HOOK_START, HOOK_END
This is a template attribute. Template attributes can be used in filtering, or to retrieve data from the model to use in drawings and reports. For example, when you create a report, Tekla Structures replaces the attributes added in the report template with the corresponding object property values.
Shows 1 if there is a hook at the start or end of a reinforcing bar, and 0 if there is no hook.