Inpector Benefits
When SQUIRTER® DTIs are used, the inspector's work drops substantially.
Just look at this typical connection that has been done with SQUIRTER® DTIs. The inspector can tell from ten feet away which bolts have been done, and, look carefully, which have not. No feeler gage!
When DTI's are used, inspectors don't have to lug around a big torque wrench up on the steelwork, and try to keep from falling while measuring a lot of meaningless torques. Instead, they just carry a little feeler gage in their pocket and check about 10% of the compressed DTI's to see if the DTI bumps have been compressed sufficiently. And because there is a DTI on every bolt in the connection, the real inspection tends to be done by the bolt installer, which is who should do it anyway. Instead of grunting on a torque wrench, and in effect correcting all the erector's not-quite-tight bolts, inspectors can concentrate on inspecting other items requiring their attention.
For some types of structures, for example bridge connections with many hundreds of bolts, or conections containing many large diameter high strength bolts, DTI's really are the only way that inspection can be accomplished at all.
