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Are the supplied DTI (Direct Tension Indicator) bolt washers required to be installed on all Strong Frame Ordinary Moment Frames?

April 26, 2017bolt dti indicator installed strong supplied Tension washers

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Are the supplied DTI (Direct Tension Indicator) bolt washers required to be installed on all Strong Frame Ordinary Moment Frames?

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We recommend that the DTIs be installed in all conditions, as the orange silicone that squirts out makes it easy to verify that the bolts are tight. If the DTI washers are not used, the designer must specify an alternate method to verify the bolts are tight and to provide inspection of the bolt installation when required. Additional hardened washers may be required for pretensioned joints, depending on the pretensioning method that is used. Please see Bolt-Tightening Requirements (page 15 in the C-SF10 Strong Frame Ordinary Moment Frame catalog) for detailed information on use of DTI washers and bolt tightening requirements.