I'm new to the boxing scene. At the end of my backyard is a small garden house that is made out of wood and is not very strong. It's big enough for a punching bag, however, the main beam that supports the structure is not strong enough. I purchased a 3ft bag and punched it with moderate power and it started to shake the house. I'm on a budget so I cannot afford a free standing one. Is there any possible way to support the bag? Maybe a special bracket? There is nothing surrounding the beam. Just a horizontal plank of wood. I've been searching around online and can't seem to find anything. Please let me know