All changes to tower
| Date | Change | Source |
|---|---|---|
| 23 Apr 2020 | fr1: date,truss,layout added; mod date,mod maker,mod truss added | Tim Jackson via e-mail |
| 3 Jun 2017 | 1-4 frameid added; frame info added | David Sloman via e-mail |
| 27 Jan 2016 | 1-3: nominal added | Chris Pickford via 00011491 |
| 25 Apr 2007 | Tenor nominal added (G-7c) | GAD NBR spreadsheet via pNBR |