Turn-Of-Nut Bolting Method

AISC & RCSC Turn-of-Nut (Part Turn)Note: As with every bolt pretensioning method, Turn-of-Nut may only be performed after all steel plies in a connection have been drawn into firm contact, i.e. snug-tightened. Failure to do so will result in inadequate bolt pretension and loose connections. Also, The Pre-installation Verification fastener testing must be conducted per applicable RCSC sections with the caveat that Turn-of-Nut verification may not verified by Direct Tension Indicator verification (RCSC 48).

Turn-of-Nut is performed by rotating the nut or bolt of a fastener assembly a specific turn angle based on the fastener's length, and diameter while restraining the unturned element from rotating.

https://www.appliedbolting.com/turn-of-nut-dsq.php

Slip-Critical Connections

https://www.canambridges.com/slip-critical-connections-use-of-the-turn-of-nut-method/