Fluffy, I want to drill a 10mm hole through this beam to hang a punching bag that weighs approx 40kg. The beam runs from the house bricks to a brick pillar on the other side of the garage/carport. You can see by the attached pics where I have marked the hole, can you see any problems with drilling that size hole in it?
Drilling the hole will not weaken the structural strenth of a beam that size. You could easily mount an anchor point for a fall arrest on it. Just make sure its well connected at the ends (looks structural so should be fine). If you are happy enough to do a chin up you will be fine. Personally i would chuck a washer on each side due to the nature of the bag swinging below but its probably overkill.
