I've had a shelf come free from the wall on which it was anchored. The shelf is fairly deep (~2') and solid wood, so it's heavy, and it's meant to take some weight (think like a breakfast bar).
The two 90ยบ triangle brackets supporting the shelf pulled the anchors and bolts right out of the brick wall when somebody leaned on it.
Now I have four ~3/4" holes in the brick from the previous anchors. The previous anchors look like this:
They've left pretty smooth holes. So I now need to work out the best way to re-use those positions on the wall for new, more appropriate/stronger anchors. I could drill out new holes in the brackets to avoid the existing holes in the wall, but I'd rather not if possible.
Any suggestions would be appreciated!
Update: A photo of the actual hardware. They're 1/2" holes, according to the writing on the anchor.
Best Answer
The anchor you show is a lead anchor that is often used for masonry. However, as you see it failed. Lead is crushed into the walls of the hole by the screw or bolt holding it, but is prone to tearing under heavy load. The walls of the hole may also crumble under heavy pressure.
If the holes are truly 3/4, you can use an expansion fastener that is steel, such as this one. It is less prone to failure.
However, I would strongly urge that you increase the number of support brackets, or you will be facing the same type of situation you already have.
If the holes are larger or uneven or crumbly, drill new holes.