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Is this a terrible idea?
It's not the dead weight that's the problem, but the movement.
Breeze blocks are quite soft - certainly a lot softer than modern brick or cent blocks. I'd worry that any anchor would crumble it over time.
Chuck it in the garden with a frame made from 4x4 fenceposts, concreted into the ground.
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Chemical anchors would probably be bare minimum. Most breeze blocks are hollow in places so you would be relying on lucky spacing not to have just a wall of cement and a big gap, that's where the chemical fixings come in.
It's not a definitely bad idea but you probably need to try it and see, it might work, it might not. It's easier to test out than a hammock!
I'm debating putting up a heavy punch bag in our spare room, but am slightly afraid of shaking the house down.
It's like this
A pretty burly unit. The wall I have eyed up is an internal partition wall. House is a 1930's semi, the wall is solid, I believe its made of breeze blocks, but not sure. I've drilled a few holes and they are grey coloured.
The bag is a heavy thai bag, maybe 40kg? Was planning on getting some big wall anchors to secure to the wall, or possible those fixings that glue in.
Is this a terrible idea?