Would this beam support me?

Wanted someplace to do some pull ups and thought possibly I might use this. The plan is to simply put a cable excessive of it and simply use that, or one thing comparable anyway. I’m simply nervous about breaking one thing and bringing the higher deck down on high of me haha. The beam itself has a width of 18.5cm and a thickness of 5cm. I weigh round 87kg. My ft could be fully off the bottom so my whole weight could be beneath it. I’ve taken footage of the beam and the helps holding it. I don’t know something about this type of stuff so if I’ve missed something vital please let me know, thanks 🙂