I am being consulted on some DTI s
I am being consulted on some DTI s
(OP)
I am being consulted on some DTI (Direct Tension Indicators) that were installed as follows:
1. ¾ inch diameter A325, for slip critical joints, contractor used DTI
2. Contractor installed DTI under nut which is not the best application
3. Contractor did not use a hardened washer between DTI and nut (turning element)
4. Contractor asked DTI manufacturer to duplicate the filed condition using Skidmore tool
5. Test results from six (6) bolts indicated that only at tension of 34 kips; the feeler gage had refusals to qualify proper tension
Does any one have words of wisdom? There are many bolts that already installed. Your quick response would be greatly appreciated.
Good night
1. ¾ inch diameter A325, for slip critical joints, contractor used DTI
2. Contractor installed DTI under nut which is not the best application
3. Contractor did not use a hardened washer between DTI and nut (turning element)
4. Contractor asked DTI manufacturer to duplicate the filed condition using Skidmore tool
5. Test results from six (6) bolts indicated that only at tension of 34 kips; the feeler gage had refusals to qualify proper tension
Does any one have words of wisdom? There are many bolts that already installed. Your quick response would be greatly appreciated.
Good night





RE: I am being consulted on some DTI s
RE: I am being consulted on some DTI s
RE: I am being consulted on some DTI s
Now having said all that, I just opened the 85 code and Table 4 requires 28 kips for 3/4 bolts. Adding the additional 5% gets you a value less than 30 kips. So your DTI manufacturer says he gets 34 kips, you are allowed to go over, what is your concern? If you question the acceptability of the joints, and I would based on the improper use of DTI's, arbitrate them.
RE: I am being consulted on some DTI s