Lines will first fail at the knot. The following table is copied from Poynter (8.5.2):
| Knot | Reduction in T.S. Percent | Source | Notes |
|---|---|---|---|
| Overhand | 55 | Poynter | |
| Square | 50 | Poynter | |
| Bowline | 40 | Poynter | |
| Splice | 20 | Poynter |
Spectra Line Slip-Resistant Knot
Dan Poynter, The Parachute Manual: A Technical Treatise on Aerodynamic Decelerators, Third Ed.
Richards, Knot Break Strength vs Rope Break Strength