This specification covers the requirements for compressible-washer-type direct tension indicators capable of indicating the achievement of a specified minimum bolt tension in an XTB or XTB-HX structural bolt.
Direct Tension Indicators for high strength structural steel bolts of a strength higher than that of ASTM A325 and A490. To be used in structural steel buildings and similar engineering structures. For future adoption as a reference standard by American Institute of Steel Construction (AISC 360 and AISC 358), Canadian Standards Association (S16), and Research Council on Structural Connections (Specification for Structural Joints Using High Strength Bolts).
Keywordscompressible-washer-type; direct tension indicators; DTI; indicators
The title and scope are in draft form and are under development within this ASTM Committee.Back to Top
Draft Under Development