> Since dry vs wet can vary greatly, any structural bolts that would be > torqued under my supervision must be done per the AISC Calibrated torque > wrench method to verify proper tension. But since you people are mere > peons, not able to fully appreciate a Wilhelm-Skidmore bolt tensioner, I > would go off the following rule of thumb torque formula: > > T=(KDW)/12=foot-pounds > > where T= torque > K=friction factor > D= Nominal bolt diameter in decimal inches > W=clamp load in pounds > K=0.30 for nonplated fasteners, black finish > K=0.20 for electrodeposited zinc coatings > K=0.15-0.18 for oils > K=0.16 for cadmium electrodeposited coatings > K=0.12 for copper anti-seize compound > > Standard practice is to tighten a bolt to 70-75% of the proof load. Proof > load is the point where a bolt will permanently deform more than 2%. > > Let me know if you need any more schooling.
What we need is ENGLISH not ENGINEERING-EZE. Regards, Henry S. Winokur 94 GTS1000, AMA, MRF, Nationally Certified Riding Instructor Columbia, MD Ride for Kids Task Force West Bethesda, MD USA
