I have to explain how I got that info.
1. Get full health
2. Make the trap
3. Get damaged by it
4. Print Screen/Screen Grab
5. Paste to Excel
6. Crop to only get the HP Bar
7. Get 20 columns and modify it's width to get it within the HP bar
8. Check the difference and estimate
So yeah, that pretty much is just a rough estimate of the damage of traps based from that step.
Some things to consider:
1. Hard to get the exact damage because each zombie has different HP
2. I don't know if the damage of Traps are different for the Zombies due to Perks or other reasons.
3. That or if the player suffer decreased damage from Traps he makes.
4. Also, do Headshots deal increased damage? If it does, what's the multiplier?
5. If #4 is true, Pendulums, Compressors, Guillotines will deal MORE damage to zombies just for that very reason.
If you guys got any question regarding that, feel free to ask