hole. Just hold bolt snug against roof while applying torque. Do not apply excessive up thrust when torqueing bolt. Always keep hands from rotating parts.

  4. Torque bolt to 125-225 ft-lbs (5/8" system), 200-350 ft/lbs (3/4" system), or 250-400 ft-lbs (7/8" system). This completes installation.


 

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