Special Inspection - Turn of the Nut
Special Inspection - Turn of the Nut
(OP)
What device to use for testing bolt nut assembly?
Torque wrench?
Torque wrench?
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Special Inspection - Turn of the Nut
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RE: Special Inspection - Turn of the Nut
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RE: Special Inspection - Turn of the Nut
Preferred tension calibrator seems to be the "Skidmore" http://www.skidmore-wilhelm.com/
During the installation phase, verification testing with a tension calibrator is not required.--Section 8 (8.2.1 for TOTN)
RE: Special Inspection - Turn of the Nut
RE: Special Inspection - Turn of the Nut
RE: Special Inspection - Turn of the Nut
So let me see if I have this correct you bring all plies to a snug tight condition (all plies in contact). Next you determine the method of tightening TOTN or some type of pretensioning. TOTN is based on the amount you turn the nut to get a specified amount of pretension. I assume this amount is somewhat less than the amount of tension that is achieved in a slip critical connection (Table 4 9th edition). There is not a lot of information on the amount needed for tensioning in the TONT.
I was fine with all of this but when you review the thirteenth edition of the AISC it is now called the Turn of the nut pretensioning. Was the name changed just to sound more like the other methods of tightening or are they really trying to put more of an emphasis on the amount of tensioning going into the bolt?
RE: Special Inspection - Turn of the Nut